25 Jul 2008

See also: IRC log


Ahmed Ezzat, Jim_Melton, Joe Betz, Jenny Green, Li Ma, Juan Sequeda, Ashok_Malhotra, Satya Sahoo, Wolfgang Halb, Andrew_Eisenberg




<Ashok> scribenick: joebetz

Approve minutes from July 11 telcon? No objections. Approved.

XG Logistics: F2F on 30th and 31th of Oct. About 12 people said they will attend

<scribe> ACTION:Wolfgang Halb to send details of F2F [recorded in http://www.w3.org/2008/07/25-RDB2RDF-minutes.html#action01]

This is the last telcon before the August break.

September the 5th will be next call. We will then start talking about our deliverables.

Please have email discussion about deliverables until we talk again

Satya: Literature survey - a couple more papers, will update wiki and send mail. Also preparing paper on same material.

XG deliverables: any comments? Send mail.

Presentation: Li Ma

<lma> http://esw.w3.org/topic/Rdb2RdfXG?action=AttachFile&do=get&target=SeDA2RDB2RDFXG.pdf

System similar to D2RQ server, enabled data to be exposed to the Linked Data web

Can be run w/o modifying database, but also can add temp tables to help with query

uses SPARQL, provides RDF and HTML browsers

ways to generate data:

export data using scripts into a triple store, query that

map sparql to sql and query db directly

SeDA queries the rdb directly to answer sparql queries

SeDA builds a semantic model for relational schemas

Uses inference, example: transitive closure, subsumption inference to determine indirect shareholders of a company

for efficiency SeDA performs reasoning during query processing to avoid materializing inferred results in advance

SPARQL pattern tree redirected to DataLog Engine to expand it

a single SQL statement is generated for a SPARQL query

uses D2RQ mapping

temporary tables are added for user defined rules reasoning

Inference subtrees are added to the SPARQL syntax tree, for recursive rules, structure cannot be in syntax tree but for all else put the logic in the tree

Implemented automatic UML -> OWL transformation

automatically generate D2RQ maping from schema and ontology

based on eclipse modeling framework (EMF)

Ashok: Can we access papers?

Can ask any more questions by email.

No more calls for about 6 weeks, next call Sept. 5

Summary of Action Items

[NEW] ACTION:Wolfgang Halb to create a page for f2f meeting. [recorded in http://www.w3.org/2008/07/25-RDB2RDF-minutes.html#action01]
[End of minutes]

Minutes formatted by David Booth's scribe.perl version 1.133 (CVS log)
$Date: 2008/07/25 16:04:27 $

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Present: +1.617.803.aaaa Jim_Melton joebetz +1.512.590.aabb [IBM_Watson] Juan Ashok_Malhotra [Microsoft] +43.316.876.aacc +1.408.285.aadd Andrew_Eisenberg
Got date from IRC log name: 25 Jul 2008
Guessing minutes URL: http://www.w3.org/2008/07/25-RDB2RDF-minutes.html
People with action items: item

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