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pandoc(1) Pandoc User's Guide pandoc(1)

NAME
pandoc - general markup converter

SYNOPSIS
pandoc [options] [input-file]...

DESCRIPTION
Pandoc is a Haskell library for converting from one markup format to
another, and a command-line tool that uses this library.

Pandoc can convert between numerous markup and word processing formats,
including, but not limited to, various flavors of Markdown, HTML, LaTeX
and Word docx. For the full lists of input and output formats, see the
--from and --to options below. Pandoc can also produce PDF output: see
creating a PDF, below.

Pandoc's enhanced version of Markdown includes syntax for tables, defi-
nition lists, metadata blocks, footnotes, citations, math, and much
more. See below under Pandoc's Markdown.

Pandoc has a modular design: it consists of a set of readers, which
parse text in a given format and produce a native representation of the
document (an abstract syntax tree or AST), and a set of writers, which
convert this native representation into a target format. Thus, adding
an input or output format requires only adding a reader or writer.
Users can also run custom pandoc filters to modify the intermediate
AST.

Because pandoc's intermediate representation of a document is less ex-
pressive than many of the formats it converts between, one should not
expect perfect conversions between every format and every other. Pan-
doc attempts to preserve the structural elements of a document, but not
formatting details such as margin size. And some document elements,
such as complex tables, may not fit into pandoc's simple document
model. While conversions from pandoc's Markdown to all formats aspire
to be perfect, conversions from formats more expressive than pandoc's
Markdown can be expected to be lossy.

Using pandoc
If no input-files are specified, input is read from stdin. Output goes
to stdout by default. For output to a file, use the -o option:

pandoc -o output.html input.txt

By default, pandoc produces a document fragment. To produce a stand-
alone document (e.g. a valid HTML file including <head> and <body>),
use the -s or --standalone flag:

pandoc -s -o output.html input.txt

For more information on how standalone documents are produced, see Tem-
plates below.

If multiple input files are given, pandoc will concatenate them all
(with blank lines between them) before parsing. (Use --file-scope to
parse files individually.)

Specifying formats
The format of the input and output can be specified explicitly using
command-line options. The input format can be specified using the
-f/--from option, the output format using the -t/--to option. Thus, to
convert hello.txt from Markdown to LaTeX, you could type:

pandoc -f markdown -t latex hello.txt

To convert hello.html from HTML to Markdown:

pandoc -f html -t markdown hello.html

Supported input and output formats are listed below under Options (see
-f for input formats and -t for output formats). You can also use pan-
doc --list-input-formats and pandoc --list-output-formats to print
lists of supported formats.

If the input or output format is not specified explicitly, pandoc will
attempt to guess it from the extensions of the filenames. Thus, for
example,

pandoc -o hello.tex hello.txt

will convert hello.txt from Markdown to LaTeX. If no output file is
specified (so that output goes to stdout), or if the output file's ex-
tension is unknown, the output format will default to HTML. If no in-
put file is specified (so that input comes from stdin), or if the input
files' extensions are unknown, the input format will be assumed to be
Markdown.

Character encoding
Pandoc uses the UTF-8 character encoding for both input and output. If
your local character encoding is not UTF-8, you should pipe input and
output through iconv:

iconv -t utf-8 input.txt | pandoc | iconv -f utf-8

Note that in some output formats (such as HTML, LaTeX, ConTeXt, RTF,
OPML, DocBook, and Texinfo), information about the character encoding
is included in the document header, which will only be included if you
use the -s/--standalone option.

Creating a PDF
To produce a PDF, specify an output file with a .pdf extension:

pandoc test.txt -o test.pdf

By default, pandoc will use LaTeX to create the PDF, which requires
that a LaTeX engine be installed (see --pdf-engine below). Alterna-
tively, pandoc can use ConTeXt, roff ms, or HTML as an intermediate
format. To do this, specify an output file with a .pdf extension, as
before, but add the --pdf-engine option or -t context, -t html, or -t
ms to the command line. The tool used to generate the PDF from the in-
termediate format may be specified using --pdf-engine.

You can control the PDF style using variables, depending on the inter-
mediate format used: see variables for LaTeX, variables for ConTeXt,
variables for wkhtmltopdf, variables for ms. When HTML is used as an
intermediate format, the output can be styled using --css.

To debug the PDF creation, it can be useful to look at the intermediate
representation: instead of -o test.pdf, use for example -s -o test.tex
to output the generated LaTeX. You can then test it with pdflatex
test.tex.

When using LaTeX, the following packages need to be available (they are
included with all recent versions of TeX Live): amsfonts, amsmath, lm,
unicode-math, iftex, listings (if the --listings option is used), fan-
cyvrb, longtable, booktabs, [multirow] (if the document contains a ta-
ble with cells that cross multiple rows), graphicx (if the document
contains images), bookmark, xcolor, soul, geometry (with the geometry
variable set), setspace (with linestretch), and babel (with lang). If
CJKmainfont is set, xeCJK is needed if xelatex is used, else luatexja
is needed if lualatex is used. framed is required if code is high-
lighted in a scheme that use a colored background. The use of xelatex
or lualatex as the PDF engine requires fontspec. lualatex uses selno-
lig and lua-ul. xelatex uses bidi (with the dir variable set). If the
mathspec variable is set, xelatex will use mathspec instead of uni-
code-math. The upquote and microtype packages are used if available,
and csquotes will be used for typography if the csquotes variable or
metadata field is set to a true value. The natbib, biblatex, bibtex,
and biber packages can optionally be used for citation rendering. If
math with \cancel, \bcancel, or \xcancel is used, the cancel package is
needed. The following packages will be used to improve output quality
if present, but pandoc does not require them to be present: upquote
(for straight quotes in verbatim environments), microtype (for better
spacing adjustments), parskip (for better inter-paragraph spaces), xurl
(for better line breaks in URLs), and footnotehyper or footnote (to al-
low footnotes in tables).

Reading from the Web
Instead of an input file, an absolute URI may be given. In this case
pandoc will fetch the content using HTTP:

pandoc -f html -t markdown https://www.fsf.org

It is possible to supply a custom User-Agent string or other header
when requesting a document from a URL:

pandoc -f html -t markdown --request-header User-Agent:"Mozilla/5.0" \
https://www.fsf.org

OPTIONS
General options
-f FORMAT, -r FORMAT, --from=FORMAT, --read=FORMAT
Specify input format. FORMAT can be:

• bibtex (BibTeX bibliography)

• biblatex (BibLaTeX bibliography)

• bits (BITS XML, alias for jats)

• commonmark (CommonMark Markdown)

• commonmark_x (CommonMark Markdown with extensions)

• creole (Creole 1.0)

• csljson (CSL JSON bibliography)

• csv (CSV table)

• tsv (TSV table)

• djot (Djot markup)

• docbook (DocBook)

• docx (Word docx)

• dokuwiki (DokuWiki markup)

• endnotexml (EndNote XML bibliography)

• epub (EPUB)

• fb2 (FictionBook2 e-book)

• gfm (GitHub-Flavored Markdown), or the deprecated and less ac-
curate markdown_github; use markdown_github only if you need
extensions not supported in gfm.

• haddock (Haddock markup)

• html (HTML)

• ipynb (Jupyter notebook)

• jats (JATS XML)

• jira (Jira/Confluence wiki markup)

• json (JSON version of native AST)

• latex (LaTeX)

• markdown (Pandoc's Markdown)

• markdown_mmd (MultiMarkdown)

• markdown_phpextra (PHP Markdown Extra)

• markdown_strict (original unextended Markdown)

• mediawiki (MediaWiki markup)

• man (roff man)

• mdoc (mdoc manual page markup)

• muse (Muse)

• native (native Haskell)

• odt (OpenDocument text document)

• opml (OPML)

• org (Emacs Org mode)

• pod (Perl's Plain Old Documentation)

• ris (RIS bibliography)

• rtf (Rich Text Format)

• rst (reStructuredText)

• t2t (txt2tags)

• textile (Textile)

• tikiwiki (TikiWiki markup)

• twiki (TWiki markup)

• typst (typst)

• vimwiki (Vimwiki)

• xml (XML version of native AST)

• the path of a custom Lua reader, see Custom readers and writ-
ers below

Extensions can be individually enabled or disabled by appending
+EXTENSION or -EXTENSION to the format name. See Extensions be-
low, for a list of extensions and their names. See --list-in-
put-formats and --list-extensions, below.

-t FORMAT, -w FORMAT, --to=FORMAT, --write=FORMAT
Specify output format. FORMAT can be:

• ansi (text with ANSI escape codes, for terminal viewing)

• asciidoc (modern AsciiDoc as interpreted by AsciiDoctor)

• asciidoc_legacy (AsciiDoc as interpreted by asciidoc-py).

• asciidoctor (deprecated synonym for asciidoc)

• beamer (LaTeX beamer slide show)

• bibtex (BibTeX bibliography)

• biblatex (BibLaTeX bibliography)

• chunkedhtml (zip archive of multiple linked HTML files)

• commonmark (CommonMark Markdown)

• commonmark_x (CommonMark Markdown with extensions)

• context (ConTeXt)

• csljson (CSL JSON bibliography)

• djot (Djot markup)

• docbook or docbook4 (DocBook 4)

• docbook5 (DocBook 5)

• docx (Word docx)

• dokuwiki (DokuWiki markup)

• epub or epub3 (EPUB v3 book)

• epub2 (EPUB v2)

• fb2 (FictionBook2 e-book)

• gfm (GitHub-Flavored Markdown), or the deprecated and less ac-
curate markdown_github; use markdown_github only if you need
extensions not supported in gfm.

• haddock (Haddock markup)

• html or html5 (HTML, i.e. HTML5/XHTML polyglot markup)

• html4 (XHTML 1.0 Transitional)

• icml (InDesign ICML)

• ipynb (Jupyter notebook)

• jats_archiving (JATS XML, Archiving and Interchange Tag Set)

• jats_articleauthoring (JATS XML, Article Authoring Tag Set)

• jats_publishing (JATS XML, Journal Publishing Tag Set)

• jats (alias for jats_archiving)

• jira (Jira/Confluence wiki markup)

• json (JSON version of native AST)

• latex (LaTeX)

• man (roff man)

• markdown (Pandoc's Markdown)

• markdown_mmd (MultiMarkdown)

• markdown_phpextra (PHP Markdown Extra)

• markdown_strict (original unextended Markdown)

• markua (Markua)

• mediawiki (MediaWiki markup)

• ms (roff ms)

• muse (Muse)

• native (native Haskell)

• odt (OpenDocument text document)

• opml (OPML)

• opendocument (OpenDocument XML)

• org (Emacs Org mode)

• pdf (PDF)

• plain (plain text)

• pptx (PowerPoint slide show)

• rst (reStructuredText)

• rtf (Rich Text Format)

• texinfo (GNU Texinfo)

• textile (Textile)

• slideous (Slideous HTML and JavaScript slide show)

• slidy (Slidy HTML and JavaScript slide show)

• dzslides (DZSlides HTML5 + JavaScript slide show)

• revealjs (reveal.js HTML5 + JavaScript slide show)

• s5 (S5 HTML and JavaScript slide show)

• tei (TEI Simple)

• typst (typst)

• vimdoc (Vimdoc)

• xml (XML version of native AST)

• xwiki (XWiki markup)

• zimwiki (ZimWiki markup)

• the path of a custom Lua writer, see Custom readers and writ-
ers below

Note that odt, docx, epub, and pdf output will not be directed
to stdout unless forced with -o -.

-o FILE, --output=FILE
Write output to FILE instead of stdout. If FILE is -, output
will go to stdout, even if a non-textual format (docx, odt,
epub2, epub3) is specified. If the output format is chunkedhtml
and FILE has no extension, then instead of producing a .zip file
pandoc will create a directory FILE and unpack the zip archive
there (unless FILE already exists, in which case an error will
be raised).

--data-dir=DIRECTORY
Specify the user data directory to search for pandoc data files.
If this option is not specified, the default user data directory
will be used. On *nix and macOS systems this will be the pandoc
subdirectory of the XDG data directory (by default, $HOME/.lo-
cal/share, overridable by setting the XDG_DATA_HOME environment
variable). If that directory does not exist and $HOME/.pandoc
exists, it will be used (for backwards compatibility). On Win-
dows the default user data directory is %APPDATA%\pandoc. You
can find the default user data directory on your system by look-
ing at the output of pandoc --version. Data files placed in
this directory (for example, reference.odt, reference.docx,
epub.css, templates) will override pandoc's normal defaults.
(Note that the user data directory is not created by pandoc, so
you will need to create it yourself if you want to make use of
it.)

-d FILE, --defaults=FILE
Specify a set of default option settings. FILE is a YAML file
whose fields correspond to command-line option settings. All
options for document conversion, including input and output
files, can be set using a defaults file. The file will be
searched for first in the working directory, and then in the de-
faults subdirectory of the user data directory (see --data-dir).
The .yaml extension may be omitted. See the section Defaults
files for more information on the file format. Settings from
the defaults file may be overridden or extended by subsequent
options on the command line.

--bash-completion
Generate a bash completion script. To enable bash completion
with pandoc, add this to your .bashrc:

eval "$(pandoc --bash-completion)"

--verbose
Give verbose debugging output.

--quiet
Suppress warning messages.

--fail-if-warnings[=true|false]
Exit with error status if there are any warnings.

--log=FILE
Write log messages in machine-readable JSON format to FILE. All
messages above DEBUG level will be written, regardless of ver-
bosity settings (--verbose, --quiet).

--list-input-formats
List supported input formats, one per line.

--list-output-formats
List supported output formats, one per line.

--list-extensions[=FORMAT]
List supported extensions for FORMAT, one per line, preceded by
a + or - indicating whether it is enabled by default in FORMAT.
If FORMAT is not specified, defaults for pandoc's Markdown are
given.

--list-highlight-languages
List supported languages for syntax highlighting, one per line.

--list-highlight-styles
List supported styles for syntax highlighting, one per line.
See --syntax-highlighting.

-v, --version
Print version.

-h, --help
Show usage message.

Reader options
--shift-heading-level-by=NUMBER
Shift heading levels by a positive or negative integer. For ex-
ample, with --shift-heading-level-by=-1, level 2 headings become
level 1 headings, and level 3 headings become level 2 headings.
Headings cannot have a level less than 1, so a heading that
would be shifted below level 1 becomes a regular paragraph. Ex-
ception: with a shift of -N, a level-N heading at the beginning
of the document replaces the metadata title. --shift-head-
ing-level-by=-1 is a good choice when converting HTML or Mark-
down documents that use an initial level-1 heading for the docu-
ment title and level-2+ headings for sections. --shift-head-
ing-level-by=1 may be a good choice for converting Markdown doc-
uments that use level-1 headings for sections to HTML, since
pandoc uses a level-1 heading to render the document title.

--base-header-level=NUMBER
Deprecated. Use --shift-heading-level-by=X instead, where X =
NUMBER - 1. Specify the base level for headings (defaults to 1).

--indented-code-classes=CLASSES
Specify classes to use for indented code blocks--for example,
perl,numberLines or haskell. Multiple classes may be separated
by spaces or commas.

--default-image-extension=EXTENSION
Specify a default extension to use when image paths/URLs have no
extension. This allows you to use the same source for formats
that require different kinds of images. Currently this option
only affects the Markdown and LaTeX readers.

--file-scope[=true|false]
Parse each file individually before combining for multifile doc-
uments. This will allow footnotes in different files with the
same identifiers to work as expected. If this option is set,
footnotes and links will not work across files. Reading binary
files (docx, odt, epub) implies --file-scope.

If two or more files are processed using --file-scope, prefixes
based on the filenames will be added to identifiers in order to
disambiguate them, and internal links will be adjusted accord-
ingly. For example, a header with identifier foo in sub-
dir/file1.txt will have its identifier changed to sub-
dir__file1.txt__foo.

-F PROGRAM, --filter=PROGRAM
Specify an executable to be used as a filter transforming the
pandoc AST after the input is parsed and before the output is
written. The executable should read JSON from stdin and write
JSON to stdout. The JSON must be formatted like pandoc's own
JSON input and output. The name of the output format will be
passed to the filter as the first argument. Hence,

pandoc --filter ./caps.py -t latex

is equivalent to

pandoc -t json | ./caps.py latex | pandoc -f json -t latex

The latter form may be useful for debugging filters.

Filters may be written in any language. Text.Pandoc.JSON ex-
ports toJSONFilter to facilitate writing filters in Haskell.
Those who would prefer to write filters in python can use the
module pandocfilters, installable from PyPI. There are also
pandoc filter libraries in PHP, perl, and JavaScript/node.js.

In order of preference, pandoc will look for filters in

1. a specified full or relative path (executable or non-exe-
cutable),

2. $DATADIR/filters (executable or non-executable) where
$DATADIR is the user data directory (see --data-dir, above),

3. $PATH (executable only).

Filters, Lua-filters, and citeproc processing are applied in the
order specified on the command line.

-L SCRIPT, --lua-filter=SCRIPT
Transform the document in a similar fashion as JSON filters (see
--filter), but use pandoc's built-in Lua filtering system. The
given Lua script is expected to return a list of Lua filters
which will be applied in order. Each Lua filter must contain
element-transforming functions indexed by the name of the AST
element on which the filter function should be applied.

The pandoc Lua module provides helper functions for element cre-
ation. It is always loaded into the script's Lua environment.

See the Lua filters documentation for further details.

In order of preference, pandoc will look for Lua filters in

1. a specified full or relative path,

2. $DATADIR/filters where $DATADIR is the user data directory
(see --data-dir, above).

Filters, Lua filters, and citeproc processing are applied in the
order specified on the command line.

-M KEY[=VAL], --metadata=KEY[:VAL]
Set the metadata field KEY to the value VAL. A value specified
on the command line overrides a value specified in the document
using YAML metadata blocks. Values will be parsed as YAML
boolean or string values. If no value is specified, the value
will be treated as Boolean true. Like --variable, --metadata
causes template variables to be set. But unlike --variable,
--metadata affects the metadata of the underlying document
(which is accessible from filters and may be printed in some
output formats) and metadata values will be escaped when in-
serted into the template.

--metadata-file=FILE
Read metadata from the supplied YAML (or JSON) file. This op-
tion can be used with every input format, but string scalars in
the metadata file will always be parsed as Markdown. (If the
input format is Markdown or a Markdown variant, then the same
variant will be used to parse the metadata file; if it is a
non-Markdown format, pandoc's default Markdown extensions will
be used.) This option can be used repeatedly to include multi-
ple metadata files; values in files specified later on the com-
mand line will be preferred over those specified in earlier
files. Metadata values specified inside the document, or by us-
ing -M, overwrite values specified with this option. The file
will be searched for first in the working directory, and then in
the metadata subdirectory of the user data directory (see
--data-dir).

-p, --preserve-tabs[=true|false]
Preserve tabs instead of converting them to spaces. (By de-
fault, pandoc converts tabs to spaces before parsing its input.)
Note that this will only affect tabs in literal code spans and
code blocks. Tabs in regular text are always treated as spaces.

--tab-stop=NUMBER
Specify the number of spaces per tab (default is 4).

--track-changes=accept|reject|all
Specifies what to do with insertions, deletions, and comments
produced by the MS Word "Track Changes" feature. accept (the
default) processes all the insertions and deletions. reject ig-
nores them. Both accept and reject ignore comments. all in-
cludes all insertions, deletions, and comments, wrapped in spans
with insertion, deletion, comment-start, and comment-end
classes, respectively. The author and time of change is in-
cluded. all is useful for scripting: only accepting changes
from a certain reviewer, say, or before a certain date. If a
paragraph is inserted or deleted, track-changes=all produces a
span with the class paragraph-insertion/paragraph-deletion be-
fore the affected paragraph break. This option only affects the
docx reader.

--extract-media=DIR
Extract images and other media contained in or linked from the
source document to the path DIR, creating it if necessary, and
adjust the images references in the document so they point to
the extracted files. Media are downloaded, read from the file
system, or extracted from a binary container (e.g. docx), as
needed. The original file paths are used if they are relative
paths not containing ... Otherwise filenames are constructed
from the SHA1 hash of the contents.

--abbreviations=FILE
Specifies a custom abbreviations file, with abbreviations one to
a line. If this option is not specified, pandoc will read the
data file abbreviations from the user data directory or fall
back on a system default. To see the system default, use pandoc
--print-default-data-file=abbreviations. The only use pandoc
makes of this list is in the Markdown reader. Strings found in
this list will be followed by a nonbreaking space, and the pe-
riod will not produce sentence-ending space in formats like La-
TeX. The strings may not contain spaces.

--trace[=true|false]
Print diagnostic output tracing parser progress to stderr. This
option is intended for use by developers in diagnosing perfor-
mance issues.

General writer options
-s, --standalone
Produce output with an appropriate header and footer (e.g. a
standalone HTML, LaTeX, TEI, or RTF file, not a fragment). This
option is set automatically for pdf, epub, epub3, fb2, docx, and
odt output. For native output, this option causes metadata to
be included; otherwise, metadata is suppressed.

--template=FILE|URL
Use the specified file as a custom template for the generated
document. Implies --standalone. See Templates, below, for a
description of template syntax. If the template is not found,
pandoc will search for it in the templates subdirectory of the
user data directory (see --data-dir). If no extension is speci-
fied and an extensionless template is not found, pandoc will
look for a template with an extension corresponding to the
writer, so that --template=special looks for special.html for
HTML output. If this option is not used, a default template ap-
propriate for the output format will be used (see -D/--print-de-
fault-template).

-V KEY[=VAL], --variable=KEY[=VAL]
Set the template variable KEY to the string value VAL when ren-
dering the document in standalone mode. Either : or = may be
used to separate KEY from VAL. If no VAL is specified, the key
will be given the value true. Structured values (lists, maps)
cannot be assigned using this option, but they can be assigned
in the variables section of a defaults file or using the --vari-
able-json option. If the variable already has a list value, the
value will be added to the list. If it already has another kind
of value, it will be made into a list containing the previous
and the new value. For example, -V keyword=Joe -V author=Sue
makes author contain a list of strings: Joe and Sue.

--variable-json=KEY[=:JSON]
Set the template variable KEY to the value specified by a JSON
string (this may be a boolean, a string, a list, or a mapping; a
number will be treated as a string). For example, --vari-
able-json foo=false will give foo the boolean false value, while
--variable-json foo='"false"' will give it the string value
"false". Either : or = may be used to separate KEY from VAL.
If the variable already has a value, this value will be re-
placed.

--sandbox[=true|false]
Run pandoc in a sandbox, limiting IO operations in readers and
writers to reading the files specified on the command line.
Note that this option does not limit IO operations by filters or
in the production of PDF documents. But it does offer security
against, for example, disclosure of files through the use of in-
clude directives. Anyone using pandoc on untrusted user input
should use this option.

Note: some readers and writers (e.g., docx) need access to data
files. If these are stored on the file system, then pandoc will
not be able to find them when run in --sandbox mode and will
raise an error. For these applications, we recommend using a
pandoc binary compiled with the embed_data_files option, which
causes the data files to be baked into the binary instead of be-
ing stored on the file system.

-D FORMAT, --print-default-template=FORMAT
Print the system default template for an output FORMAT. (See -t
for a list of possible FORMATs.) Templates in the user data di-
rectory are ignored. This option may be used with -o/--output
to redirect output to a file, but -o/--output must come before
--print-default-template on the command line.

Note that some of the default templates use partials, for exam-
ple styles.html. To print the partials, use --print-de-
fault-data-file: for example, --print-default-data-file=tem-
plates/styles.html.

--print-default-data-file=FILE
Print a system default data file. Files in the user data direc-
tory are ignored. This option may be used with -o/--output to
redirect output to a file, but -o/--output must come before
--print-default-data-file on the command line.

--eol=crlf|lf|native
Manually specify line endings: crlf (Windows), lf (ma-
cOS/Linux/UNIX), or native (line endings appropriate to the OS
on which pandoc is being run). The default is native.

--dpi=NUMBER
Specify the default dpi (dots per inch) value for conversion
from pixels to inch/centimeters and vice versa. (Technically,
the correct term would be ppi: pixels per inch.) The default is
96dpi. When images contain information about dpi internally,
the encoded value is used instead of the default specified by
this option.

--wrap=auto|none|preserve
Determine how text is wrapped in the output (the source code,
not the rendered version). With auto (the default), pandoc will
attempt to wrap lines to the column width specified by --columns
(default 72). With none, pandoc will not wrap lines at all.
With preserve, pandoc will attempt to preserve the wrapping from
the source document (that is, where there are nonsemantic new-
lines in the source, there will be nonsemantic newlines in the
output as well). In ipynb output, this option affects wrapping
of the contents of Markdown cells.

--columns=NUMBER
Specify length of lines in characters. This affects text wrap-
ping in the generated source code (see --wrap). It also affects
calculation of column widths for plain text tables (see Tables
below).

--toc[=true|false], --table-of-contents[=true|false]
Include an automatically generated table of contents (or, in the
case of latex, context, docx, odt, opendocument, rst, or ms, an
instruction to create one) in the output document. This option
has no effect unless -s/--standalone is used, and it has no ef-
fect on man, docbook4, docbook5, or jats output.

Note that if you are producing a PDF via ms and using (the de-
fault) pdfroff as a --pdf-engine, the table of contents will ap-
pear at the beginning of the document, before the title. If you
would prefer it to be at the end of the document, use the option
--pdf-engine-opt=--no-toc-relocation. If groff is used as the
--pdf-engine, the table of contents will always appear at the
end of the document.

