Comment on RDF Mapping: variables in sequence pattern

While verifying some WebOnt test cases against the RDF to structural
mapping defined at [1], I noticed that there is no constraint
preventing variables within the sequence pattern from matching the
same node (see the second row of Table 3 at [1]).  I found this
problematic, particularly when trying to avoid things like cyclic
lists (as in the nonconclusion ontology of [I5.5-006]).

I believe that adding the constraint to the mapping document will
clarify the expected behavior.

-- 
Mike Smith

Clark & Parsia
http://clarkparsia.com/

[1] http://www.w3.org/TR/2008/WD-owl2-mapping-to-rdf-20081202/#Mapping_from_RDF_Graphs_to_the_Structural_Specification
[I5.5-006] http://km.aifb.uni-karlsruhe.de/projects/owltests/index.php/TestCase:WebOnt-I5.5-006

Received on Tuesday, 6 January 2009 15:23:12 UTC