- From: Seaborne, Andy <andy.seaborne@hp.com>
- Date: Mon, 11 Apr 2005 11:54:49 +0100
- To: Dan Connolly <connolly@w3.org>
- CC: RDF Data Access Working Group <public-rdf-dawg@w3.org>
This feature can be done but it may have consequences: Example: Turtle: triples ::= subject ws+ predicateObjectList predicateObjectList ::= verb ws+ objectList ( ws* ';' ws* verb ws+ objectList )* (ws* ';')? so: :x :p :v ; :q :w :z . is legal as triples :x :p :v . :q :w :z . because a triple can be "x y z ;" To help establish a baseline, could you let me know what's the official, definitive grammar for N3? Is it the N3 version or one of the Python parsers? Hmm - there are whitespace differences as well. e.g. <a><b><c> is legal N3 (according to cwm) but not Turtle because there is no WS after the subject and no trailing dot for the triple. What would be most useful is a principle for resolving these rather than a case by case basis. Andy Dan Connolly wrote: > sparqler (http://sparql.org/query.html )seems to like > > SELECT ?who WHERE > { > [ rdf:subject ?work; > rdf:predicate sam:isAbout; > rdf:object ?topic > ] dc:creator ?who > } > > but not with a trailing semi > > SELECT ?who WHERE > { > [ rdf:subject ?work; > rdf:predicate sam:isAbout; > rdf:object ?topic; > ] dc:creator ?who > } > > When working on an N3 grammar, I was stumped for a while > trying to allow this. I think I eventually made a separate > token for "; followed by ]" as distinct from ;. > > I haven't checked the SPARQL grammar yet, but I think > this should be allowed. >
Received on Monday, 11 April 2005 10:55:01 UTC