[oslc-core] Question on oslc.properties

[Arthur Ryman]

Ian,

The behavior you describe is correct. If you want nested properties, you 
need to request them explicitly. The fact that some node is blank should 
not alter the semantics of the query language. 

I think it is more reasonable to return a CBD when you request the 
resource /req/r1

Regards, 
___________________________________________________________________________ 

Arthur Ryman 

DE, PPM & Reporting Chief Architect
IBM Software, Rational 
Toronto Lab | +1-905-413-3077 (office) | +1-416-939-5063 (mobile) 





From:
Ian Green1 <ian.green at uk.ibm.com>
To:
oslc-core at open-services.net
Cc:
Brett Graf <brett.graf at uk.ibm.com>
Date:
03/14/2012 10:11 AM
Subject:
[oslc-core] Question on oslc.properties
Sent by:
oslc-core-bounces at open-services.net



Would someone confirm/clarify the behaviour of oslc.properties in the case 
of resources containing blank nodes? 


Consider the following RDF (turtle): 

@prefix dc: <http://purl.org/dc/terms/>. 
@prefix oslc_rm: <http://open-services.net/ns/rm#>. 
@prefix foaf: <http://xmlns.com/foaf/0.1/>. 
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>. 
@prefix doors: <http://doors.example.com/req/>. 

doors:r1 a oslc_rm:Requirement; 
   dc:title "Title"; 
   dc:contributor [ a foaf:Person; foaf:givenName "caligula" ]. 


The following request 
GET /req/r1?oslc.properties=* 
Host: doors.example.com 

Will return the following RDF: 
@prefix dc: <http://purl.org/dc/terms/>. 
@prefix oslc_rm: <http://open-services.net/ns/rm#>. 
@prefix foaf: <http://xmlns.com/foaf/0.1/>. 
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>. 
@prefix doors: <http://doors.example.com/req/>. 

doors:r1 a oslc_rm:Requirement; 
   dc:title "Title"; 
   dc:contributor [ ]. 


Which is not really that useful.   Nested properties could be requested 
but this may include more information that desired.  Beyond V2, what might 
be more useful is a concise bounded description [1] of the blank node to 
be included in the response. 

Any comments or clarifications? 

[1] http://www.w3.org/Submission/2004/SUBM-CBD-20040930/ 

best wishes,
   -ian

ian.green at uk.ibm.com (Ian Green1/UK/IBM at IBMGB)
Chief Software Architect, Requirements Definition and Management
IBM Rational




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