- From: Steve Harris <steve.harris@garlik.com>
- Date: Wed, 17 Feb 2010 09:54:24 +0000
- To: SPARQL Working Group WG <public-rdf-dawg@w3.org>
On 17 Feb 2010, at 05:33, Paul Gearon wrote: > On Tue, Feb 16, 2010 at 11:15 PM, Gregory Williams > <greg@evilfunhouse.com> wrote: >> On Feb 16, 2010, at 12:28 PM, Steve Harris wrote: >> >>> On 16 Feb 2010, at 17:23, Lee Feigenbaum wrote: >>> >>>> I'd be surprised if anyone disagrees that this is useful. >>>> >>>> However, I have no idea how we would specify it in the service >>>> description document. How would we define a property/class that >>>> describes something that is not itself defined anywhere? The only >>>> way I see to do it is to define what a property function is, and >>>> that's beyond our scope. >>> >>> Right, this is my feeling too. >> >> Can I take this to mean that my suggested wording isn't acceptable? >> I'm not sure we need to define exactly what happens when a property >> function does its thing so long as we indicate that it's up to the >> implementation, but others may think differently. > > I was happy with it, but apparently something is missing. > > I think it's clear that we can't (or shouldn't try to) define what a > property function is. I just want to see the particular predicates > listed. That's trivial to do, and it's all that I want. Perhaps I'm missing something, but looking at it from a triply point of view, you have something like: :propertyFunction rdfs:range :PropertyFunction . <endpoint> :propertyFunction <func> . But, you can't define what a :PropertyFunction is, as it's not a standardised thing, so two people reusing the same <func> URI is at best unwise, and in the worse case dangerously misleading, and the implied typing is meaningless. So, I don't see what this achieves, or how we could justify including it in a rec. However, we're using RDF for our descriptions, so nothing stops a group of implementers agreeing on what a "Property Function" is outside this group, and adding some properties and classes to an appropriate schema. - Steve -- Steve Harris, Garlik Limited 2 Sheen Road, Richmond, TW9 1AE, UK +44 20 8973 2465 http://www.garlik.com/ Registered in England and Wales 535 7233 VAT # 849 0517 11 Registered office: Thames House, Portsmouth Road, Esher, Surrey, KT10 9AD
Received on Wednesday, 17 February 2010 09:54:54 UTC