- From: Steve Harris <steve.harris@garlik.com>
- Date: Fri, 15 Jan 2010 22:06:43 +0000
- To: Danny Ayers <danny.ayers@gmail.com>
- Cc: jeremy@topquadrant.com, tai@g5n.co.uk, "semantic-web@w3.org" <semantic-web@w3.org>
On 15 Jan 2010, at 10:57, Danny Ayers wrote: > Jeremy, Toby, anyone, > > > Aside from a little tidiness, what would we actually gain through > going the whole hog on what can go in which position in the triple? > > blank node predicate - what does that tell you that an rdfs:seeAlso > wouldn't? > > literal subject - aside from quotations: > > "I can't really see how it would be useful" <x:saidBy> <#me> . :) There is a cost to opening up what can go where in triples. My SPARQL engines (and I expect those of others) use this as a source of optimisations. E.g. if some variable appears in the predicate slot, then you know it can only bind to a URI, and you can limit your search space. Not that it's necessarily a bad idea, just that it's not a free lunch. - 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 Friday, 15 January 2010 22:12:13 UTC