--toc-depth=NUMBER
Specify the number of section levels to include in the table of
contents. The default is 3 (which means that level-1, 2, and 3
headings will be listed in the contents).

--lof[=true|false], --list-of-figures[=true|false]
Include an automatically generated list of figures (or, in some
formats, an instruction to create one) in the output document.
This option has no effect unless -s/--standalone is used, and it
only has an effect on latex, context, and docx output.

--lot[=true|false], --list-of-tables[=true|false]
Include an automatically generated list of tables (or, in some
formats, an instruction to create one) in the output document.
This option has no effect unless -s/--standalone is used, and it
only has an effect on latex, context, and docx output.

--strip-comments[=true|false]
Strip out HTML comments in the Markdown or Textile source,
rather than passing them on to Markdown, Textile or HTML output
as raw HTML. This does not apply to HTML comments inside raw
HTML blocks when the markdown_in_html_blocks extension is not
set.

--syntax-highlighting="default"|"none"|"idiomatic"|STYLE|FILE
The method to use for code syntax highlighting. Setting a spe-
cific STYLE causes highlighting to be performed with the inter-
nal highlighting engine, using KDE syntax definitions and
styles. The "idiomatic" method uses a format-specific high-
lighter if one is available, or the default style if the target
format has no idiomatic highlighting method. Setting this op-
tion to none disables all syntax highlighting. The "default"
method uses a format-specific default.

The default for HTML, EPUB, Docx, Ms, Man, and LaTeX output is
to use the internal highlighter with the default style; Typst
output relies on Typst's own syntax highlighting system by de-
fault.

The listings LaTeX package is used for idiomatic highlighting in
LaTeX. The package does not support multi-byte encoding for
source code. To handle UTF-8 you would need to use a custom
template. This issue is fully documented here: Encoding issue
with the listings package.

Style options are pygments (the default), kate, monochrome,
breezeDark, espresso, zenburn, haddock, and tango. For more in-
formation on syntax highlighting in pandoc, see Syntax high-
lighting, below. See also --list-highlight-styles.

Instead of a STYLE name, a JSON file with extension .theme may
be supplied. This will be parsed as a KDE syntax highlighting
theme and (if valid) used as the highlighting style.

To generate the JSON version of an existing style, use
--print-highlight-style.

--no-highlight
Deprecated, use --syntax-highlighting=none instead.

Disables syntax highlighting for code blocks and inlines, even
when a language attribute is given.

--highlight-style=STYLE|FILE
Deprecated, use --syntax-highlighting=STYLE|FILE instead.

Specifies the coloring style to be used in highlighted source
code.

--print-highlight-style=STYLE|FILE
Prints a JSON version of a highlighting style, which can be mod-
ified, saved with a .theme extension, and used with --syn-
tax-highlighting. This option may be used with -o/--output to
redirect output to a file, but -o/--output must come before
--print-highlight-style on the command line.

--syntax-definition=FILE
Instructs pandoc to load a KDE XML syntax definition file, which
will be used for syntax highlighting of appropriately marked
code blocks. This can be used to add support for new languages
or to use altered syntax definitions for existing languages.
This option may be repeated to add multiple syntax definitions.

-H FILE, --include-in-header=FILE|URL
Include contents of FILE, verbatim, at the end of the header.
This can be used, for example, to include special CSS or
JavaScript in HTML documents. This option can be used repeat-
edly to include multiple files in the header. They will be in-
cluded in the order specified. Implies --standalone.

-B FILE, --include-before-body=FILE|URL
Include contents of FILE, verbatim, at the beginning of the doc-
ument body (e.g. after the <body> tag in HTML, or the \be-
gin{document} command in LaTeX). This can be used to include
navigation bars or banners in HTML documents. This option can
be used repeatedly to include multiple files. They will be in-
cluded in the order specified. Implies --standalone. Note that
if the output format is odt, this file must be in OpenDocument
XML format suitable for insertion into the body of the document,
and if the output is docx, this file must be in appropriate
OpenXML format.

-A FILE, --include-after-body=FILE|URL
Include contents of FILE, verbatim, at the end of the document
body (before the </body> tag in HTML, or the \end{document} com-
mand in LaTeX). This option can be used repeatedly to include
multiple files. They will be included in the order specified.
Implies --standalone. Note that if the output format is odt,
this file must be in OpenDocument XML format suitable for inser-
tion into the body of the document, and if the output is docx,
this file must be in appropriate OpenXML format.

--resource-path=SEARCHPATH
List of paths to search for images and other resources. The
paths should be separated by : on Linux, UNIX, and macOS sys-
tems, and by ; on Windows. If --resource-path is not specified,
the default resource path is the working directory. Note that,
if --resource-path is specified, the working directory must be
explicitly listed or it will not be searched. For example:
--resource-path=.:test will search the working directory and the
test subdirectory, in that order. This option can be used re-
peatedly. Search path components that come later on the command
line will be searched before those that come earlier, so --re-
source-path foo:bar --resource-path baz:bim is equivalent to
--resource-path baz:bim:foo:bar. Note that this option only has
an effect when pandoc itself needs to find an image (e.g., in
producing a PDF or docx, or when --embed-resources is used.) It
will not cause image paths to be rewritten in other cases (e.g.,
when pandoc is generating LaTeX or HTML).

--request-header=NAME:VAL
Set the request header NAME to the value VAL when making HTTP
requests (for example, when a URL is given on the command line,
or when resources used in a document must be downloaded). If
you're behind a proxy, you also need to set the environment
variable http_proxy to http://....

--no-check-certificate[=true|false]
Disable the certificate verification to allow access to unsecure
HTTP resources (for example when the certificate is no longer
valid or self signed).

Options affecting specific writers
--self-contained[=true|false]
Deprecated synonym for --embed-resources --standalone.

--embed-resources[=true|false]
Produce a standalone HTML file with no external dependencies,
using data: URIs to incorporate the contents of linked scripts,
stylesheets, images, and videos. The resulting file should be
"self-contained," in the sense that it needs no external files
and no net access to be displayed properly by a browser. This
option works only with HTML output formats, including html4,
html5, html+lhs, html5+lhs, s5, slidy, slideous, dzslides, and
revealjs. Scripts, images, and stylesheets at absolute URLs
will be downloaded; those at relative URLs will be sought rela-
tive to the working directory (if the first source file is lo-
cal) or relative to the base URL (if the first source file is
remote). Elements with the attribute data-external="1" will be
left alone; the documents they link to will not be incorporated
in the document. Limitation: resources that are loaded dynami-
cally through JavaScript cannot be incorporated; as a result,
fonts may be missing when --mathjax is used, and some advanced
features (e.g. zoom or speaker notes) may not work in an offline
"self-contained" reveal.js slide show.

For SVG images, img tags with data: URIs are used, unless the
image has the class inline-svg, in which case an inline SVG ele-
ment is inserted. This approach is recommended when there are
many occurrences of the same SVG in a document, as <use> ele-
ments will be used to reduce duplication.

--link-images[=true|false]
Include links to images instead of embedding the images in ODT.
(This option currently only affects ODT output.)

--html-q-tags[=true|false]
Use <q> tags for quotes in HTML. (This option only has an ef-
fect if the smart extension is enabled for the input format
used.)

--ascii[=true|false]
Use only ASCII characters in output. Currently supported for
XML and HTML formats (which use entities instead of UTF-8 when
this option is selected), CommonMark, gfm, and Markdown (which
use entities), roff man and ms (which use hexadecimal escapes),
and to a limited degree LaTeX (which uses standard commands for
accented characters when possible).

--reference-links[=true|false]
Use reference-style links, rather than inline links, in writing
Markdown or reStructuredText. By default inline links are used.
The placement of link references is affected by the --refer-
ence-location option.

--reference-location=block|section|document
Specify whether footnotes (and references, if reference-links is
set) are placed at the end of the current (top-level) block, the
current section, or the document. The default is document.
Currently this option only affects the markdown, muse, html,
epub, slidy, s5, slideous, dzslides, and revealjs writers. In
slide formats, specifying --reference-location=section will
cause notes to be rendered at the bottom of a slide.

--figure-caption-position=above|below
Specify whether figure captions go above or below figures (de-
fault is below). This option only affects HTML, LaTeX, Docx,
ODT, and Typst output.

--table-caption-position=above|below
Specify whether table captions go above or below tables (default
is above). This option only affects HTML, LaTeX, Docx, ODT, and
Typst output.

--markdown-headings=setext|atx
Specify whether to use ATX-style (#-prefixed) or Setext-style
(underlined) headings for level 1 and 2 headings in Markdown
output. (The default is atx.) ATX-style headings are always
used for levels 3+. This option also affects Markdown cells in
ipynb output.

--list-tables[=true|false]
Render tables as list tables in RST output.

--top-level-division=default|section|chapter|part
Treat top-level headings as the given division type in LaTeX,
ConTeXt, DocBook, and TEI output. The hierarchy order is part,
chapter, then section; all headings are shifted such that the
top-level heading becomes the specified type. The default be-
havior is to determine the best division type via heuristics:
unless other conditions apply, section is chosen. When the doc-
umentclass variable is set to report, book, or memoir (unless
the article option is specified), chapter is implied as the set-
ting for this option. If beamer is the output format, specify-
ing either chapter or part will cause top-level headings to be-
come \part{..}, while second-level headings remain as their de-
fault type.

In Docx output, this option adds section breaks before
first-level headings if chapter is selected, and before first-
and second-level headings if part is selected. Footnote numbers
will restart with each section break unless the reference doc
modifies this.

-N, --number-sections=[true|false]
Number section headings in LaTeX, ConTeXt, HTML, Docx, ms, or
EPUB output. By default, sections are not numbered. Sections
with class unnumbered will never be numbered, even if --num-
ber-sections is specified.

--number-offset=NUMBER[,NUMBER,...]
Offsets for section heading numbers. The first number is added
to the section number for level-1 headings, the second for
level-2 headings, and so on. So, for example, if you want the
first level-1 heading in your document to be numbered "6" in-
stead of "1", specify --number-offset=5. If your document
starts with a level-2 heading which you want to be numbered
"1.5", specify --number-offset=1,4. --number-offset only di-
rectly affects the number of the first section heading in a doc-
ument; subsequent numbers increment in the normal way. Implies
--number-sections. Currently this feature only affects HTML and
Docx output.

--listings[=true|false]
*Deprecated, use --syntax-highlighting=idiomatic or --syn-
tax-highlighting=default instead.

Use the listings package for LaTeX code blocks. The package
does not support multi-byte encoding for source code. To handle
UTF-8 you would need to use a custom template. This issue is
fully documented here: Encoding issue with the listings package.

-i, --incremental[=true|false]
Make list items in slide shows display incrementally (one by
one). The default is for lists to be displayed all at once.

--slide-level=NUMBER
Specifies that headings with the specified level create slides
(for beamer, revealjs, pptx, s5, slidy, slideous, dzslides).
Headings above this level in the hierarchy are used to divide
the slide show into sections; headings below this level create
subheads within a slide. Valid values are 0-6. If a slide
level of 0 is specified, slides will not be split automatically
on headings, and horizontal rules must be used to indicate slide
boundaries. If a slide level is not specified explicitly, the
slide level will be set automatically based on the contents of
the document; see Structuring the slide show.

--section-divs[=true|false]
Wrap sections in <section> tags (or <div> tags for html4), and
attach identifiers to the enclosing <section> (or <div>) rather
than the heading itself (see Heading identifiers, below). This
option only affects HTML output (and does not affect HTML slide
formats).

--email-obfuscation=none|javascript|references
Specify a method for obfuscating mailto: links in HTML docu-
ments. none leaves mailto: links as they are. javascript ob-
fuscates them using JavaScript. references obfuscates them by
printing their letters as decimal or hexadecimal character ref-
erences. The default is none.

--id-prefix=STRING
Specify a prefix to be added to all identifiers and internal
links in HTML and DocBook output, and to footnote numbers in
Markdown and Haddock output. This is useful for preventing du-
plicate identifiers when generating fragments to be included in
other pages.

-T STRING, --title-prefix=STRING
Specify STRING as a prefix at the beginning of the title that
appears in the HTML header (but not in the title as it appears
at the beginning of the HTML body). Implies --standalone.

-c URL, --css=URL
Link to a CSS style sheet. This option can be used repeatedly
to include multiple files. They will be included in the order
specified. This option only affects HTML (including HTML slide
shows) and EPUB output. It should be used together with
-s/--standalone, because the link to the stylesheet goes in the
document header.

A stylesheet is required for generating EPUB. If none is pro-
vided using this option (or the css or stylesheet metadata
fields), pandoc will look for a file epub.css in the user data
directory (see --data-dir). If it is not found there, sensible
defaults will be used.

--reference-doc=FILE|URL
Use the specified file as a style reference in producing a docx
or ODT file.

Docx For best results, the reference docx should be a modified
version of a docx file produced using pandoc. The con-
tents of the reference docx are ignored, but its
stylesheets and document properties (including margins,
page size, header, and footer) are used in the new docx.
If no reference docx is specified on the command line,
pandoc will look for a file reference.docx in the user
data directory (see --data-dir). If this is not found
either, sensible defaults will be used.

To produce a custom reference.docx, first get a copy of
the default reference.docx: pandoc -o custom-refer-
ence.docx --print-default-data-file reference.docx. Then
open custom-reference.docx in Word, modify the styles as
you wish, and save the file. For best results, do not
make changes to this file other than modifying the styles
used by pandoc:

Paragraph styles:

• Normal

• Body Text

• First Paragraph

• Compact

• Title

• Subtitle

• Author

• Date

• Abstract

• AbstractTitle

• Bibliography

• Heading 1

• Heading 2

• Heading 3

• Heading 4

• Heading 5

• Heading 6

• Heading 7

• Heading 8

• Heading 9

• Block Text [for block quotes]

• Footnote Block Text [for block quotes in footnotes]

• Source Code

• Footnote Text

• Definition Term

• Definition

• Caption

• Table Caption

• Image Caption

• Figure

• Captioned Figure

• TOC Heading

Character styles:

• Default Paragraph Font

• Verbatim Char

• Footnote Reference

• Hyperlink

• Section Number

Table style:

• Table

ODT For best results, the reference ODT should be a modified
version of an ODT produced using pandoc. The contents of
the reference ODT are ignored, but its stylesheets are
used in the new ODT. If no reference ODT is specified on
the command line, pandoc will look for a file refer-
ence.odt in the user data directory (see --data-dir). If
this is not found either, sensible defaults will be used.

To produce a custom reference.odt, first get a copy of
the default reference.odt: pandoc -o custom-reference.odt
--print-default-data-file reference.odt. Then open cus-
tom-reference.odt in LibreOffice, modify the styles as
you wish, and save the file.

PowerPoint
Templates included with Microsoft PowerPoint 2013 (either
with .pptx or .potx extension) are known to work, as are
most templates derived from these.

The specific requirement is that the template should con-
tain layouts with the following names (as seen within
PowerPoint):

• Title Slide

• Title and Content

• Section Header

• Two Content

• Comparison

• Content with Caption

• Blank

For each name, the first layout found with that name will
be used. If no layout is found with one of the names,
pandoc will output a warning and use the layout with that
name from the default reference doc instead. (How these
layouts are used is described in PowerPoint layout
choice.)

All templates included with a recent version of MS Power-
Point will fit these criteria. (You can click on Layout
under the Home menu to check.)

You can also modify the default reference.pptx: first run
pandoc -o custom-reference.pptx --print-default-data-file
reference.pptx, and then modify custom-reference.pptx in
MS PowerPoint (pandoc will use the layouts with the names
listed above).

--split-level=NUMBER
Specify the heading level at which to split an EPUB or chunked
HTML document into separate files. The default is to split into
chapters at level-1 headings. In the case of EPUB, this option
only affects the internal composition of the EPUB, not the way
chapters and sections are displayed to users. Some readers may
be slow if the chapter files are too large, so for large docu-
ments with few level-1 headings, one might want to use a chapter
level of 2 or 3. For chunked HTML, this option determines how
much content goes in each "chunk."

--chunk-template=PATHTEMPLATE
Specify a template for the filenames in a chunkedhtml document.
In the template, %n will be replaced by the chunk number (padded
with leading 0s to 3 digits), %s with the section number of the
chunk, %h with the heading text (with formatting removed), %i
with the section identifier. For example, %section-%s-%i.html
might be resolved to section-1.1-introduction.html. The charac-
ters / and \ are not allowed in chunk templates and will be ig-
nored. The default is %s-%i.html.

--epub-chapter-level=NUMBER
Deprecated synonym for --split-level.

--epub-cover-image=FILE
Use the specified image as the EPUB cover. It is recommended
that the image be less than 1000px in width and height. Note
that in a Markdown source document you can also specify
cover-image in a YAML metadata block (see EPUB Metadata, below).

--epub-title-page=true|false
Determines whether a the title page is included in the EPUB (de-
fault is true).

--epub-metadata=FILE
Look in the specified XML file for metadata for the EPUB. The
file should contain a series of Dublin Core elements. For exam-
ple:

<dc:rights>Creative Commons</dc:rights>
<dc:language>es-AR</dc:language>

By default, pandoc will include the following metadata elements:
<dc:title> (from the document title), <dc:creator> (from the
document authors), <dc:date> (from the document date, which
should be in ISO 8601 format), <dc:language> (from the lang
variable, or, if is not set, the locale), and <dc:identifier
id="BookId"> (a randomly generated UUID). Any of these may be
overridden by elements in the metadata file.

Note: if the source document is Markdown, a YAML metadata block
in the document can be used instead. See below under EPUB Meta-
data.

--epub-embed-font=FILE
Embed the specified font in the EPUB. This option can be re-
peated to embed multiple fonts. Wildcards can also be used: for
example, DejaVuSans-*.ttf. However, if you use wildcards on the
command line, be sure to escape them or put the whole filename
in single quotes, to prevent them from being interpreted by the
shell. To use the embedded fonts, you will need to add declara-
tions like the following to your CSS (see --css):

@font-face {
font-family: DejaVuSans;
font-style: normal;
font-weight: normal;
src:url("../fonts/DejaVuSans-Regular.ttf");
}
@font-face {
font-family: DejaVuSans;
font-style: normal;
font-weight: bold;
src:url("../fonts/DejaVuSans-Bold.ttf");
}
@font-face {
font-family: DejaVuSans;
font-style: italic;
font-weight: normal;
src:url("../fonts/DejaVuSans-Oblique.ttf");
}
@font-face {
font-family: DejaVuSans;
font-style: italic;
font-weight: bold;
src:url("../fonts/DejaVuSans-BoldOblique.ttf");
}
body { font-family: "DejaVuSans"; }

--epub-subdirectory=DIRNAME
Specify the subdirectory in the OCF container that is to hold
the EPUB-specific contents. The default is EPUB. To put the
EPUB contents in the top level, use an empty string.

--ipynb-output=all|none|best
Determines how ipynb output cells are treated. all means that
all of the data formats included in the original are preserved.
none means that the contents of data cells are omitted. best
causes pandoc to try to pick the richest data block in each out-
put cell that is compatible with the output format. The default
is best.

--pdf-engine=PROGRAM
Use the specified engine when producing PDF output. Valid val-
ues are pdflatex, lualatex, xelatex, latexmk, tectonic, wkhtml-
topdf, weasyprint, pagedjs-cli, prince, context, groff, pdfroff,
and typst. If the engine is not in your PATH, the full path of
the engine may be specified here. If this option is not speci-
fied, pandoc uses the following defaults depending on the output
format specified using -t/--to:

• -t latex or none: pdflatex (other options: xelatex, lualatex,
tectonic, latexmk)

• -t context: context

• -t html: weasyprint (other options: prince, wkhtmltopdf,
pagedjs-cli; see print-css.rocks for a good introduction to
PDF generation from HTML/CSS)

• -t ms: pdfroff

• -t typst: typst

This option is normally intended to be used when a PDF file is
specified as -o/--output. However, it may still have an effect
when other output formats are requested. For example, ms output
will include .pdfhref macros only if a --pdf-engine is selected,
and the macros will be differently encoded depending on whether
groff or pdfroff is specified.

--pdf-engine-opt=STRING
Use the given string as a command-line argument to the pdf-en-
gine. For example, to use a persistent directory foo for la-
texmk's auxiliary files, use --pdf-engine-opt=-outdir=foo. Note
that no check for duplicate options is done.

Citation rendering
-C, --citeproc
Process the citations in the file, replacing them with rendered
citations and adding a bibliography. Citation processing will
not take place unless bibliographic data is supplied, either
through an external file specified using the --bibliography op-
tion or the bibliography field in metadata, or via a references
section in metadata containing a list of citations in CSL YAML
format with Markdown formatting. The style is controlled by a
CSL stylesheet specified using the --csl option or the csl field
in metadata. (If no stylesheet is specified, the chicago-au-
thor-date style will be used by default.) The citation process-
ing transformation may be applied before or after filters or Lua
filters (see --filter, --lua-filter): these transformations are
applied in the order they appear on the command line. For more
information, see the section on Citations.

Note: if this option is specified, the citations extension will
be disabled automatically in the writer, to ensure that the
citeproc-generated citations will be rendered instead of the
format's own citation syntax.

--bibliography=FILE
Set the bibliography field in the document's metadata to FILE,
overriding any value set in the metadata. If you supply this
argument multiple times, each FILE will be added to bibliogra-
phy. If FILE is a URL, it will be fetched via HTTP. If FILE is
not found relative to the working directory, it will be sought
in the resource path (see --resource-path).

--csl=FILE
Set the csl field in the document's metadata to FILE, overriding
any value set in the metadata. (This is equivalent to --meta-
data csl=FILE.) If FILE is a URL, it will be fetched via HTTP.
If FILE is not found relative to the working directory, it will
be sought in the resource path (see --resource-path) and finally
in the csl subdirectory of the pandoc user data directory.

--citation-abbreviations=FILE
Set the citation-abbreviations field in the document's metadata
to FILE, overriding any value set in the metadata. (This is
equivalent to --metadata citation-abbreviations=FILE.) If FILE
is a URL, it will be fetched via HTTP. If FILE is not found
relative to the working directory, it will be sought in the re-
source path (see --resource-path) and finally in the csl subdi-
rectory of the pandoc user data directory.

--natbib
Use natbib for citations in LaTeX output. This option is not
for use with the --citeproc option or with PDF output. It is
intended for use in producing a LaTeX file that can be processed
with bibtex.

--biblatex
Use biblatex for citations in LaTeX output. This option is not
for use with the --citeproc option or with PDF output. It is
intended for use in producing a LaTeX file that can be processed
with bibtex or biber.

Math rendering in HTML
The default is to render TeX math as far as possible using Unicode
characters. Formulas are put inside a span with class="math", so that
they may be styled differently from the surrounding text if needed.
However, this gives acceptable results only for basic math, usually you
will want to use --mathjax or another of the following options.

--mathjax[=URL]
Use MathJax to display embedded TeX math in HTML output. TeX
math will be put between $...$ (for inline math) or \[...\]
(for display math) and wrapped in <span> tags with class math.
Then the MathJax JavaScript will render it. The URL should
point to the MathJax.js load script. If a URL is not provided,
a link to the Cloudflare CDN will be inserted.

--mathml
Convert TeX math to MathML (in epub3, docbook4, docbook5, jats,
html4 and html5). This is the default in odt output. MathML is
supported natively by the main web browsers and select e-book
readers.

--webtex[=URL]
Convert TeX formulas to <img> tags that link to an external
script that converts formulas to images. The formula will be
URL-encoded and concatenated with the URL provided. For SVG im-
ages you can for example use --webtex https://la-
tex.codecogs.com/svg.latex?. If no URL is specified, the
CodeCogs URL generating PNGs will be used (https://la-
tex.codecogs.com/png.latex?). Note: the --webtex option will
affect Markdown output as well as HTML, which is useful if
you're targeting a version of Markdown without native math sup-
port.

--katex[=URL]
Use KaTeX to display embedded TeX math in HTML output. The URL
is the base URL for the KaTeX library. That directory should
contain a katex.min.js and a katex.min.css file. If a URL is
not provided, a link to the KaTeX CDN will be inserted.

--gladtex
Enclose TeX math in <eq> tags in HTML output. The resulting
HTML can then be processed by GladTeX to produce SVG images of
the typeset formulas and an HTML file with these images embed-
ded.

pandoc -s --gladtex input.md -o myfile.htex
gladtex -d image_dir myfile.htex
# produces myfile.html and images in image_dir

Options for wrapper scripts
--dump-args[=true|false]
Print information about command-line arguments to stdout, then
exit. This option is intended primarily for use in wrapper
scripts. The first line of output contains the name of the out-
put file specified with the -o option, or - (for stdout) if no
output file was specified. The remaining lines contain the com-
mand-line arguments, one per line, in the order they appear.
These do not include regular pandoc options and their arguments,
but do include any options appearing after a -- separator at the
end of the line.

