Various Markdown Standards

Daring Fireball / John Gruber Markdown 1.0.1

• https://daringfireball.net/projects/markdown/

GitHub Flavored Markdown

• https://github.github.com/gfm/
• they have well-defined wiki links: https://github.github.com/gfm/#links

Details (Perhaps Obscure)

• Setext vs atx Header Styles in Markdown | Brianary