- From: Steve Harris <steve.harris@garlik.com>
- Date: Wed, 25 Jul 2012 17:07:43 +0100
- To: Aidan Hogan <aidan.hogan@deri.org>
- Cc: semantic-web@w3.org
Perhaps, but the distinction between a label for a property, that's unique to that edge, and the name of an edge is rather a subtle one. If he was thinking of edge as in the combination of two nodes, and an edge label, then I would have though "triple" would be a better word, and there are numerous well-known solutions to that question. - Steve On 2012-07-25, at 16:47, Aidan Hogan wrote: > Steve, > > If I understand Melvin's point, in RDF, edge:123456 is the URI of a property used to label the edge, not the edge itself. > > Analogously, you don't identify a class-instance by it's class URI. > > An edge is between two things. It might be directed and it might be labelled. In RDF it's both. > > Hence, the edge would encapsulate the full triple, including source (subject) and target (object) nodes, as well as the label (predicate). > > Cheers, > Aidan > > On 25/07/2012 16:18, Steve Harris wrote: >> Nothing stops you from giving edges a unique URI, infact I think I've >> worked on systems that did that. >> >> e.g. >> >> <foo> <http://example.com/edge/123456> 1 . >> <http://example.com/edge/123456> a rdf:Property . >> ... >> >> - Steve >> >> On 2012-07-25, at 16:07, Melvin Carvalho wrote: >> >>> Sorry if this topic has been covered before, but I have a question >>> based on the axioms of the web, in particular: >>> >>> *Axiom 0a: Universality 2 Any resource of significance should be >>> given a URI. >>> * >>> In this case we consider the web to be a directed graph (of nodes and >>> edges), where a *node* corresponds to a *resource* but edge does not. >>> >>> We are encouraged to make nodes universal by giving them a URI. >>> >>> Why dont edges get the same treatment, ie encouragment to give it a >>> (universal) name. Is it even practical? >>> >>> I know there's such thing as reification but that seems to be >>> unpopular (maybe before my time). >>> >>> I'm just curious as to whether this seems asymmetrical, that nodes are >>> seemigly treated in one way, and edges in another? >> >> -- >> Steve Harris, CTO >> Garlik, a part of Experian >> +44 7854 417 874 http://www.garlik.com/ >> Registered in England and Wales 653331 VAT # 887 1335 93 >> Registered office: Landmark House, Experian Way, Nottingham, Notts, NG80 1ZZ >> > > -- Steve Harris, CTO Garlik, a part of Experian +44 7854 417 874 http://www.garlik.com/ Registered in England and Wales 653331 VAT # 887 1335 93 Registered office: Landmark House, Experian Way, Nottingham, Notts, NG80 1ZZ
Received on Wednesday, 25 July 2012 16:08:17 UTC