--ignore-args[=true|false]
Ignore command-line arguments (for use in wrapper scripts).
Regular pandoc options are not ignored. Thus, for example,

pandoc --ignore-args -o foo.html -s foo.txt -- -e latin1

is equivalent to

pandoc -o foo.html -s

EXIT CODES
If pandoc completes successfully, it will return exit code 0. Nonzero
exit codes have the following meanings:

Code Error
------ -------------------------------------
1 PandocIOError
3 PandocFailOnWarningError
4 PandocAppError
5 PandocTemplateError
6 PandocOptionError
21 PandocUnknownReaderError
22 PandocUnknownWriterError
23 PandocUnsupportedExtensionError
24 PandocCiteprocError
25 PandocBibliographyError
31 PandocEpubSubdirectoryError
43 PandocPDFError
44 PandocXMLError
47 PandocPDFProgramNotFoundError
61 PandocHttpError
62 PandocShouldNeverHappenError
63 PandocSomeError
64 PandocParseError
66 PandocMakePDFError
67 PandocSyntaxMapError
83 PandocFilterError
84 PandocLuaError
89 PandocNoScriptingEngine
91 PandocMacroLoop
92 PandocUTF8DecodingError
93 PandocIpynbDecodingError
94 PandocUnsupportedCharsetError
95 PandocInputNotTextError
97 PandocCouldNotFindDataFileError
98 PandocCouldNotFindMetadataFileError
99 PandocResourceNotFound

DEFAULTS FILES
The --defaults option may be used to specify a package of options, in
the form of a YAML file.

Fields that are omitted will just have their regular default values.
So a defaults file can be as simple as one line:

verbosity: INFO

In fields that expect a file path (or list of file paths), the follow-
ing syntax may be used to interpolate environment variables:

csl: ${HOME}/mycsldir/special.csl

${USERDATA} may also be used; this will always resolve to the user data
directory that is current when the defaults file is parsed, regardless
of the setting of the environment variable USERDATA.

${.} will resolve to the directory containing the defaults file itself.
This allows you to refer to resources contained in that directory:

epub-cover-image: ${.}/cover.jpg
epub-metadata: ${.}/meta.xml
resource-path:
- . # the working directory from which pandoc is run
- ${.}/images # the images subdirectory of the directory
# containing this defaults file

This environment variable interpolation syntax only works in fields
that expect file paths.

Defaults files can be placed in the defaults subdirectory of the user
data directory and used from any directory. For example, one could
create a file specifying defaults for writing letters, save it as let-
ter.yaml in the defaults subdirectory of the user data directory, and
then invoke these defaults from any directory using pandoc --defaults
letter or pandoc -dletter.

When multiple defaults are used, their contents will be combined.

Note that, where command-line arguments may be repeated (--meta-
data-file, --css, --include-in-header, --include-before-body, --in-
clude-after-body, --variable, --metadata, --syntax-definition), the
values specified on the command line will combine with values specified
in the defaults file, rather than replacing them.

The following tables show the mapping between the command line and de-
faults file entries.

command line defaults file
--------------------------------- ----------------------------------
foo.md input-file: foo.md

foo.md bar.md input-files:
- foo.md
- bar.md

The value of input-files may be left empty to indicate input from
stdin, and it can be an empty sequence [] for no input.

General options
command line defaults file
----------------------------------- --------------------------------------
--from markdown+emoji from: markdown+emoji

reader: markdown+emoji

--to markdown+hard_line_breaks to: markdown+hard_line_breaks

writer: markdown+hard_line_breaks

--output foo.pdf output-file: foo.pdf

--output - output-file:

--data-dir dir data-dir: dir

--defaults file defaults:
- file

--verbose verbosity: INFO

--quiet verbosity: ERROR

--fail-if-warnings fail-if-warnings: true

--sandbox sandbox: true

--log=FILE log-file: FILE

Options specified in a defaults file itself always have priority over
those in another file included with a defaults: entry.

verbosity can have the values ERROR, WARNING, or INFO.

Reader options
command line defaults file
------------------------------------- ------------------------------------
--shift-heading-level-by -1 shift-heading-level-by: -1

--indented-code-classes python indented-code-classes:
- python

--default-image-extension ".jpg" default-image-extension: '.jpg'

--file-scope file-scope: true

--citeproc \ filters:
--lua-filter count-words.lua \ - citeproc
--filter special.lua - count-words.lua
- type: json
path: special.lua

--metadata key=value \ metadata:
--metadata key2 key: value
key2: true

--metadata-file meta.yaml metadata-files:
- meta.yaml

metadata-file: meta.yaml

--preserve-tabs preserve-tabs: true

--tab-stop 8 tab-stop: 8

--track-changes accept track-changes: accept

--extract-media dir extract-media: dir

--abbreviations abbrevs.txt abbreviations: abbrevs.txt

--trace trace: true

Metadata values specified in a defaults file are parsed as literal
string text, not Markdown.

Filters will be assumed to be Lua filters if they have the .lua exten-
sion, and JSON filters otherwise. But the filter type can also be
specified explicitly, as shown. Filters are run in the order speci-
fied. To include the built-in citeproc filter, use either citeproc or
{type: citeproc}.

General writer options
command line defaults file
----------------------------------- --------------------------------------
--standalone standalone: true

--template letter template: letter

--variable key=val \ variables:
--variable key2 key: val
key2: true

--eol nl eol: nl

--dpi 300 dpi: 300

--wrap 60 wrap: 60

--columns 72 columns: 72

--table-of-contents table-of-contents: true

--toc toc: true

--toc-depth 3 toc-depth: 3

--strip-comments strip-comments: true

--no-highlight syntax-highlighting: 'none'

--syntax-highlighting kate syntax-highlighting: kate

--syntax-definition mylang.xml syntax-definitions:
- mylang.xml

syntax-definition: mylang.xml

--include-in-header inc.tex include-in-header:
- inc.tex

--include-before-body inc.tex include-before-body:
- inc.tex

--include-after-body inc.tex include-after-body:
- inc.tex

--resource-path .:foo resource-path: ['.','foo']

--request-header foo:bar request-headers:
- ["User-Agent", "Mozilla/5.0"]

--no-check-certificate no-check-certificate: true

Options affecting specific writers
command line defaults file
------------------------------------- ------------------------------------
--self-contained self-contained: true

--link-images link-images: true

--html-q-tags html-q-tags: true

--ascii ascii: true

--reference-links reference-links: true

--reference-location block reference-location: block

--figure-caption-position=above figure-caption-position: above

--table-caption-position=below table-caption-position: below

--markdown-headings atx markdown-headings: atx

--list-tables list-tables: true

--top-level-division chapter top-level-division: chapter

--number-sections number-sections: true

--number-offset=1,4 number-offset: \[1,4\]

--listings listings: true

--list-of-figures list-of-figures: true

--lof lof: true

--list-of-tables list-of-tables: true

--lot lot: true

--incremental incremental: true

--slide-level 2 slide-level: 2

--section-divs section-divs: true

--email-obfuscation references email-obfuscation: references

--id-prefix ch1 identifier-prefix: ch1

--title-prefix MySite title-prefix: MySite

--css styles/screen.css \ css:
--css styles/special.css - styles/screen.css
- styles/special.css

--reference-doc my.docx reference-doc: my.docx

--epub-cover-image cover.jpg epub-cover-image: cover.jpg

--epub-title-page=false epub-title-page: false

--epub-metadata meta.xml epub-metadata: meta.xml

--epub-embed-font special.otf \ epub-fonts:
--epub-embed-font headline.otf - special.otf
- headline.otf

--split-level 2 split-level: 2

--chunk-template="%i.html" chunk-template: "%i.html"

--epub-subdirectory="" epub-subdirectory: ''

--ipynb-output best ipynb-output: best

--pdf-engine xelatex pdf-engine: xelatex

--pdf-engine-opt=--shell-escape pdf-engine-opts:
- '-shell-escape'

pdf-engine-opt: '-shell-escape'

Citation rendering
command line defaults file
------------------------------------- ------------------------------------
--citeproc citeproc: true

--bibliography logic.bib bibliography: logic.bib

--csl ieee.csl csl: ieee.csl

--citation-abbreviations ab.json citation-abbreviations: ab.json

--natbib cite-method: natbib

--biblatex cite-method: biblatex

cite-method can be citeproc, natbib, or biblatex. This only affects
LaTeX output. If you want to use citeproc to format citations, you
should also set `citeproc: true'.

If you need control over when the citeproc processing is done relative
to other filters, you should instead use citeproc in the list of fil-
ters (see Reader options).

Math rendering in HTML
command line defaults file
--------------------------------- ----------------------------------
--mathjax html-math-method:
method: mathjax

--mathml html-math-method:
method: mathml

--webtex html-math-method:
method: webtex

--katex html-math-method:
method: katex

--gladtex html-math-method:
method: gladtex

In addition to the values listed above, method can have the value
plain.

If the command line option accepts a URL argument, an url: field can be
added to html-math-method:.

Options for wrapper scripts
command line defaults file
--------------------------------- ----------------------------------
--dump-args dump-args: true

--ignore-args ignore-args: true

TEMPLATES
When the -s/--standalone option is used, pandoc uses a template to add
header and footer material that is needed for a self-standing document.
To see the default template that is used, just type

pandoc -D *FORMAT*

where FORMAT is the name of the output format. A custom template can
be specified using the --template option. You can also override the
system default templates for a given output format FORMAT by putting a
file templates/default.*FORMAT* in the user data directory (see
--data-dir, above). Exceptions:

• For odt output, customize the default.opendocument template.

• For docx output, customize the default.openxml template.

• For pdf output, customize the default.latex template (or the de-
fault.context template, if you use -t context, or the default.ms tem-
plate, if you use -t ms, or the default.html template, if you use -t
html).

• pptx has no template.

Note that docx, odt, and pptx output can also be customized using
--reference-doc. Use a reference doc to adjust the styles in your doc-
ument; use a template to handle variable interpolation and customize
the presentation of metadata, the position of the table of contents,
boilerplate text, etc.

Templates contain variables, which allow for the inclusion of arbitrary
information at any point in the file. They may be set at the command
line using the -V/--variable option. If a variable is not set, pandoc
will look for the key in the document's metadata, which can be set us-
ing either YAML metadata blocks or with the -M/--metadata option. In
addition, some variables are given default values by pandoc. See Vari-
ables below for a list of variables used in pandoc's default templates.

If you use custom templates, you may need to revise them as pandoc
changes. We recommend tracking the changes in the default templates,
and modifying your custom templates accordingly. An easy way to do
this is to fork the pandoc-templates repository and merge in changes
after each pandoc release.

Template syntax
Comments
Anything between the sequence $-- and the end of the line will be
treated as a comment and omitted from the output.

Delimiters
To mark variables and control structures in the template, either $...$
or ${...} may be used as delimiters. The styles may also be mixed in
the same template, but the opening and closing delimiter must match in
each case. The opening delimiter may be followed by one or more spaces
or tabs, which will be ignored. The closing delimiter may be preceded
by one or more spaces or tabs, which will be ignored.

To include a literal $ in the document, use $$.

Interpolated variables
A slot for an interpolated variable is a variable name surrounded by
matched delimiters. Variable names must begin with a letter and can
contain letters, numbers, _, -, and .. The keywords it, if, else, en-
dif, for, sep, and endfor may not be used as variable names. Examples:

$foo$
$foo.bar.baz$
$foo_bar.baz-bim$
$ foo $
${foo}
${foo.bar.baz}
${foo_bar.baz-bim}
${ foo }

Variable names with periods are used to get at structured variable val-
ues. So, for example, employee.salary will return the value of the
salary field of the object that is the value of the employee field.

• If the value of the variable is a simple value, it will be rendered
verbatim. (Note that no escaping is done; the assumption is that the
calling program will escape the strings appropriately for the output
format.)

• If the value is a list, the values will be concatenated.

• If the value is a map, the string true will be rendered.

• Every other value will be rendered as the empty string.

Conditionals
A conditional begins with if(variable) (enclosed in matched delimiters)
and ends with endif (enclosed in matched delimiters). It may option-
ally contain an else (enclosed in matched delimiters). The if section
is used if variable has a true value, otherwise the else section is
used (if present). The following values count as true:

• any map

• any array containing at least one true value

• any nonempty string

• boolean True

Note that in YAML metadata (and metadata specified on the command line
using -M/--metadata), unquoted true and false will be interpreted as
Boolean values. But a variable specified on the command line using
-V/--variable will always be given a string value. Hence a conditional
if(foo) will be triggered if you use -V foo=false, but not if you use
-M foo=false.

Examples:

$if(foo)$bar$endif$

$if(foo)$
$foo$
$endif$

$if(foo)$
part one
$else$
part two
$endif$

${if(foo)}bar${endif}

${if(foo)}
${foo}
${endif}

${if(foo)}
${ foo.bar }
${else}
no foo!
${endif}

The keyword elseif may be used to simplify complex nested conditionals:

$if(foo)$
XXX
$elseif(bar)$
YYY
$else$
ZZZ
$endif$

For loops
A for loop begins with for(variable) (enclosed in matched delimiters)
and ends with endfor (enclosed in matched delimiters).

• If variable is an array, the material inside the loop will be evalu-
ated repeatedly, with variable being set to each value of the array
in turn, and concatenated.

• If variable is a map, the material inside will be set to the map.

• If the value of the associated variable is not an array or a map, a
single iteration will be performed on its value.

Examples:

$for(foo)$$foo$$sep$, $endfor$

$for(foo)$
- $foo.last$, $foo.first$
$endfor$

${ for(foo.bar) }
- ${ foo.bar.last }, ${ foo.bar.first }
${ endfor }

$for(mymap)$
$it.name$: $it.office$
$endfor$

You may optionally specify a separator between consecutive values using
sep (enclosed in matched delimiters). The material between sep and the
endfor is the separator.

${ for(foo) }${ foo }${ sep }, ${ endfor }

Instead of using variable inside the loop, the special anaphoric key-
word it may be used.

${ for(foo.bar) }
- ${ it.last }, ${ it.first }
${ endfor }

Partials
Partials (subtemplates stored in different files) may be included by
using the name of the partial, followed by (), for example:

${ styles() }

Partials will be sought in the directory containing the main template.
The file name will be assumed to have the same extension as the main
template if it lacks an extension. When calling the partial, the full
name including file extension can also be used:

${ styles.html() }

(If a partial is not found in the directory of the template and the
template path is given as a relative path, it will also be sought in
the templates subdirectory of the user data directory.)

Partials may optionally be applied to variables using a colon:

${ date:fancy() }

${ articles:bibentry() }

If articles is an array, this will iterate over its values, applying
the partial bibentry() to each one. So the second example above is
equivalent to

${ for(articles) }
${ it:bibentry() }
${ endfor }

Note that the anaphoric keyword it must be used when iterating over
partials. In the above examples, the bibentry partial should contain
it.title (and so on) instead of articles.title.

Final newlines are omitted from included partials.

Partials may include other partials.

A separator between values of an array may be specified in square
brackets, immediately after the variable name or partial:

${months[, ]}

${articles:bibentry()[; ]}

The separator in this case is literal and (unlike with sep in an ex-
plicit for loop) cannot contain interpolated variables or other tem-
plate directives.

Nesting
To ensure that content is "nested," that is, subsequent lines indented,
use the ^ directive:

$item.number$ $^$$item.description$ ($item.price$)

In this example, if item.description has multiple lines, they will all
be indented to line up with the first line:

00123 A fine bottle of 18-year old
Oban whiskey. ($148)

To nest multiple lines to the same level, align them with the ^ direc-
tive in the template. For example:

$item.number$ $^$$item.description$ ($item.price$)
(Available til $item.sellby$.)

will produce

00123 A fine bottle of 18-year old
Oban whiskey. ($148)
(Available til March 30, 2020.)

If a variable occurs by itself on a line, preceded by whitespace and
not followed by further text or directives on the same line, and the
variable's value contains multiple lines, it will be nested automati-
cally.

Breakable spaces
Normally, spaces in the template itself (as opposed to values of the
interpolated variables) are not breakable, but they can be made break-
able in part of the template by using the ~ keyword (ended with another
~).

$~$This long line may break if the document is rendered
with a short line length.$~$

Pipes
A pipe transforms the value of a variable or partial. Pipes are speci-
fied using a slash (/) between the variable name (or partial) and the
pipe name. Example:

$for(name)$
$name/uppercase$
$endfor$

$for(metadata/pairs)$
- $it.key$: $it.value$
$endfor$

$employee:name()/uppercase$

Pipes may be chained:

$for(employees/pairs)$
$it.key/alpha/uppercase$. $it.name$
$endfor$

Some pipes take parameters:

|----------------------|------------|
$for(employee)$
$it.name.first/uppercase/left 20 "| "$$it.name.salary/right 10 " | " " |"$
$endfor$
|----------------------|------------|

Currently the following pipes are predefined:

• pairs: Converts a map or array to an array of maps, each with key and
value fields. If the original value was an array, the key will be
the array index, starting with 1.

• uppercase: Converts text to uppercase.

• lowercase: Converts text to lowercase.

• length: Returns the length of the value: number of characters for a
textual value, number of elements for a map or array.

• reverse: Reverses a textual value or array, and has no effect on
other values.

• first: Returns the first value of an array, if applied to a non-empty
array; otherwise returns the original value.

• last: Returns the last value of an array, if applied to a non-empty
array; otherwise returns the original value.

• rest: Returns all but the first value of an array, if applied to a
non-empty array; otherwise returns the original value.

• allbutlast: Returns all but the last value of an array, if applied to
a non-empty array; otherwise returns the original value.

• chomp: Removes trailing newlines (and breakable space).

• nowrap: Disables line wrapping on breakable spaces.

• alpha: Converts textual values that can be read as an integer into
lowercase alphabetic characters a..z (mod 26). This can be used to
get lettered enumeration from array indices. To get uppercase let-
ters, chain with uppercase.

• roman: Converts textual values that can be read as an integer into
lowercase roman numerals. This can be used to get lettered enumera-
tion from array indices. To get uppercase roman, chain with upper-
case.

• left n "leftborder" "rightborder": Renders a textual value in a block
of width n, aligned to the left, with an optional left and right bor-
der. Has no effect on other values. This can be used to align mate-
rial in tables. Widths are positive integers indicating the number
of characters. Borders are strings inside double quotes; literal "
and \ characters must be backslash-escaped.

• right n "leftborder" "rightborder": Renders a textual value in a
block of width n, aligned to the right, and has no effect on other
values.

• center n "leftborder" "rightborder": Renders a textual value in a
block of width n, aligned to the center, and has no effect on other
values.

Variables
Metadata variables
title, author, date
allow identification of basic aspects of the document. Included
in PDF metadata through LaTeX and ConTeXt. These can be set
through a pandoc title block, which allows for multiple authors,
or through a YAML metadata block:

---
author:
- Aristotle
- Peter Abelard
...
Note that if you just want to set PDF or HTML metadata,
without including a title block in the document itself,
you can set the title-meta, author-meta, and date-meta
variables. (By default these are set automatically,
based on title, author, and date.) The page title in
HTML is set by pagetitle, which is equal to title by de-
fault.

subtitle
document subtitle, included in HTML, EPUB, LaTeX, ConTeXt, and
docx documents

abstract
document summary, included in HTML, LaTeX, ConTeXt, AsciiDoc,
and docx documents

abstract-title
title of abstract, currently used only in HTML, EPUB, docx, and
Typst. This will be set automatically to a localized value, de-
pending on lang, but can be manually overridden.

keywords
list of keywords to be included in HTML, PDF, ODT, pptx, docx
and AsciiDoc metadata; repeat as for author, above

subject
document subject, included in ODT, PDF, docx, EPUB, and pptx
metadata

description
document description, included in ODT, docx and pptx metadata.
Some applications show this as Comments metadata.

category
document category, included in docx and pptx metadata

Additionally, any root-level string metadata, not included in ODT, docx
or pptx metadata is added as a custom property. The following YAML
metadata block for instance:

---
title: 'This is the title'
subtitle: "This is the subtitle"
author:
- Author One
- Author Two
description: |
This is a long
description.

It consists of two paragraphs
...

will include title, author and description as standard document proper-
ties and subtitle as a custom property when converting to docx, ODT or
pptx.

Language variables
lang identifies the main language of the document using IETF language
tags (following the BCP 47 standard), such as en or en-GB. The
Language subtag lookup tool can look up or verify these tags.
This affects most formats, and controls hyphenation in PDF out-
put when using LaTeX (through babel and polyglossia) or ConTeXt.
Use native pandoc Divs and Spans with the lang attribute to
switch the language:

---
lang: en-GB
...

Text in the main document language (British English).

::: {lang=fr-CA}
> Cette citation est crite en franais canadien.
:::

More text in English. ['Zitat auf Deutsch.']{lang=de}

dir the base script direction, either rtl (right-to-left) or ltr
(left-to-right).
For bidirectional documents, native pandoc spans and divs with
the dir attribute (value rtl or ltr) can be used to override the
base direction in some output formats. This may not always be
necessary if the final renderer (e.g. the browser, when generat-
ing HTML) supports the Unicode Bidirectional Algorithm. When
using LaTeX for bidirectional documents, only the xelatex engine
is fully supported (use --pdf-engine=xelatex).

Variables for HTML
document-css
Enables inclusion of most of the CSS in the styles.html partial
(have a look with pandoc --print-default-data-file=tem-
plates/styles.html). Unless you use --css, this variable is set
to true by default. You can disable it with e.g. pandoc -M doc-
ument-css=false.

mainfont
sets the CSS font-family property on the html element.

fontsize
sets the base CSS font-size, which you'd usually set to
e.g. 20px, but it also accepts pt (12pt = 16px in most
browsers).

fontcolor
sets the CSS color property on the html element.

linkcolor
sets the CSS color property on all links.

monofont
sets the CSS font-family property on code elements.

monobackgroundcolor
sets the CSS background-color property on code elements and adds
extra padding.

linestretch
sets the CSS line-height property on the html element, which is
preferred to be unitless.

maxwidth
sets the CSS max-width property (default is 36em).

backgroundcolor
sets the CSS background-color property on the html element.

margin-left, margin-right, margin-top, margin-bottom
sets the corresponding CSS padding properties on the body ele-
ment.

To override or extend some CSS for just one document, include for exam-
ple:

---
header-includes: |
<style>
blockquote {
font-style: italic;
}
tr.even {
background-color: #f0f0f0;
}
td, th {
padding: 0.5em 2em 0.5em 0.5em;
}
tbody {
border-bottom: none;
}
</style>
---

Variables for HTML math
classoption
when using --katex, you can render display math equations flush
left using YAML metadata or with -M classoption=fleqn.

Variables for HTML slides
These affect HTML output when producing slide shows with pandoc.

institute
author affiliations: can be a list when there are multiple au-
thors

revealjs-url
base URL for reveal.js documents (defaults to
https://unpkg.com/reveal.js@^5)

s5-url base URL for S5 documents (defaults to s5/default)

slidy-url
base URL for Slidy documents (defaults to
https://www.w3.org/Talks/Tools/Slidy2)

slideous-url
base URL for Slideous documents (defaults to slideous)

title-slide-attributes
additional attributes for the title slide of reveal.js slide
shows. See background in reveal.js, beamer, and pptx for an ex-
ample.

All reveal.js configuration options are available as variables. To
turn off boolean flags that default to true in reveal.js, use 0.

Variables for Beamer slides
These variables change the appearance of PDF slides using beamer.

aspectratio
slide aspect ratio (43 for 4:3 [default], 169 for 16:9, 1610 for
16:10, 149 for 14:9, 141 for 1.41:1, 54 for 5:4, 32 for 3:2)

beameroption
add extra beamer option with \setbeameroption{}

institute
author affiliations: can be a list when there are multiple au-
thors

logo logo image for slides

navigation
controls navigation symbols (default is empty for no navigation
symbols; other valid values are frame, vertical, and horizontal)

section-titles
enables "title pages" for new sections (default is true)

theme, colortheme, fonttheme, innertheme, outertheme
beamer themes

themeoptions, colorthemeoptions, fontthemeoptions, innerthemeoptions,
outerthemeoptions
options for LaTeX beamer themes (lists)

titlegraphic
image for title slide: can be a list

titlegraphicoptions
options for title slide image

shorttitle, shortsubtitle, shortauthor, shortinstitute, shortdate
some beamer themes use short versions of the title, subtitle,
author, institute, date

Variables for PowerPoint
These variables control the visual aspects of a slide show that are not
easily controlled via templates.

monofont
font to use for code.

Variables for LaTeX
Pandoc uses these variables when creating a PDF with a LaTeX engine.

