History
  - The section on Namespaces in Web Architecture from
    50,000 feet states:
    
      - "The namespace document (with the namespace URI) is a place for the
        language publisher to keep definitive material about a namespace.
        Schema languages are ideal for this.
 
    
   
  - Tim Bray disagreed with the assertion about using Schema languages for
    namespace documents and the TAG agreed to open Issue
    namespaceDocument-8 on this matter.