RDB2RDF WG agenda for 2010-08-31 meeting 1600 UTC

All,

Below the agenda for tomorrow's meeting.

Cheers,
      Michael

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AGENDA Teleconference
W3C RDB2RDF Working Group telephone conference 2010-08-31
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Tuesday, 31 August *16:00-17:00 UTC* Local time:
http://www.timeanddate.com/worldclock/fixedtime.html?month=08&day=31&year=20
10&hour=16&min=00&sec=0
Bridge US: +1-617-761-6200 (Zakim) Conference code : 7322733# (spells
"RDB2RDF")
Duration : 60 minutes
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Chair: Michael
Scribe: Boris


1. Admin PROPOSAL: Accept the minutes of last meeting, see
http://www.w3.org/2010/08/24-rdb2rdf-minutes.html


2. Revised proposal from Souri
http://www.w3.org/2001/sw/rdb2rdf/wiki/An_XML_Schema_for_SQL-based_RDB2RDF_M
apping_%28Revision_1%29

Souri's comment:
Regarding Comment 2.5 (Lookup Table): How can we translate a SPARQL
query with FILTER involving transformed values?

 Example: Consider the following SPARQL query involving a property,
:transfProp, whose values are transformed, via a lookup table, into (-1)
times the original value
      (e.g., 10 in an INTEGER column, i.e., "10"^^xsd:integer in RDF, is
transformed into "-10"^^xsd:integer):

      SELECT ?x ?y WHERE {?x  :transfProp ?v1 . ?y   :transfProp  ?v2 .
FILTER (?v1 > ?v2)}

       How can SQL know, without having the lookup table somehow
specified (in a CASE statement or something equivalent), how to evaluate
the FILTER clause?


3. Test Cases
Kick-off the discussion around test cases, see
http://www.w3.org/2001/sw/rdb2rdf/test-cases/

Boris volunteered to be process owner re TC and will give some background on
purpose and approach.


4. What are we going to do about the Default Mapping?  Separate document?
Who can start a document for discussion?  Juan, Eric, Souri?


5. Discussion on next steps for SQL-based approach.
Create FPWD? Who volunteers for editing this?


6. Syntax discussion
See post from Richard and follow-ups on mailing list
http://lists.w3.org/Archives/Public/public-rdb2rdf-wg/2010Aug/0038.html

Options are:

 + custom syntax
   http://lists.w3.org/Archives/Public/public-rdb2rdf-wg/2010Aug/0055.html

 + RDF/Turtle
   http://www.w3.org/2001/sw/rdb2rdf/wiki/R2RML_in_Turtle

 + XML
  
http://www.w3.org/2001/sw/rdb2rdf/wiki/Example_of_SQL-based_RDB2RDF_Mapping:
_Revision_1


7. AOB

-- 
Dr. Michael Hausenblas
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

Received on Monday, 30 August 2010 15:03:03 UTC