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-I5.5-006Received on Tuesday, 6 January 2009 15:23:12 GMT
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