Re: New Participant in the RDB2RDF Working Group

Dear Michael,

First of all I would like to congratulate the group for the excellent work,
I liked both draft and I think are easy to read and understand,  but I would
like to highlight some points.

- Assuming that the main reason for this type of mapping (RDB2RDF) is
  to share structured data on the Web as "Linked Data".
  [1] and [2] take into consideration blank node which is discourage when
  we try to publish Linked Data [3].
  Any alternative instead of work with blank nodes? (Just Guessing)

- I think the ForeignKey Class and properties (3.4) in [1] could be
  exemplified with some sample data in a table, and generated some triples.

- In [1] the part A.2.2 "Mapping Specification for the EMP table", I think
some triples
  are missing as it should exist in for RDFTypePropery
  ( e.g. rdf:type <xyz.com/emp/job/CLERK> )

- In [2] the part 2.2 "Preliminaries Generating IRIs", Is possible to
customize
  the Table IRI and/or Column IRI, in order to reuse some ontology terms
  as we can do with D2R server or Triplify?

Maybe some of these comments are very basics, but I'm relative newbie
in this field (2 years).

Thanks in advance for your help and considerations

Best Regards,

Percy

[1] http://www.w3.org/2001/sw/rdb2rdf/r2rml/
[2] http://www.w3.org/2001/sw/rdb2rdf/directMapping/
[3] http://www4.wiwiss.fu-berlin.de/bizer/pub/LinkedDataTutorial/



2010/11/25 Michael Hausenblas <michael.hausenblas@deri.org>

>
> > No problem, I already read both draft
> > and I have some comments about it.
> > Should I comment right now? or wait until
> > the next meeting?
>
> Please go ahead and share your insights with this list. No need to wait ;)
>
> Cheers,
>      Michael
>
> --
> Dr. Michael Hausenblas, Research Fellow
> LiDRC - Linked Data Research Centre
> DERI - Digital Enterprise Research Institute
> NUIG - National University of Ireland, Galway
> Ireland, Europe
> Tel. +353 91 495730
> http://linkeddata.deri.ie/
> http://sw-app.org/about.html
>
>
>
> > From: Percy Enrique Rivera Salas <privera.salas@gmail.com>
> > Date: Thu, 25 Nov 2010 21:01:14 -0200
> > To: Michael Hausenblas <michael.hausenblas@deri.org>
> > Cc: RDB2RDF WG <public-rdb2rdf-wg@w3.org>
> > Subject: Re: New Participant in the RDB2RDF Working Group
> >
> > Dear Michael
> >
> > I can't wait to the next meeting :-)
> >
> > No problem, I already read both draft
> > and I have some comments about it.
> > Should I comment right now? or wait until
> > the next meeting?
> >
> > Best Regards,
> >
> > Percy
> >
> > 2010/11/25 Michael Hausenblas <michael.hausenblas@deri.org>
> >
> >> Percy,
> >>
> >> Welcome and great to see that you've finally made it here ;)
> >>
> >> Looking forward to hear you next week and may I already ask you for a
> tiny
> >> bit of initial investment: you could have a look at [1] and [2] and
> review
> >> these two Editor's Drafts. You're sort of unbiased and I think we could
> get
> >> useful comments regarding readability and coverage from you. Just
> remember:
> >> this is not an academic review but it is about how clear something has
> been
> >> specified.
> >>
> >> Cheers,
> >>      Michael
> >>
> >> [1] http://www.w3.org/2001/sw/rdb2rdf/r2rml/
> >> [2] http://www.w3.org/2001/sw/rdb2rdf/directMapping/
> >>
> >> --
> >> Dr. Michael Hausenblas, Research Fellow
> >> LiDRC - Linked Data Research Centre
> >> DERI - Digital Enterprise Research Institute
> >> NUIG - National University of Ireland, Galway
> >> Ireland, Europe
> >> Tel. +353 91 495730
> >> http://linkeddata.deri.ie/
> >> http://sw-app.org/about.html
> >>
> >>
> >>
> >>> From: Percy Enrique Rivera Salas <privera.salas@gmail.com>
> >>> Date: Thu, 25 Nov 2010 20:11:30 -0200
> >>> To: RDB2RDF WG <public-rdb2rdf-wg@w3.org>
> >>> Subject: New Participant in the RDB2RDF Working Group
> >>> Resent-From: RDB2RDF WG <public-rdb2rdf-wg@w3.org>
> >>> Resent-Date: Thu, 25 Nov 2010 22:12:48 +0000
> >>>
> >>> Dear Group RDB2RDF
> >>>
> >>> First let me introduce myself, my name is Percy Rivera
> >>> Salas<http://www.inf.puc-rio.br/%7Epsalas/>and
> >>>  I'm a Master Student at Pontifical Catholic University of Rio de
> Janeiro
> >>> (PUC-Rio)
> >>> My advisory is the professor Dr. Karin
> >>> Breitman.<http://www-di.inf.puc-rio.br/%7Ekarin/>We work together
> >>> with the professor Dr. Daniel Schwabe<
> >> http://www-di.inf.puc-rio.br/schwabe/>
> >>>
> >>> My current research interests are:
> >>>
> >>>    - Database, Data Integration (Interoperability)
> >>>    - Linked Data, Semantic Web (Ontology Reuse)
> >>>
> >>> The main reason to be part of the RDB2RDF group is because
> >>>  in our laboratory we are seeing the possibility of *reusing ontology
> >> terms*
> >>> in the middle of the mapping process from RDB2RDF which, in our point
> of
> >>> view,
> >>> is the best way to expose the big silos of information (Deep Web).
> >>>
> >>> We expect share our experience, and learn from yours.
> >>>
> >>> Best Regards,
> >>>
> >>> Percy Rivera Salas
> >>
> >>
>
>