- From: Drew McDermott <drew.mcdermott@yale.edu>
- Date: Sun, 21 Apr 2002 07:36:56 -0400 (EDT)
- To: drager@bbn.com, www-rdf-logic@w3.org
- CC: drew.mcdermott@yale.edu
Hello, Dave -- In your capacity as keeper of the DARPA/SONAT ontologies, I have a question about the "instance data." I am cc-ing www-rdf-logic because there seems to be a general issue here about how DAML datasets work. These ontologies are found at http://www.daml.org/experiment/ontology/ and I don't think they're sensitive (or they would be https: instead of http:). The file af-a.daml is RDF, rather than DAML, and appears to consist of "instance data," not ontology. Here is the beginning of that file: <rdf:RDF xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns#' xmlns:rdfs='http://www.w3.org/2000/01/rdf-schema#' xmlns:NS0='http://www.daml.org/experiment/ontology/beta/elements-ont#' > <rdf:Description rdf:about='http://www.daml.org/2001/12/factbook/af.daml#A1202'> <NS0:country rdf:resource='http://www.daml.org/2001/09/countries/fips#AF'/> <rdf:type rdf:resource='http://www.daml.org/2001/12/factbook/factbook-ont#Port'/> <rdfs:label>Kheyrabad</rdfs:label> </rdf:Description> My problem is this: Wouldn't it be much more informative if this line xmlns:NS0='http://www.daml.org/experiment/ontology/beta/elements-ont#' were supplemented by something like this: <daml:imports rdf:resource="http://www.daml.org/experiment/ontology/beta/elements-ont#"/> But it's not clear where this would go. Is it supposed to be the case that just mentioning an ontology's namespace means that the file uses that ontology? I find that rather disconcerting. For the time being, we'll make that assumption, but this seems like a bug (or gap) in the DAML spec. There ought to be an official way to say "This RDF file is based on ontologies X, Y, and Z." -- Drew McDermott
Received on Sunday, 21 April 2002 07:37:00 UTC