[oslc-core] Oslc-Core Digest, Vol 11, Issue 24

[Martin Nally]

>> the RDF representation of T SHOULD satisfy the OSLC Domain specification
that defines T.

Have you thought about what this means for versioning? Does this mean the
2.0 version of the OSLC specification? All past and future versions? I
think this will open a can of worms. I think we should make the opposite
statement - that when something says it is of some OSLC type, this carries
no guarantees whatever. Caveat emptor.

Best regards, Martin

Martin Nally, IBM Fellow
CTO and VP, IBM Rational
tel: +1 (714)472-2690



                                                                                                                                                      
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  To:         oslc-core at open-services.net                                                                                                             
                                                                                                                                                      
  Date:       12/09/2010 12:00 PM                                                                                                                     
                                                                                                                                                      
  Subject:    Oslc-Core Digest, Vol 11, Issue 24                                                                                                      
                                                                                                                                                      
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Today's Topics:

   1. Re: Resources that have Multiple rdf:type Values (Arthur Ryman)


----------------------------------------------------------------------

Message: 1
Date: Wed, 8 Dec 2010 17:25:40 -0500
From: Arthur Ryman <ryman at ca.ibm.com>
To: Dave <snoopdave at gmail.com>
Cc: oslc-core at open-services.net
Subject: Re: [oslc-core] Resources that have Multiple rdf:type Values
Message-ID:

<OFBE176E2F.3D444635-ON852577F3.007A354B-852577F3.007B3507 at ca.ibm.com>
Content-Type: text/plain; charset="US-ASCII"

Dave,

I was pointing out the status quo. However, our desire is that types be
used in a predictable way.

I am recommending that we add an explicit statement to our spec to avoid
"capricious" use of OSLC-defined types. We don't "enforce" this via an
ontology so we need to provide explicit guidance in the Core spec.

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





From:
Dave <snoopdave at gmail.com>
To:
Arthur Ryman/Toronto/IBM at IBMCA
Cc:
oslc-core at open-services.net
Date:
12/08/2010 04:56 PM
Subject:
Re: [oslc-core] Resources that have Multiple rdf:type Values



On Wed, Dec 8, 2010 at 12:22 PM, Arthur Ryman <ryman at ca.ibm.com> wrote:
> At the Core telecon today, Jim raised this topic. We need to continue
the
> discussion. Here is a suggestion for how to handle this:
>
> Any RDF resource representation MAY contain zero or more triples that
have
> a given URI, S, as the subject, and rdf:type as the predicate,  If there
> is a triple of the form (S, rdf:type, T) where T is a type URI defined
by
> some OSLC Domain specification, then the RDF representation of T SHOULD
> satisfy the OSLC Domain specification that defines T.

I thought you argued against this point today, saying that you can
only make that sort of inference when you that a resource is provided
by a service that implements an OSLC specification.

- Dave







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End of Oslc-Core Digest, Vol 11, Issue 24
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