# Markdown Flavors
This is a brief document that describes the various flavors of Markdown compared to [John Gruber’s original design document](https://daringfireball.net/projects/markdown/syntax). Specifically call-outs will be made for the following:
1. [CommonMark](https://spec.commonmark.org/0.29/) (CM)
1. [GitHub Flavored Markdown](https://github.github.com/gfm/) (GFM)
1. [MultiMarkdown](https://fletcherpenney.net/multimarkdown/) (MMD)
1. [Markdown Extra (PHP)](https://michelf.ca/projects/php-markdown/extra/) (Extra)
1. [Pandoc](https://pandoc.org/MANUAL.html) (Pandoc)
1. [Kramdown](https://kramdown.gettalong.org/syntax.html) (Kramdown)
## Markdown Core
### Inline HTML
### Block Elements
#### Paragraphs & Line Breaks
#### Headers
> Adding IDs
#### BlockQuotes
#### Lists
#### Code Blocks
#### Horizontal Rules
### Span Elements
#### Links
#### Emphasis
#### Code
> Fenced code ``` or ~~~
#### Images
### Miscellaneous
#### Backslash Escapes
#### Automatic Links
## Full Extensions
## Comparison
| **HTML** | Inline HTML | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** |
| | Fenced/Native div | No | No | No | No | No | **Yes** | No |
| | "[]" Anchors | No | No | No | **Yes** | No | No | No |
| | "{}" Special AL | No | No | No | No | **Yes** | **Yes** | No |
| | "{:}" Inline AL | No | No | No | No | No | No | **Yes** |
| **Block** | Paragraphs | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** |
| | Line Breaks | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** |
| | "\" Line Breaks | No | No | No | **Yes** | No | No | No |
| | Headers - Setext | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** |
| | Headers - atx | **Yes** | Yes | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** |
| | Headers - atx closed | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** |
| | Block Quotes | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** |
| | Unordered Lists | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** |
| | Ordered Lists | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** |
| | Task List Items | No | No | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** |
| | Indented Defn. Lists | No | No | No | **Yes** | **Yes** | **Yes** | **Yes** |
| | Verbatim (Indent Code) | No | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** |
| | Fenced Code | No | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** |
| | Horizontal Rule | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** |
| | Pipe Tables | No | No | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** |
| | Table Captions | No | No | No | **Yes** | No | **Yes** | No |
| | Figure Image | No | No | No | **Yes** | No | **Yes** | No |
| | Image (Block) Captions | No | No | No | **Yes** | No | **Yes** | No |
| | Table of Contents | No | No | No | **Yes** | No | No | No |
| **Span** | Emphasis (Italic) | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** |
| | Strong (bold) | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** |
| | Strikethrough | No | No | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** |
| | Superscript Text | No | No | No | **Yes** | No | **Yes** | No |
| | Subscript Text | No | No | No | **Yes** | No | **Yes** | No |
| | Code | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** |
| | Code w/escaped "`" | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** |
| | [CriticMarkup] | No | No | No | **Yes** | No | No | No |
| | "--" en dash | No | No | No | **Yes** | No | No | **Yes** |
| | "---" em dash | No | No | No | **Yes** | No | No | **Yes** |
| | "..." ellipsis | No | No | No | **Yes** | No | No | **Yes** |
| | "<<>>" guillement | No | No | No | No | No | No | **Yes** |
| | Emoji | No | No | ??? | No | No | **Yes** | No |
| | Dollar Math | No | No | No | **Yes** | No | **Yes** | **Yes** |
| | Backslash Math | No | No | No | **Yes** | No | No | No |
| | Images | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** |
| | Image Height/Width | No | No | No | **Yes** | No | No | No |
| | Automatic Links | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** |
| | Backslash Escapes | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** |
| | Links | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** |
| | Link Titles | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** |
| | Ref-Style Links | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** | **Yes** |
| | Footnotes | No | No | No | **Yes** | **Yes** | **Yes** | **Yes** |
| | Abbreviations | No | No | No | **Yes** | **Yes** | No | **Yes** |
| | Glossary | No | No | No | **Yes** | No | No | No |
| | Citations | No | No | No | **Yes** | No | **Yes** | No |
| **Other** | Metadata | No | No | **Yes** | **Yes** | No | **Yes** | No |
| | Transclusion | No | No | No | **Yes** | No | No | No |
| | Variables | No | No | No | **Yes** | No | No | No |
| | Seq. numbered examples | No | No | No | No | No | **Yes** | No |
[CriticMarkup]: http://criticmarkup.com