Layout
block-headings
make \paragraph and \subparagraph (fourth- and fifth-level head-
ings, or fifth- and sixth-level with book classes) free-standing
rather than run-in; requires further formatting to distinguish
from \subsubsection (third- or fourth-level headings). Instead
of using this option, KOMA-Script can adjust headings more ex-
tensively:

---
documentclass: scrartcl
header-includes: |
\RedeclareSectionCommand[
beforeskip=-10pt plus -2pt minus -1pt,
afterskip=1sp plus -1sp minus 1sp,
font=\normalfont\itshape]{paragraph}
\RedeclareSectionCommand[
beforeskip=-10pt plus -2pt minus -1pt,
afterskip=1sp plus -1sp minus 1sp,
font=\normalfont\scshape,
indent=0pt]{subparagraph}
...

classoption
option for document class, e.g. oneside; repeat for multiple op-
tions:

---
classoption:
- twocolumn
- landscape
...

documentclass
document class: usually one of the standard classes, article,
book, and report; the KOMA-Script equivalents, scrartcl, scr-
book, and scrreprt, which default to smaller margins; or memoir

geometry
option for geometry package, e.g. margin=1in; repeat for multi-
ple options:

---
geometry:
- top=30mm
- left=20mm
- heightrounded
...

shorthands
Enable language-specific shorthands when loading babel. (By de-
fault, pandoc includes shorthands=off when loading babel, dis-
abling language-specific shorthands.)

hyperrefoptions
option for hyperref package, e.g. linktoc=all; repeat for multi-
ple options:

---
hyperrefoptions:
- linktoc=all
- pdfwindowui
- pdfpagemode=FullScreen
...

indent if true, pandoc will use document class settings for indentation
(the default LaTeX template otherwise removes indentation and
adds space between paragraphs)

linestretch
adjusts line spacing using the setspace package, e.g. 1.25, 1.5

margin-left, margin-right, margin-top, margin-bottom
sets margins if geometry is not used (otherwise geometry over-
rides these)

pagestyle
control \pagestyle{}: the default article class supports plain
(default), empty (no running heads or page numbers), and head-
ings (section titles in running heads)

papersize
paper size, e.g. letter, a4

secnumdepth
numbering depth for sections (with --number-sections option or
numbersections variable)

beamerarticle
produce an article from Beamer slides. Note: if you set this
variable, you must specify the beamer writer but use the default
LaTeX template: for example, pandoc -Vbeamerarticle -t beamer
--template default.latex.

handout
produce a handout version of Beamer slides (with overlays con-
densed into single slides)

csquotes
load csquotes package and use \enquote or \enquote* for quoted
text.

csquotesoptions
options to use for csquotes package (repeat for multiple op-
tions).

babeloptions
options to pass to the babel package (may be repeated for multi-
ple options). This defaults to provide=* if the main language
isn't a European language written with Latin or Cyrillic script
or Vietnamese. Most users will not need to adjust the default
setting.

Fonts
fontenc
allows font encoding to be specified through fontenc package
(with pdflatex); default is T1 (see LaTeX font encodings guide)

fontfamily
font package for use with pdflatex: TeX Live includes many op-
tions, documented in the LaTeX Font Catalogue. The default is
Latin Modern.

fontfamilyoptions
options for package used as fontfamily; repeat for multiple op-
tions. For example, to use the Libertine font with proportional
lowercase (old-style) figures through the libertinus package:

---
fontfamily: libertinus
fontfamilyoptions:
- osf
- p
...

fontsize
font size for body text. The standard classes allow 10pt, 11pt,
and 12pt. To use another size, set documentclass to one of the
KOMA-Script classes, such as scrartcl or scrbook.

mainfont, sansfont, monofont, mathfont, CJKmainfont, CJKsansfont, CJK-
monofont
font families for use with xelatex or lualatex: take the name of
any system font, using the fontspec package. CJKmainfont uses
the xecjk package if xelatex is used, or the luatexja package if
lualatex is used.

mainfontoptions, sansfontoptions, monofontoptions, mathfontoptions,
CJKoptions, luatexjapresetoptions
options to use with mainfont, sansfont, monofont, mathfont, CJK-
mainfont in xelatex and lualatex. Allow for any choices avail-
able through fontspec; repeat for multiple options. For exam-
ple, to use the TeX Gyre version of Palatino with lowercase fig-
ures:

---
mainfont: TeX Gyre Pagella
mainfontoptions:
- Numbers=Lowercase
- Numbers=Proportional
...

mainfontfallback, sansfontfallback, monofontfallback
fonts to try if a glyph isn't found in mainfont, sansfont, or
monofont respectively. These are lists. The font name must be
followed by a colon and optionally a set of options, for exam-
ple:

---
mainfontfallback:
- "FreeSans:"
- "NotoColorEmoji:mode=harf"
...
Font fallbacks currently only work with lualatex.

babelfonts
a map of Babel language names (e.g. chinese) to the font to be
used with the language:

---
babelfonts:
chinese-hant: "Noto Serif CJK TC"
russian: "Noto Serif"
...

microtypeoptions
options to pass to the microtype package

Links
colorlinks
add color to link text; automatically enabled if any of link-
color, filecolor, citecolor, urlcolor, or toccolor are set

boxlinks
add visible box around links (has no effect if colorlinks is
set)

linkcolor, filecolor, citecolor, urlcolor, toccolor
color for internal links, external links, citation links, linked
URLs, and links in table of contents, respectively: uses options
allowed by xcolor, including the dvipsnames, svgnames, and
x11names lists

links-as-notes
causes links to be printed as footnotes

urlstyle
style for URLs (e.g., tt, rm, sf, and, the default, same)

Front matter
lof, lot
include list of figures, list of tables (can also be set using
--lof/--list-of-figures, --lot/--list-of-tables)

thanks contents of acknowledgments footnote after document title

toc include table of contents (can also be set using --toc/--ta-
ble-of-contents)

toc-depth
level of section to include in table of contents

BibLaTeX Bibliographies
These variables function when using BibLaTeX for citation rendering.

biblatexoptions
list of options for biblatex

biblio-style
bibliography style, when used with --natbib and --biblatex

biblio-title
bibliography title, when used with --natbib and --biblatex

bibliography
bibliography to use for resolving references

natbiboptions
list of options for natbib

Other
pdf-trailer-id
the PDF trailer ID; must be two PDF byte strings if set, conven-
tionally with 16 bytes each. E.g., <00112233445566778899aabbc-
cddeeff> <00112233445566778899aabbccddeeff>.
See the section on reproducible builds.

Variables for ConTeXt
Pandoc uses these variables when creating a PDF with ConTeXt.

fontsize
font size for body text (e.g. 10pt, 12pt)

headertext, footertext
text to be placed in running header or footer (see ConTeXt Head-
ers and Footers); repeat up to four times for different place-
ment

indenting
controls indentation of paragraphs, e.g. yes,small,next (see
ConTeXt Indentation); repeat for multiple options

interlinespace
adjusts line spacing, e.g. 4ex (using setupinterlinespace); re-
peat for multiple options

layout options for page margins and text arrangement (see ConTeXt Lay-
out); repeat for multiple options

linkcolor, contrastcolor
color for links outside and inside a page, e.g. red, blue (see
ConTeXt Color)

linkstyle
typeface style for links, e.g. normal, bold, slanted, bold-
slanted, type, cap, small

lof, lot
include list of figures, list of tables

mainfont, sansfont, monofont, mathfont
font families: take the name of any system font (see ConTeXt
Font Switching)

mainfontfallback, sansfontfallback, monofontfallback
list of fonts to try, in order, if a glyph is not found in the
main font. Use \definefallbackfamily-compatible font name syn-
tax. Emoji fonts are unsupported.

margin-left, margin-right, margin-top, margin-bottom
sets margins, if layout is not used (otherwise layout overrides
these)

pagenumbering
page number style and location (using setuppagenumbering); re-
peat for multiple options

papersize
paper size, e.g. letter, A4, landscape (see ConTeXt Paper
Setup); repeat for multiple options

pdfa adds to the preamble the setup necessary to generate PDF/A of
the type specified, e.g. 1a:2005, 2a. If no type is specified
(i.e. the value is set to True, by e.g. --metadata=pdfa or
pdfa: true in a YAML metadata block), 1b:2005 will be used as
default, for reasons of backwards compatibility. Using --vari-
able=pdfa without specified value is not supported. To success-
fully generate PDF/A the required ICC color profiles have to be
available and the content and all included files (such as im-
ages) have to be standard-conforming. The ICC profiles and out-
put intent may be specified using the variables pdfaiccprofile
and pdfaintent. See also ConTeXt PDFA for more details.

pdfaiccprofile
when used in conjunction with pdfa, specifies the ICC profile to
use in the PDF, e.g. default.cmyk. If left unspecified,
sRGB.icc is used as default. May be repeated to include multi-
ple profiles. Note that the profiles have to be available on
the system. They can be obtained from ConTeXt ICC Profiles.

pdfaintent
when used in conjunction with pdfa, specifies the output intent
for the colors, e.g. ISO coated v2 300\letterpercent\space (ECI)
If left unspecified, sRGB IEC61966-2.1 is used as default.

toc include table of contents (can also be set using --toc/--ta-
ble-of-contents)

urlstyle
typeface style for links without link text, e.g. normal, bold,
slanted, boldslanted, type, cap, small

whitespace
spacing between paragraphs, e.g. none, small (using setupwhite-
space)

includesource
include all source documents as file attachments in the PDF file

Variables for wkhtmltopdf
Pandoc uses these variables when creating a PDF with wkhtmltopdf. The
--css option also affects the output.

footer-html, header-html
add information to the header and footer

margin-left, margin-right, margin-top, margin-bottom
set the page margins

papersize
sets the PDF paper size

Variables for man pages
adjusting
adjusts text to left (l), right (r), center (c), or both (b)
margins

footer footer in man pages

header header in man pages

section
section number in man pages

Variables for Texinfo
version
version of software (used in title and title page)

filename
name of info file to be generated (defaults to a name based on
the texi filename)

Variables for Typst
template
Typst template to use.

margin A dictionary with the fields defined in the Typst documentation:
x, y, top, bottom, left, right.

papersize
Paper size: a4, us-letter, etc.

mainfont
Name of system font to use for the main font.

fontsize
Font size (e.g., 12pt).

section-numbering
Schema to use for numbering sections, e.g. 1.A.1.

page-numbering
Schema to use for numbering pages, e.g. 1 or i, or an empty
string to omit page numbering.

columns
Number of columns for body text.

thanks contents of acknowledgments footnote after document title

mathfont, codefont
Name of system font to use for math and code, respectively.

linestretch
adjusts line spacing, e.g. 1.25, 1.5

linkcolor, filecolor, citecolor
color for external links, internal links, and citation links,
respectively: expects a hexadecimal color code

Variables for ms
fontfamily
A (Avant Garde), B (Bookman), C (Helvetica), HN (Helvetica Nar-
row), P (Palatino), or T (Times New Roman). This setting does
not affect source code, which is always displayed using mono-
space Courier. These built-in fonts are limited in their cover-
age of characters. Additional fonts may be installed using the
script install-font.sh provided by Peter Schaffter and docu-
mented in detail on his web site.

indent paragraph indent (e.g. 2m)

lineheight
line height (e.g. 12p)

pointsize
point size (e.g. 10p)

Variables set automatically
Pandoc sets these variables automatically in response to options or
document contents; users can also modify them. These vary depending on
the output format, and include the following:

body body of document

date-meta
the date variable converted to ISO 8601 YYYY-MM-DD, included in
all HTML based formats (dzslides, epub, html, html4, html5, re-
vealjs, s5, slideous, slidy). The recognized formats for date
are: mm/dd/yyyy, mm/dd/yy, yyyy-mm-dd (ISO 8601), dd MM yyyy
(e.g. either 02 Apr 2018 or 02 April 2018), MM dd, yyyy
(e.g. Apr. 02, 2018 or April 02,
2018),yyyy[mm[dd]](e.g.20180402, 201804 or 2018).

header-includes
contents specified by -H/--include-in-header (may have multiple
values)

include-before
contents specified by -B/--include-before-body (may have multi-
ple values)

include-after
contents specified by -A/--include-after-body (may have multiple
values)

meta-json
JSON representation of all of the document's metadata. Field
values are transformed to the selected output format.

numbersections
non-null value if -N/--number-sections was specified

sourcefile, outputfile
source and destination filenames, as given on the command line.
sourcefile can also be a list if input comes from multiple
files, or empty if input is from stdin. You can use the follow-
ing snippet in your template to distinguish them:

$if(sourcefile)$
$for(sourcefile)$
$sourcefile$
$endfor$
$else$
(stdin)
$endif$
Similarly, outputfile can be - if output goes to the ter-
minal. If you need absolute paths, use e.g. $cur-
dir$/$sourcefile$.

pdf-engine
name of PDF engine if provided using --pdf-engine, or the de-
fault engine for the format if PDF output is requested.

curdir working directory from which pandoc is run.

pandoc-version
pandoc version.

toc non-null value if --toc/--table-of-contents was specified

toc-title
title of table of contents (works only with EPUB, HTML, re-
vealjs, opendocument, odt, docx, pptx, beamer, LaTeX). Note
that in docx and pptx a custom toc-title will be picked up from
metadata, but cannot be set as a variable.

EXTENSIONS
The behavior of some of the readers and writers can be adjusted by en-
abling or disabling various extensions.

An extension can be enabled by adding +EXTENSION to the format name and
disabled by adding -EXTENSION. For example, --from mark-
down_strict+footnotes is strict Markdown with footnotes enabled, while
--from markdown-footnotes-pipe_tables is pandoc's Markdown without
footnotes or pipe tables.

The Markdown reader and writer make by far the most use of extensions.
Extensions only used by them are therefore covered in the section Pan-
doc's Markdown below (see Markdown variants for commonmark and gfm).
In the following, extensions that also work for other formats are cov-
ered.

Note that Markdown extensions added to the ipynb format affect Markdown
cells in Jupyter notebooks (as do command-line options like --mark-
down-headings).

Typography
Extension: smart
Interpret straight quotes as curly quotes, --- as em-dashes, -- as
en-dashes, and ... as ellipses. Nonbreaking spaces are inserted after
certain abbreviations, such as "Mr."

This extension can be enabled/disabled for the following formats:

input formats
markdown, commonmark, latex, mediawiki, org, rst, twiki, html

output formats
markdown, latex, context, org, rst

enabled by default in
markdown, latex, context (both input and output)

Note: If you are writing Markdown, then the smart extension has the re-
verse effect: what would have been curly quotes comes out straight.

In LaTeX, smart means to use the standard TeX ligatures for quotation
marks (`` and '' for double quotes, ` and ' for single quotes) and
dashes (-- for en-dash and --- for em-dash). If smart is disabled,
then in reading LaTeX pandoc will parse these characters literally. In
writing LaTeX, enabling smart tells pandoc to use the ligatures when
possible; if smart is disabled pandoc will use unicode quotation mark
and dash characters.

Headings and sections
Extension: auto_identifiers
A heading without an explicitly specified identifier will be automati-
cally assigned a unique identifier based on the heading text.

This extension can be enabled/disabled for the following formats:

input formats
markdown, latex, rst, mediawiki, textile

output formats
markdown, muse

enabled by default in
markdown, muse

The default algorithm used to derive the identifier from the heading
text is:

• Remove all formatting, links, etc.

• Remove all footnotes.

• Remove all non-alphanumeric characters, except underscores, hyphens,
and periods.

• Replace all spaces and newlines with hyphens.

• Convert all alphabetic characters to lowercase.

• Remove everything up to the first letter (identifiers may not begin
with a number or punctuation mark).

• If nothing is left after this, use the identifier section.

Thus, for example,

Heading Identifier
----------------------------- -----------------------------
Heading identifiers in HTML heading-identifiers-in-html
Matre d'htel matre-dhtel
*Dogs*?--in *my* house? dogs--in-my-house
[HTML], [S5], or [RTF]? html-s5-or-rtf
3. Applications applications
33 section

These rules should, in most cases, allow one to determine the identi-
fier from the heading text. The exception is when several headings
have the same text; in this case, the first will get an identifier as
described above; the second will get the same identifier with -1 ap-
pended; the third with -2; and so on.

(However, a different algorithm is used if gfm_auto_identifiers is en-
abled; see below.)

These identifiers are used to provide link targets in the table of con-
tents generated by the --toc|--table-of-contents option. They also
make it easy to provide links from one section of a document to an-
other. A link to this section, for example, might look like this:

See the section on
[heading identifiers](#heading-identifiers-in-html-latex-and-context).

Note, however, that this method of providing links to sections works
only in HTML, LaTeX, and ConTeXt formats.

If the --section-divs option is specified, then each section will be
wrapped in a section (or a div, if html4 was specified), and the iden-
tifier will be attached to the enclosing <section> (or <div>) tag
rather than the heading itself. This allows entire sections to be ma-
nipulated using JavaScript or treated differently in CSS.

Extension: ascii_identifiers
Causes the identifiers produced by auto_identifiers to be pure ASCII.
Accents are stripped off of accented Latin letters, and non-Latin let-
ters are omitted.

Extension: gfm_auto_identifiers
Changes the algorithm used by auto_identifiers to conform to GitHub's
method. Spaces are converted to dashes (-), uppercase characters to
lowercase characters, and punctuation characters other than - and _ are
removed. Emojis are replaced by their names.

Math Input
The extensions tex_math_dollars, tex_math_gfm, tex_math_single_back-
slash, and tex_math_double_backslash are described in the section about
Pandoc's Markdown.

However, they can also be used with HTML input. This is handy for
reading web pages formatted using MathJax, for example.

Raw HTML/TeX
The following extensions are described in more detail in their respec-
tive sections of Pandoc's Markdown:

• raw_html allows HTML elements which are not representable in pandoc's
AST to be parsed as raw HTML. By default, this is disabled for HTML
input.

• raw_tex allows raw LaTeX, TeX, and ConTeXt to be included in a docu-
ment. This extension can be enabled/disabled for the following for-
mats (in addition to markdown):

input formats
latex, textile, html (environments, \ref, and \eqref only),
ipynb

output formats
textile, commonmark

Note: as applied to ipynb, raw_html and raw_tex affect not only raw
TeX in Markdown cells, but data with mime type text/html in output
cells. Since the ipynb reader attempts to preserve the richest pos-
sible outputs when several options are given, you will get best re-
sults if you disable raw_html and raw_tex when converting to formats
like docx which don't allow raw html or tex.

• native_divs causes HTML div elements to be parsed as native pandoc
Div blocks. If you want them to be parsed as raw HTML, use -f
html-native_divs+raw_html.

• native_spans causes HTML span elements to be parsed as native pandoc
Span inlines. If you want them to be parsed as raw HTML, use -f
html-native_spans+raw_html. If you want to drop all divs and spans
when converting HTML to Markdown, you can use pandoc -f html-na-
tive_divs-native_spans -t markdown.

Literate Haskell support
Extension: literate_haskell
Treat the document as literate Haskell source.

This extension can be enabled/disabled for the following formats:

input formats
markdown, rst, latex

output formats
markdown, rst, latex, html

If you append +lhs (or +literate_haskell) to one of the formats above,
pandoc will treat the document as literate Haskell source. This means
that

• In Markdown input, "bird track" sections will be parsed as Haskell
code rather than block quotations. Text between \begin{code} and
\end{code} will also be treated as Haskell code. For ATX-style head-
ings the character `=' will be used instead of `#'.

• In Markdown output, code blocks with classes haskell and literate
will be rendered using bird tracks, and block quotations will be in-
dented one space, so they will not be treated as Haskell code. In
addition, headings will be rendered setext-style (with underlines)
rather than ATX-style (with `#' characters). (This is because ghc
treats `#' characters in column 1 as introducing line numbers.)

• In restructured text input, "bird track" sections will be parsed as
Haskell code.

• In restructured text output, code blocks with class haskell will be
rendered using bird tracks.

• In LaTeX input, text in code environments will be parsed as Haskell
code.

• In LaTeX output, code blocks with class haskell will be rendered in-
side code environments.

• In HTML output, code blocks with class haskell will be rendered with
class literatehaskell and bird tracks.

Examples:

pandoc -f markdown+lhs -t html

reads literate Haskell source formatted with Markdown conventions and
writes ordinary HTML (without bird tracks).

pandoc -f markdown+lhs -t html+lhs

writes HTML with the Haskell code in bird tracks, so it can be copied
and pasted as literate Haskell source.

Note that GHC expects the bird tracks in the first column, so indented
literate code blocks (e.g. inside an itemized environment) will not be
picked up by the Haskell compiler.

Other extensions
Extension: empty_paragraphs
Allows empty paragraphs. By default empty paragraphs are omitted.

This extension can be enabled/disabled for the following formats:

input formats
docx, html

output formats
docx, odt, opendocument, html, latex

Extension: native_numbering
Enables native numbering of figures and tables. Enumeration starts at
1.

This extension can be enabled/disabled for the following formats:

output formats
odt, opendocument, docx

Extension: xrefs_name
Links to headings, figures and tables inside the document are substi-
tuted with cross-references that will use the name or caption of the
referenced item. The original link text is replaced once the generated
document is refreshed. This extension can be combined with xrefs_num-
ber in which case numbers will appear before the name.

Text in cross-references is only made consistent with the referenced
item once the document has been refreshed.

This extension can be enabled/disabled for the following formats:

output formats
odt, opendocument

Extension: xrefs_number
Links to headings, figures and tables inside the document are substi-
tuted with cross-references that will use the number of the referenced
item. The original link text is discarded. This extension can be com-
bined with xrefs_name in which case the name or caption numbers will
appear after the number.

For the xrefs_number to be useful heading numbers must be enabled in
the generated document, also table and figure captions must be enabled
using for example the native_numbering extension.

Numbers in cross-references are only visible in the final document once
it has been refreshed.

This extension can be enabled/disabled for the following formats:

output formats
odt, opendocument

Extension: styles
When converting from docx, add custom-styles attributes for all docx
styles, regardless of whether pandoc understands the meanings of these
styles. Because attributes cannot be added directly to paragraphs or
text in the pandoc AST, paragraph styles will cause Divs to be created
and character styles will cause Spans to be created to hold the attrib-
utes. (Table styles will be added to the Table elements directly.)
This extension can be used with docx custom styles.

input formats
docx

Extension: amuse
In the muse input format, this enables Text::Amuse extensions to Emacs
Muse markup.

Extension: raw_markdown
In the ipynb input format, this causes Markdown cells to be included as
raw Markdown blocks (allowing lossless round-tripping) rather than be-
ing parsed. Use this only when you are targeting ipynb or a Mark-
down-based output format.

Extension: citations (typst)
When the citations extension is enabled in typst (as it is by default),
typst citations will be parsed as native pandoc citations, and native
pandoc citations will be rendered as typst citations.

Extension: citations (org)
When the citations extension is enabled in org, org-cite and org-ref
style citations will be parsed as native pandoc citations, and org-cite
citations will be used to render native pandoc citations.

Extension: citations (docx)
When citations is enabled in docx, citations inserted by Zotero or
Mendeley or EndNote plugins will be parsed as native pandoc citations.
(Otherwise, the formatted citations generated by the bibliographic
software will be parsed as regular text.)

Extension: fancy_lists (org)
Some aspects of Pandoc's Markdown fancy lists are also accepted in org
input, mimicking the option org-list-allow-alphabetical in Emacs. As
in Org Mode, enabling this extension allows lowercase and uppercase al-
phabetical markers for ordered lists to be parsed in addition to arabic
ones. Note that for Org, this does not include roman numerals or the #
placeholder that are enabled by the extension in Pandoc's Markdown.

Extension: element_citations
In the jats output formats, this causes reference items to be replaced
with <element-citation> elements. These elements are not influenced by
CSL styles, but all information on the item is included in tags.

Extension: ntb
In the context output format this enables the use of Natural Tables
(TABLE) instead of the default Extreme Tables (xtables). Natural ta-
bles allow more fine-grained global customization but come at a perfor-
mance penalty compared to extreme tables.

Extension: smart_quotes (org)
Interpret straight quotes as curly quotes during parsing. When writing
Org, then the smart_quotes extension has the reverse effect: what would
have been curly quotes comes out straight.

This extension is implied if smart is enabled.

Extension: special_strings (org)
Interpret --- as em-dashes, -- as en-dashes, \- as shy hyphen, and ...
as ellipses.

This extension is implied if smart is enabled.

Extension: tagging
Enabling this extension with context output will produce markup suit-
able for the production of tagged PDFs. This includes additional mark-
ers for paragraphs and alternative markup for emphasized text. The em-
phasis-command template variable is set if the extension is enabled.

PANDOC'S MARKDOWN
Pandoc understands an extended and slightly revised version of John
Gruber's Markdown syntax. This document explains the syntax, noting
differences from original Markdown. Except where noted, these differ-
ences can be suppressed by using the markdown_strict format instead of
markdown. Extensions can be enabled or disabled to specify the behav-
ior more granularly. They are described in the following. See also
Extensions above, for extensions that work also on other formats.

Philosophy
Markdown is designed to be easy to write, and, even more importantly,
easy to read:

A Markdown-formatted document should be publishable as-is, as
plain text, without looking like it's been marked up with tags
or formatting instructions.
- John Gruber

This principle has guided pandoc's decisions in finding syntax for ta-
bles, footnotes, and other extensions.

There is, however, one respect in which pandoc's aims are different
from the original aims of Markdown. Whereas Markdown was originally
designed with HTML generation in mind, pandoc is designed for multiple
output formats. Thus, while pandoc allows the embedding of raw HTML,
it discourages it, and provides other, non-HTMLish ways of representing
important document elements like definition lists, tables, mathematics,
and footnotes.

Paragraphs
A paragraph is one or more lines of text followed by one or more blank
lines. Newlines are treated as spaces, so you can reflow your para-
graphs as you like. If you need a hard line break, put two or more
spaces at the end of a line.

Extension: escaped_line_breaks
A backslash followed by a newline is also a hard line break. Note: in
multiline and grid table cells, this is the only way to create a hard
line break, since trailing spaces in the cells are ignored.

Headings
There are two kinds of headings: Setext and ATX.

Setext-style headings
A setext-style heading is a line of text "underlined" with a row of =
signs (for a level-one heading) or - signs (for a level-two heading):

A level-one heading
===================

A level-two heading
-------------------

The heading text can contain inline formatting, such as emphasis (see
Inline formatting, below).

