Re: agenda: RDF Data Access WG 19Oct

On Mon, Oct 18, 2004 at 10:12:44AM -0500, Dan Connolly wrote:
> ACTION EricP: draft UC on overlap between RDF query and web service
> constraints with respect to WS-Policy continues.

Nothing custom, but the last section of "RDF For Web Service Policy
Assertions" [1] starts on it a bit. The problem is that the web
services folks haven't worked out their desired
expressivity. Proposals range from simple identification (logical
operations are wrapped into a new identifier, ala FredzAuthentication
^ JoezReliableMessaging turns into MyAuthReliableMsg) to all of
conjunction, disjunction, negation.

ws-policy [2], a leading contender, recently struck negation and now
offers conjunction and disjunction. ws-policy policies are compared
for equivilence or subsumption by examining the disjunctive normal
form of the policy expression. ala comparing
  policy1:
    FredzAuthentication ^ (JoezReliableMessaging v SuezTransactions)
  policy2:
    FredzAuthentication ^ SuezTransactions


[1] http://www.w3.org/2004/08/20-ws-pol-pos/#query
[2] http://www-106.ibm.com/developerworks/library/specification/ws-polfram/
-- 
-eric

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