- From: Yuzhong Qu <yzqu@seu.edu.cn>
- Date: Wed, 16 Apr 2003 08:33:44 +0800
- To: "Peter F. Patel-Schneider" <pfps@research.bell-labs.com>
- Cc: "webont-comments" <public-webont-comments@w3.org>
It's acceptable. Thanks! Yuzhong Qu ----- Original Message ----- From: "Peter F. Patel-Schneider" <pfps@research.bell-labs.com> To: <yzqu@seu.edu.cn> Cc: <public-webont-comments@w3.org> Sent: Tuesday, April 15, 2003 11:23 PM Subject: Re: Some comments on OWL S&AS > Again, thank you for your comments. In this message I propose some > editorial and tyopgraphical changes that I think might help to address > most of them. > > > 1. > > > > [2.1. Ontologies > > > > There are two built-in classes in OWL,.... > > The class with identifier owl:Thing is the class of all individuals, and > > is part of OWL Lite. The class with identifier owl:Nothing is the empty > > class. > > ... > > ] > > > > It should be explicitly specified whether or not owl:Nothing is included > > in OWL Lite. > > I have made the editorial change to add ``, and is part of OWL DL, but not > part of OWL Lite'' at the end of the above quote. > > > It would be nice and elegant to include owl:Nothing in OWL Lite if there > > is no harm to do so. > > It was a working group decision to not include owl:Nothing in OWL Lite, > even though an equivalent class can be defined in OWL Lite. Your comment, > however, will be considered by the working group. > > > 2. > > > > [2.3. Axioms > > ... > > However, **most information about properties** is more naturally > > expressed in restrictions, which allow local range and cardinality > > information to be specified. > > ... > > ] > > Restrictions are about to define new classes, not to specify > > properties. So the above sentence should be modified if possible. > > Information about properties is not exactly specifying those properties. I > do agree, however, that this sentence could be said better, so I've changed > it to read ``most information concerning how properties'' . It would also > be possible to write a much longer explanation of the difference here, but > I feel that that would not be helpful here. > > > 3. > > > > [2.3.1.2. OWL Lite Restrictions > > > > cardinality ::= 'minCardinality(0)' | 'minCardinality(1)' | > > | 'maxCardinality(0)' | 'maxCardinality(1)' | > > | 'cardinality(0)' | 'cardinality(1)' > > ] > > > > There are two reduantant symbols '|'. > > Thanks for noticing. I made the typographical change to eliminate them. > > > 4. About individual > > > > Just suggestion: > > The named individual and the anonymous individual should be explicitly > > separated. There are some essential differnce between facts about named > > individuals and the ones about anonymous individuals. > > I believe that the following explanatory text from Section 2.2 > > An individual can be given an individualID that will denote that > individual, and can be used to refer to that individual. However, > an individual need not be given an individualID; such individuals > are anonymous (blank in RDF terms) and cannot be directly referred > to elsewhere. The syntax here is set up to somewhat mirror RDF/XML > syntax RDF Syntax without the use of rdf:nodeID. > > adequately makes the distinction between named and anonymous individuals. > I also believe that there does not need to be separate productions for > them, particularly as the productions are very similar. > > > Yuzhong Qu > > Dept.Computer Science and Engineering > > Southest University, Nanjing, China > > http://cse.seu.edu.cn/People/yzqu/en > > Please reply to the mailing list as to whether the above changes adequately > address your comments (except for whether owl:Nothing is in OWL Lite, which > will be separately addressed). > > Again, thank you. > > Peter F. Patel-Schneider > Bell Labs Research > Lucent Technologies > > >
Received on Tuesday, 15 April 2003 20:34:16 UTC