<Ashok> meeting RDB2RDF

<Ashok> scribenick: joebetz

<Ashok> RESOLUTION: Telcon on July 4 is cancelled

Notes from informal meeting at ESWC:

Themis Palpanas: Integration between databases using globally unique identifiers

Can we agree on common identifiers to be used across the web?

<Ashok> AShok: Are the identifiers URIs?

<Ashok> Themis: may not be.

<Ashok> Jenny Green: This may be an output from the groups -- DB identifiers vs. RDF identifiers

Ashok:Globally unique identifiers should be URIs since this is a w3c activity

Satya: There is a sub group of which identifiers should be associated with different domains (e.g. LSIDs)

<Ashok> Themis: OCCAM will create a facility to create global identifiers

Themis: Can distribute paper with general idea/architecture.

Catherine: Discussed importance of figuring out what we are going to standardize at ESWC.

Jenny: Do we want to limit ourselves to RDF or do we want to include OWL, etc?

Ashok: Yes, we should think about OWL.

Jenny: Might be good to start thinking about a name (i.e not RDB2RDF)

Another potential approach, company?

Ashok, what should we deliver? Background: this group will not write a standard, we can produce papers, surveys, and can recommend that W3C start a working group to standardize something.

Final report in Feb.

1. We should report the literature survey summary. Currently this is a wiki, can we convert this to a report?

Orri:Submit this as a report
... take wiki and convert this to a paper, all members add to it
... submit this to conf, what was the name?
... Generate more interest, create more discussions if we submit.

2. RDB to RDF Mapping

Ashok: we should at least write the outlines of a working group charter?
... we can do this in two directions, we can start w/ schema and write RDF. We can also start with ontology that does not precisely match data.

Jenny: Might be best to start with saying what needs to be in the mapping rather than recommending a language.

Start with requirements, and decide best approach from requirements.

Ashok: approach should both directions: RDB->RDF/OWL, OWL->Mapping, and we should work from requirements? Agreed.

3. Update Logs.

Update logs might be useful, but there is no sparql update language now. Ideas are out there: Andy Seaborne's Sparql/Update; there is another. Is update something we should examine?

Soeren: Need a log of which parts of the RDF have been updated. Keeping search indexes up-to-date, for example, would benefit from update notifications.

Soren: Has idea of what updates might look like.

Update notifications are not specific to RDB or mapping.

Andrew: Should be careful to keep group focused. While update logs are useful we might recommend for different working group to stay focused.

Ashok: 4. Translating SPARQL to SQL. If data is in database, translate SPARQ to SQL. Should we standardize?
... Standardize the algorithm that is. Concensus seems to be no.

Andrew: Groups can produce other types of artifacts as well. We could produce an applet or open source code to demonstrate translation.
... Would be specific to mapping the group produces.

Jenny: We may not always not want to map to SQL.
... Services or other intermediate layers might be between DB and SPARQL, might not want to target SQL specifically.

5. RDF Mapping of SQL Schema

Ashok: We could publish as W3C Note.

No great interest

We have a presentation on June 27 by Paul Tyson. Let's discuss after that.

Ashok: Will send out summary, request comments
... Presentation next week: Farid Cerbah on RDBtoOnto
... Think about how we get started? Volunteers are welcome to take on topics. Feel free to contact me privately.

Orri: Will try to prepare wiki page with detail of update ideas.

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Present: Andrew_Eisenberg +1.509.771.aaaa Ashok_Malhotra +1.408.285.aabb +1.857.362.aacc +039320463aadd [Microsoft]

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Got date from IRC log name: 13 Jun 2008
Guessing minutes URL: http://www.w3.org/2008/06/13-RDB2RDF-minutes.html
People with action items: 

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