Import experiments in Corese

1. Interoperability Working Days October 10th-11th, 2005 Import experiments in Corese Olivier Corby <olivier.corby@sophia.inria.fr> October 10th, 2005

2. Index • Execution of the benchmark suite • Comments on how Corese imports • Comments on the experimentation

3. Execution of the benchmark suite No modifications were needed in the tool for performing the experimentation. • Copy the benchmark in a local directory. • Load the files into Corese. • Export the content of each file back to RDF using a generic query : // Create a CoreseCorese corese =        new Corese("benchmark.properties", // which data to load                   "/user/path/data");     // path where to find data    String query =        "select group ?src  sort ?src  where " +        "source ?src (?x ?p ?y  ) " +        "filter ( ?src ~ 'graph'  && ?x != ?src )  ";      RDFResult res = corese.query(query);    CoreseGraph cg ;    for (Enumeration en = res.getValues(); en.hasMoreElements(); ) {      cg = (CoreseGraph) en.nextElement();      System.out.println(cg.toRDF());    }

4. Experimentation results

5. Experimentation results 2

6. Experimentation results 3

7. Experimentation results 4

8. Experimentation results 5

9. Experimentation results 6

10. Index • Execution of the benchmark suite • Comments on how Corese imports • Comments on the experimentation

11. Benchmarks that Corese doesn’t pass Cycles in class taxonomies Benchmarks: I11 Example: ... <Class rdf:about="http://nothing.org/graph11#class1"> <rdfs:subClassOf rdf:resource="http://nothing.org/graph11#class2"/> </Class> <Class rdf:about="http://nothing.org/graph11#class2"> <rdfs:subClassOf rdf:resource="http://nothing.org/graph11#class1"/> </Class> ... The semantics of cycles in class taxonomies are undefined in Corese.

12. Benchmarks that Corese doesn’t pass Cycles in property taxonomies Benchmarks: I24 Example: ... <rdf:Property rdf:about="http://nothing.org/graph21#property1"> <rdfs:subPropertyOf rdf:resource="http://nothing.org/graph21#property2"/> </rdf:Property> <rdf:Property rdf:about="http://nothing.org/graph21#property2"> <rdfs:subPropertyOf rdf:resource="http://nothing.org/graph21#property1"/> </rdf:Property> ... The semantics of cycles in property taxonomies are undefined in Corese.

13. Index • Execution of the benchmark suite • Comments on how Corese imports • Comments on the experimentation

14. Comments on modifications performed on the tool Some errors in Corese were fixed: • The RDF pretty printer printed the source of each document in answer to a generic query because the source is represented as a standard resource within the graph. The pretty printer has been corrected in order not to print the source unless required. • The RDF pretty printer did not print correctly the case : xxx rdf:type class1 class1 rdf:type class2 the second type statement was not printed, it has been corrected. • The RDF pretty printer did print an rdfs:label (if possible) even if not required by the query. Now, it does it only at user option.

15. Comments on the benchmark suites • There is no test for the specialization of the metamodel, e.g. : c:subRelation rdfs:subPropertyOf rdfs:subPropertyOf c:type c:subRelation rdf:type • There is no test for literals with language

16. Interoperability Working Days October 10th-11th, 2005 Import experiments in Corese Olivier Corby <olivier.corby@sophia.inria.fr> October 10th, 2005