Issue 4: Test Subjects
  - earl:testSubject - How would it work if this were more than one page
    e.g. an evaluation on an entire site? 
    possible
    solutions 
      - match against a RegExp,
- use some of the log stuff,
- have multiple objects,
- use URISpace,
- come up with some URISpace-in-RDF-a-like
- use rdf:Bag, if you have a way to define "site"