use cases: log:semantics, log:includes, log:notIncludes

From: Sandro Hawke (
Date: 03/11/03

  • Next message: Wagner, G.R.: "RE: what is a rule?"
    here's a draft.   it's kind of weak on actual use-case, but maybe it's
    enough of a start.   
        -- sandro
    2.x Rules About Web Content
    Documents available on the web can be important inputs into custom
    reasoning involving rules.  Certain conclusions can be drawn when
    the document retreived from some URI says certain things, does _not_
    say certain things, is signed by a certain signature, was last
    modified at a certain date, etc.  For example:
       * gives the official list of W3C publications
         and their normative status.  A form of this in RDF could be
         useful input to rules about whether a given document was
         normative.  This involves negatation-as-failure in an explicitely
         closed world: anything not listed on that page cannot be a W3C
       * One document may logically include (assert) another, subject to
         authenticity verification (either static, using a secure hash
         function, or dynamic, using a signature function).  This may
         involve complex policy rules including expiration of keys and
         content being available in multiple locations on the web.  For
         instance, content may be published with links to plug-in
         implementation code which can be automatically downloaded if
         signatures provide sufficiently security for all of: the user,
         the user's systems administrators, and the content provider who
         is concerned about liability triggering download of an unsigned
       * Dynamically generating documents, involving querying multiple
         web-available knowledge bases, applying defaults when information
         is absent, and applying aggregation functions to generate a
         coherent whole.

    This archive was generated by hypermail 2.1.4 : 03/11/03 EST