[oslc-core] Fw: Oslc-Core Digest, Vol 3, Issue 30

Tue Apr 27 12:18:37 EDT 2010

In one of Arthur's use case, "Instance-based information, e.g. you are
given the URL of an instance resource and you want to find its shape".

So, I was given http://example.com/bugs/2314, and I don't want to get all
properties of the resource. So, I need to get its shape to construct a
query usign oslc.properties. How do I get the shape? If I follow the
proposal, it would be to do a get on http://example.com/bugs/2314 that
would return me ALL properties including oslc.instanceShape. So, it looks
like I won't be able to get its shape by given an URL, unless I do a get on
the resource first.

In order to achieve what I want to do, I guess I should do
http://example.com/bugs/2314?oslc.properties=oslc:instanceShape
that would return me the reference to the shape.
Then, I can get the shape and construct the query.

Is this the right thinking for the use of this new property
oslc:instanceShape.

Tack Tong
IBM Rational software
tacktong at ca.ibm.com
905-413-3232
tie line 313-3232
----- Forwarded by Tack Tong/Toronto/IBM on 04/27/2010 12:06 PM -----

Message: 4
Date: Tue, 27 Apr 2010 09:03:00 -0400
From: Dave <snoopdave at gmail.com>
To: Steve K Speicher <sspeiche at us.ibm.com>
Cc: oslc-core at open-services.net
Subject: Re: [oslc-core] How do I get the shape from a resource?
Message-ID:

<z2u8fb9ac721004270603xd8e6eecejf526e6fe3b3865cf at mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

I agree that an oslc:instanceShape property makes sense in common
properties.

I just added an issue to track this:

   1 %RED%OPEN%ENDCOLOR% Add an =oslc:instanceShape= property to allow
resources to specify their shape. See discussion here:
http://open-services.net/pipermail/oslc-core_open-services.net/2010-April/000143.html

(DaveJohnson 04/28/2010).
      * *Response* Yes, get this into spec (DaveJohnson 04/27/2010)

Thanks,
- Dave

On Tue, Apr 27, 2010 at 8:09 AM, Steve K Speicher <sspeiche at us.ibm.com>
wrote:
> Another thing to consider, or be aware of, ?(at least for XML-based
resource
> formats), is this recent work by W3C XML Core WG titled ?"Associating
> Schemas with XML documents 1.0" ?http://www.w3.org/TR/xml-model/
>
> We'd need to obviously still come up with something for non-XML based
> formats.
>
> So I'd still recommend a unique property for this.
>
> Thanks,
> Steve Speicher | IBM Rational Software | (919) 254-0645
>
>
> Arthur Ryman <ryman at ca.ibm.com> wrote on 04/26/2010 11:56:50 AM:
>
>> From: Arthur Ryman <ryman at ca.ibm.com>
>> To: Steve K Speicher/Raleigh/IBM at IBMUS
>> Cc: oslc-core at open-services.net, oslc-core-bounces at open-services.net
>> Date: 04/26/2010 11:56 AM
>> Subject: Re: [oslc-core] How do I get the shape from a resource?
>>
>> Steve,
>>
>> The rdf:type should be the OSLC type defined by the appropriate domain
>> spec, e.g. CM. It belongs to the OSLC domain, http://open-services.net).
, so
>> GETing it would NOT reflect any new properties added by a service
>> provider.
>>
>> I agree that it would be handy to be able to easily find the shape of a
>> resource. There are really two major use cases:
>>
>> 1. Schema-based information, e.g. to design a report. You need to find
the
>> shape from the service provider. This is what oslc:shape is for.
>>
>> 2. Instance-based information, e.g. you are given the URL of an instance
>> resource and you want to find its shape, e.g. to modify the instance via
>> PUT. There is no property defined yet. Using oslc:shape might be
>> confusing. In XML Schema, they introduced a special namespace for
instance
>> level information such as type, xsi:
>> http://www.w3.org/2001/XMLSchema-instance.
>>
>> To avoid confusion I suggest we ?use a different property, e.g.
>> oslc:instanceShape
>>
>> 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
>> Twitter | Facebook | YouTube
>>
>>
>>
>>
>>
>>
>>
>> From:
>> Steve K Speicher <sspeiche at us.ibm.com>
>> To:
>> oslc-core at open-services.net
>> Date:
>> 04/24/2010 03:06 PM
>> Subject:
>> [oslc-core] How do I get the shape from a resource?
>> Sent by:
>> oslc-core-bounces at open-services.net
>>
>>
>>
>> I had assumed that every OSLC defined resource would have an rdf:type
>> property that references either the spec defined Type URI OR is it a
>> gettable URI that references the service provider's hosted version of
the
>> resource shape.
>>
>> Here's my example, I have a OSLC-CM Change Request resource that looks
>> like:
>>
>> <oslc_cm:ChangeRequest ?rdf:about=".http://example.com/bugs/2314">
>> ? <rdf:type ?rdf:reference="
>> http://open-services.net/xmlns/cm/2.0#ChangeRequest">
>> </oslc_cm:ChangeRequest>
>>
>> Is it required for rdf:type to point to the OSLC defined Type URI? ? How
>> do I get to the resource shape of this resource?
>>
>> I would instead think that we'd want an OSLC Common Property called
>> "oslc:shape" which points to a gettable OSLC shape resource. ?Any
>> objections to adding this? ?Any need use dc:type here instead (or
clarify
>> how it could be used) ?
>>
>> Thanks,
>> Steve Speicher | IBM Rational Software | (919) 254-0645
>> _______________________________________________
>> Oslc-Core mailing list
>> Oslc-Core at open-services.net
>> http://open-services.net/mailman/listinfo/oslc-core_open-services.net
>>
>>
>>
>
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