[oslc-cm] Updated State Predicates Proposal

[Steve K Speicher]

Looks good but still this statement stands out as seeming like they are 
required:
   "Predicates MUST be queryable."
I propose this change:
   "If a service provider supports state predicates on change requests, 
then the state predicates MUST be queryable"

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

> From: Samuel Padgett/Durham/IBM at IBMUS
> To: oslc-cm at open-services.net, 
> Date: 06/20/2012 07:45 AM
> Subject: [oslc-cm] Updated State Predicates Proposal
> Sent by: oslc-cm-bounces at open-services.net
> 
> Following up on the state predicate thread [1] for spec Issue 12 [2], I 
> propose to following revised text to the state predicate section of the 
CM 2.0 spec.
> 
> "Predicates are exposed as OPTIONAL single-value properties on a Change 
> Request resource, often read-only. An attempt to update read-only 
predicates
> SHOULD be answered with a 409 Conflict HTTP status code. Their presence 
in a
> resource representation used for an update via PUT MUST NOT prevent the 
> resource from being updated. Predicates MUST be queryable. If a consumer 

> includes predicates in oslc.where, oslc.select, or oslc.properties 
request 
> parameters, the provider MUST NOT respond with an error code based 
solely on
> the inclusion of the predicates alone, even if the provider does not 
> implement predicates. The Change Request resource definition sections 
> defines the complete set of predicates."
> 
> The revised text explicitly says predicates are optional, but also says 
that
> they must not cause errors if included in requests.
> 
> [1] 
http://open-services.net/pipermail/oslc-cm_open-services.net/2012-March/
> 000361.html
> [2] http://open-services.net/bin/view/Main/CmSpecV2Issues
> [3] http://open-services.net/bin/view/Main/CmSpecificationV2?
> sortcol=table;up=#State_Predicates
> -- 
> Best Regards,
> Samuel Padgett | IBM Rational | spadgett at us.ibm.com
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