- From: Jim Hendler <hendler@cs.umd.edu>
- Date: Tue, 26 Mar 2002 20:22:31 -0500
- To: Frank van Harmelen <Frank.van.Harmelen@cs.vu.nl>, www-webont-wg@w3.org
At 10:38 PM +0100 3/26/02, Frank van Harmelen wrote: >Guus Schreiber wrote: > >> I think we should consider the UML class model also as background >> reference. > >Below an indication of how RDF Schema, OWL Light and Full OWL score on >these. > >I'm using [1] for OWL Light and Full OWL, not taking into account >the proposed changes since then. >I'm also assuming semantic containment between RDF Schema and OWL Light >(and of course between OWL Light and Full OWL). > >- subclass relation > already in RDF Schema >- disjointness, > in OWL Light >- completeness (through constraints) > only in Full OWL >- attributes (datatype properties) and relations (object properties) > in OWL Light >- cardinality constraints for attributes and relations > in OWL Light for n=1 > only in Full OWL for arbitrary n >- default values for attributes > Not even in Full OWL I think the term "default" is used differently here - in UML the defaults can be, essentially, monotonic, in the sense that it is a default that a female mammal lactates to feed its young (this is definitional, no exceptions in the natural world) -- using the notion of default as "All of them have this value so it doesn't have to be specified on each" in Full OWL in OWL Light (I think - not 100% sure) >- class-scoped attributes (same for every member of class) > in OWL Light >- part-whole relations between classes (strong=composition,weak=agrregation) > Not even in Full OWL not built in - but it is clear that even in RDFS one can define part-whole properties - they just don't have special meaning. >- abstract vs. concrete class, root and leaf class > Not even in Full OWL >- tagging through stereotypes and tags > Unsure what this means (FvH) > >Question: is any of the above reason for satisfaction? concern? > >Frank. > ---- > >[1] http://www.cs.vu.nl/~frankh/spool/OWL-first-proposal/ -- Professor James Hendler hendler@cs.umd.edu Director, Semantic Web and Agent Technologies 301-405-2696 Maryland Information and Network Dynamics Lab. 301-405-6707 (Fax) AV Williams Building, Univ of Maryland College Park, MD 20742 http://www.cs.umd.edu/users/hendler
Received on Tuesday, 26 March 2002 20:22:57 UTC