me of these conformance
        requirements are phrased as conformance requirements on publishers;
        such requirements are implicitly requirements on documents: by
        definition, all documents are assumed to have a publisher.
      </p>

      <p>
        Conforming documents must not include deprecated or obsolete syntax
        from Activity Streams 1.0. Conforming documents must include properties
        and types from the Activity Vocabulary. Conforming documents that use
        other voca