ATX-style headings
An ATX-style heading consists of one to six # signs and a line of text,
optionally followed by any number of # signs. The number of # signs at
the beginning of the line is the heading level:

## A level-two heading

### A level-three heading ###

As with setext-style headings, the heading text can contain formatting:

# A level-one heading with a [link](/url) and *emphasis*

Extension: blank_before_header
Original Markdown syntax does not require a blank line before a head-
ing. Pandoc does require this (except, of course, at the beginning of
the document). The reason for the requirement is that it is all too
easy for a # to end up at the beginning of a line by accident (perhaps
through line wrapping). Consider, for example:

I like several of their flavors of ice cream:
#22, for example, and #5.

Extension: space_in_atx_header
Many Markdown implementations do not require a space between the open-
ing #s of an ATX heading and the heading text, so that #5 bolt and
#hashtag count as headings. With this extension, pandoc does require
the space.

Heading identifiers
See also the auto_identifiers extension above.

Extension: header_attributes
Headings can be assigned attributes using this syntax at the end of the
line containing the heading text:

{#identifier .class .class key=value key=value}

Thus, for example, the following headings will all be assigned the
identifier foo:

# My heading {#foo}

## My heading ## {#foo}

My other heading {#foo}
---------------

(This syntax is compatible with PHP Markdown Extra.)

Note that although this syntax allows assignment of classes and
key/value attributes, writers generally don't use all of this informa-
tion. Identifiers, classes, and key/value attributes are used in HTML
and HTML-based formats such as EPUB and slidy. Identifiers are used
for labels and link anchors in the LaTeX, ConTeXt, Textile, Jira
markup, and AsciiDoc writers.

Headings with the class unnumbered will not be numbered, even if --num-
ber-sections is specified. A single hyphen (-) in an attribute context
is equivalent to .unnumbered, and preferable in non-English documents.
So,

# My heading {-}

is just the same as

# My heading {.unnumbered}

If the unlisted class is present in addition to unnumbered, the heading
will not be included in a table of contents. (Currently this feature
is only implemented for certain formats: those based on LaTeX and HTML,
PowerPoint, and RTF.)

Extension: implicit_header_references
Pandoc behaves as if reference links have been defined for each head-
ing. So, to link to a heading

# Heading identifiers in HTML

you can simply write

[Heading identifiers in HTML]

[Heading identifiers in HTML][]

[the section on heading identifiers][heading identifiers in
HTML]

instead of giving the identifier explicitly:

[Heading identifiers in HTML](#heading-identifiers-in-html)

If there are multiple headings with identical text, the corresponding
reference will link to the first one only, and you will need to use ex-
plicit links to link to the others, as described above.

Like regular reference links, these references are case-insensitive.

Explicit link reference definitions always take priority over implicit
heading references. So, in the following example, the link will point
to bar, not to #foo:

# Foo

[foo]: bar

See [foo]

Block quotations
Markdown uses email conventions for quoting blocks of text. A block
quotation is one or more paragraphs or other block elements (such as
lists or headings), with each line preceded by a > character and an op-
tional space. (The > need not start at the left margin, but it should
not be indented more than three spaces.)

> This is a block quote. This
> paragraph has two lines.
>
> 1. This is a list inside a block quote.
> 2. Second item.

A "lazy" form, which requires the > character only on the first line of
each block, is also allowed:

> This is a block quote. This
paragraph has two lines.

> 1. This is a list inside a block quote.
2. Second item.

Among the block elements that can be contained in a block quote are
other block quotes. That is, block quotes can be nested:

> This is a block quote.
>
> > A block quote within a block quote.

If the > character is followed by an optional space, that space will be
considered part of the block quote marker and not part of the indenta-
tion of the contents. Thus, to put an indented code block in a block
quote, you need five spaces after the >:

> code

Extension: blank_before_blockquote
Original Markdown syntax does not require a blank line before a block
quote. Pandoc does require this (except, of course, at the beginning
of the document). The reason for the requirement is that it is all too
easy for a > to end up at the beginning of a line by accident (perhaps
through line wrapping). So, unless the markdown_strict format is used,
the following does not produce a nested block quote in pandoc:

> This is a block quote.
>> Not nested, since `blank_before_blockquote` is enabled by default

Verbatim (code) blocks
Indented code blocks
A block of text indented four spaces (or one tab) is treated as verba-
tim text: that is, special characters do not trigger special format-
ting, and all spaces and line breaks are preserved. For example,

if (a > 3) {
moveShip(5 * gravity, DOWN);
}

The initial (four space or one tab) indentation is not considered part
of the verbatim text, and is removed in the output.

Note: blank lines in the verbatim text need not begin with four spaces.

Fenced code blocks
Extension: fenced_code_blocks
In addition to standard indented code blocks, pandoc supports fenced
code blocks. These begin with a row of three or more tildes (~) and
end with a row of tildes that must be at least as long as the starting
row. Everything between these lines is treated as code. No indenta-
tion is necessary:

~~~~~~~
if (a > 3) {
moveShip(5 * gravity, DOWN);
}
~~~~~~~

Like regular code blocks, fenced code blocks must be separated from
surrounding text by blank lines.

If the code itself contains a row of tildes or backticks, just use a
longer row of tildes or backticks at the start and end:

~~~~~~~~~~~~~~~~
~~~~~~~~~~
code including tildes
~~~~~~~~~~
~~~~~~~~~~~~~~~~

Extension: backtick_code_blocks
Same as fenced_code_blocks, but uses backticks (`) instead of tildes
(~).

Extension: fenced_code_attributes
Optionally, you may attach attributes to fenced or backtick code block
using this syntax:

~~~~ {#mycode .haskell .numberLines startFrom="100"}
qsort [] = []
qsort (x:xs) = qsort (filter (< x) xs) ++ [x] ++
qsort (filter (>= x) xs)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Here mycode is an identifier, haskell and numberLines are classes, and
startFrom is an attribute with value 100. Some output formats can use
this information to do syntax highlighting. Currently, the only output
formats that use this information are HTML, LaTeX, Docx, Ms, and Power-
Point. If highlighting is supported for your output format and lan-
guage, then the code block above will appear highlighted, with numbered
lines. (To see which languages are supported, type pandoc --list-high-
light-languages.) Otherwise, the code block above will appear as fol-
lows:

The numberLines (or number-lines) class will cause the lines of the
code block to be numbered, starting with 1 or the value of the start-
From attribute. The lineAnchors (or line-anchors) class will cause the
lines to be clickable anchors in HTML output.

A shortcut form can also be used for specifying the language of the
code block:

```haskell
qsort [] = []
```

This is equivalent to:

``` {.haskell}
qsort [] = []
```

This shortcut form may be combined with attributes:

```haskell {.numberLines}
qsort [] = []
```

Which is equivalent to:

``` {.haskell .numberLines}
qsort [] = []
```

If the fenced_code_attributes extension is disabled, but input contains
class attribute(s) for the code block, the first class attribute will
be printed after the opening fence as a bare word.

To prevent all highlighting, use the --syntax-highlighting=none option.
To set the highlighting style or method, use --syntax-highlighting.
For more information on highlighting, see Syntax highlighting, below.

Line blocks
Extension: line_blocks
A line block is a sequence of lines beginning with a vertical bar (|)
followed by a space. The division into lines will be preserved in the
output, as will any leading spaces; otherwise, the lines will be for-
matted as Markdown. This is useful for verse and addresses:

| 200 Main St.
| Berkeley, CA 94718

The lines can be hard-wrapped if needed, but the continuation line must
begin with a space.

| The Right Honorable Most Venerable and Righteous Samuel L.
Constable, Jr.
| 200 Main St.
| Berkeley, CA 94718

Inline formatting (such as emphasis) is allowed in the content (though
it can't cross line boundaries). Block-level formatting (such as block
quotes or lists) is not recognized.

This syntax is borrowed from reStructuredText.

Lists
Bullet lists
A bullet list is a list of bulleted list items. A bulleted list item
begins with a bullet (*, +, or -). Here is a simple example:

* one
* two
* three

This will produce a "compact" list. If you want a "loose" list, in
which each item is formatted as a paragraph, put spaces between the
items:

* one

* two

* three

The bullets need not be flush with the left margin; they may be in-
dented one, two, or three spaces. The bullet must be followed by
whitespace.

List items look best if subsequent lines are flush with the first line
(after the bullet):

* here is my first
list item.
* and my second.

But Markdown also allows a "lazy" format:

* here is my first
list item.
* and my second.

Block content in list items
A list item may contain multiple paragraphs and other block-level con-
tent. However, subsequent paragraphs must be preceded by a blank line
and indented to line up with the first non-space content after the list
marker.

* First paragraph.

Continued.

* Second paragraph. With a code block, which must be indented
eight spaces:

{ code }

Exception: if the list marker is followed by an indented code block,
which must begin 5 spaces after the list marker, then subsequent para-
graphs must begin two columns after the last character of the list
marker:

* code

continuation paragraph

List items may include other lists. In this case the preceding blank
line is optional. The nested list must be indented to line up with the
first non-space character after the list marker of the containing list
item.

* fruits
+ apples
- macintosh
- red delicious
+ pears
+ peaches
* vegetables
+ broccoli
+ chard

As noted above, Markdown allows you to write list items "lazily," in-
stead of indenting continuation lines. However, if there are multiple
paragraphs or other blocks in a list item, the first line of each must
be indented.

+ A lazy, lazy, list
item.

+ Another one; this looks
bad but is legal.

Second paragraph of second
list item.

Ordered lists
Ordered lists work just like bulleted lists, except that the items be-
gin with enumerators rather than bullets.

In original Markdown, enumerators are decimal numbers followed by a pe-
riod and a space. The numbers themselves are ignored, so there is no
difference between this list:

1. one
2. two
3. three

and this one:

5. one
7. two
1. three

Extension: fancy_lists
Unlike original Markdown, pandoc allows ordered list items to be marked
with uppercase and lowercase letters and roman numerals, in addition to
Arabic numerals. List markers may be enclosed in parentheses or fol-
lowed by a single right-parenthesis or period. They must be separated
from the text that follows by at least one space, and, if the list
marker is a capital letter with a period, by at least two spaces.

The fancy_lists extension also allows `#' to be used as an ordered list
marker in place of a numeral:

#. one
#. two

Note: the `#' ordered list marker doesn't work with commonmark.

Extension: startnum
Pandoc also pays attention to the type of list marker used, and to the
starting number, and both of these are preserved where possible in the
output format. Thus, the following yields a list with numbers followed
by a single parenthesis, starting with 9, and a sublist with lowercase
roman numerals:

9) Ninth
10) Tenth
11) Eleventh
i. subone
ii. subtwo
iii. subthree

Pandoc will start a new list each time a different type of list marker
is used. So, the following will create three lists:

(2) Two
(5) Three
1. Four
* Five

If default list markers are desired, use #.:

#. one
#. two
#. three

Extension: task_lists
Pandoc supports task lists, using the syntax of GitHub-Flavored Mark-
down.

- [ ] an unchecked task list item
- [x] checked item

Definition lists
Extension: definition_lists
Pandoc supports definition lists, using the syntax of PHP Markdown Ex-
tra with some extensions.

Term 1

: Definition 1

Term 2 with *inline markup*

: Definition 2

{ some code, part of Definition 2 }

Third paragraph of definition 2.

Each term must fit on one line, which may optionally be followed by a
blank line, and must be followed by one or more definitions. A defini-
tion begins with a colon or tilde, which may be indented one or two
spaces.

A term may have multiple definitions, and each definition may consist
of one or more block elements (paragraph, code block, list, etc.), each
indented four spaces or one tab stop. The body of the definition (not
including the first line) should be indented four spaces. However, as
with other Markdown lists, you can "lazily" omit indentation except at
the beginning of a paragraph or other block element:

Term 1

: Definition
with lazy continuation.

Second paragraph of the definition.

If you leave space before the definition (as in the example above), the
text of the definition will be treated as a paragraph. In some output
formats, this will mean greater spacing between term/definition pairs.
For a more compact definition list, omit the space before the defini-
tion:

Term 1
~ Definition 1

Term 2
~ Definition 2a
~ Definition 2b

Note that space between items in a definition list is required.

Numbered example lists
Extension: example_lists
The special list marker @ can be used for sequentially numbered exam-
ples. The first list item with a @ marker will be numbered `1', the
next `2', and so on, throughout the document. The numbered examples
need not occur in a single list; each new list using @ will take up
where the last stopped. So, for example:

(@) My first example will be numbered (1).
(@) My second example will be numbered (2).

Explanation of examples.

(@) My third example will be numbered (3).

Numbered examples can be labeled and referred to elsewhere in the docu-
ment:

(@good) This is a good example.

As (@good) illustrates, ...

The label can be any string of alphanumeric characters, underscores, or
hyphens.

Continuation paragraphs in example lists must always be indented four
spaces, regardless of the length of the list marker. That is, example
lists always behave as if the four_space_rule extension is set. This
is because example labels tend to be long, and indenting content to the
first non-space character after the label would be awkward.

You can repeat an earlier numbered example by re-using its label:

(@foo) Sample sentence.

Intervening text...

This theory can explain the case we saw earlier (repeated):

(@foo) Sample sentence.

This only works reliably, though, if the repeated item is in a list by
itself, because each numbered example list will be numbered continu-
ously from its starting number.

Ending a list
What if you want to put an indented code block after a list?

- item one
- item two

{ my code block }

Trouble! Here pandoc (like other Markdown implementations) will treat
{ my code block } as the second paragraph of item two, and not as a
code block.

To "cut off" the list after item two, you can insert some non-indented
content, like an HTML comment, which won't produce visible output in
any format:

- item one
- item two

{ my code block }

You can use the same trick if you want two consecutive lists instead of
one big list:

1. one
2. two
3. three

1. uno
2. dos
3. tres

Horizontal rules
A line containing a row of three or more *, -, or _ characters (option-
ally separated by spaces) produces a horizontal rule:

* * * *

---------------

We strongly recommend that horizontal rules be separated from surround-
ing text by blank lines. If a horizontal rule is not followed by a
blank line, pandoc may try to interpret the lines that follow as a YAML
metadata block or a table.

Tables
Four kinds of tables may be used. The first three kinds presuppose the
use of a fixed-width font, such as Courier. The fourth kind can be
used with proportionally spaced fonts, as it does not require lining up
columns.

Extension: table_captions
A caption may optionally be provided with all 4 kinds of tables (as il-
lustrated in the examples below). A caption is a paragraph beginning
with the string Table: (or table: or just :), which will be stripped
off. It may appear either before or after the table.

Extension: simple_tables
Simple tables look like this:

Right Left Center Default
------- ------ ---------- -------
12 12 12 12
123 123 123 123
1 1 1 1

Table: Demonstration of simple table syntax.

The header and table rows must each fit on one line. Column alignments
are determined by the position of the header text relative to the
dashed line below it:

• If the dashed line is flush with the header text on the right side
but extends beyond it on the left, the column is right-aligned.

• If the dashed line is flush with the header text on the left side but
extends beyond it on the right, the column is left-aligned.

• If the dashed line extends beyond the header text on both sides, the
column is centered.

• If the dashed line is flush with the header text on both sides, the
default alignment is used (in most cases, this will be left).

The table must end with a blank line, or a line of dashes followed by a
blank line.

The column header row may be omitted, provided a dashed line is used to
end the table. For example:

------- ------ ---------- -------
12 12 12 12
123 123 123 123
1 1 1 1
------- ------ ---------- -------

When the header row is omitted, column alignments are determined on the
basis of the first line of the table body. So, in the tables above,
the columns would be right, left, center, and right aligned, respec-
tively.

Extension: multiline_tables
Multiline tables allow header and table rows to span multiple lines of
text (but cells that span multiple columns or rows of the table are not
supported). Here is an example:

-------------------------------------------------------------
Centered Default Right Left
Header Aligned Aligned Aligned
----------- ------- --------------- -------------------------
First row 12.0 Example of a row that
spans multiple lines.

Second row 5.0 Here's another one. Note
the blank line between
rows.
-------------------------------------------------------------

Table: Here's the caption. It, too, may span
multiple lines.

These work like simple tables, but with the following differences:

• They must begin with a row of dashes, before the header text (unless
the header row is omitted).

• They must end with a row of dashes, then a blank line.

• The rows must be separated by blank lines.

In multiline tables, the table parser pays attention to the widths of
the columns, and the writers try to reproduce these relative widths in
the output. So, if you find that one of the columns is too narrow in
the output, try widening it in the Markdown source.

The header may be omitted in multiline tables as well as simple tables:

----------- ------- --------------- -------------------------
First row 12.0 Example of a row that
spans multiple lines.

Second row 5.0 Here's another one. Note
the blank line between
rows.
----------- ------- --------------- -------------------------

: Here's a multiline table without a header.

It is possible for a multiline table to have just one row, but the row
should be followed by a blank line (and then the row of dashes that
ends the table), or the table may be interpreted as a simple table.

Extension: grid_tables
Grid tables look like this:

: Sample grid table.

The row of =s separates the header from the table body, and can be
omitted for a headerless table. The cells of grid tables may contain
arbitrary block elements (multiple paragraphs, code blocks, lists,
etc.).

Cells can span multiple columns or rows:

+---------------------+----------+
| Property | Earth |
+=============+=======+==========+
| | min | -89.2 C |
| Temperature +-------+----------+
| 1961-1990 | mean | 14 C |
| +-------+----------+
| | max | 56.7 C |
+-------------+-------+----------+

A table header may contain more than one row:

+---------------------+-----------------------+
| Location | Temperature 1961-1990 |
| | in degree Celsius |
| +-------+-------+-------+
| | min | mean | max |
+=====================+=======+=======+=======+
| Antarctica | -89.2 | N/A | 19.8 |
+---------------------+-------+-------+-------+
| Earth | -89.2 | 14 | 56.7 |
+---------------------+-------+-------+-------+

Alignments can be specified as with pipe tables, by putting colons at
the boundaries of the separator line after the header:

+---------------+---------------+--------------------+
| Right | Left | Centered |
+==============:+:==============+:==================:+
| Bananas | $1.34 | built-in wrapper |
+---------------+---------------+--------------------+

For headerless tables, the colons go on the top line instead:

+--------------:+:--------------+:------------------:+
| Right | Left | Centered |
+---------------+---------------+--------------------+

A table foot can be defined by enclosing it with separator lines that
use = instead of -:

+---------------+---------------+
| Fruit | Price |
+===============+===============+
| Bananas | $1.34 |
+---------------+---------------+
| Oranges | $2.10 |
+===============+===============+
| Sum | $3.44 |
+===============+===============+

The foot must always be placed at the very bottom of the table.

Grid tables can be created easily using Emacs' table-mode (M-x ta-
ble-insert).

Extension: pipe_tables
Pipe tables look like this:

| Right | Left | Default | Center |
|------:|:-----|---------|:------:|
| 12 | 12 | 12 | 12 |
| 123 | 123 | 123 | 123 |
| 1 | 1 | 1 | 1 |

: Demonstration of pipe table syntax.

The syntax is identical to PHP Markdown Extra tables. The beginning
and ending pipe characters are optional, but pipes are required between
all columns. The colons indicate column alignment as shown. The
header cannot be omitted. To simulate a headerless table, include a
header with blank cells.

Since the pipes indicate column boundaries, columns need not be verti-
cally aligned, as they are in the above example. So, this is a per-
fectly legal (though ugly) pipe table:

fruit| price
-----|-----:
apple|2.05
pear|1.37
orange|3.09

The cells of pipe tables cannot contain block elements like paragraphs
and lists, and cannot span multiple lines. If any line of the Markdown
source is longer than the column width (see --columns), then the table
will take up the full text width and the cell contents will wrap, with
the relative cell widths determined by the number of dashes in the line
separating the table header from the table body. (For example ---|-
would make the first column 3/4 and the second column 1/4 of the full
text width.) On the other hand, if no lines are wider than column
width, then cell contents will not be wrapped, and the cells will be
sized to their contents.

Note: pandoc also recognizes pipe tables of the following form, as can
be produced by Emacs' orgtbl-mode:

| One | Two |
|-----+-------|
| my | table |
| is | nice |

The difference is that + is used instead of |. Other orgtbl features
are not supported. In particular, to get non-default column alignment,
you'll need to add colons as above.

Metadata blocks
Extension: pandoc_title_block
If the file begins with a title block

% title
% author(s) (separated by semicolons)
% date

it will be parsed as bibliographic information, not regular text. (It
will be used, for example, in the title of standalone LaTeX or HTML
output.) The block may contain just a title, a date and an author, or
all three elements. If you want to include an author but no title, or
a title and a date but no author, you need a blank line:

%
% Author

% My title
%
% June 15, 2006

The title may occupy multiple lines, but continuation lines must begin
with leading space, thus:

% My title
on multiple lines

If a document has multiple authors, the authors may be put on separate
lines with leading space, or separated by semicolons, or both. So, all
of the following are equivalent:

% Author One
Author Two

% Author One; Author Two

% Author One;
Author Two

The date must fit on one line.

All three metadata fields may contain standard inline formatting (ital-
ics, links, footnotes, etc.).

Title blocks will always be parsed, but they will affect the output
only when the --standalone (-s) option is chosen. In HTML output, ti-
tles will appear twice: once in the document head--this is the title
that will appear at the top of the window in a browser--and once at the
beginning of the document body. The title in the document head can
have an optional prefix attached (--title-prefix or -T option). The
title in the body appears as an H1 element with class "title", so it
can be suppressed or reformatted with CSS. If a title prefix is speci-
fied with -T and no title block appears in the document, the title pre-
fix will be used by itself as the HTML title.

The man page writer extracts a title, man page section number, and
other header and footer information from the title line. The title is
assumed to be the first word on the title line, which may optionally
end with a (single-digit) section number in parentheses. (There should
be no space between the title and the parentheses.) Anything after
this is assumed to be additional footer and header text. A single pipe
character (|) should be used to separate the footer text from the
header text. Thus,

% PANDOC(1)

will yield a man page with the title PANDOC and section 1.

% PANDOC(1) Pandoc User Manuals

will also have "Pandoc User Manuals" in the footer.

% PANDOC(1) Pandoc User Manuals | Version 4.0

will also have "Version 4.0" in the header.

Extension: yaml_metadata_block
A YAML metadata block is a valid YAML object, delimited by a line of
three hyphens (---) at the top and a line of three hyphens (---) or
three dots (...) at the bottom. The initial line --- must not be fol-
lowed by a blank line. A YAML metadata block may occur anywhere in the
document, but if it is not at the beginning, it must be preceded by a
blank line.

Note that, because of the way pandoc concatenates input files when sev-
eral are provided, you may also keep the metadata in a separate YAML
file and pass it to pandoc as an argument, along with your Markdown
files:

pandoc chap1.md chap2.md chap3.md metadata.yaml -s -o book.html

Just be sure that the YAML file begins with --- and ends with --- or
.... Alternatively, you can use the --metadata-file option. Using
that approach however, you cannot reference content (like footnotes)
from the main Markdown input document.

Metadata will be taken from the fields of the YAML object and added to
any existing document metadata. Metadata can contain lists and objects
(nested arbitrarily), but all string scalars will be interpreted as
Markdown. Fields with names ending in an underscore will be ignored by
pandoc. (They may be given a role by external processors.) Field
names must not be interpretable as YAML numbers or boolean values (so,
for example, yes, True, and 15 cannot be used as field names).

A document may contain multiple metadata blocks. If two metadata
blocks attempt to set the same field, the value from the second block
will be taken.

Each metadata block is handled internally as an independent YAML docu-
ment. This means, for example, that any YAML anchors defined in a
block cannot be referenced in another block.

When pandoc is used with -t markdown to create a Markdown document, a
YAML metadata block will be produced only if the -s/--standalone option
is used. All of the metadata will appear in a single block at the be-
ginning of the document.

Note that YAML escaping rules must be followed. Thus, for example, if
a title contains a colon, it must be quoted, and if it contains a back-
slash escape, then it must be ensured that it is not treated as a YAML
escape sequence. The pipe character (|) can be used to begin an in-
dented block that will be interpreted literally, without need for es-
caping. This form is necessary when the field contains blank lines or
block-level formatting:

---
title: 'This is the title: it contains a colon'
author:
- Author One
- Author Two
keywords: [nothing, nothingness]
abstract: |
This is the abstract.

It consists of two paragraphs.
...

The literal block after the | must be indented relative to the line
containing the |. If it is not, the YAML will be invalid and pandoc
will not interpret it as metadata. For an overview of the complex
rules governing YAML, see the Wikipedia entry on YAML syntax.

Template variables will be set automatically from the metadata. Thus,
for example, in writing HTML, the variable abstract will be set to the
HTML equivalent of the Markdown in the abstract field:

<p>This is the abstract.</p>
<p>It consists of two paragraphs.</p>

Variables can contain arbitrary YAML structures, but the template must
match this structure. The author variable in the default templates ex-
pects a simple list or string, but can be changed to support more com-
plicated structures. The following combination, for example, would add
an affiliation to the author if one is given:

---
title: The document title
author:
- name: Author One
affiliation: University of Somewhere
- name: Author Two
affiliation: University of Nowhere
...

To use the structured authors in the example above, you would need a
custom template:

$for(author)$
$if(author.name)$
$author.name$$if(author.affiliation)$ ($author.affiliation$)$endif$
$else$
$author$
$endif$
$endfor$

Raw content to include in the document's header may be specified using
header-includes; however, it is important to mark up this content as
raw code for a particular output format, using the raw_attribute exten-
sion, or it will be interpreted as Markdown. For example:

header-includes:
- |
```{=latex}
\let\oldsection\section
\renewcommand{\section}[1]{\clearpage\oldsection{#1}}
```

Note: the yaml_metadata_block extension works with commonmark as well
as markdown (and it is enabled by default in gfm and commonmark_x).
However, in these formats the following restrictions apply:

• The YAML metadata block must occur at the beginning of the document
(and there can be only one). If multiple files are given as argu-
ments to pandoc, only the first can be a YAML metadata block.

• The leaf nodes of the YAML structure are parsed in isolation from
each other and from the rest of the document. So, for example, you
can't use a reference link in these contexts if the link definition
is somewhere else in the document.

Backslash escapes
Extension: all_symbols_escapable
Except inside a code block or inline code, any punctuation or space
character preceded by a backslash will be treated literally, even if it
would normally indicate formatting. Thus, for example, if one writes

*\*hello\**

one will get

<em>*hello*</em>

instead of

<strong>hello</strong>

This rule is easier to remember than original Markdown's rule, which
allows only the following characters to be backslash-escaped:

\`*_{}[]()>#+-.!

(However, if the markdown_strict format is used, the original Markdown
rule will be used.)

A backslash-escaped space is parsed as a nonbreaking space. In TeX
output, it will appear as ~. In HTML and XML output, it will appear as
a literal unicode nonbreaking space character (note that it will thus
actually look "invisible" in the generated HTML source; you can still
use the --ascii command-line option to make it appear as an explicit
entity).

A backslash-escaped newline (i.e. a backslash occurring at the end of a
line) is parsed as a hard line break. It will appear in TeX output as
\\ and in HTML as <br />. This is a nice alternative to Markdown's
"invisible" way of indicating hard line breaks using two trailing
spaces on a line.

Backslash escapes do not work in verbatim contexts.

Inline formatting
Emphasis
To emphasize some text, surround it with *s or _, like this:

This text is _emphasized with underscores_, and this
is *emphasized with asterisks*.

Double * or _ produces strong emphasis:

This is **strong emphasis** and __with underscores__.

A * or _ character surrounded by spaces, or backslash-escaped, will not
trigger emphasis:

This is * not emphasized *, and \*neither is this\*.

Extension: intraword_underscores
Because _ is sometimes used inside words and identifiers, pandoc does
not interpret a _ surrounded by alphanumeric characters as an emphasis
marker. If you want to emphasize just part of a word, use *:

feas*ible*, not feas*able*.

Strikeout
Extension: strikeout
To strike out a section of text with a horizontal line, begin and end
it with ~~. Thus, for example,

This ~~is deleted text.~~

Superscripts and subscripts
Extension: superscript, subscript
Superscripts may be written by surrounding the superscripted text by ^
characters; subscripts may be written by surrounding the subscripted
text by ~ characters. Thus, for example,

H~2~O is a liquid. 2^10^ is 1024.

The text between ^...^ or ~...~ may not contain spaces or newlines. If
the superscripted or subscripted text contains spaces, these spaces
must be escaped with backslashes. (This is to prevent accidental su-
perscripting and subscripting through the ordinary use of ~ and ^, and
also bad interactions with footnotes.) Thus, if you want the letter P
with `a cat' in subscripts, use P~a\ cat~, not P~a cat~.

Verbatim
To make a short span of text verbatim, put it inside backticks:

What is the difference between `>>=` and `>>`?

If the verbatim text includes a backtick, use double backticks:

Here is a literal backtick `` ` ``.

(The spaces after the opening backticks and before the closing back-
ticks will be ignored.)

The general rule is that a verbatim span starts with a string of con-
secutive backticks (optionally followed by a space) and ends with a
string of the same number of backticks (optionally preceded by a
space).

Note that backslash-escapes (and other Markdown constructs) do not work
in verbatim contexts:

This is a backslash followed by an asterisk: `\*`.

Extension: inline_code_attributes
Attributes can be attached to verbatim text, just as with fenced code
blocks:

`<$>`{.haskell}

Underline
To underline text, use the underline class:

[Underline]{.underline}

Or, without the bracketed_spans extension (but with native_spans):

<span class="underline">Underline</span>

This will work in all output formats that support underline.

Small caps
To write small caps, use the smallcaps class:

[Small caps]{.smallcaps}

Or, without the bracketed_spans extension:

<span class="smallcaps">Small caps</span>

For compatibility with other Markdown flavors, CSS is also supported:

<span style="font-variant:small-caps;">Small caps</span>

This will work in all output formats that support small caps.

Highlighting
To highlight text, use the mark class:

[Mark]{.mark}

Or, without the bracketed_spans extension (but with native_spans):

This will work in all output formats that support highlighting.

Math
Extension: tex_math_dollars
Anything between two $ characters will be treated as TeX math. The
opening $ must have a non-space character immediately to its right,
while the closing $ must have a non-space character immediately to its
left, and must not be followed immediately by a digit. Thus, $20,000
and $30,000 won't parse as math. If for some reason you need to en-
close text in literal $ characters, backslash-escape them and they
won't be treated as math delimiters.

For display math, use $$ delimiters. (In this case, the delimiters may
be separated from the formula by whitespace. However, there can be no
blank lines between the opening and closing $$ delimiters.)

TeX math will be printed in all output formats. How it is rendered de-
pends on the output format:

LaTeX It will appear verbatim surrounded by $...$ (for inline math)
or \[...\] (for display math).

Markdown, Emacs Org mode, ConTeXt, ZimWiki
It will appear verbatim surrounded by $...$ (for inline math) or
$$...$$ (for display math).

XWiki It will appear verbatim surrounded by {{formula}}..{{/formula}}.

reStructuredText
It will be rendered using an interpreted text role :math:.

AsciiDoc
For AsciiDoc output math will appear verbatim surrounded by la-
texmath:[...]. For asciidoc_legacy the bracketed material will
also include inline or display math delimiters.

Texinfo
It will be rendered inside a @math command.

roff man, Jira markup
It will be rendered verbatim without $'s.

MediaWiki, DokuWiki
It will be rendered inside <math> tags.

Textile
It will be rendered inside <span class="math"> tags.

RTF, OpenDocument
It will be rendered, if possible, using Unicode characters, and
will otherwise appear verbatim.

ODT It will be rendered, if possible, using MathML.

DocBook
If the --mathml flag is used, it will be rendered using MathML
in an inlineequation or informalequation tag. Otherwise it will
be rendered, if possible, using Unicode characters.

Docx and PowerPoint
It will be rendered using OMML math markup.

FictionBook2
If the --webtex option is used, formulas are rendered as images
using CodeCogs or other compatible web service, downloaded and
embedded in the e-book. Otherwise, they will appear verbatim.

HTML, Slidy, DZSlides, S5, EPUB
The way math is rendered in HTML will depend on the command-line
options selected. Therefore see Math rendering in HTML above.

Raw HTML
Extension: raw_html
Markdown allows you to insert raw HTML (or DocBook) anywhere in a docu-
ment (except verbatim contexts, where <, >, and & are interpreted lit-
erally). (Technically this is not an extension, since standard Mark-
down allows it, but it has been made an extension so that it can be
disabled if desired.)

The raw HTML is passed through unchanged in HTML, S5, Slidy, Slideous,
DZSlides, EPUB, Markdown, CommonMark, Emacs Org mode, and Textile out-
put, and suppressed in other formats.

For a more explicit way of including raw HTML in a Markdown document,
see the raw_attribute extension.

In the CommonMark format, if raw_html is enabled, superscripts, sub-
scripts, strikeouts and small capitals will be represented as HTML.
Otherwise, plain-text fallbacks will be used. Note that even if
raw_html is disabled, tables will be rendered with HTML syntax if they
cannot use pipe syntax.

Extension: markdown_in_html_blocks
Original Markdown allows you to include HTML "blocks": blocks of HTML
between balanced tags that are separated from the surrounding text with
blank lines, and start and end at the left margin. Within these
blocks, everything is interpreted as HTML, not Markdown; so (for exam-
ple), * does not signify emphasis.

Pandoc behaves this way when the markdown_strict format is used; but by
default, pandoc interprets material between HTML block tags as Mark-
down. Thus, for example, pandoc will turn

<table>
<tr>
<td>*one*</td>
<td>[a link](https://google.com)</td>
</tr>
</table>

into

whereas Markdown.pl will preserve it as is.

There is one exception to this rule: text between <script>, <style>,
<pre>, and <textarea> tags is not interpreted as Markdown.

This departure from original Markdown should make it easier to mix
Markdown with HTML block elements. For example, one can surround a
block of Markdown text with <div> tags without preventing it from being
interpreted as Markdown.

Extension: native_divs
Use native pandoc Div blocks for content inside <div> tags. For the
most part this should give the same output as markdown_in_html_blocks,
but it makes it easier to write pandoc filters to manipulate groups of
blocks.

Extension: native_spans
Use native pandoc Span blocks for content inside <span> tags. For the
most part this should give the same output as raw_html, but it makes it
easier to write pandoc filters to manipulate groups of inlines.

Extension: raw_tex
In addition to raw HTML, pandoc allows raw LaTeX, TeX, and ConTeXt to
be included in a document. Inline TeX commands will be preserved and
passed unchanged to the LaTeX and ConTeXt writers. Thus, for example,
you can use LaTeX to include BibTeX citations:

This result was proved in \cite{jones.1967}.

Note that in LaTeX environments, like

\begin{tabular}{|l|l|}\hline
Age & Frequency \\ \hline
18--25 & 15 \\
26--35 & 33 \\
36--45 & 22 \\ \hline
\end{tabular}

the material between the begin and end tags will be interpreted as raw
LaTeX, not as Markdown.

For a more explicit and flexible way of including raw TeX in a Markdown
document, see the raw_attribute extension.

Inline LaTeX is ignored in output formats other than Markdown, LaTeX,
Emacs Org mode, and ConTeXt.

Generic raw attribute
Extension: raw_attribute
Inline spans and fenced code blocks with a special kind of attribute
will be parsed as raw content with the designated format. For example,
the following produces a raw roff ms block:

