- From: Mork, Peter D.S. <pmork@mitre.org>
- Date: Tue, 22 Aug 2006 08:49:59 -0400
- To: "Kashyap, Vipul" <VKASHYAP1@PARTNERS.ORG>, <donald.doherty@brainstage.com>
- Cc: <public-semweb-lifesci@w3.org>
>> This is the approach adopted by caBIG. Individual data models (or >> schemata) are related to a common ontology. By itself, this doesn't >> allow one to rewrite queries (because of tacit assumptions present in >> the respective data models?), but the hope is that development of >> query-mediators will be facilitated by the existence of a loose >> mapping. > >[VK] Is the CaBIG project also developing these query mediators? If yes, >are >they SQL or XQuery based? I think they are not into RDF (but I may be >mistaken) To the best of my knowledge, at this time they have not addressed query mediation. The mediation slides suggest that the intended query language will be XQuery-based, but we are talking about PowerPoint-ware. Currently, each data resource (relation or attribute) is annotated with terms drawn from the NCI thesaurus (which is expressed in OWL). Using this infrastructure, you can search the participants' schemata using terms drawn from the thesaurus. Once you have identified the relevant data resources, you could choose to develop a mediator to address subtle differences in assumptions/syntax/etc. Thus, in caBIG, the role of the ontology is to facilitate data discovery more than data interoperability.
Received on Tuesday, 22 August 2006 12:53:31 UTC