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Re: LANG: Defn of DL in Mappings

From: Jim Hendler <hendler@cs.umd.edu>
Date: Tue, 31 Dec 2002 09:24:14 -0500
Message-Id: <p05200f28ba3758a76e47@[10.0.1.3]>
To: "Peter F. Patel-Schneider" <pfps@research.bell-labs.com>, jjc@hpl.hp.com
Cc: www-webont-wg@w3.org

>
>>  ====
>>
>>  Bother, 2(b) doesn't do as much as I wanted for solving the inability to use
>>  a bnode in two places problem, ... I think the abstarct syntax could benefit
>>  from the following change:
>>
>>  In many places (to be defined precisely which)
>>  replace
>>    <URI reference>
>>  with
>>    <OWL Name>
>>
>>  and add a rule
>>
>>  <OWL Name> ::= <URI Reference>
>>  <OWL Name> ::= <local identifier>
>>
>>  The latter play the same role in the abstract syntax as Blank node
>>  identifiers play in N-triples and RDF/XML. (Note there are no blank node
>>  identifiers in the RDF graph).
>
>This will not be done.
>
>>  This when combined with 2(b) allows near-arbitrary use of blank nodes while
>>  clearly remaining within the constraints of the abstract syntax.
>>
>>  Jeremy
>
>peter


Peter - is there a reason you say "this will not be done"?  I kind of 
like Jeremy's proposal - if it doesn't break OWL DL on some formal 
level, it seems like a good change - why don't you like it?


-- 
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)
Univ of Maryland, College Park, MD 20742	  240-731-3822 (Cell)
http://www.cs.umd.edu/users/hendler
Received on Tuesday, 31 December 2002 09:24:22 GMT

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