- From: Seaborne, Andy <andy.seaborne@hp.com>
- Date: Wed, 5 May 2004 10:47:50 +0100
- To: public-rdf-dawg@w3.org
In the telecon, I took an action to reword requirement 3.1. = Proposed wording = ----------------------------------------------- 3.1 Multiple RDF triple matching The query langauge must include the capability to restrict matches on the RDF graph by providing more than one RDF triple pattern to be satisified in one query. ----------------------------------------------- by using the terminology of the recommendation "RDF Concepts" [3] particularly "RDF triple" and "RDF graph". We could flesh out "RDF triple pattern" now but it would have implications for syntactic sugar [4] of the eventual query language which I would rather leave open (e.g writing constraints on literals into the triple pattern or restrictions on namespaces of properties). = Background = I tried to chase down the origin of this item and found it recorded in minutes [1] as """ * queries with paths of length two or more edges """ The original email [2] says: """ the situation of users interested in more than just properties within one hop of a query node is very very common """ In the telecon, the feeling was that this could be better expressed in terms of multiple triple matches, which can be used to form a "path", or in terms of the RDF graph, not restricted to paths. Looking at the IRC log for 2004-04-01, the change to more than just paths was mentioned at the time. = Original Wording = For reference the original wording in v1.39 is: [[[ 3.1 Multi-edged Paths A query language must include the ability to match paths through an RDF graph where the number of arcs traversed is greater than one, as well as single one-edge paths. The query language may still only have paths of fixed length in the query or may cover paths of variable length (e.g. transitive closures). ]]] [1] http://lists.w3.org/Archives/Public/public-rdf-dawg/2004AprJun/0010.html [2] http://lists.w3.org/Archives/Public/public-rdf-dawg/2004JanMar/0184.html [3] http://www.w3.org/TR/rdf-concepts/ [4] http://wombat.doc.ic.ac.uk/foldoc/foldoc.cgi?syntactic+sugar
Received on Wednesday, 5 May 2004 05:51:41 UTC