[oslc-core] Provided guidance for adding relationship labels

[Ian Green1]

My understanding of the intent is that this is a property *on the link* 
and is not cached data from the object resource.  The anchor label is a 
property of the link, and *could have nothing whatsoever* to to with the 
object resource.  Other properties on the link (a la AM spec. are also 
admitted, however only dcterms:title is the only link property whose 
meaning is defined by CM V2.0). 

I agree with Jim that the present wording leaves room for an 
interpretation along the lines of cached data and I think we should strive 
to prevent this interpretation.  It is important that the label is on the 
link, and is not in any way necessarily describing the object resource. 
OSLC collaborators (consumers & providers) must not (i'd write MUST NOT if 
I could) treat that link property as a description of the object resource.

Something along these lines is what I was imagining:

Change Management relationships to other resources are represented as 
properties whose values are the URI of the object or target resource. When 
a Change Management relationship property is to be presented in a user 
interface, it may be helpful to provide an informative and useful textual 
label for that relationship instance.  (This in addition to the 
relationship property URI and the object resource URI, which are also 
candidates for presentation to a user.) To this end, OSLC providers MAY 
suppport a dcterms:title link property in Change Management resource 
representations, using the anchor approach outlined in the OSLC Core Links 
Guidance.


I've removed the reference to UI Preview - UI Preview is for resources, 
and these links are not resources.  If we bring link properties and UI 
Preview together, I suggest that be done elsewhere in some form of 
guidance. However, I would worry then that OSLC is straying too far into 
UX/UI guidelines.

best wishes,
    -ian

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

oslc-core-bounces at open-services.net wrote on 31/08/2010 20:22:27:

> [image removed] 
> 
> Re: [oslc-core] Provided guidance for adding relationship labels
> 
> James Conallen 
> 
> to:
> 
> Steve K Speicher
> 
> 31/08/2010 20:26
> 
> Sent by:
> 
> oslc-core-bounces at open-services.net
> 
> Cc:
> 
> oslc-cm, oslc-core
> 
> my 2c,
> 
> I worry about guidance that that suggests that it is ok to 
> essentially cache information about a resource that is being 
> referenced (and managed by) on another server. If this is to be a 
> practice, what are the recommendations for ensuring that this 
> information remains in sync. Looking at the referenced example, what
> happens if the owner of the resource 123 changes its title to 
> "Enhancement 123: Enable multi-root installs"? Will this have to be 
> manually updated? If not, does the system automatically update 
> properties of links whenever it detects them.
> 
> While I do recognize this may be a way to save a GET call. I don't 
> think it represents a best practice.
> 
> <jim/>
> 
> jim conallen
> CAM Lead Architect
> jconallen at us.ibm.com
> Rational Software, IBM Software Group
> 
> 
> 
> [image removed] Steve K Speicher---08/31/2010 02:47:42 PM---I wanted
> to call out some specification updates that was created for handling
> of relationship label
> 
> From: Steve K Speicher/Raleigh/IBM at IBMUS
> To: oslc-cm at open-services.net
> Cc: oslc-core at open-services.net
> Date: 08/31/2010 02:47 PM
> Subject: [oslc-core] Provided guidance for adding relationship labels
> Sent by: oslc-core-bounces at open-services.net
> 
> 
> 
> I wanted to call out some specification updates that was created for 
> handling of relationship labels on URI relationship properties.  Note 
the 
> support for this is optional but wanted to make sure this was done in a 
> uniform way across implementations.  Let me know if there are any issues 

> with this.
> 
> http://open-services.net/bin/view/Main/
> CmSpecificationV2#Labels_for_Relationships
> 
> Thanks,
> Steve Speicher | IBM Rational Software | (919) 254-0645
> 
> 
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