%rec: frontmatter
%doc: minimal acceptable document metadata
%mandatory: title type description
%allowed: title type description
%type: title,description line
%type: type enum string datetime list
%key: title

title: title
type: string
description: the title of the document

title: description
type: string
description: a summary, description, or tagline of the document

title: author
type: string
description: the author of the document

title: version
type: string
description: document version

title: created
type: datetime
description: when did work begin on the document

title: published
type: datetime
description: when was the document originally published

title: updated
type: datetime
description: when was the document last updated

title: flags
type: list
description: document status e.g. hidden, draft, unlisted

title: tags
type: list
description: keywoards, categories, and tags