A person who wrote (at least part of) the document.
keywords
A comma and/or space separated list of the
keywords or keyphrases of the document.
copyright
The name (or names) of the copyright holder(s)
for this document, and/or a complete statement of copyright.
date
The last updated date of the document, in ISO8601 date format.
identifier
The normative URI for the document.
rel
script
A reference to a client-side script. When used with the
LINK element, the script is evaluated as the document loads and
may modify the contents of the document dynamically.