On May 17, 2007, at 4:58 AM, Eric Jain wrote:
2. tools don't support reification well (just try writing a SPARQL query that queries statements about statements).
prefix dc: <http://purl.org/dc/elements/1.1/> prefix sc: <http://purl.org/science/owl/sciencecommons/> insert into graph <http://purl.org/commons/hcls/proto> { sc:s1 sc:p1 sc:o1. _:foo rdf:type rdf:Statement. _:foo rdf:subject sc:s1. _:foo rdf:predicate sc:p1. _:foo rdf:object sc:o1. _:foo dc:creator "Alan" } prefix dc: <http://purl.org/dc/elements/1.1/> prefix sc: <http://purl.org/science/owl/sciencecommons/> select ?s ?p ?o ?by from <http://purl.org/commons/hcls/proto> where { ?s ?p ?o. ?statement rdf:type rdf:Statement. ?statement rdf:subject ?s. ?statement rdf:predicate ?p. ?statement rdf:object ?o. ?statement dc:creator ?by }(results in attached picture - in case it doesn't show up in line in your email)
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