```{=ms}
.MYMACRO
blah blah
```

And the following produces a raw html inline element:

This is `<a>html</a>`{=html}

This can be useful to insert raw xml into docx documents, e.g. a page-
break:

```{=openxml}
<w:p>
<w:r>
<w:br w:type="page"/>
</w:r>
</w:p>
```

The format name should match the target format name (see -t/--to,
above, for a list, or use pandoc --list-output-formats). Use openxml
for docx output, opendocument for odt output, html5 for epub3 output,
html4 for epub2 output, and latex, beamer, ms, or html5 for pdf output
(depending on what you use for --pdf-engine).

This extension presupposes that the relevant kind of inline code or
fenced code block is enabled. Thus, for example, to use a raw at-
tribute with a backtick code block, backtick_code_blocks must be en-
abled.

The raw attribute cannot be combined with regular attributes.

LaTeX macros
Extension: latex_macros
When this extension is enabled, pandoc will parse LaTeX macro defini-
tions and apply the resulting macros to all LaTeX math and raw LaTeX.
So, for example, the following will work in all output formats, not
just LaTeX:

\newcommand{\tuple}[1]{\langle #1 \rangle}

$\tuple{a, b, c}$

Note that LaTeX macros will not be applied if they occur inside a raw
span or block marked with the raw_attribute extension.

When latex_macros is disabled, the raw LaTeX and math will not have
macros applied. This is usually a better approach when you are target-
ing LaTeX or PDF.

Macro definitions in LaTeX will be passed through as raw LaTeX only if
latex_macros is not enabled. Macro definitions in Markdown source (or
other formats allowing raw_tex) will be passed through regardless of
whether latex_macros is enabled.

Links
Markdown allows links to be specified in several ways.

Automatic links
If you enclose a URL or email address in pointy brackets, it will be-
come a link:

<https://google.com>
<sam@green.eggs.ham>

Inline links
An inline link consists of the link text in square brackets, followed
by the URL in parentheses. (Optionally, the URL can be followed by a
link title, in quotes.)

This is an [inline link](/url), and here's [one with
a title](https://fsf.org "click here for a good time!").

There can be no space between the bracketed part and the parenthesized
part. The link text can contain formatting (such as emphasis), but the
title cannot.

Email addresses in inline links are not autodetected, so they have to
be prefixed with mailto:

[Write me!](mailto:sam@green.eggs.ham)

Reference links
An explicit reference link has two parts, the link itself and the link
definition, which may occur elsewhere in the document (either before or
after the link).

The link consists of link text in square brackets, followed by a label
in square brackets. (There cannot be space between the two unless the
spaced_reference_links extension is enabled.) The link definition con-
sists of the bracketed label, followed by a colon and a space, followed
by the URL, and optionally (after a space) a link title either in
quotes or in parentheses. The label must not be parseable as a cita-
tion (assuming the citations extension is enabled): citations take
precedence over link labels.

Here are some examples:

[my label 1]: /foo/bar.html "My title, optional"
[my label 2]: /foo
[my label 3]: https://fsf.org (The Free Software Foundation)
[my label 4]: /bar#special 'A title in single quotes'

The URL may optionally be surrounded by angle brackets:

[my label 5]: <http://foo.bar.baz>

The title may go on the next line:

[my label 3]: https://fsf.org
"The Free Software Foundation"

Note that link labels are not case sensitive. So, this will work:

Here is [my link][FOO]

[Foo]: /bar/baz

In an implicit reference link, the second pair of brackets is empty:

See [my website][].

[my website]: http://foo.bar.baz

Note: In Markdown.pl and most other Markdown implementations, reference
link definitions cannot occur in nested constructions such as list
items or block quotes. Pandoc lifts this arbitrary-seeming restric-
tion. So the following is fine in pandoc, though not in most other im-
plementations:

> My block [quote].
>
> [quote]: /foo

Extension: shortcut_reference_links
In a shortcut reference link, the second pair of brackets may be omit-
ted entirely:

See [my website].

[my website]: http://foo.bar.baz

Internal links
To link to another section of the same document, use the automatically
generated identifier (see Heading identifiers). For example:

See the [Introduction](#introduction).

See the [Introduction].

[Introduction]: #introduction

Internal links are currently supported for HTML formats (including HTML
slide shows and EPUB), LaTeX, and ConTeXt.

Images
A link immediately preceded by a ! will be treated as an image. The
link text will be used as the image's alt text:

![la lune](lalune.jpg "Voyage to the moon")

![movie reel]

[movie reel]: movie.gif

Extension: implicit_figures
An image with nonempty alt text, occurring by itself in a paragraph,
will be rendered as a figure with a caption. The image's alt text will
be used as the caption.

![This is the caption](/url/of/image.png)

How this is rendered depends on the output format. Some output formats
(e.g. RTF) do not yet support figures. In those formats, you'll just
get an image in a paragraph by itself, with no caption. For LaTeX out-
put, you can specify a figure's positioning by adding the latex-place-
ment attribute.

![This is the caption](/url/of/image.png){latex-placement="ht"}

If you just want a regular inline image, just make sure it is not the
only thing in the paragraph. One way to do this is to insert a non-
breaking space after the image:

![This image won't be a figure](/url/of/image.png)\

Note that in reveal.js slide shows, an image in a paragraph by itself
that has the r-stretch class will fill the screen, and the caption and
figure tags will be omitted.

Extension: link_attributes
Attributes can be set on links and images:

An inline ![image](foo.jpg){#id .class width=30 height=20px}
and a reference ![image][ref] with attributes.

[ref]: foo.jpg "optional title" {#id .class key=val key2="val 2"}

(This syntax is compatible with PHP Markdown Extra when only #id and
.class are used.)

For HTML and EPUB, all known HTML5 attributes except width and height
(but including srcset and sizes) are passed through as is. Unknown at-
tributes are passed through as custom attributes, with data- prepended.
The other writers ignore attributes that are not specifically supported
by their output format.

The width and height attributes on images are treated specially. When
used without a unit, the unit is assumed to be pixels. However, any of
the following unit identifiers can be used: px, cm, mm, in, inch and %.
There must not be any spaces between the number and the unit. For ex-
ample:

![](file.jpg){ width=50% }

• Dimensions may be converted to a form that is compatible with the
output format (for example, dimensions given in pixels will be con-
verted to inches when converting HTML to LaTeX). Conversion between
pixels and physical measurements is affected by the --dpi option (by
default, 96 dpi is assumed, unless the image itself contains dpi in-
formation).

• The % unit is generally relative to some available space. For exam-
ple the above example will render to the following.

• HTML: <img href="file.jpg" style="width: 50%;" />

• LaTeX: \includegraphics[width=0.5\textwidth,height=\tex-
theight]{file.jpg} (If you're using a custom template, you need to
configure graphicx as in the default template.)

• ConTeXt: \externalfigure[file.jpg][width=0.5\textwidth]

• Some output formats have a notion of a class (ConTeXt) or a unique
identifier (LaTeX \caption), or both (HTML).

• When no width or height attributes are specified, the fallback is to
look at the image resolution and the dpi metadata embedded in the im-
age file.

Divs and Spans
Using the native_divs and native_spans extensions (see above), HTML
syntax can be used as part of Markdown to create native Div and Span
elements in the pandoc AST (as opposed to raw HTML). However, there is
also nicer syntax available:

Extension: fenced_divs
Allow special fenced syntax for native Div blocks. A Div starts with a
fence containing at least three consecutive colons plus some attrib-
utes. The attributes may optionally be followed by another string of
consecutive colons.

Note: the commonmark parser doesn't permit colons after the attributes.

The attribute syntax is exactly as in fenced code blocks (see Exten-
sion: fenced_code_attributes). As with fenced code blocks, one can use
either attributes in curly braces or a single unbraced word, which will
be treated as a class name. The Div ends with another line containing
a string of at least three consecutive colons. The fenced Div should
be separated by blank lines from preceding and following blocks.

Example:

::::: {#special .sidebar}
Here is a paragraph.

And another.
:::::

Fenced divs can be nested. Opening fences are distinguished because
they must have attributes:

::: Warning ::::::
This is a warning.

::: Danger
This is a warning within a warning.
:::
::::::::::::::::::

Fences without attributes are always closing fences. Unlike with
fenced code blocks, the number of colons in the closing fence need not
match the number in the opening fence. However, it can be helpful for
visual clarity to use fences of different lengths to distinguish nested
divs from their parents.

Extension: bracketed_spans
A bracketed sequence of inlines, as one would use to begin a link, will
be treated as a Span with attributes if it is followed immediately by
attributes:

[This is *some text*]{.class key="val"}

Footnotes
Extension: footnotes
Pandoc's Markdown allows footnotes, using the following syntax:

Here is a footnote reference,[^1] and another.[^longnote]

[^1]: Here is the footnote.

[^longnote]: Here's one with multiple blocks.

Subsequent paragraphs are indented to show that they
belong to the previous footnote.

{ some.code }

The whole paragraph can be indented, or just the first
line. In this way, multi-paragraph footnotes work like
multi-paragraph list items.

This paragraph won't be part of the note, because it
isn't indented.

The identifiers in footnote references may not contain spaces, tabs,
newlines, or the characters ^, [, or ]. These identifiers are used
only to correlate the footnote reference with the note itself; in the
output, footnotes will be numbered sequentially.

The footnotes themselves need not be placed at the end of the document.
They may appear anywhere except inside other block elements (lists,
block quotes, tables, etc.). Each footnote should be separated from
surrounding content (including other footnotes) by blank lines.

Extension: inline_notes
Inline footnotes are also allowed (though, unlike regular notes, they
cannot contain multiple paragraphs). The syntax is as follows:

Here is an inline note.^[Inline notes are easier to write, since
you don't have to pick an identifier and move down to type the
note.]

Inline and regular footnotes may be mixed freely.

Citation syntax
Extension: citations
To cite a bibliographic item with an identifier foo, use the syntax
@foo. Normal citations should be included in square brackets, with
semicolons separating distinct items:

Blah blah [@doe99; @smith2000; @smith2004].

How this is rendered depends on the citation style. In an author-date
style, it might render as

Blah blah (Doe 1999, Smith 2000, 2004).

In a footnote style, it might render as

Blah blah.[^1]

[^1]: John Doe, "Frogs," *Journal of Amphibians* 44 (1999);
Susan Smith, "Flies," *Journal of Insects* (2000);
Susan Smith, "Bees," *Journal of Insects* (2004).

See the CSL user documentation for more information about CSL styles
and how they affect rendering.

Unless a citation key starts with a letter, digit, or _, and contains
only alphanumerics and single internal punctuation characters
(:.#$%&-+?<>~/), it must be surrounded by curly braces, which are not
considered part of the key. In @Foo_bar.baz., the key is Foo_bar.baz
because the final period is not internal punctuation, so it is not in-
cluded in the key. In @{Foo_bar.baz.}, the key is Foo_bar.baz., in-
cluding the final period. In @Foo_bar--baz, the key is Foo_bar because
the repeated internal punctuation characters terminate the key. The
curly braces are recommended if you use URLs as keys: [@{https://exam-
ple.com/bib?name=foobar&date=2000}, p. 33].

Citation items may optionally include a prefix, a locator, and a suf-
fix. In

Blah blah [see @doe99, pp. 33-35 and *passim*; @smith04, chap. 1].

the first item (doe99) has prefix see, locator pp. 33-35, and suffix
and *passim*. The second item (smith04) has locator chap. 1 and no
prefix or suffix.

Pandoc uses some heuristics to separate the locator from the rest of
the subject. It is sensitive to the locator terms defined in the CSL
locale files. Either abbreviated or unabbreviated forms are accepted.
In the en-US locale, locator terms can be written in either singular or
plural forms, as book, bk./bks.; chapter, chap./chaps.; column,
col./cols.; figure, fig./figs.; folio, fol./fols.; number, no./nos.;
line, l./ll.; note, n./nn.; opus, op./opp.; page, p./pp.; paragraph,
para./paras.; part, pt./pts.; section, sec./secs.; sub verbo,
s.v./s.vv.; verse, v./vv.; volume, vol./vols.; /; /. If no locator
term is used, "page" is assumed.

In complex cases, you can force something to be treated as a locator by
enclosing it in curly braces or prevent parsing the suffix as locator
by prepending curly braces:

[@smith{ii, A, D-Z}, with a suffix]
[@smith, {pp. iv, vi-xi, (xv)-(xvii)} with suffix here]
[@smith{}, 99 years later]

A minus sign (-) before the @ will suppress mention of the author in
the citation. This can be useful when the author is already mentioned
in the text:

Smith says blah [-@smith04].

You can also write an author-in-text citation, by omitting the square
brackets:

@smith04 says blah.

@smith04 [p. 33] says blah.

This will cause the author's name to be rendered, followed by the bib-
liographical details. Use this form when you want to make the citation
the subject of a sentence.

When you are using a note style, it is usually better to let citeproc
create the footnotes from citations rather than writing an explicit
note. If you do write an explicit note that contains a citation, note
that normal citations will be put in parentheses, while author-in-text
citations will not. For this reason, it is sometimes preferable to use
the author-in-text style inside notes when using a note style.

Non-default extensions
The following Markdown syntax extensions are not enabled by default in
pandoc, but may be enabled by adding +EXTENSION to the format name,
where EXTENSION is the name of the extension. Thus, for example, mark-
down+hard_line_breaks is Markdown with hard line breaks.

Extension: rebase_relative_paths
Rewrite relative paths for Markdown links and images, depending on the
path of the file containing the link or image link. For each link or
image, pandoc will compute the directory of the containing file, rela-
tive to the working directory, and prepend the resulting path to the
link or image path.

The use of this extension is best understood by example. Suppose you
have a subdirectory for each chapter of a book, chap1, chap2, chap3.
Each contains a file text.md and a number of images used in the chap-
ter. You would like to have ![image](spider.jpg) in chap1/text.md re-
fer to chap1/spider.jpg and ![image](spider.jpg) in chap2/text.md refer
to chap2/spider.jpg. To do this, use

pandoc chap*/*.md -f markdown+rebase_relative_paths

Without this extension, you would have to use ![image](chap1/spi-
der.jpg) in chap1/text.md and ![image](chap2/spider.jpg) in
chap2/text.md. Links with relative paths will be rewritten in the same
way as images.

Absolute paths and URLs are not changed. Neither are empty paths or
paths consisting entirely of a fragment, e.g., #foo.

Note that relative paths in reference links and images will be rewrit-
ten relative to the file containing the link reference definition, not
the file containing the reference link or image itself, if these dif-
fer.

Extension: mark
To highlight out a section of text, begin and end it with with ==.
Thus, for example,

This ==is deleted text.==

Extension: attributes
Allows attributes to be attached to any inline or block-level element
when parsing commonmark. The syntax for the attributes is the same as
that used in header_attributes.

• Attributes that occur immediately after an inline element affect that
element. If they follow a space, then they belong to the space.
(Hence, this option subsumes inline_code_attributes and link_attrib-
utes.)

• Attributes that occur immediately before a block element, on a line
by themselves, affect that element.

• Consecutive attribute specifiers may be used, either for blocks or
for inlines. Their attributes will be combined.

• Attributes that occur at the end of the text of a Setext or ATX head-
ing (separated by whitespace from the text) affect the heading ele-
ment. (Hence, this option subsumes header_attributes.)

• Attributes that occur after the opening fence in a fenced code block
affect the code block element. (Hence, this option subsumes
fenced_code_attributes.)

• Attributes that occur at the end of a reference link definition af-
fect links that refer to that definition.

Note that pandoc's AST does not currently allow attributes to be at-
tached to arbitrary elements. Hence a Span or Div container will be
added if needed.

Extension: old_dashes
Selects the pandoc <= 1.8.2.1 behavior for parsing smart dashes: - be-
fore a numeral is an en-dash, and -- is an em-dash. This option only
has an effect if smart is enabled. It is selected automatically for
textile input.

Extension: angle_brackets_escapable
Allow < and > to be backslash-escaped, as they can be in GitHub fla-
vored Markdown but not original Markdown. This is implied by pandoc's
default all_symbols_escapable.

Extension: lists_without_preceding_blankline
Allow a list to occur right after a paragraph, with no intervening
blank space.

Extension: four_space_rule
Selects the pandoc <= 2.0 behavior for parsing lists, so that four
spaces indent are needed for list item continuation paragraphs.

Extension: spaced_reference_links
Allow whitespace between the two components of a reference link, for
example,

[foo] [bar].

Extension: hard_line_breaks
Causes all newlines within a paragraph to be interpreted as hard line
breaks instead of spaces.

Extension: ignore_line_breaks
Causes newlines within a paragraph to be ignored, rather than being
treated as spaces or as hard line breaks. This option is intended for
use with East Asian languages where spaces are not used between words,
but text is divided into lines for readability.

Extension: east_asian_line_breaks
Causes newlines within a paragraph to be ignored, rather than being
treated as spaces or as hard line breaks, when they occur between two
East Asian wide characters. This is a better choice than ig-
nore_line_breaks for texts that include a mix of East Asian wide char-
acters and other characters.

Extension: emoji
Parses textual emojis like :smile: as Unicode emoticons.

Extension: tex_math_gfm
Supports two GitHub-specific formats for math. Inline math:
$`e=mc^2`$.

Display math:

