See also: IRC log
<Ashok> scribenick: juansequeda
Telcon on Nov 28 cancelled.
Next call will be Dec 5
Minutes of Nov 7 are approved
Michael started to work with Themis on use cases for ENS: http://esw.w3.org/topic/Rdb2RdfXG/ReusableIdentifier
Michael will be scheduled for the next call to talk about ENS
Ashok will contact Bijan and Chris Bizer for their material
We will have more discussion about Survey over email
<ssahoo2> Survey document URL: http://esw.w3.org/topic/Rdb2RdfXG/StateOfTheArt?action=AttachFile&do=get&target=RDB2RDF_SurveyReport.doc
<hellmann> im here
<Ashok> Are you on the phone?
<hellmann> my microphone is not working
<Ashok> Prakash's presentation http://asio.bbn.com/rdb2rdf/AsioRDB2RDF-1.ppt
<Ashok> Ontology http://asio.bbn.com/rdb2rdf/ds_ont.n3.txt
<Ashok> http://asio.bbn.com/rdb2rdf/ds_ont_map.n3.txt
Asio Parliament is a high performance triple store
Asio Scout is used for integrating hetergenous data sources
Each semantic bridge is a semantic cover.
the bridges takes the sparql query and translate it to the data sources natural format
i.e Relational Database Semantic Bridge translates SPARQL to SQL, and returns the relational data to RDF
There is an ontology for each data source
Orri: what happens if in a dept, there are different types of customers?
Prakash: besides the individual ontology, there is a domain ontology where SWRL is used for the mapping
Snoggle is a graphical tool that lets you write SWRL rules between data source ontologies and domain ontologies
Ashok: why create the data source ontology and map it to the domain ontology? why have this middle step?
The data source ontology could be reused
Asio Automapper extracts the data source ontology.
Asio Automapper is a direct mapping technique
All the transformation can be done in the semantic web space
SPARQL query is written intial. Semantic Query Decomposition uses SWRL to decompse the query and send it to each semantic bridge
What happens if two data sources return conflicting results?
Not part of Asio's scope right now
Automapper generates an ontology from the RDB schema, and also a "mapping ontology"
Autogenerated mapping file is based on d2rq
the mappings are from relational data types to xml datatypes
The configuration file overwrites what is in the relational schema
i.e if the schema doesnt have a FK, then it is implemented in the config file
<Ashok> <Ashok> Ontology http://asio.bbn.com/rdb2rdf/ds_ont.n3.txt <Ashok> http://asio.bbn.com/rdb2rdf/ds_ont_map.n3.txt
mapping is between the data source and the datasource ontology. this mapping is used by the bridge for the query translation
<AxelPolleres> Ijumped in late: can someone say in what sense is this SWRL mappings are different from Eric's canonical mapping and then map by SPARQL? (despite that the mapping SQL to RDF is nor canonical?)
With SWRL, it is query rewriting, and the rules are chainable, while that is not possible in SPARQL
<AxelPolleres> SWRL rules are chainable, which is not the case for the one-shot SPARQL mapping proposed by Eric... ok. got it
<scribe> New features of OWL 2 will enhance the capabilities of Automapper
Axel will present on Dec 5 about using RIF as the mapping language
Need to discuss Ivan's comments on the use cases
Need to comment on the Survey paper
<hellmann> bye
This is scribe.perl Revision: 1.133 of Date: 2008/01/18 18:48:51 Check for newer version at http://dev.w3.org/cvsweb/~checkout~/2002/scribe/ Guessing input format: RRSAgent_Text_Format (score 1.00) Succeeded: s/Sate/State/ Found ScribeNick: juansequeda Inferring Scribes: juansequeda Default Present: +1.617.873.aaaa, +1.512.471.aabb, Mike_Dean, whalb, Ashok_Malhotra, +49.322.222.0.aadd, +0238033aaee, AxelPolleres Present: +1.617.873.aaaa +1.512.471.aabb Mike_Dean whalb Ashok_Malhotra +49.322.222.0.aadd +0238033aaee AxelPolleres Got date from IRC log name: 21 Nov 2008 Guessing minutes URL: http://www.w3.org/2008/11/21-RDB2RDF-minutes.html People with action items: WARNING: Input appears to use implicit continuation lines. You may need the "-implicitContinuations" option.[End of scribe.perl diagnostic output]