rel-author
Scope
rel="author" is created for "tagging" persons, typically give them credit for their work (or portions of it, like books, articles, blog posts etc).
Implementations
This section is informative.
An interesting rel="author" implementation set of examples is brought up by Google through a series of Videos posted on Youtube:
- 1st video Authorship markup and the respective implementation procedure.
- The 2nd video Authorship markup using URL parameters and the new implementation procedure with the help of Google Profile (and hopefully, this type of implementation can be used on any other personal BIO page of respective author).