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 followed 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, endif, 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 values. 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 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 optionally contain an else (enclosed in matched delimiters). The if section is used if variable has a non-empty value, otherwise the else section is used (if present). 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 evaluated 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 keyword 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 explicit for loop) cannot contain interpolated variables or other template 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 ^ directive 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 automatically.

Breakable spaces

Normally, spaces in the template itself (as opposed to values of the interpolated variables) are not breakable, but they can be made breakable 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 specified 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 letters, chain with uppercase.

• roman: Converts textual values that can be read as an integer into lowercase roman numerials. This can be used to get lettered enumeration from array indices. To get uppercase roman, chain with uppercase.

• left n "leftborder" "rightborder": Renders a textual value in a block of width n, aligned to the left, with an optional left and right border. Has no effect on other values. This can be used to align material 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.

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 default.

subtitle

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

abstract

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

abstract-title

title of abstract, currently used only in HTML and EPUB. This will be set automatically to a localized value, depending 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 properties 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 output 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 écrite en français 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 generating 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=templates/styles.html). Unless you use --css, this variable is set to true by default. You can disable it with e.g. pandoc -M document-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.

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 element.

To override or extend some CSS for just one document, include for example:

---
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 authors

revealjs-url

base URL for reveal.js documents (defaults to https://unpkg.com/reveal.js@^4/)

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 and beamer] for an example.

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 authors

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

options for LaTeX beamer themes (a list).

titlegraphic

image for title slide

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.

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 Headers and Footers); repeat up to four times for different placement

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); repeat for multiple options

layout

options for page margins and text arrangement (see ConTeXt Layout); 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, boldslanted, 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)

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); repeat 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 --variable=pdfa without specified value is not supported. To successfully generate PDF/A the required ICC color profiles have to be available and the content and all included files (such as images) have to be standard conforming. The ICC profiles and output 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 multiple 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/--table-of-contents)

whitespace

spacing between paragraphs, e.g. none, small (using setupwhitespace)

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

hyphenate

if true (the default), hyphenation will be used

section

section number in man pages

Variables for ms

fontfamily

font family (e.g. T or P)

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, revealjs, 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 multiple 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 following 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 terminal.

If you need absolute paths, use e.g. $curdir$/$sourcefile$.

curdir

working directory from which pandoc is run.

toc

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

toc-title

title of table of contents (works only with EPUB, HTML, revealjs, opendocument, odt, docx, pptx, beamer, LaTeX)

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, rst

enabled by default in

markdown, latex, context (both input and output)

Note: If you are writing Markdown, then the smart extension has the reverse 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.

Extension: auto_identifiers

A heading without an explicitly specified identifier will be automatically 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,

These rules should, in most cases, allow one to determine the identifier 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 appended; the third with -2; and so on.

(However, a different algorithm is used if gfm_auto_identifiers is enabled; see below.)

These identifiers are used to provide link targets in the table of contents generated by the --toc|--table-of-contents option. They also make it easy to provide links from one section of a document to another. 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 identifier will be attached to the enclosing <section> (or <div>) tag rather than the heading itself. This allows entire sections to be manipulated 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 letters 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.

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 headings 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 indented 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 inside 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.

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

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 substituted 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_number 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 substituted with cross-references that will use the number of the referenced item. The original link text is discarded. This extension can be combined 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, read all docx styles as divs (for paragraph styles) and spans (for character styles) regardless of whether pandoc understands the meaning of these styles. This can be used with docx custom styles. Disabled by default.

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 being parsed. Use this only when you are targeting ipynb or a markdown-based output format.

Extension: citations

When the citations extension is enabled in org, org-cite and org-ref style citations will be parsed as native pandoc citations.

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

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 alphabetical 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 tables allow more fine-grained global customization but come at a performance penalty compared to extreme tables.

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.

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*

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

Heading identifiers

See also the auto_identifiers extension above.

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

# My heading {#foo}

## My heading ##    {#foo}

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

# My heading {-}

# My heading {.unnumbered}

# Heading identifiers in HTML

[Heading identifiers in HTML]

[Heading identifiers in HTML][]

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

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

# Foo

[foo]: bar

See [foo]

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.
>> Nested.

Indented code blocks

A block of text indented four spaces (or one tab) is treated as verbatim text: that is, special characters do not trigger special formatting, 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

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

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

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

<pre id="mycode" class="haskell numberLines" startFrom="100">
  <code>
  ...
  </code>
</pre>

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

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

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 formatted as Markdown. This is useful for verse and addresses:

| The limerick packs laughs anatomical
| In space that is quite economical.
|    But the good ones I've seen
|    So seldom are clean
| And the clean ones so seldom are comical

| 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, but not block-level formatting (such as block quotes or lists).

This syntax is borrowed from reStructuredText.

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 indented 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 content. 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 paragraphs 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,” instead 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 begin with enumerators rather than bullets.

In original Markdown, enumerators are decimal numbers followed by a period 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

#. one
#. two

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

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

#.  one
#.  two
#.  three

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

Definition lists

Term 1

:   Definition 1

Term 2 with *inline markup*

:   Definition 2

        { some code, part of Definition 2 }

    Third paragraph of definition 2.

Term 1

:   Definition
with lazy continuation.

    Second paragraph of the definition.

Term 1
  ~ Definition 1

Term 2
  ~ Definition 2a
  ~ Definition 2b

Numbered example lists

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

Explanation of examples.

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

(@good)  This is a good example.

As (@good) illustrates, ...

