- From: Alan Ruttenberg <alanruttenberg@gmail.com>
- Date: Sat, 11 Jun 2011 19:56:06 -0400
- To: David Booth <david@dbooth.org>
- Cc: Richard Cyganiak <richard@cyganiak.de>, Linked Data community <public-lod@w3.org>, Michael Hausenblas <michael.hausenblas@deri.org>
-Alan On Jun 11, 2011, at 5:57 PM, David Booth <david@dbooth.org> wrote: > On Sat, 2011-06-11 at 17:55 +0100, Richard Cyganiak wrote: > [ . . . ] >>> http://schema.org/Person is not the same as foaf:Person; one is a >>> class of documents, the other the class of people. >> >> I don't think that's correct at all. http://schema.org/Person is the >> class of people and is equivalent to foaf:Person. It's just that the >> schema.org designers don't seem to care much about the distinction >> between information resources and angels and pinheads. This is the >> prevalent attitude outside of this mailing list and we should come >> to terms with this. > > Furthermore, the kind of ambiguity that this creates is *inescapable* in > general, and we simply need to learn to deal with it. As long as an > application does not attempt to assert that foaf:Person is > owl:disjointWith the class of documents, there is no problem. It is > only a problem for those applications the *need* to distinguish between > foaf:Persons and document. Furthermore, there is a *cost* in making > finer distinctions than needed. For example, an ontology that models > the world as flat costs less to process and maintain than one that > models the world as round, even though it is obviously "wrong" in some > sense. But modeling the world as flat is *better* for an application > that is merely computing driving directions, because it is simpler, even > though it would be totally inadequate for an aircraft application. > > Resource ambiguity is not something that should be viewed as an > absolute. Rather, it is *relative* to a particular application: a URI > that is completely unambiguous to one application may be ambiguous to > another application that requires finer distinctions. David, as you know, it is trivial to distinguish in representation the difference between an information object and a person. I don't understand why you keep repeating this misinformation. -Alan > > For more explanation of this, see myth #3 in "Resource Identity and > Semantic Extensions: Making Sense of Ambiguity": > http://dbooth.org/2010/ambiguity/paper.html#myth3 > > And see Pat Hayes's favorite example of the definition of Mount Everest: > http://lists.w3.org/Archives/Public/semantic-web/2011Mar/0242.html > > While it is nicer to the community to avoid ambiguity that is *likely* > to cause problems to lots of applications, ultimately it is up to the > URI owner to decide what kinds of applications they want their URIs to > support. OTOH, if your application will be negatively affected, there > is nothing wrong with lobbying the URI owner to change their ways to > better support *your* application. At the same time, you should > recognize that *your* application is not *every* application. > > > -- > David Booth, Ph.D. > http://dbooth.org/ > > Opinions expressed herein are those of the author and do not necessarily > reflect those of his employer. > >
Received on Saturday, 11 June 2011 23:56:45 UTC