如何编程查询owl

南京猿人

假设有一个owl,里面有一些statement,类似于数据库的记录.
查询的方法,首先是在owl编译器里面书写,测试SPARQL,类似于SQL.
然后,编程.

1. public static void addWMRestriction(OntClass newClass,
   
2. Individual newCuiInstance) {
   
3. try {
   
4. // newClass will be a kind of resource
   
5. String newCuiName = newCuiInstance.toString();
   
6. // http://www.phinformatics.org/Assets/Ontology/umls.owl#C0007932
   
7. String queryString = "PREFIX umls:"
   
8. + "PREFIX owl:"
   
9. + "SELECT ?subject"
   
10. + "WHERE {?subject owl:onProperty umls:correspondsTo."
    
11. + "?subject owl:hasValue <" + newCuiName + ">" + "}";
    
12. Query query = QueryFactory.create(queryString);
    
13. QueryExecution qe = QueryExecutionFactory.create(query, WM);
    
14. ResultSet rs4 = qe.execSelect();
    
15. // link sty in owl
    
16. if (rs4.hasNext() == false) {
    
17. System.out.println("Check restriction availability: false");
    
18. HasValueRestriction valRestriction = null;
    
19. valRestriction = WM.createHasValueRestriction(null,
    
20. UMLSModel.correspondsTo, newCuiInstance);
    
21. newClass.addProperty(RDFS.subClassOf, valRestriction);
    
22. }
    
23. } catch (Exception ex) {
    
24. String ErrorStr = "Exception of addWMRestriction: "
    
25. + ex.getMessage();
    
26. System.out.println(ErrorStr);
    
27. Min_ExceptionTable.insertToExceptionTable(ErrorStr);
    
28. }
    
29. 
    
30. }

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[ 本帖最后由 南京猿人 于 2008-1-3 03:28 编辑 ]

南京猿人

把测试过的SPARQL放入String,Execute query(String),得到一个resultset,然后处理resultset,和SQL一样。