Agenda for Aug 17 Telcon

AGENDA W3C RDB2RDF Working Group Teleconference 2010-08-17 
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Tuesday, 17 August *16:00-17:00 UTC* Local time: 
http://www.timeanddate.com/worldclock/fixedtime.html?month=07&day=20&year=2010&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: Ashok

0. Scribe assignment

1. Admin PROPOSAL: Accept the minutes of last meeting, see 
http://www.w3.org/2010/08/10-rdb2rdf-minutes.html

2. Continue discussion on comments on SQL-based approach from Richard 
Cyganiak
- http://lists.w3.org/Archives/Public/public-rdb2rdf-wg/2010Aug/0004.html
- http://lists.w3.org/Archives/Public/public-rdb2rdf-wg/2010Aug/0006.html
- http://lists.w3.org/Archives/Public/public-rdb2rdf-wg/2010Aug/0005.html

3. Revised proposal from Souri
AGENDA W3C RDB2RDF Working Group Teleconference 2010-08-10 
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Tuesday, 10 August *16:00-17:00 UTC* Local time: 
http://www.timeanddate.com/worldclock/fixedtime.html?month=07&day=20&year=2010&hour=16&min=00&sec=0 
Bridge US: +1-617-761-6200 (Zakim) Conference code : 7322733# (spells 
"RDB2RDF")
Duration : 60 minutes
-------------------------------------------------------------------
IRC channel : #RDB2RDF on irc.w3.org:6665 W3C IRC Web Client : 
http://www.w3.org/2001/01/cgi-irc
Zakim information : http://www.w3.org/2002/01/UsingZakim
Zakim bridge monitor : http://www.w3.org/1998/12/bridge/Zakim.html
Zakim IRC bot : http://www.w3.org/2001/12/zakim-irc-bot.html 
-------------------------------------------------------------------
Chair: Ashok

0. Scribe assignment

1. Admin PROPOSAL: Accept the minutes of last meeting, see 
http://www.w3.org/2010/08/03-rdb2rdf-minutes.html

2. Conclude discussion of Richard's comments on SQL-based approach  
http://lists.w3.org/Archives/Public/public-rdb2rdf-wg/2010Aug/0004.html

3. Revised SQL-based proposal from Souri
http://www.w3.org/2001/sw/rdb2rdf/wiki/An_XML_Schema_for_SQL-based_RDB2RDF_Mapping_%28Revision_1%29 

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


Further, Souri says:
I am still not sure about a few things, most importantly

- 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.

5. AOB

4. Discussion on next steps for SQL-based approach.

5. AOB
-- 
All the best, Ashok

Received on Tuesday, 17 August 2010 00:09:31 UTC