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reverse directions in property paths

From: David Mizell <dmizell@cray.com>
Date: Fri, 16 Sep 2011 20:43:34 -0500
To: "public-rdf-dawg-comments@w3.org" <public-rdf-dawg-comments@w3.org>
Message-ID: <B3A9F7995EB3CC4686DD7F46FF2688BD089B49EE82@CFEXMBX.americas.cray.com>
Hi -

I'm starting to look at property paths in SPARQL 1.1, and the spec doesn't make it clear how/whether reversal "distributes" over other operators. Suppose you have the triples

y  a  o1
o1 b  x

y  b  o2
o2  a  x

in the database. Would {  x   ^(a/b)   y  } match with the first pair, or with the second pair of triples in the database?

David Mizell
Cray Inc., Seattle
Received on Sunday, 18 September 2011 22:09:43 UTC

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