Re: [oslc-core] Use of oslc:Property to define usage of rdf:type?

From
Nick Crossley <>
Date
2015-08-04T16:12:46+00:00
ID
Thread
Re: [oslc-core] Use of oslc:Property to define usage of rdf:type?
Ian,

I would have thought that my language "A resource type URI. An Activity MUST have a resource type of <code>oslc_config:Activity</code>,  and MAY have other types" does not really need any special interpretation - it seems very explicit to me. My text replaced the phrase used in several other OSLC 3 draft specs, including change management, which says "The resource type URIs. One of at least has the value of <code>http://open-services.net/ns/cm#ChangeRequest</code>." The latter is of course not grammatically correct.

The W3C LDP spec uses this explanation: "The representation of a LDPC MAY have an rdf:type of ldp:Container for Linked Data Platform Container. Non-normative note: LDPCs might have additional types, like any LDP-RS." Would you prefer the OSLC shapes used this phrase (with MUST rather than MAY where appropriate)?

Or is your question more fundamental - do you think that the OSLC Shape, using oslc:Property resources, should not include any mention of rdf:type? If so, given that our specs now generate the resource description tables from shapes, where would we put descriptions of the requirements on rdf:type? Why would type be treated differently from any other property that might have similar semantics - one value defined by the standard, others possible for provider-specific extensions?

Nick.

Ian Green1 ---08/04/2015 08:04:41 AM---I should have put my question differently.  Where is it defined that  Nick's interpretation/usage of

From:	Ian Green1 <>

To:	Martin P Pain <>

Cc:	Nick Crossley/Irvine/IBM@IBMUS, OASIS () <>

Date:	08/04/2015 08:04 AM

Subject:	Re: [oslc-core] Use of oslc:Property to define usage of rdf:type?

I should have put my question differently.  Where is it defined that Nick's interpretation/usage of oslc:Property is the one he intends? 

best wishes,

   -ian

 (Ian Green1/UK/IBM@IBMGB)

IBM 

<> wrote on 04/08/2015 13:08:55:

> From: Martin P Pain/UK/IBM@IBMGB 

> To: Ian Green1/UK/IBM@IBMGB 

> Cc: Nick Crossley <>, OASIS (oslc-

> ) <> 

> Date: 04/08/2015 13:09 

> Subject: Re: [oslc-core] Use of oslc:Property to define usage of rdf:type? 

> Sent by: <> 

> 

> If it's zero-or-many or one-or-many how often would you need to 

> constrain all values? 

> the *-or-many occurs values are the main point of extensibility - if

> the client doesn't understand all values (because others are 

> extensions), it can doits best with the ones that it does understand. 

> I expect there are times when you would need to - for example a 

> server advertising its own resource shapes that can't handle 

> unrecognised values (i.e. doesn't store everything it receives in a 

> triple store), but for use in the specs I expect leaving it open 

> would be the default. 

> 

> Just my thoughts...

> 

> 

> 

> 

> Martin Pain

> Software Developer - Green Hat

> Rational Test Virtualization Server, Rational Test Control Panel 

> 

> Phone: +44 (0)1962 815317 | Tie-Line: 37245317

> E-mail: 

> Find me on: [image removed]  and within IBM on: [image removed]   

> 

> [image removed] 

> 

> 

> 

> 

> IBM United Kingdom Limited Registered in England and Wales with 

> number 741598 Registered office: PO Box 41, North Harbour, 

> Portsmouth, Hants. PO6 3AU 

> 

> 

> 

> From:        Ian Green1/UK/IBM@IBMGB 

> To:        Nick Crossley <> 

> Cc:        OASIS () <oslc-

> > 

> Date:        04/08/2015 13:04 

> Subject:        Re: [oslc-core] Use of oslc:Property to define usage

> of rdf:type? 

> Sent by:        <> 

> 

> 

> 

> I've not noticed it being used with this interpretation.  So how 

> would one define a Property which covered all occurrences of a 

> multi-valued property? 

> 

> 

> 

> 

> best wishes,

>   -ian

> 

>  (Ian Green1/UK/IBM@IBMGB)

> IBM 

> 

> <> wrote on 30/07/2015 14:43:06:

> 

> > From: Nick Crossley <> 

> > To: Ian Green1/UK/IBM@IBMGB 

> > Cc: OASIS () <>

> > Date: 30/07/2015 14:43 

> > Subject: Re: [oslc-core] Use of oslc:Property to define usage of rdf:type? 

> > Sent by: <> 

> > 

> > Ian wrote: 

> > 

> > In https://tools.oasis-open.org/version-control/browse/wsvn/oslc-

> > ccm/trunk/specs/config-mgt/activity-shapes.ttl the rdf:type of and 

> > oslc:Activity is described: 

> > 

> > <#acttype> 

> >    a                        oslc:Property ; 

> >    oslc:name                "type" ; 

> >    oslc:propertyDefinition  rdf:type ; 

> >    oslc:occurs              oslc:One-or-many ; 

> >    oslc:readOnly            true ; 

> >    oslc:representation      oslc:Reference ; 

> >    oslc:valueType           oslc:Resource ; 

> >    dcterms:description      """A resource type URI. An Activity MUST

> > have a resource type of <code>oslc_config:Activity</code>, 

> > and MAY have other types."""^^rdf:XMLLiteral . 

> > 

> > rdf:type is multi-valued but the description made by <#actype> is 

> > particular to exactly one of those values, not all of them (I assume

> > that is the intention). 

> > Yes, that is the intention. It is common for OSLC shapes to define 

> > one or more of the required rdf:type values but leave it open for 

> > others to be applied.

> > 

> > Nick. 

> Unless stated otherwise above:

> IBM United Kingdom Limited - Registered in England and Wales with 

> number 741598. 

> Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU 

> 

> Unless stated otherwise above:

> IBM United Kingdom Limited - Registered in England and Wales with 

> number 741598. 

> Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU

Unless stated otherwise above:

IBM United Kingdom Limited - Registered in England and Wales with number 741598. 

Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU