RDB2RDF WG agenda for 2010-08-24 meeting 1600 UTC

All,

Please find below the agenda for tomorrow's meeting (kindly provided by
Ashok, thanks!) - looking forward meeting you all again!

Cheers,
        Michael

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AGENDA Teleconference
W3C RDB2RDF Working Group telephone conference 2010-08-24
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Tuesday, 24 August *16:00-17:00 UTC* Local time:
http://www.timeanddate.com/worldclock/fixedtime.html?month=08&day=24&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

0. Scribe assignment

1. Admin PROPOSAL: Accept the minutes of last meeting, see
http://www.w3.org/2010/08/17-rdb2rdf-minutes.html

2. Conclude discussion on comments on SQL-based approach from Richard
Cyganiak
- http://lists.w3.org/Archives/Public/public-rdb2rdf-wg/2010Aug/0004.html
Richard was not on the call last week.
We discussed his Section 3 comments
There was discussion on URI Templates
Souri also had a question on large Lookup Tables see below.
There was discussion about the dangers of SQL injection

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

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

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?

4. Discussion on next steps for SQL-based approach.   Create FPWD?

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

6. 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, 23 August 2010 12:49:22 UTC