``` math
e=mc^2
```

Extension: tex_math_single_backslash
Causes anything between $ and $ to be interpreted as inline TeX math,
and anything between \[ and \] to be interpreted as display TeX math.
Note: a drawback of this extension is that it precludes escaping ( and
[.

Extension: tex_math_double_backslash
Causes anything between \$ and \$ to be interpreted as inline TeX
math, and anything between \\[ and \\] to be interpreted as display TeX
math.

Extension: markdown_attribute
By default, pandoc interprets material inside block-level tags as Mark-
down. This extension changes the behavior so that Markdown is only
parsed inside block-level tags if the tags have the attribute mark-
down=1.

Extension: mmd_title_block
Enables a MultiMarkdown style title block at the top of the document,
for example:

Title: My title
Author: John Doe
Date: September 1, 2008
Comment: This is a sample mmd title block, with
a field spanning multiple lines.

See the MultiMarkdown documentation for details. If pandoc_title_block
or yaml_metadata_block is enabled, it will take precedence over mmd_ti-
tle_block.

Extension: abbreviations
Parses PHP Markdown Extra abbreviation keys, like

*[HTML]: Hypertext Markup Language

Note that the pandoc document model does not support abbreviations, so
if this extension is enabled, abbreviation keys are simply skipped (as
opposed to being parsed as paragraphs).

Extension: alerts
Supports GitHub-style Markdown alerts, like

> [!TIP]
> Helpful advice for doing things better or more easily.

Note: This extension currently only works with commonmark: commonmark,
gfm, commonmark_x.

Extension: autolink_bare_uris
Makes all absolute URIs into links, even when not surrounded by pointy
braces <...>.

Extension: mmd_link_attributes
Parses MultiMarkdown-style key-value attributes on link and image ref-
erences. This extension should not be confused with the link_attrib-
utes extension.

This is a reference ![image][ref] with MultiMarkdown attributes.

[ref]: https://path.to/image "Image title" width=20px height=30px
id=myId class="myClass1 myClass2"

Extension: mmd_header_identifiers
Parses MultiMarkdown-style heading identifiers (in square brackets, af-
ter the heading but before any trailing #s in an ATX heading).

Extension: gutenberg
Use Project Gutenberg conventions for plain output: all-caps for strong
emphasis, surround by underscores for regular emphasis, add extra blank
space around headings.

Extension: sourcepos
Include source position attributes when parsing commonmark. For ele-
ments that accept attributes, a data-pos attribute is added; other ele-
ments are placed in a surrounding Div or Span element with a data-pos
attribute.

Extension: short_subsuperscripts
Parse MultiMarkdown-style subscripts and superscripts, which start with
a `~' or `^' character, respectively, and include the alphanumeric se-
quence that follows. For example:

x^2 = 4

Oxygen is O~2.

Extension: wikilinks_title_after_pipe
Pandoc supports multiple Markdown wikilink syntaxes, regardless of
whether the title is before or after the pipe.

Using --from=markdown+wikilinks_title_after_pipe results in

[[URL|title]]

while using --from=markdown+wikilinks_title_before_pipe results in

[[title|URL]]

Markdown variants
In addition to pandoc's extended Markdown, the following Markdown vari-
ants are supported:

• markdown_phpextra (PHP Markdown Extra)

• markdown_github (deprecated GitHub-Flavored Markdown)

• markdown_mmd (MultiMarkdown)

• markdown_strict (Markdown.pl)

• commonmark (CommonMark)

• gfm (Github-Flavored Markdown)

• commonmark_x (CommonMark with many pandoc extensions)

To see which extensions are supported for a given format, and which are
enabled by default, you can use the command

pandoc --list-extensions=FORMAT

where FORMAT is replaced with the name of the format.

Note that the list of extensions for commonmark, gfm, and commonmark_x
are defined relative to default commonmark. So, for example, back-
tick_code_blocks does not appear as an extension, since it is enabled
by default and cannot be disabled.

CITATIONS
When the --citeproc option is used, pandoc can automatically generate
citations and a bibliography in a number of styles. Basic usage is

pandoc --citeproc myinput.txt

To use this feature, you will need to have

• a document containing citations (see Citation syntax);

• a source of bibliographic data: either an external bibliography file
or a list of references in the document's YAML metadata;

• optionally, a CSL citation style.

Specifying bibliographic data
You can specify an external bibliography using the bibliography meta-
data field in a YAML metadata section or the --bibliography command
line argument. If you want to use multiple bibliography files, you can
supply multiple --bibliography arguments or set bibliography metadata
field to YAML array. A bibliography may have any of these formats:

Format File extension
---------- ----------------
BibLaTeX .bib
BibTeX .bibtex
CSL JSON .json
CSL YAML .yaml
RIS .ris

Note that .bib can be used with both BibTeX and BibLaTeX files; use the
extension .bibtex to force interpretation as BibTeX.

In BibTeX and BibLaTeX databases, pandoc parses LaTeX markup inside
fields such as title; in CSL YAML databases, pandoc Markdown; and in
CSL JSON databases, an HTML-like markup:

<i>...</i>
italics

<b>...</b>
bold

<span style="font-variant:small-caps;">...</span> or <sc>...</sc>
small capitals

<sub>...</sub>
subscript

<sup>...</sup>
superscript

<span class="nocase">...</span>
prevent a phrase from being capitalized as title case

As an alternative to specifying a bibliography file using --bibliogra-
phy or the YAML metadata field bibliography, you can include the cita-
tion data directly in the references field of the document's YAML meta-
data. The field should contain an array of YAML-encoded references,
for example:

---
references:
- type: article-journal
id: WatsonCrick1953
author:
- family: Watson
given: J. D.
- family: Crick
given: F. H. C.
issued:
date-parts:
- - 1953
- 4
- 25
title: 'Molecular structure of nucleic acids: a structure for
deoxyribose nucleic acid'
title-short: Molecular structure of nucleic acids
container-title: Nature
volume: 171
issue: 4356
page: 737-738
DOI: 10.1038/171737a0
URL: https://www.nature.com/articles/171737a0
language: en-GB
...

If both an external bibliography and inline (YAML metadata) references
are provided, both will be used. In case of conflicting ids, the in-
line references will take precedence.

Note that pandoc can be used to produce such a YAML metadata section
from a BibTeX, BibLaTeX, or CSL JSON bibliography:

pandoc chem.bib -s -f biblatex -t markdown
pandoc chem.json -s -f csljson -t markdown

Indeed, pandoc can convert between any of these citation formats:

pandoc chem.bib -s -f biblatex -t csljson
pandoc chem.yaml -s -f markdown -t biblatex

Running pandoc on a bibliography file with the --citeproc option will
create a formatted bibliography in the format of your choice:

pandoc chem.bib -s --citeproc -o chem.html
pandoc chem.bib -s --citeproc -o chem.pdf

Capitalization in titles
If you are using a bibtex or biblatex bibliography, then observe the
following rules:

• English titles should be in title case. Non-English titles should be
in sentence case, and the langid field in biblatex should be set to
the relevant language. (The following values are treated as English:
american, british, canadian, english, australian, newzealand, USeng-
lish, or UKenglish.)

• As is standard with bibtex/biblatex, proper names should be protected
with curly braces so that they won't be lowercased in styles that
call for sentence case. For example:

title = {My Dinner with {Andre}}

• In addition, words that should remain lowercase (or camelCase) should
be protected:

title = {Spin Wave Dispersion on the {nm} Scale}

Though this is not necessary in bibtex/biblatex, it is necessary with
citeproc, which stores titles internally in sentence case, and con-
verts to title case in styles that require it. Here we protect "nm"
so that it doesn't get converted to "Nm" at this stage.

If you are using a CSL bibliography (either JSON or YAML), then observe
the following rules:

• All titles should be in sentence case.

• Use the language field for non-English titles to prevent their con-
version to title case in styles that call for this. (Conversion hap-
pens only if language begins with en or is left empty.)

• Protect words that should not be converted to title case using this
syntax:

Spin wave dispersion on the <span class="nocase">nm</span> scale

Conference Papers, Published vs. Unpublished
For a formally published conference paper, use the biblatex entry type
inproceedings (which will be mapped to CSL paper-conference).

For an unpublished manuscript, use the biblatex entry type unpublished
without an eventtitle field (this entry type will be mapped to CSL man-
uscript).

For a talk, an unpublished conference paper, or a poster presentation,
use the biblatex entry type unpublished with an eventtitle field (this
entry type will be mapped to CSL speech). Use the biblatex type field
to indicate the type, e.g. "Paper", or "Poster". venue and eventdate
may be useful too, though eventdate will not be rendered by most CSL
styles. Note that venue is for the event's venue, unlike location
which describes the publisher's location; do not use the latter for an
unpublished conference paper.

Specifying a citation style
Citations and references can be formatted using any style supported by
the Citation Style Language, listed in the Zotero Style Repository.
These files are specified using the --csl option or the csl (or cita-
tion-style) metadata field. By default, pandoc will use the Chicago
Manual of Style author-date format. (You can override this default by
copying a CSL style of your choice to default.csl in your user data di-
rectory.) The CSL project provides further information on finding and
editing styles.

The --citation-abbreviations option (or the citation-abbreviations
metadata field) may be used to specify a JSON file containing abbrevia-
tions of journals that should be used in formatted bibliographies when
form="short" is specified. The format of the file can be illustrated
with an example:

{ "default": {
"container-title": {
"Lloyd's Law Reports": "Lloyd's Rep",
"Estates Gazette": "EG",
"Scots Law Times": "SLT"
}
}
}

Citations in note styles
Pandoc's citation processing is designed to allow you to move between
author-date, numerical, and note styles without modifying the Markdown
source. When you're using a note style, avoid inserting footnotes man-
ually. Instead, insert citations just as you would in an author-date
style--for example,

Blah blah [@foo, p. 33].

The footnote will be created automatically. Pandoc will take care of
removing the space and moving the note before or after the period, de-
pending on the setting of notes-after-punctuation, as described below
in Other relevant metadata fields.

In some cases you may need to put a citation inside a regular footnote.
Normal citations in footnotes (such as [@foo, p. 33]) will be rendered
in parentheses. In-text citations (such as @foo [p. 33]) will be ren-
dered without parentheses. (A comma will be added if appropriate.)
Thus:

[^1]: Some studies [@foo; @bar, p. 33] show that
frubulicious zoosnaps are quantical. For a survey
of the literature, see @baz [chap. 1].

Placement of the bibliography
If the style calls for a list of works cited, it will be placed in a
div with id refs, if one exists:

::: {#refs}
:::

Otherwise, it will be placed at the end of the document. Generation of
the bibliography can be suppressed by setting suppress-bibliography:
true in the YAML metadata.

If you wish the bibliography to have a section heading, you can set
reference-section-title in the metadata, or put the heading at the be-
ginning of the div with id refs (if you are using it) or at the end of
your document:

last paragraph...

# References

The bibliography will be inserted after this heading. Note that the
unnumbered class will be added to this heading, so that the section
will not be numbered.

If you want to put the bibliography into a variable in your template,
one way to do that is to put the div with id refs into a metadata
field, e.g.

---
refs: |
::: {#refs}
:::
...

You can then put the variable $refs$ into your template where you want
the bibliography to be placed.

Including uncited items in the bibliography
If you want to include items in the bibliography without actually cit-
ing them in the body text, you can define a dummy nocite metadata field
and put the citations there:

---
nocite: |
@item1, @item2
...

@item3

In this example, the document will contain a citation for item3 only,
but the bibliography will contain entries for item1, item2, and item3.

It is possible to create a bibliography with all the citations, whether
or not they appear in the document, by using a wildcard:

---
nocite: |
@*
...

For LaTeX output, you can also use natbib or biblatex to render the
bibliography. In order to do so, specify bibliography files as out-
lined above, and add --natbib or --biblatex argument to pandoc invoca-
tion. Bear in mind that bibliography files have to be in either BibTeX
(for --natbib) or BibLaTeX (for --biblatex) format.

Other relevant metadata fields
A few other metadata fields affect bibliography formatting:

link-citations
If true, citations will be hyperlinked to the corresponding bib-
liography entries (for author-date and numerical styles only).
Defaults to false.

link-bibliography
If true, DOIs, PMCIDs, PMID, and URLs in bibliographies will be
rendered as hyperlinks. (If an entry contains a DOI, PMCID,
PMID, or URL, but none of these fields are rendered by the
style, then the title, or in the absence of a title the whole
entry, will be hyperlinked.) Defaults to true.

lang The lang field will affect how the style is localized, for exam-
ple in the translation of labels, the use of quotation marks,
and the way items are sorted. (For backwards compatibility, lo-
cale may be used instead of lang, but this use is deprecated.)
A BCP 47 language tag is expected: for example, en, de, en-US,
fr-CA, ug-Cyrl. The unicode extension syntax (after -u-) may be
used to specify options for collation (sorting) more precisely.
Here are some examples:

• zh-u-co-pinyin: Chinese with the Pinyin collation.

• es-u-co-trad: Spanish with the traditional collation (with Ch
sorting after C).

• fr-u-kb: French with "backwards" accent sorting (with cot
sorting after cte).

• en-US-u-kf-upper: English with uppercase letters sorting be-
fore lower (default is lower before upper).

notes-after-punctuation
If true (the default for note styles), pandoc will put footnote
references or superscripted numerical citations after following
punctuation. For example, if the source contains blah blah
[@jones99]., the result will look like blah blah.[^1], with the
note moved after the period and the space collapsed. If false,
the space will still be collapsed, but the footnote will not be
moved after the punctuation. The option may also be used in nu-
merical styles that use superscripts for citation numbers (but
for these styles the default is not to move the citation).

SLIDE SHOWS
You can use pandoc to produce an HTML + JavaScript slide presentation
that can be viewed via a web browser. There are five ways to do this,
using S5, DZSlides, Slidy, Slideous, or reveal.js. You can also pro-
duce a PDF slide show using LaTeX beamer, or slide shows in Microsoft
PowerPoint format.

Here's the Markdown source for a simple slide show, habits.txt:

% Habits
% John Doe
% March 22, 2005

# In the morning

## Getting up

- Turn off alarm
- Get out of bed

## Breakfast

- Eat eggs
- Drink coffee

# In the evening

## Dinner

- Eat spaghetti
- Drink wine

------------------

![picture of spaghetti](images/spaghetti.jpg)

## Going to sleep

- Get in bed
- Count sheep

To produce an HTML/JavaScript slide show, simply type

pandoc -t FORMAT -s habits.txt -o habits.html

where FORMAT is either s5, slidy, slideous, dzslides, or revealjs.

For Slidy, Slideous, reveal.js, and S5, the file produced by pandoc
with the -s/--standalone option embeds a link to JavaScript and CSS
files, which are assumed to be available at the relative path s5/de-
fault (for S5), slideous (for Slideous), reveal.js (for reveal.js), or
at the Slidy website at w3.org (for Slidy). (These paths can be
changed by setting the slidy-url, slideous-url, revealjs-url, or s5-url
variables; see Variables for HTML slides, above.) For DZSlides, the
(relatively short) JavaScript and CSS are included in the file by de-
fault.

With all HTML slide formats, the --self-contained option can be used to
produce a single file that contains all of the data necessary to dis-
play the slide show, including linked scripts, stylesheets, images, and
videos.

To produce a PDF slide show using beamer, type

pandoc -t beamer habits.txt -o habits.pdf

Note that a reveal.js slide show can also be converted to a PDF by
printing it to a file from the browser.

To produce a PowerPoint slide show, type

pandoc habits.txt -o habits.pptx

Structuring the slide show
By default, the slide level is the highest heading level in the hierar-
chy that is followed immediately by content, and not another heading,
somewhere in the document. In the example above, level-1 headings are
always followed by level-2 headings, which are followed by content, so
the slide level is 2. This default can be overridden using the
--slide-level option.

The document is carved up into slides according to the following rules:

• A horizontal rule always starts a new slide.

• A heading at the slide level always starts a new slide.

• Headings below the slide level in the hierarchy create headings
within a slide. (In beamer, a "block" will be created. If the head-
ing has the class example, an exampleblock environment will be used;
if it has the class alert, an alertblock will be used; otherwise a
regular block will be used.)

• Headings above the slide level in the hierarchy create "title
slides," which just contain the section title and help to break the
slide show into sections. Non-slide content under these headings
will be included on the title slide (for HTML slide shows) or in a
subsequent slide with the same title (for beamer).

• A title page is constructed automatically from the document's title
block, if present. (In the case of beamer, this can be disabled by
commenting out some lines in the default template.)

These rules are designed to support many different styles of slide
show. If you don't care about structuring your slides into sections
and subsections, you can either just use level-1 headings for all
slides (in that case, level 1 will be the slide level) or you can set
--slide-level=0.

Note: in reveal.js slide shows, if slide level is 2, a two-dimensional
layout will be produced, with level-1 headings building horizontally
and level-2 headings building vertically. It is not recommended that
you use deeper nesting of section levels with reveal.js unless you set
--slide-level=0 (which lets reveal.js produce a one-dimensional layout
and only interprets horizontal rules as slide boundaries).

PowerPoint layout choice
When creating slides, the pptx writer chooses from a number of pre-de-
fined layouts, based on the content of the slide:

Title Slide
This layout is used for the initial slide, which is generated
and filled from the metadata fields date, author, and title, if
they are present.

Section Header
This layout is used for what pandoc calls "title slides", i.e.
slides which start with a header which is above the slide level
in the hierarchy.

Two Content
This layout is used for two-column slides, i.e. slides contain-
ing a div with class columns which contains at least two divs
with class column.

Comparison
This layout is used instead of "Two Content" for any two-column
slides in which at least one column contains text followed by
non-text (e.g. an image or a table).

Content with Caption
This layout is used for any non-two-column slides which contain
text followed by non-text (e.g. an image or a table).

Blank This layout is used for any slides which only contain blank con-
tent, e.g. a slide containing only speaker notes, or a slide
containing only a non-breaking space.

Title and Content
This layout is used for all slides which do not match the crite-
ria for another layout.

These layouts are chosen from the default pptx reference doc included
with pandoc, unless an alternative reference doc is specified using
--reference-doc.

Incremental lists
By default, these writers produce lists that display "all at once." If
you want your lists to display incrementally (one item at a time), use
the -i option. If you want a particular list to depart from the de-
fault, put it in a div block with class incremental or nonincremental.
So, for example, using the fenced div syntax, the following would be
incremental regardless of the document default:

::: incremental

- Eat spaghetti
- Drink wine

:::

::: nonincremental

- Eat spaghetti
- Drink wine

:::

While using incremental and nonincremental divs is the recommended
method of setting incremental lists on a per-case basis, an older
method is also supported: putting lists inside a blockquote will depart
from the document default (that is, it will display incrementally with-
out the -i option and all at once with the -i option):

> - Eat spaghetti
> - Drink wine

Both methods allow incremental and nonincremental lists to be mixed in
a single document.

If you want to include a block-quoted list, you can work around this
behavior by putting the list inside a fenced div, so that it is not the
direct child of the block quote:

> ::: wrapper
> - a
> - list in a quote
> :::

Inserting pauses
You can add "pauses" within a slide by including a paragraph containing
three dots, separated by spaces:

# Slide with a pause

content before the pause

. . .

content after the pause

Note: this feature is not yet implemented for PowerPoint output.

Styling the slides
You can change the style of HTML slides by putting customized CSS files
in $DATADIR/s5/default (for S5), $DATADIR/slidy (for Slidy), or
$DATADIR/slideous (for Slideous), where $DATADIR is the user data di-
rectory (see --data-dir, above). The originals may be found in pan-
doc's system data directory (generally $CABALDIR/pandoc-VERSION/s5/de-
fault). Pandoc will look there for any files it does not find in the
user data directory.

For dzslides, the CSS is included in the HTML file itself, and may be
modified there.

All reveal.js configuration options can be set through variables. For
example, themes can be used by setting the theme variable:

-V theme=moon

Or you can specify a custom stylesheet using the --css option.

To style beamer slides, you can specify a theme, colortheme, fonttheme,
innertheme, and outertheme, using the -V option:

pandoc -t beamer habits.txt -V theme:Warsaw -o habits.pdf

Note that heading attributes will turn into slide attributes (on a
<div> or <section>) in HTML slide formats, allowing you to style indi-
vidual slides. In beamer, a number of heading classes and attributes
are recognized as frame options and will be passed through as options
to the frame: see Frame attributes in beamer, below.

Speaker notes
Speaker notes are supported in reveal.js, PowerPoint (pptx), and beamer
output. You can add notes to your Markdown document thus:

::: notes

This is my note.

- It can contain Markdown
- like this list

:::

To show the notes window in reveal.js, press s while viewing the pre-
sentation. Speaker notes in PowerPoint will be available, as usual, in
handouts and presenter view.

Notes are not yet supported for other slide formats, but the notes will
not appear on the slides themselves.

Columns
To put material in side by side columns, you can use a native div con-
tainer with class columns, containing two or more div containers with
class column and a width attribute:

:::::::::::::: {.columns}
::: {.column width="40%"}
contents...
:::
::: {.column width="60%"}
contents...
:::
::::::::::::::

Note: Specifying column widths does not currently work for PowerPoint.

Additional columns attributes in beamer
The div containers with classes columns and column can optionally have
an align attribute. The class columns can optionally have a totalwidth
attribute or an onlytextwidth class.

:::::::::::::: {.columns align=center totalwidth=8em}
::: {.column width="40%"}
contents...
:::
::: {.column width="60%" align=bottom}
contents...
:::
::::::::::::::

The align attributes on columns and column can be used with the values
top, top-baseline, center and bottom to vertically align the columns.
It defaults to top in columns.

The totalwidth attribute limits the width of the columns to the given
value.

:::::::::::::: {.columns align=top .onlytextwidth}
::: {.column width="40%" align=center}
contents...
:::
::: {.column width="60%"}
contents...
:::
::::::::::::::

The class onlytextwidth sets the totalwidth to \textwidth.

See Section 12.7 of the Beamer User's Guide for more details.

Frame attributes in beamer
Sometimes it is necessary to add the LaTeX [fragile] option to a frame
in beamer (for example, when using the minted environment). This can
be forced by adding the fragile class to the heading introducing the
slide:

# Fragile slide {.fragile}

All of the other frame attributes described in Section 8.1 of the
Beamer User's Guide may also be used: allowdisplaybreaks, allowframe-
breaks, b, c, s, t, environment, label, plain, shrink, standout, nofra-
menumbering, squeeze. allowframebreaks is recommended especially for
bibliographies, as it allows multiple slides to be created if the con-
tent overfills the frame:

# References {.allowframebreaks}

In addition, the frameoptions attribute may be used to pass arbitrary
frame options to a beamer slide:

# Heading {frameoptions="squeeze,shrink,customoption=foobar"}

Background in reveal.js, beamer, and pptx
Background images can be added to self-contained reveal.js slide shows,
beamer slide shows, and pptx slide shows.

On all slides (beamer, reveal.js, pptx)
With beamer and reveal.js, the configuration option background-image
can be used either in the YAML metadata block or as a command-line
variable to get the same image on every slide.

Note that for reveal.js, the background-image will be used as a paral-
laxBackgroundImage (see below).

For pptx, you can use a --reference-doc in which background images have
been set on the relevant layouts.

parallaxBackgroundImage (reveal.js)
For reveal.js, there is also the reveal.js-native option parallaxBack-
groundImage, which produces a parallax scrolling background. You must
also set parallaxBackgroundSize, and can optionally set parallaxBack-
groundHorizontal and parallaxBackgroundVertical to configure the
scrolling behaviour. See the reveal.js documentation for more details
about the meaning of these options.

In reveal.js's overview mode, the parallaxBackgroundImage will show up
only on the first slide.

On individual slides (reveal.js, pptx)
To set an image for a particular reveal.js or pptx slide, add {back-
ground-image="/path/to/image"} to the first slide-level heading on the
slide (which may even be empty).

As the HTML writers pass unknown attributes through, other reveal.js
background settings also work on individual slides, including back-
ground-size, background-repeat, background-color, transition, and tran-
sition-speed. (The data- prefix will automatically be added.)

Note: data-background-image is also supported in pptx for consistency
with reveal.js - if background-image isn't found, data-background-image
will be checked.

On the title slide (reveal.js, pptx)
To add a background image to the automatically generated title slide
for reveal.js, use the title-slide-attributes variable in the YAML
metadata block. It must contain a map of attribute names and values.
(Note that the data- prefix is required here, as it isn't added auto-
matically.)

For pptx, pass a --reference-doc with the background image set on the
"Title Slide" layout.

Example (reveal.js)
---
title: My Slide Show
parallaxBackgroundImage: /path/to/my/background_image.png
title-slide-attributes:
data-background-image: /path/to/title_image.png
data-background-size: contain
---

## Slide One

Slide 1 has background_image.png as its background.

## {background-image="/path/to/special_image.jpg"}

Slide 2 has a special image for its background, even though the heading has no content.

EPUBS
EPUB Metadata
There are two ways to specify metadata for an EPUB. The first is to
use the --epub-metadata option, which takes as its argument an XML file
with Dublin Core elements.

The second way is to use YAML, either in a YAML metadata block in a
Markdown document, or in a separate YAML file specified with --meta-
data-file. Here is an example of a YAML metadata block with EPUB meta-
data:

---
title:
- type: main
text: My Book
- type: subtitle
text: An investigation of metadata
creator:
- role: author
text: John Smith
- role: editor
text: Sarah Jones
identifier:
- scheme: DOI
text: doi:10.234234.234/33
publisher: My Press
rights: 2007 John Smith, CC BY-NC
ibooks:
version: 1.3.4
...

The following fields are recognized:

identifier
Either a string value or an object with fields text and scheme.
Valid values for scheme are ISBN-10, GTIN-13, UPC, ISMN-10, DOI,
LCCN, GTIN-14, ISBN-13, Legal deposit number, URN, OCLC,
ISMN-13, ISBN-A, JP, OLCC.

title Either a string value, or an object with fields file-as and
type, or a list of such objects. Valid values for type are
main, subtitle, short, collection, edition, extended.

creator
Either a string value, or an object with fields role, file-as,
and text, or a list of such objects. Valid values for role are
MARC relators, but pandoc will attempt to translate the hu-
man-readable versions (like "author" and "editor") to the appro-
priate marc relators.

contributor
Same format as creator.

date A string value in YYYY-MM-DD format. (Only the year is neces-
sary.) Pandoc will attempt to convert other common date for-
mats.

lang (or legacy: language)
A string value in BCP 47 format. Pandoc will default to the lo-
cal language if nothing is specified.

subject
Either a string value, or an object with fields text, authority,
and term, or a list of such objects. Valid values for authority
are either a reserved authority value (currently AAT, BIC,
BISAC, CLC, DDC, CLIL, EuroVoc, MEDTOP, LCSH, NDC, Thema, UDC,
and WGS) or an absolute IRI identifying a custom scheme. Valid
values for term are defined by the scheme.

description
A string value.

type A string value.

format A string value.

relation
A string value.

coverage
A string value.

rights A string value.

belongs-to-collection
A string value. Identifies the name of a collection to which
the EPUB Publication belongs.

group-position
The group-position field indicates the numeric position in which
the EPUB Publication belongs relative to other works belonging
to the same belongs-to-collection field.

cover-image
A string value (path to cover image).

css (or legacy: stylesheet)
A string value (path to CSS stylesheet).

page-progression-direction
Either ltr or rtl. Specifies the page-progression-direction at-
tribute for the spine element.

accessModes
An array of strings (schema). Defaults to ["textual"].

accessModeSufficient
An array of strings (schema). Defaults to ["textual"].

accessibilityHazards
An array of strings (schema). Defaults to ["none"].

accessibilityFeatures
An array of strings (schema). Defaults to

- "alternativeText"
- "readingOrder"
- "structuralNavigation"
- "tableOfContents"

accessibilitySummary
A string value.

ibooks iBooks-specific metadata, with the following fields:

• version: (string)

• specified-fonts: true|false (default false)

• ipad-orientation-lock: portrait-only|landscape-only

• iphone-orientation-lock: portrait-only|landscape-only

• binding: true|false (default true)

• scroll-axis: vertical|horizontal|default

The epub:type attribute
For epub3 output, you can mark up the heading that corresponds to an
EPUB chapter using the epub:type attribute. For example, to set the
attribute to the value prologue, use this Markdown:

# My chapter {epub:type=prologue}

Which will result in:

<body epub:type="frontmatter">
<section epub:type="prologue">
<h1>My chapter</h1>

Pandoc will output <body epub:type="bodymatter">, unless you use one of
the following values, in which case either frontmatter or backmatter
will be output.

epub:type of first section epub:type of body
---------------------------- -------------------
prologue frontmatter
abstract frontmatter
acknowledgments frontmatter
copyright-page frontmatter
dedication frontmatter
credits frontmatter
keywords frontmatter
imprint frontmatter
contributors frontmatter
other-credits frontmatter
errata frontmatter
revision-history frontmatter
titlepage frontmatter
halftitlepage frontmatter
seriespage frontmatter
foreword frontmatter
preface frontmatter
frontispiece frontmatter
appendix backmatter
colophon backmatter
bibliography backmatter
index backmatter

Linked media
By default, pandoc will download media referenced from any <img>, <au-
dio>, <video> or <source> element present in the generated EPUB, and
include it in the EPUB container, yielding a completely self-contained
EPUB. If you want to link to external media resources instead, use raw
HTML in your source and add data-external="1" to the tag with the src
attribute. For example:

If the input format already is HTML then data-external="1" will work as
expected for <img> elements. Similarly, for Markdown, external images
can be declared with ![img](url){external=1}. Note that this only
works for images; the other media elements have no native representa-
tion in pandoc's AST and require the use of raw HTML.

EPUB styling
By default, pandoc will include some basic styling contained in its
epub.css data file. (To see this, use pandoc --print-default-data-file
epub.css.) To use a different CSS file, just use the --css command
line option. A few inline styles are defined in addition; these are
essential for correct formatting of pandoc's HTML output.

The document-css variable may be set if the more opinionated styling of
pandoc's default HTML templates is desired (and in that case the vari-
ables defined in Variables for HTML may be used to fine-tune the
style).

CHUNKED HTML
pandoc -t chunkedhtml will produce a zip archive of linked HTML files,
one for each section of the original document. Internal links will au-
tomatically be adjusted to point to the right place, images linked to
under the working directory will be incorporated, and navigation links
will be added. In addition, a JSON file sitemap.json will be included
describing the hierarchical structure of the files.

If an output file without an extension is specified, then it will be
interpreted as a directory and the zip archive will be automatically
unpacked into it (unless it already exists, in which case an error will
be raised). Otherwise a .zip file will be produced.

The navigation links can be customized by adjusting the template. By
default, a table of contents is included only on the top page. To in-
clude it on every page, set the toc variable manually.

JUPYTER NOTEBOOKS
When creating a Jupyter notebook, pandoc will try to infer the notebook
structure. Code blocks with the class code will be taken as code
cells, and intervening content will be taken as Markdown cells. At-
tachments will automatically be created for images in Markdown cells.
Metadata will be taken from the jupyter metadata field. For example:

---
title: My notebook
jupyter:
nbformat: 4
nbformat_minor: 5
kernelspec:
display_name: Python 2
language: python
name: python2
language_info:
codemirror_mode:
name: ipython
version: 2
file_extension: ".py"
mimetype: "text/x-python"
name: "python"
nbconvert_exporter: "python"
pygments_lexer: "ipython2"
version: "2.7.15"
---

# Lorem ipsum

**Lorem ipsum** dolor sit amet, consectetur adipiscing elit. Nunc luctus
bibendum felis dictum sodales.

