[oslc-core] Addition of Resource defintions for oslc:Discussion and oslc:Comment

[Steve K Speicher]

Per my action, I have updated 
http://open-services.net/bin/view/Main/OSLCCoreSpecAppendixADRAFT#Common_Resource_definitions 
to now include Discussion and Comment resource definitions, eliminating 
them from CM 2.0 spec.  I have also added a common property 
oslc:discussion.

One topic for discussion is comment creation.  I see some possible ways to 
create Comments and associate them to a Discussion:
1) Expose a Comment creation factory from oslc:Service
2) Utilize either the Discussion resource URI or
3) expose a property on the Discussion resource say 'commentFactoryURI' ?

I think with option 1), it would be fairly inefficient to have to find the 
factory URI for each resource via service discovery.  Though there is no 
reason to prohibit this

I believe options 2) and 3) have desirable characteristics.  Is there any 
issue of overloading the Discussion resource URI to be a creation factory 
for Comment resources?
For the moment, the spec says 2).

Perhaps there is a 4th option, treat Comments as 'Local Inlined Resources' 
and add/update via patch semantics. 

Thanks,
Steve Speicher | IBM Rational Software | (919) 254-0645
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