- From: Jan Grant <Jan.Grant@bristol.ac.uk>
- Date: Mon, 8 Oct 2001 16:31:03 +0100 (BST)
- To: Pat Hayes <phayes@ai.uwf.edu>
- cc: w3c-rdfcore-wg <w3c-rdfcore-wg@w3.org>
On Fri, 5 Oct 2001, Pat Hayes wrote: > >I've been thinking along very similar lines. See > >http://ioctl.org/rdf/literals > >which has a mix of related ideas, some good, some bad, some wrong. > > Let me pick up on one of them and chew on it: the idea that a literal > is a self-denoting entity. This is a very appealing idea, and it > works for strings, but I don't think it can be made to work (without > modification) for any other kinds of literal. In particular, one of > your examples is 'the number 12'. But numbers are denoted by > numerals, not numbers; numerals, not numbers, are the syntactic > labels that we use to label graph nodes. So I take it that the > intention in treating '12' as a "literal number" is in fact that the > *numeral* '12' is the literal, and that its interpretation is fixed > to be the number 12 (that is, the number whose prime factors are 2,2 > and 3; the square root of 144; denoted variously by the numerals '12' > in decimal, '1100' in binary, and '14' in octal). But in none of > these cases is the numerical literal *identical* to its > interpretation. Actually, I had a stronger notion, which was that conceptually, the number (not a numeral representation) should be the "label" in a graph. (Forgive an argument by analogy, but We accept concepts like "the set { 1, 2, 3 }" which is conceptually a set of numbers, not numerals) So it really _is_ the number 1 labelling a node in the graph. However, any concrete realisation of such an RDF graph must, of course, use a representation (be it numeral or otherwise); this is true whether it's an "RDF database" or an "RDF/XML serialisation". If it makes any sense, I'd like to separate the two notions. Anyroadup, jan -- jan grant, ILRT, University of Bristol. http://www.ilrt.bris.ac.uk/ Tel +44(0)117 9287088 Fax +44 (0)117 9287112 RFC822 jan.grant@bris.ac.uk Talk is cheap: free, as in beer. As in Real Ale, not that Budweiser rubbish.
Received on Monday, 8 October 2001 11:33:59 UTC