[FIG(quote)[
[FIGCAPTION[
[1] [CITE@en[commonmark/CommonMark: CommonMark spec, with reference implementations in C and JavaScript]]
([TIME[2018-09-25 04:00:16 +09:00]])
<https://github.com/commonmark/CommonMark#the-spec>
]FIGCAPTION]

> The source of the spec is spec.txt. This is basically a Markdown file, with code examples written in a shorthand form

]FIG]