New use case - story form

Action: JimH elaborate his proposed use case (RDFS/OWL related) in story form

I propose something similar to this, I would ask the editor to help 
me make it a little more human readable - but wanted to try to be 
relatively unambiguous (see notes below)

2.x  RDFS/OWL  schema repository query, a new social networking site powered by the popular 
FOAF ontology, has written a crawler which follows foaf:knows links 
to determine the publicly available properties of new people it will 
invite into the network.   While processing it finds a rdf:property referring to 
a  URI  that it has not previously encountered.  The crawler queries 
a schema server's RDF graph to see if the property's domain(s) and 
range(s) are ones that it has already encountered, so it can usefully 
use this new property in future searches.


1 - This is more or less a real use case, names have been changed to 
protect the innocent (but look at for an example of the sort 
of "new property" that we might encounter)

2 - while it is vaguely possible that some sort of inference 
procedure could be used for determining domains and ranges, I have 
seen no such use to date - so I hope this will be more palatable to 
Rob than owl:inverseFunctional or other restriction forms, even 
though those query graphs would be a bit more interesting.

3 - the existence of such schema servers are predicated in part on 
the fact that I know of several organizations, including mine, that 
are building these to host large ontologies -- for example, we will 
soon have an online, queryable version of the NCI ontology hosted in 
Kowari available for various kinds of queries -- and we will commit 
to using it to test the DAWG langauge/protocols as they evolve -- the 
NCI ontology is huge and it was HTTP-GET'ed from our site about 215 
times in May accounting for 5778827 Kbytes of traffic (about 30% of 
our activity), and we've already had 150 downloads in June 
(accounting for nearly 40%) -- so we are desperately looking for 
another way to provide information for users just looking for some 
specific content from this huge beast.

Professor James Hendler 
Director, Semantic Web and Agent Technologies	  301-405-2696
Maryland Information and Network Dynamics Lab.	  301-405-6707 (Fax)
Univ of Maryland, College Park, MD 20742	  240-277-3388 (Cell)

Received on Wednesday, 16 June 2004 15:32:22 UTC