What is it?
  - An RDF-based language.
- Used to produce evaluation reports.
- Evaluate tools or Web content for conformance to a spec 
 (although flexible enough to make claims about other things)
 
- Allows us to save information about results from human tests as well as
    tools.
- Allows us to compare those results to determine conformance.
- Developed by the ERT WG (Evaluation and Repair
    Tools WG)