Namespaces
- ar: addressable resources
- desc: you go to the URL, and get "the thing" back
- thought: should've called it "locatable resource"
- features: hierarchically consistent
- book: since ARs can be books, this probably needs reworking. Also, since some ARs are subclassed by website, website/author,
- community: not exactly an organization; could be used for factions, alliances, etc; differs from group in that a community is a social unit with some common values; a group is just an enumeration with common characteristics
- hierarchically consistent
- course: educational unit of teaching
- email:
- event: