Re: [odata] Re: Request for Discussion on relation bewteen OData and W3C's R2*

[jwillson@dssltd.com]

Hi Giovanni, this is an important area for me; however, I also think
this requires either careful thought or a mini-presentation / white
board scrum at say a F2F for agreement or consensus.  I believe I
understand the concepts, metaphors, and analogies; and would like an
Occam's razor for implementation; but note the emphasis of
communication, server, client, and mobile device in the intention of
the different conventions and/or standards as written. 
  
 Another approach would be to schedule this as it's own topic;
however, then I think it has to be delayed until overall progress is
demonstrated.
  
 John Willson
  
  
 On Tue, 21 Aug 2012 23:31:44 +0200, Giovanni Bartolomeo
<giovanni.bartolomeo@uniroma2.it> wrote:
Dear Stefan,
> option B) is ok with me.
>
> Best Regards,
> Giovanni
>
>
> Def. Quota Stefan Drees <stefan@drees.name>:
>
> > Dear Giovanni,
> >
> > based on the result from discussion during meeting#3 of OData TC >
> (below under details the snippet from the minutes) and the
> > fact that there was no subsequent discussion in this regard on the
> > mailing list
> > I hereby - as a co-member of the tc - kindly suggest, that we do
> not > discuss this in the current state during meeting#4 and I
> further > propose, that you either
> >
> > A) file a JIRA-Issue against the CSDL component (I guess)
> > or maybe OData (in general?) to foster further discussion
> >
> > or
> > B) that we let the issue ripen further before we discuss it again
> > upon request by a member
> >
> > What do you think?
> >
> > @All: What do the other members think?
> >
> > This topic is at least alive. There has been a fresh blog entry >
> advertising from the Semantic Web Group at W3C: (Call for Review: >
> 'R2RML: RDB to RDF Mapping Language' and 'A Direct Mapping of >
> Relational Data to RDF' Proposed Recommendations >
> Published)[http://www.w3.org/News/2012#entry-9535] (from 2012-AUG-14)
> >
> > Additional Idea:
> > Maybe feedback from OData TC members in direction to the >
> W3C-Initiative would be helpful? I understood, that OData's >
> storage-agnostic "Orchestration"-Approach makes it a potential >
> superset of storage-dependant interfaces.
> >
> >
> >
> > Details from notes of meeting#3:
> >
> > Discussion:
> >
> > Giovanni
> >> I think that both the OData TC and W3C RDB2RDF are trying to >>
> address the same issue. RDB2RDF is an attempt to raise the level of
> >> abstraction from relational data to RDF (a model based on graphs),
> >> similarly OData does but using an entity relationship model. What
> >> they have in common is that they use HTTP and URI refs to access
> >> information and put it on the Web, the former using a RDF model
> and >> the latter using an ER model.
> >
> > Pablo comments on Giovanni's question:
> >> Most applications of OData at the moment do not build their
> service >> interface directly on top of a database, but mostly onto
> some >> additional (federating) business logic like catalogs. He
> recommends >> to understand OData **not** as exposing databases, but
> exposing a >> more abstract business logic.
> >
> > Mike
> >> He sees it mostly like Pablo, and adds that 1. the vocabulary used
> >> is well separated from concrete storage models. So we expose a >>
> model, not a database. 2. ODatas data model is an entity >>
> relationship model. It is an abstract model, well separated from >>
> the more physical aspects of the realization of the server side >>
> storag. Might be a relational store, a web server, a triplet store >>
> and so on.
> >
> > Ashok Malhotra (Oracle)
> >> The W3C Proposed Recommendations are at: [R2RML: RDB to RDF
> Mapping >> Language](http://www.w3.org/TR/2012/PR-r2rml-20120814/)
> and [A >> Direct Mapping of Relational Data to >>
> RDF](http://www.w3.org/TR/2012/PR-rdb-direct-mapping-20120814/)
> >
> > Giovanni
> >> States that his personal view is that app developers would benefit
> >> from having a uniform way to access this information and the way
> >> the URI is built is an important aspect of the matter.
> >
> > Chair calls in since allocated time is over. Suggests to continue >
> and perhaps talk in next meeting again on this issue raised by >
> Giovanni.
> >
> >
> > All the best,
> > Stefan.
> >
> >
>
>
>
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