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

<!-- end of list -->

    { 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

Extension: table_captions

A caption may optionally be provided with all 4 kinds of tables (as illustrated in the examples below). A caption is a paragraph beginning with the string 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:³

• 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, respectively.

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.

+---------------+---------------+--------------------+
| Fruit         | Price         | Advantages         |
+===============+===============+====================+
| Bananas       | $1.34         | - built-in wrapper |
|               |               | - bright color     |
+---------------+---------------+--------------------+
| Oranges       | $2.10         | - cures scurvy     |
|               |               | - tasty            |
+---------------+---------------+--------------------+

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 that span multiple columns or rows are not supported. Grid tables can be created easily using Emacs’ table-mode (M-x table-insert).

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           |
+---------------+---------------+--------------------+

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 vertically aligned, as they are in the above example. So, this is a perfectly 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.

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 title 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 (italics, 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, titles 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 specified with -T and no title block appears in the document, the title prefix 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. 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 several 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 document. 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 beginning 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 backslash 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 indented block that will be interpreted literally, without need for escaping. 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 expects a simple list or string, but can be changed to support more complicated 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 extension), 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 arguments 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.

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.

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\*.

feas*ible*, not feas*able*.

Strikeout

This ~~is deleted text.~~

Superscripts and subscripts

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

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 backticks will be ignored.)

The general rule is that a verbatim span starts with a string of consecutive 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: `\*`.

`<$>`{.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.

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 enclose 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 depends 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 format (-t asciidoc) it will appear verbatim surrounded by latexmath:[$...$] (for inline math) or [latexmath]++++\[...\]+++ (for display math). For AsciiDoctor output format (-t asciidoctor) the LaTex delimiters ($..$ and \[..\]) are omitted.

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

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.

Extension: raw_html

Markdown allows you to insert raw HTML (or DocBook) anywhere in a document (except verbatim contexts, where <, >, and & are interpreted literally). (Technically this is not an extension, since standard Markdown 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 output, 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, subscripts, 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 example), * 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 Markdown. Thus, for example, pandoc will turn

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

into

<table>
<tr>
<td><em>one</em></td>
<td><a href="https://google.com">a link</a></td>
</tr>
</table>

whereas Markdown.pl will preserve it as is.

There is one exception to this rule: text between <script>, <style>, 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

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

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

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

Extension: latex_macros

When this extension is enabled, pandoc will parse LaTeX macro definitions 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 targeting 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.

Automatic links

If you enclose a URL or email address in pointy brackets, it will become 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 consists 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 citation (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 restriction. So the following is fine in pandoc, though not in most other implementations:

> My block [quote].
>
> [quote]: /foo

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).

or

See the [Introduction].

[Introduction]: #introduction

Internal links are currently supported for HTML formats (including HTML slide shows and EPUB), LaTeX, and ConTeXt.

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.

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 nonbreaking 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 attributes 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 example:

![](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 converted 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 information).
• The % unit is generally relative to some available space. For example the above example will render to the following.
  • HTML: <img href="file.jpg" style="width: 50%;" />
  • LaTeX: \includegraphics[width=0.5\textwidth,height=\textheight]{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 image file.

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 attributes. The attributes may optionally be followed by another string of consecutive colons. The attribute syntax is exactly as in fenced code blocks (see Extension: 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"}

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, or newlines. 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.^[Inlines 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.

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 start 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 included in the key. In @{Foo_bar.baz.}, the key is Foo_bar.baz., including 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://example.com/bib?name=foobar&date=2000}, p. 33].

Citation items may optionally include a prefix, a locator, and a suffix. 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 bibliographical 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.

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, relative 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 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 chapter. You would like to have ![image](spider.jpg) in chap1/text.md refer 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/spider.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 rewritten relative to the file containing the link reference definition, not the file containing the reference link or image itself, if these differ.

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_attributes.)
• 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 heading (separated by whitespace from the text) affect the heading element. (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 affect links that refer to that definition.

Note that pandoc’s AST does not currently allow attributes to be attached 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: - before 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 flavored 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 ignore_line_breaks for texts that include a mix of East Asian wide characters and other characters.

Extension: emoji

Parses textual emojis like :smile: as Unicode emoticons.

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 Markdown. This extension changes the behavior so that Markdown is only parsed inside block-level tags if the tags have the attribute markdown=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_title_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: 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 references. This extension should not be confused with the link_attributes 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, after the heading but before any trailing #s in an ATX heading).

Extension: compact_definition_lists

Activates the definition list syntax of pandoc 1.12.x and earlier. This syntax differs from the one described above under Definition lists in several respects:

• No blank line is required between consecutive items of the definition list.
• To get a “tight” or “compact” list, omit space between consecutive items; the space between a term and its definition does not affect anything.
• Lazy wrapping of paragraphs is not allowed: the entire definition must be indented four spaces.⁴

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 elements that accept attributes, a data-pos attribute is added; other elements 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 sequence that follows. For example:

x^2 = 4

or

Oxygen is O~2.

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, USenglish, 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 converts 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 conversion to title case in styles that call for this. (Conversion happens 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 manuscript).

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.

PowerPoint layout choice

When creating slides, the pptx writer chooses from a number of pre-defined 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 containing 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 content, 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 criteria 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.

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.

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.

For pptx, you can use a reference doc in which background images have been set on the relevant layouts.

On individual slides (reveal.js, pptx)

To set an image for a particular reveal.js or pptx slide, add {background-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 background-size, background-repeat, background-color, transition, and transition-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 automatically.)

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.