- From: Eric Prud'hommeaux <eric@w3.org>
- Date: Mon, 23 Aug 2010 10:28:03 -0400
- To: Michael Hausenblas <michael.hausenblas@deri.org>
- Cc: RDB2RDF WG <public-rdb2rdf-wg@w3.org>
* Michael Hausenblas <michael.hausenblas@deri.org> [2010-08-23 13:48+0100]
>
> All,
>
> Please find below the agenda for tomorrow's meeting (kindly provided by
> Ashok, thanks!) - looking forward meeting you all again!
>
> Cheers,
> Michael
>
> ---------------------------------------------------------
> AGENDA Teleconference
> W3C RDB2RDF Working Group telephone conference 2010-08-24
> ----------------------------------------------------------
> 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
> -------------------------------------------------------------------
> 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: 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?
That was my intention for http://www.w3.org/2001/sw/rdb2rdf/directGraph/
It's meant to be thorough with respect to compound/composite keys, and
in spec form. Edit feedback from all encouraged.
> 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
>
>
>
--
-ericP
Received on Monday, 23 August 2010 14:28:40 UTC