text/markdown effort in IETF (invite)

[John MacFarlane]

+++ Aristotle Pagaltzis [Jul 10 14 14:18 ]:
>• No implementor is going to write a Markdown processor that is actually
>  capable of dealing with this MIME type. (Except of course the author
>  of floobity 1.2.3 itself, in this example, of course – which is not
>  for any attempt at making it work in a generic way.)

Pandoc can already do this. Quick demo:

pandoc -s -f markdown_strict+pandoc_title_block+tex_math_dollars -t markdown_strict+mmd_title_block+tex_math_double_backslash


% Demo
% John
% July 1, 2014

Here is some math:  $e=mc^2$.

^D
author: John
date: July 1, 2014
title: Demo

Here is some math: \\(e=mc^2\\).


Here's my current list of extensions/variations (from the pandoc
source code).  Of course, it's nowhere near exhaustive:

      Ext_footnotes           -- ^ Pandoc/PHP/MMD style footnotes
    | Ext_inline_notes        -- ^ Pandoc-style inline notes
    | Ext_pandoc_title_block  -- ^ Pandoc title block
    | Ext_yaml_metadata_block -- ^ YAML metadata block
    | Ext_mmd_title_block     -- ^ Multimarkdown metadata block
    | Ext_table_captions      -- ^ Pandoc-style table captions
    | Ext_implicit_figures    -- ^ A paragraph with just an image is a figure
    | Ext_simple_tables       -- ^ Pandoc-style simple tables
    | Ext_multiline_tables    -- ^ Pandoc-style multiline tables
    | Ext_grid_tables         -- ^ Grid tables (pandoc, reST)
    | Ext_pipe_tables         -- ^ Pipe tables (as in PHP markdown extra)
    | Ext_citations           -- ^ Pandoc/citeproc citations
    | Ext_raw_tex             -- ^ Allow raw TeX (other than math)
    | Ext_raw_html            -- ^ Allow raw HTML
    | Ext_tex_math_dollars    -- ^ TeX math between $..$ or $$..$$
    | Ext_tex_math_single_backslash  -- ^ TeX math btw \(..\) \[..\]
    | Ext_tex_math_double_backslash  -- ^ TeX math btw \\(..\\) \\[..\\]
    | Ext_latex_macros        -- ^ Parse LaTeX macro definitions (for math only)
    | Ext_fenced_code_blocks  -- ^ Parse fenced code blocks
    | Ext_fenced_code_attributes  -- ^ Allow attributes on fenced code blocks
    | Ext_backtick_code_blocks    -- ^ Github style ``` code blocks
    | Ext_inline_code_attributes  -- ^ Allow attributes on inline code
    | Ext_markdown_in_html_blocks -- ^ Interpret as markdown inside HTML blocks
    | Ext_markdown_attribute      -- ^ Interpret text inside HTML as markdown
                                  --   iff container has attribute 'markdown'
    | Ext_escaped_line_breaks     -- ^ Treat a backslash at EOL as linebreak
    | Ext_link_attributes     -- ^ MMD style reference link attributes
    | Ext_autolink_bare_uris  -- ^ Make all absolute URIs into links
    | Ext_fancy_lists         -- ^ Enable fancy list numbers and delimiters
    | Ext_lists_without_preceding_blankline -- ^ Allow lists without preceding blank
    | Ext_startnum            -- ^ Make start number of ordered list significant
    | Ext_definition_lists    -- ^ Definition lists as in pandoc, mmd, php
    | Ext_example_lists       -- ^ Markdown-style numbered examples
    | Ext_all_symbols_escapable  -- ^ Make all non-alphanumerics escapable
    | Ext_intraword_underscores  -- ^ Treat underscore inside word as literal
    | Ext_blank_before_blockquote -- ^ Require blank line before a blockquote
    | Ext_blank_before_header     -- ^ Require blank line before a header
    | Ext_strikeout           -- ^ Strikeout using ~~this~~ syntax
    | Ext_superscript         -- ^ Superscript using ^this^ syntax
    | Ext_subscript           -- ^ Subscript using ~this~ syntax
    | Ext_hard_line_breaks    -- ^ All newlines become hard line breaks
    | Ext_ignore_line_breaks  -- ^ Newlines in paragraphs are ignored
    | Ext_literate_haskell    -- ^ Enable literate Haskell conventions
    | Ext_abbreviations       -- ^ PHP markdown extra abbreviation definitions
    | Ext_auto_identifiers    -- ^ Automatic identifiers for headers
    | Ext_ascii_identifiers   -- ^ ascii-only identifiers for headers
    | Ext_header_attributes   -- ^ Explicit header attributes {#id .class k=v}
    | Ext_mmd_header_identifiers -- ^ Multimarkdown style header identifiers [myid]
    | Ext_implicit_header_references -- ^ Implicit reference links for headers
    | Ext_line_blocks         -- ^ RST style line blocks