[oslc-core] OSLC Core spec query shapes example

[Arthur Ryman]

Dave,

I looked at the example and have a comment. In the query response use use 
the following attribute value [1]:

rdf:about="
http://example.com/query?oslc.from=blog:comment&oslc.where=blog:entry=<http://example.com/blogs/entry/42&gt
;"

We discussed this many months ago (perhaps before you joined OSLC) and 
came to the conclusion that although we are indeed sending the HTTP 
request to that URL, the response contains a set of triples and the 
triples must have the correct subject nodes, which in this case means that 
the rdf:about attribute must be just the query base URL. Recall that the 
meaning of rdf:about is simply to set the subject node for a set of 
triples that are formed from the following property elements. The correct 
value is therefore:

rdf:about="http://example.com/query"

I do agree that it seems useful to include the full query URL. The client 
already knows that since it sent the request. However, to make it an 
explicit part of the response, the appropriate place would be inside the 
ResponseInfo resource. We'd introduce a new property for that, e.g. 
oslc:request

[1] 
http://open-services.net/bin/view/Main/OslcCoreQueryDiscussion?sortcol=table;up=#Executing_Queries

Regards, 
___________________________________________________________________________ 

Arthur Ryman, PhD, DE


Chief Architect, Project and Portfolio Management

IBM Software, Rational

Markham, ON, Canada | Office: 905-413-3077, Cell: 416-939-5063
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From:
Dave <snoopdave at gmail.com>
To:
oslc-core <oslc-core at open-services.net>
Date:
05/04/2010 05:21 PM
Subject:
[oslc-core] OSLC Core spec query shapes example
Sent by:
oslc-core-bounces at open-services.net



To better understand how queries work in the OSLC Core spec today,
here's an example that shows how to define a blogging service with
blog entries, blog comments and a query capability that can query
across both types of resources.

  http://open-services.net/bin/view/Main/OslcCoreQueryDiscussion

Examples are provided in RDF/XML of these resources:
- Blog Entry, Blog Comment and Query Resource shapes
- Service Provider
- Query response

Thanks to Arthur for a quick review and the one query URI example in
the document.

Feedback is welcome, as are additional query URI examples.

Thanks,
Dave

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