Re: Coordination between RDF(S) and DAML+OIL

From: Dan Brickley ([email protected])
Date: 06/24/01


Thanks, that's a handy summary. Mind if I pass this on to the relevant
W3C groups? (Semantic Web Coordination Group; RDF Core WG; RDF Interest
Group...).

Regarding RDF Schema, I intend to open up discussion of some RDFS issues
within the RDF Core WG shortly. Will keep you posted...

cheers,

Dan

On Sun, 24 Jun 2001, Peter F. Patel-Schneider wrote:

> As promised, here is my initial list of coordination points between RDF(S)
> and DAML+OIL.
> 
> peter
> 
> 
> 	Coordination between RDF(S) and DAML+OIL
> 
> - what does DAML+OIL depend on from RDF(S)
>   - RDF - basic triple model
>   - RDFS - basic RDFS classes - CLASS, RELATION, ...
> 	 - class organization - subclass, subproperty(?)
> 	 - structuring relationships - domain, range, ...
> 
> - what does DAML+OIL not use at all
>   - RDF - reification - not needed, not understood
> 	- containers - wrong properties for our purposes
>   - RDFS - meta-class organization - not needed
> 	 - ...
> 
> - what changes does DAML+OIL require
>   - RDFS - multiple domains - allow, with conjunctive reading
> 	 - multiple ranges - change from disjunctive to conjunctive reading
> 	 - subclass can be reflexive - 
> 
> - what areas are problematic
>        - fit in the middle
>        - have problems
>        - are missing from RDF(S)
>   - datatypes - currently in DAML+OIL
> 	      - should be in RDF(S)
>   - simple class organization - currently in RDFS
> 			      - should be ???
>   - reification - lots of problems
> 		- ...
>   - containers - need semantic justification
> 	       - perhaps move elsewhere ?
>   - domains and ranges - problem with multiple domains and ranges
>   - metaclasses and extensibility - ?
>   - no structure for information in RDF(S)
> 
> - other issues
>   - RDF and RDFS are not good layers
>     - both provide simple stuff, but both also provide suspect stuff
>       - RDF - triples / reification
>       - RDFS - frames / global ranges, but no local restrictions
>     - RDF gives meaning to all syntax
>       - makes it hard to define extensions
>   - what is a URI? - syntax and semantics
> 
> 


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