``` code
print("hello")
```

## Pyout

``` code
from IPython.display import HTML
HTML("""
<script>
console.log("hello");
</script>
<b>HTML</b>
""")
```

## Image

This image ![image](myimage.png) will be
included as a cell attachment.

If you want to add cell attributes, group cells differently, or add
output to code cells, then you need to include divs to indicate the
structure. You can use either fenced divs or native divs for this.
Here is an example:

:::::: {.cell .markdown}
# Lorem

**Lorem ipsum** dolor sit amet, consectetur adipiscing elit. Nunc luctus
bibendum felis dictum sodales.
::::::

:::::: {.cell .code execution_count=1}
``` {.python}
print("hello")
```

::: {.output .stream .stdout}
```
hello
```
:::
::::::

:::::: {.cell .code execution_count=2}
``` {.python}
from IPython.display import HTML
HTML("""
<script>
console.log("hello");
</script>
<b>HTML</b>
""")
```

::: {.output .execute_result execution_count=2}
```{=html}
<script>
console.log("hello");
</script>
<b>HTML</b>
hello
```
:::
::::::

If you include raw HTML or TeX in an output cell, use the raw at-
tribute, as shown in the last cell of the example above. Although pan-
doc can process "bare" raw HTML and TeX, the result is often inter-
spersed raw elements and normal textual elements, and in an output cell
pandoc expects a single, connected raw block. To avoid using raw HTML
or TeX except when marked explicitly using raw attributes, we recommend
specifying the extensions -raw_html-raw_tex+raw_attribute when trans-
lating between Markdown and ipynb notebooks.

Note that options and extensions that affect reading and writing of
Markdown will also affect Markdown cells in ipynb notebooks. For exam-
ple, --wrap=preserve will preserve soft line breaks in Markdown cells;
--markdown-headings=setext will cause Setext-style headings to be used;
and --preserve-tabs will prevent tabs from being turned to spaces.

VIMDOC
Vimdoc writer generates Vim help files and makes use of the following
metadata variables:

abstract: "A short description"
author: Author
title: Title

# Vimdoc-specific
filename: "definition-lists.txt"
vimdoc-prefix: pandoc

Complete header requires abstract, author, title and filename to be
set. Compiling file with such metadata produces the following file
(assumes --standalone, see Templates):

*definition-lists.txt* A short description

Title by Author

Type |gO| to see the table of contents.

[...]

vim:tw=72:sw=4:ts=4:ft=help:norl:et:

If vimdoc-prefix is set, all non-command tags are prefixed with its
value, it is used to prevent tag collision: all headers have a tag (ei-
ther inferred or explicit) and multiple help pages can have the same
header names, therefore collision is to be expected. Let our input be
the following markdown file:

## Header

`:[range]Fnl {expr}`{#:Fnl}
: Evaluates {expr} or range

`vim.b`{#vim.b}
: Buffer-scoped (`:h b:`) variables for the current buffer. Invalid or unset
key returns `nil`. Can be indexed with an integer to access variables for a
specific buffer.

[Span]{#span}
: generic inline container for phrasing content, which does not inherently
represent anything.

Convert it to vimdoc:

------------------------------------------------------------------------
Header *header*

:[range]Fnl {expr} *:Fnl*
Evaluates {expr} or range
`vim.b` *vim.b*
Buffer-scoped (|b:|) variables for the current buffer. Invalid or
unset key returns `nil`. Can be indexed with an integer to access
variables for a specific buffer.
Span *span*
generic inline container for phrasing content, which does not
inherently represent anything.

Convert it to vimdoc with metadata variable set (e.g. with -M vim-
doc-prefix=pandoc)

------------------------------------------------------------------------
Header *pandoc-header*

:[range]Fnl {expr} *:Fnl*
Evaluates {expr} or range
`vim.b` *pandoc-vim.b*
Buffer-scoped (|b:|) variables for the current buffer. Invalid or
unset key returns `nil`. Can be indexed with an integer to access
variables for a specific buffer.
Span *pandoc-span*
generic inline container for phrasing content, which does not
inherently represent anything.

vim.b and Span got their prefixes but not :Fnl because ex-commands
(those starting with :) don't get a prefix, since they are considered
unique across help pages.

In both cases :help b: became reference |b:| (also works with :h b:).
Links pointing to either https://vimhelp.org/ or
https://neovim.io/doc/user become references too.

Vim traditionally wraps at 78, but Pandoc defaults to 72. Use
--columns 78 to match Vim.

SYNTAX HIGHLIGHTING
Pandoc will automatically highlight syntax in fenced code blocks that
are marked with a language name. The Haskell library skylighting is
used for highlighting. Currently highlighting is supported only for
HTML, EPUB, Docx, Ms, Man, Typst, and LaTeX/PDF output. To see a list
of language names that pandoc will recognize, type pandoc --list-high-
light-languages.

The color scheme can be selected using the --syntax-highlighting op-
tion. The default color scheme is pygments, which imitates the default
color scheme used by the Python library pygments (though pygments is
not actually used to do the highlighting). To see a list of highlight
styles, type pandoc --list-highlight-styles.

If you are not satisfied with the predefined styles, you can use
--print-highlight-style to generate a JSON .theme file which can be
modified and used as the argument to --syntax-highlighting. To get a
JSON version of the pygments style, for example:

pandoc -o my.theme --print-highlight-style pygments

Then edit my.theme and use it like this:

pandoc --syntax-highlighting my.theme

If you are not satisfied with the built-in highlighting, or you want to
highlight a language that isn't supported, you can use the --syntax-de-
finition option to load a KDE-style XML syntax definition file. Before
writing your own, have a look at KDE's repository of syntax defini-
tions.

If you receive an error that pandoc "Could not read highlighting
theme", check that the JSON file is encoded with UTF-8 and has no
Byte-Order Mark (BOM).

To disable highlighting, use --syntax-highlighting=none.

CUSTOM STYLES
Custom styles can be used in the docx, odt and ICML formats.

Output
By default, pandoc's odt, docx and ICML output applies a predefined set
of styles for blocks such as paragraphs and block quotes, and uses
largely default formatting (italics, bold) for inlines. This will work
for most purposes, especially alongside a reference doc file. However,
if you need to apply your own styles to blocks, or match a preexisting
set of styles, pandoc allows you to define custom styles for blocks and
text using divs and spans, respectively.

If you define a Div, Span, or Table with the attribute custom-style,
pandoc will apply your specified style to the contained elements (with
the exception of elements whose function depends on a style, like head-
ings, code blocks, block quotes, or links). So, for example, using the
bracketed_spans syntax,

[Get out]{custom-style="Emphatically"}, he said.

would produce a file with "Get out" styled with character style Emphat-
ically. Similarly, using the fenced_divs syntax,

Dickinson starts the poem simply:

::: {custom-style="Poetry"}
| A Bird came down the Walk---
| He did not know I saw---
:::

would style the two contained lines with the Poetry paragraph style.

Styles will be defined in the output file as inheriting from normal
text (docx) or Default Paragraph Style (odt), if the styles are not yet
in your reference doc. If they are already defined, pandoc will not
alter the definition.

This feature allows for greatest customization in conjunction with pan-
doc filters. If you want all paragraphs after block quotes to be in-
dented, you can write a filter to apply the styles necessary. If you
want all italics to be transformed to the Emphasis character style
(perhaps to change their color), you can write a filter which will
transform all italicized inlines to inlines within an Emphasis cus-
tom-style span.

For docx or odt output, you don't need to enable any extensions for
custom styles to work.

Input
The docx reader, by default, only reads those styles that it can con-
vert into pandoc elements, either by direct conversion or interpreting
the derivation of the input document's styles.

By enabling the styles extension in the docx reader (-f docx+styles),
you can produce output that maintains the styles of the input document,
using the custom-style class. A custom-style attribute will be added
for each style. Divs will be created to hold the paragraph styles, and
Spans to hold the character styles. Table styles will be applied di-
rectly to the Table.

For example, using the custom-style-reference.docx file in the test di-
rectory, we have the following different outputs:

Without the +styles extension:

$ pandoc test/docx/custom-style-reference.docx -f docx -t markdown
This is some text.

This is text with an *emphasized* text style. And this is text with a
**strengthened** text style.

> Here is a styled paragraph that inherits from Block Text.

And with the extension:

$ pandoc test/docx/custom-style-reference.docx -f docx+styles -t markdown

::: {custom-style="First Paragraph"}
This is some text.
:::

::: {custom-style="Body Text"}
This is text with an [emphasized]{custom-style="Emphatic"} text style.
And this is text with a [strengthened]{custom-style="Strengthened"}
text style.
:::

::: {custom-style="My Block Style"}
> Here is a styled paragraph that inherits from Block Text.
:::

With these custom styles, you can use your input document as a refer-
ence-doc while creating docx output (see below), and maintain the same
styles in your input and output files.

CUSTOM READERS AND WRITERS
Pandoc can be extended with custom readers and writers written in Lua.
(Pandoc includes a Lua interpreter, so Lua need not be installed sepa-
rately.)

To use a custom reader or writer, simply specify the path to the Lua
script in place of the input or output format. For example:

pandoc -t data/sample.lua
pandoc -f my_custom_markup_language.lua -t latex -s

If the script is not found relative to the working directory, it will
be sought in the custom subdirectory of the user data directory (see
--data-dir).

A custom reader is a Lua script that defines one function, Reader,
which takes a string as input and returns a Pandoc AST. See the Lua
filters documentation for documentation of the functions that are
available for creating pandoc AST elements. For parsing, the lpeg
parsing library is available by default. To see a sample custom
reader:

pandoc --print-default-data-file creole.lua

If you want your custom reader to have access to reader options
(e.g. the tab stop setting), you give your Reader function a second op-
tions parameter.

A custom writer is a Lua script that defines a function that specifies
how to render each element in a Pandoc AST. See the djot-writer.lua
for a full-featured example.

Note that custom writers have no default template. If you want to use
--standalone with a custom writer, you will need to specify a template
manually using --template or add a new default template with the name
default.NAME_OF_CUSTOM_WRITER.lua to the templates subdirectory of your
user data directory (see Templates).

REPRODUCIBLE BUILDS
Some of the document formats pandoc targets (such as EPUB, docx, and
ODT) include build timestamps in the generated document. That means
that the files generated on successive builds will differ, even if the
source does not. To avoid this, set the SOURCE_DATE_EPOCH environment
variable, and the timestamp will be taken from it instead of the cur-
rent time. SOURCE_DATE_EPOCH should contain an integer unix timestamp
(specifying the number of seconds since midnight UTC January 1, 1970).

For reproducible builds with LaTeX, you can either specify the
pdf-trailer-id in the metadata or leave it undefined, in which case
pandoc will create a trailer-id based on a hash of the
SOURCE_DATE_EPOCH and the document's contents.

Some document formats also include a unique identifier. For EPUB, this
can be set explicitly by setting the identifier metadata field (see
EPUB Metadata, above).

ACCESSIBLE PDFS AND PDF ARCHIVING STANDARDS
PDF is a flexible format, and using PDF in certain contexts requires
additional conventions. For example, PDFs are not accessible by de-
fault; they define how characters are placed on a page but do not con-
tain semantic information on the content. However, it is possible to
generate accessible PDFs, which use tagging to add semantic information
to the document.

Pandoc defaults to LaTeX to generate PDF. Tagging support in LaTeX is
in development and not readily available, so PDFs generated in this way
will always be untagged and not accessible. This means that alterna-
tive engines must be used to generate accessible PDFs.

The PDF standards PDF/A and PDF/UA define further restrictions intended
to optimize PDFs for archiving and accessibility. Tagging is commonly
used in combination with these standards to ensure best results.

Note, however, that standard compliance depends on many things, includ-
ing the colorspace of embedded images. Pandoc cannot check this, and
external programs must be used to ensure that generated PDFs are in
compliance.

ConTeXt
ConTeXt always produces tagged PDFs, but the quality depends on the in-
put. The default ConTeXt markup generated by pandoc is optimized for
readability and reuse, not tagging. Enable the tagging format exten-
sion to force markup that is optimized for tagging. For example:

pandoc -t context+tagging doc.md -o doc.pdf

A recent context version should be used, as older versions contained a
bug that lead to invalid PDF metadata.

WeasyPrint
The HTML-based engine WeasyPrint includes experimental support for
PDF/A and PDF/UA since version 57. Tagged PDFs can created with

pandoc --pdf-engine=weasyprint \
--pdf-engine-opt=--pdf-variant=pdf/ua-1 ...

The feature is experimental and standard compliance should not be as-
sumed.

Prince XML
The non-free HTML-to-PDF converter prince has extensive support for
various PDF standards as well as tagging. E.g.:

pandoc --pdf-engine=prince \
--pdf-engine-opt=--tagged-pdf ...

See the prince documentation for more info.

Typst
Typst 0.12 can produce PDF/A-2b:

pandoc --pdf-engine=typst --pdf-engine-opt=--pdf-standard=a-2b ...

Word Processors
Word processors like LibreOffice and MS Word can also be used to gener-
ate standardized and tagged PDF output. Pandoc does not support direct
conversions via these tools. However, pandoc can convert a document to
a docx or odt file, which can then be opened and converted to PDF with
the respective word processor. See the documentation for Word and Li-
breOffice.

RUNNING PANDOC AS A WEB SERVER
If you rename (or symlink) the pandoc executable to pandoc-server, or
if you call pandoc with server as the first argument, it will start up
a web server with a JSON API. This server exposes most of the conver-
sion functionality of pandoc. For full documentation, see the pan-
doc-server man page.

If you rename (or symlink) the pandoc executable to pandoc-server.cgi,
it will function as a CGI program exposing the same API as pan-
doc-server.

pandoc-server is designed to be maximally secure; it uses Haskell's
type system to provide strong guarantees that no I/O will be performed
on the server during pandoc conversions.

RUNNING PANDOC AS A LUA INTERPRETER
Calling the pandoc executable under the name pandoc-lua or with lua as
the first argument will make it function as a standalone Lua inter-
preter. The behavior is mostly identical to that of the standalone lua
executable, version 5.4. All pandoc.* packages, as well as the pack-
ages re and lpeg, are available via global variables. Furthermore, the
globals PANDOC_VERSION, PANDOC_STATE, and PANDOC_API_VERSION are set at
startup. For full documentation, see the pandoc-lua man page.

A NOTE ON SECURITY
1. Although pandoc itself will not create or modify any files other
than those you explicitly ask it create (with the exception of tem-
porary files used in producing PDFs), a filter or custom writer
could in principle do anything on your file system. Please audit
filters and custom writers very carefully before using them.

2. Several input formats (including LaTeX, Org, RST, and Typst) support
include directives that allow the contents of a file to be included
in the output. An untrusted attacker could use these to view the
contents of files on the file system. (Using the --sandbox option
can protect against this threat.)

3. Several output formats (including RTF, FB2, HTML with --self-con-
tained, EPUB, Docx, and ODT) will embed encoded or raw images into
the output file. An untrusted attacker could exploit this to view
the contents of non-image files on the file system. (Using the
--sandbox option can protect against this threat, but will also pre-
vent including images in these formats.)

4. In reading HTML files, pandoc will attempt to include the contents
of iframe elements by fetching content from the local file or URL
specified by src. If untrusted HTML is processed on a server, this
has the potential to reveal anything readable by the process running
the server. Using the -f html+raw_html will mitigate this threat by
causing the whole iframe to be parsed as a raw HTML block. Using
`-sandbox will also protect against the threat.

5. If your application uses pandoc as a Haskell library (rather than
shelling out to the executable), it is possible to use it in a mode
that fully isolates pandoc from your file system, by running the
pandoc operations in the PandocPure monad. See the document Using
the pandoc API for more details. (This corresponds to the use of
the --sandbox option on the command line.)

6. Pandoc's parsers can exhibit pathological performance on some corner
cases. It is wise to put any pandoc operations under a timeout, to
avoid DOS attacks that exploit these issues. If you are using the
pandoc executable, you can add the command line options +RTS -M512M
-RTS (for example) to limit the heap size to 512MB. Note that the
commonmark parser (including commonmark_x and gfm) is much less vul-
nerable to pathological performance than the markdown parser, so it
is a better choice when processing untrusted input.

7. The HTML generated by pandoc is not guaranteed to be safe. If
raw_html is enabled for the Markdown input, users can inject arbi-
trary HTML. Even if raw_html is disabled, users can include danger-
ous content in URLs and attributes. To be safe, you should run all
HTML generated from untrusted user input through an HTML sanitizer.

AUTHORS
Copyright 2006-2024 John MacFarlane (jgm@berkeley.edu). Released under
the GPL, version 2 or greater. This software carries no warranty of
any kind. (See COPYRIGHT for full copyright and warranty notices.)
For a full list of contributors, see the file AUTHORS.md in the pandoc
source code.

The Pandoc source code may be downloaded from <https://hack-
age.haskell.org/package/pandoc> or <https://github.com/jgm/pandoc/re-
leases>. Further documentation is available at <https://pandoc.org>.

pandoc 3.8.1 2025-09-29 pandoc(1)

Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=pandoc&sektion=1&manpath=FreeBSD+Ports+15.0>

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