NAME
    Pandoc::Elements - create and process Pandoc documents

SYNOPSIS
    The output of this script "hello.pl"

        use Pandoc::Elements;
        use JSON;

        print Document({ 
                title => MetaInlines [ Str "Greeting" ] 
            }, [
                Header( 1, attributes { id => 'top' }, [ Str 'Hello' ] ),
                Para [ Str 'Hello, world!' ],
            ])->to_json;

    can be converted for instance to HTML with via

        ./hello.pl | pandoc -f json -t html5 --standalone

    an equivalent Pandoc Markdown document would be

        % Greeting
        # Gruß {.de}
        Hello, world!

    See module Pandoc::Filter and Pandoc::Walker for processing the abstract
    syntax tree of pandoc documents in Perl.

DESCRIPTION
    Pandoc::Elements provides utility functions to create abstract syntax
    trees (AST) of Pandoc <http://johnmacfarlane.net/pandoc/> documents. The
    resulting data structure can be converted by Pandoc to many other
    document formats, such as HTML, LaTeX, ODT, and ePUB.

  FUNCTIONS
    In addition to constructor functions for each document element, the
    following functions are exported.

   attributes { key => $value, ... }
    Maps a hash reference into an attributes list with id, classes, and
    ordered key-value pairs.

   element( $name => $content )
    Create a Pandoc document element. This function is only exported on
    request.

ELEMENTS
    AST elements are encoded as Perl data structures equivalent to the JSON
    structure, emitted with pandoc output format "json". All elements are
    blessed objects that provide the following element methods and
    additional accessor methods specific to each element.

  ELEMENT METHODS
   json
    Return the element as JSON encoded string. The following are equivalent:

        $element->to_json;
        JSON->new->utf8->convert_blessed->encode($element);

   name
    Return the name of the element, e.g. "Para" for a paragraph element.

   content
    Return the element content. For most elements (Para, Emph, Str...) the
    content is an array reference with child elements. Other elements
    consist of multiple parts; for instance the Link element has a link text
    ("content") and a link target ("target") with "url" and "title".

   is_block
    True if the element is a Block element

   is_inline
    True if the element is an inline Inline element

   is_meta
    True if the element is a Metadata element

   is_document
    True if the element is a Document element

  BLOCK ELEMENTS
   BlockQuote
    Block quote, consisting of a list of blocks ("content")

   BulletList
    ...

   CodeBlock
    ...

   DefinitionList
    ...

   Div
    Generic container of blocks ("content") with attributes ("attrs")

   Header
    ...

   HorizontalRule
    Horizontal rule

   Null
    Nothing

   OrderedList
    Definition list of "items"/"content", each a pair consisting of a term
    (a list of inlines) and one or more definitions (each a list of blocks)

   Para
    Paragraph, consisting of a list of Inline elements ("content").

   Plain
    Plain text, not a paragraph, consisting of a list of Inline elements
    ("content").

   RawBlock
    Raw block with "format" and "content" string.

   Table
    Table, with "caption", column "alignments", relative column "widths" (0
    = default), column "headers" (each a list of blocks), and "rows" (each a
    list of lists of blocks).

  INLINE ELEMENTS
   Cite
   Code
   Emph
   Image
   LineBreak
   Link
   Math
   Note
   Quoted
   RawInline
   SmallCaps
   Space
   Span
   Str
   Strikeout
   Strong
   Subscript
   Superscript
  METADATA ELEMENTS
   MetaBlocks
   MetaBool
   MetaInlines
   MetaList
   MetaMap
   MetaString
  DOCUMENT ELEMENT
   Document
    Root element, consisting of metadata hash ("meta") and document element
    array ("content").

  TYPES
    The following elements are used as types only:

    "DefaultDelim", "Period", "OneParen", "TwoParens", "SingleQuote",
    "DoubleQuote", "DisplayMath", "InlineMath", "AuthorInText",
    "SuppressAuthor", "NormalCitation", "AlignLeft", "AlignRight",
    "AlignCenter", "AlignDefault", "DefaultStyle", "Example", "Decimal",
    "LowerRoman", "UpperRoman", "LowerAlpha", "UpperAlpha"

SEE ALSO
    Pandoc implements a wrapper around the pandoc executable.

    Text.Pandoc.Definition
    <https://hackage.haskell.org/package/pandoc-types/docs/Text-Pandoc-Defin
    ition.html> contains the original definition of Pandoc document data
    structure in Haskell. This module version was last aligned with
    pandoc-types-1.12.4.1.

AUTHOR
    Jakob Voß <jakob.voss@gbv.de>

COPYRIGHT AND LICENSE
    Copyright 2014- Jakob Voß

    GNU General Public License, Version 2

    This module is heavily based on Pandoc by John MacFarlane.