Hi, I'm working with a dynamic environment and have instances with some of their properties that get updated with time, such as the rank property below
<http://jena.apache.org/documentation/tdb/tdb_transactions.html> a <http://test.org/vocabulary/actions/Node> ; <http://test.org/vocabulary/actions/id> 92 ; <http://test.org/vocabulary/actions/rank> "2.181"^^<http://www.w3.org/2001/XMLSchema#double> , "1.672"^^<http://www.w3.org/2001/XMLSchema#double> , "0.233"^^< http://www.w3.org/2001/XMLSchema#double> , "0.466"^^< http://www.w3.org/2001/XMLSchema#double> , "0.274"^^< http://www.w3.org/2001/XMLSchema#double> , "0.543"^^< http://www.w3.org/2001/XMLSchema#double> , "0.86"^^< http://www.w3.org/2001/XMLSchema#double> , "1.234"^^< http://www.w3.org/2001/XMLSchema#double> . >From the excerpt it can be seen that multiple rank values are being added. I'm using sparql's combination of delete/insert to delete the current value and add the updated one, as follows: String pre = StrUtils.strjoinNL (" PREFIX : <http://test.org/vocabulary/actions/>" , "PREFIX text: <http://jena.apache.org/text#>" , "PREFIX rdfs: < http://www.w3.org/2000/01/rdf-schema#>" ,"PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>" ," PREFIX actions: < http://test.org/vocabulary/actions/>" ,"PREFIX rdf: < http://www.w3.org/1999/02/22-rdf-syntax-ns#>") ; String prop = StrUtils.strjoinNL( node, " actions:rank ?rank . "); dataset.begin(ReadWrite.WRITE) ; String dq = StrUtils.strjoinNL ( "DELETE { ", prop, " }", "INSERT {", data, "}", "WHERE { ", prop," }" ); try { UpdateRequest update = UpdateFactory.create(pre+"\n"+dq); GraphStore graphStore = GraphStoreFactory.create(dataset); UpdateAction.execute(update,graphStore); dataset.commit(); }catch(Exception ex){ ex.printStackTrace(); }finally { dataset.end() ; } any ideas as to why the values are not being deleted? thanks in advance.
