Multiple inheritance

Hi folks!

Let's say I want to use both the http://rdf.data-vocabulary.org/ vocabulary
such that google will recognize my markup (
http://www.google.com/support/webmasters/bin/answer.py?hl=en&answer=146646)
and foaf.

I.e. foaf has more attributes, but I want google to recognize my markup as
well.

My N3 is a bit rusty, but couldn't you do like:

<#me> a foaf:Person, v:Person;
    foaf:name "Erling";
..

How do you express this in rdfa?

<div xmlns:v="http://rdf.data-vocabulary.org/"
xmlns:foaf="http://xmlns.com/foaf/0.1/" typeof="v:Person,foaf:Person">
   <span property="v:name">Erling</span>
</div>

?

Thanks,
Erling