- From: Deborah L. McGuinness <dlm@ksl.Stanford.EDU>
- Date: Thu, 19 Aug 2004 14:02:09 -0700
- To: ewallace@cme.nist.gov
- CC: public-swbp-wg@w3.org
- Message-ID: <41251551.6070201@ksl.stanford.edu>
i brought up the issue of where we stood with respect to the units and measures conversation on today's telecon. I brought it up because i thought I had read in some irc logs a while ago that there was a request for us to provide a best practices note on units and measures ontologies. Because I had missed a few telecons I was not sure where we were with that and i wanted to make sure that we understood that doing a good job on a survey of ontologies could be a lot of work. There was some belief in today's telecon that guus may have offered to look at a particular units and measures proposal and provide some comments. (There is a caveat to this statement - we did not verify in real time exactly what guus had offered to do so we should check in with guus to find out what actually was agreed upon.) I also think that before we took on a conversion use for the semantic web, it would be useful to identify a prototypical use case that would be used to refer to to help make any modeling decisions. Gruber's ontology set on ontolingua does seem to have had a fair amount of visibility and reuse so it is a strong starting candidate. i do not know the answer to evan's question of work to add precision to it though. Deborah ewallace@cme.nist.gov wrote: >Where was this on the meeting agenda? > >Anyway, I agree that a pragmatic approach to this would be to pick an >existing ontology and convert it for SW use. Furthermore, the Gruber >ontology looks like a good starting point for this. However, as an >engineering math ontology it is deficient. Precision is an important >part of such math, and it is blissfully ignored in the Gruber and Olsen >paper. Without it there is not much one can say about Measurements for >that matter (with the exception of counts). Does anyone know of any work >to add precision to the Gruber ontology? If not, then perhaps we should >call any SW rendering of it merely a Units Ontology. > > >Uschold, Michael F wrote: > > >>There was some discussion at the recent telecon about what the OEP group >>might do related to units and measures. Possibilities include: >>1. Conversion activity: Take a single [the best one, ideally] units >>and measures ontology and convert it. >>2. Conduct a survey of existing ontologies for units and measures, >>a. Evaluation Activity: evaluate the various proposals >>b. Conversion activity: recommend the best one and convert it to >>OWL. >>3. Adaptation/Creation activity: Adapt and improve the best >>existing ontology and have it be a formal recommendation. >> >>The only one of these activities that has a reasonable chance of success >>with modest effort is 1. However, unless someone feels confident to pick >>a good one, it will be some effort to survey existing ones first. I >>have a lot of experience with Gruber's ontology, and can say with high >>confidence that it is very good, and would be a perfectly reasonable >>place to start. It could be a stake in the ground, and others could >>critique/evolve/adapt it as they saw fit. >> >>As Deb G. said in the telecon today, the other two tasks are opening >>Pandora's box. It is a lot of work to do a good survey and even more >>work to take those results and start on an official recommendation for a >>units and measures ontology. I belive this kind of activity is OUT of >>scope for the SWBPD WG. >> >>It is also possible that converting the Gruber ontology into OWL might >>itself be a challenging task, once you start to think how to do thing >>the *best* way, as opposed to a straight-forward translation. >> >> > > >-Evan > > > -- Deborah L. McGuinness Associate Director Knowledge Systems Laboratory Gates Computer Science Building, 2A Room 241 Stanford University, Stanford, CA 94305-9020 email: dlm@ksl.stanford.edu URL: http://ksl.stanford.edu/people/dlm (voice) 650 723 9770 (stanford fax) 650 725 5850 (computer fax) 801 705 0941
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