W3C home > Mailing lists > Public > w3c-rdfcore-wg@w3.org > December 2002

Re: What are literals?

From: pat hayes <phayes@ai.uwf.edu>
Date: Wed, 11 Dec 2002 12:43:54 -0600
Message-Id: <p05111b01ba1d376b6bb7@[10.0.100.86]>
To: "Patrick Stickler" <patrick.stickler@nokia.com>
Cc: w3c-rdfcore-wg@w3.org

>[Patrick Stickler, Nokia/Finland, (+358 40) 801 9690, 
>patrick.stickler@nokia.com]
>
>
>----- Original Message -----
>From: "ext pat hayes" <phayes@ai.uwf.edu>
>To: "Frank Manola" <fmanola@mitre.org>
>Cc: <w3c-rdfcore-wg@w3.org>
>Sent: 11 December, 2002 00:01
>Subject: Re: What are literals?
>
>
>>
>>  >Can someone remind me what we decided about whether literals were
>>  >resources or not?
>>
>>  Actually it kind of follows from the MT that simple literals must be
>>  resources, since
>>  1. they denote themselves, and
>>  2. anything that is denoted must be a resource.
>>
>>  Typed literals are another kettle of fish, of course.
>>
>>  >Specifically, I'm trying to revise a sentence in the Primer that says:
>>  >
>>  >"All classes are implicitly subclasses of class rdfs:Resource (since
>>  >the instances belonging to all classes are resources)"
>>  >
>>  >against which there is a question concerning rdfs:Literal.
>>
>>  There shouldnt be. Anything that can be in a class must be a resource.
>>
>>  Pat
>
>This seems to me to mean that the following holds
>
>    rdfs:Literal rdfs:subClassOf rdfs:Resource .
>
>which I guess I'm OK with, given the current definition of literals
>(typed or otherwise).
>
>Perhaps that should be explicitly stated in the semantics doc?

Well, all such subClassOfs and rdf:type's which refer to 
rdfs:Resource are omitted, since they are all vacuous. Everything has 
type resource and (hence) every class is a subclass of resource.

Pat



-- 
---------------------------------------------------------------------
IHMC					(850)434 8903   home
40 South Alcaniz St.			(850)202 4416   office
Pensacola              			(850)202 4440   fax
FL 32501           				(850)291 0667    cell
phayes@ai.uwf.edu	          http://www.coginst.uwf.edu/~phayes
s.pam@ai.uwf.edu   for spam
Received on Wednesday, 11 December 2002 13:44:00 EST

This archive was generated by hypermail pre-2.1.9 : Wednesday, 3 September 2003 09:54:51 EDT