sparql - Delete RDF tuple using dotNetRDF -

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• sparql delete query dotnetrdf not modify rdf file 2 answers

i'd delete rdf tuple using dotnetrdf. here rdf file:

<rdf:rdf xml:base="http://www.example.org/destdetails#"           xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"           xmlns:xsd="http://www.w3.org/2001/xmlschema#"           xmlns:ns0="http://www.example.org/destdetails#"           xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">   <rdf:description rdf:about="&ns0;0165a659-54ea-4e80-bee7-9d3951d47ae3">     <ns0:id>0165a659-54ea-4e80-bee7-9d3951d47ae3</ns0:id>     <ns0:destination rdf:resource="&ns0;veles" />     <ns0:distrname>test test</ns0:distrname>     <ns0:hastimestart>17:00</ns0:hastimestart>     <ns0:hastimestop>17:55</ns0:hastimestop>     <ns0:moneyonedir>130 den.</ns0:moneyonedir>     <ns0:moneytwodir>---</ns0:moneytwodir>   </rdf:description> </rdf:rdf> 

here code using:

        triplestore magacintorki = new triplestore();         //kreiranje na graf         graph rdf = new graph();         // create dataset , use named graph default graph         fileloader.load(rdf, rdfdatoteka, new rdfxmlparser());         rdf.baseuri = new uri("http://www.example.org/destdetails"); // remove name graph         // if graph has no name added default graph         magacintorki.add(rdf);         sparqlupdateparser parser = new sparqlupdateparser();         sparqlparameterizedstring cmdstring = new sparqlparameterizedstring();          cmdstring.commandtext = @"prefix  ns0: <http://www.example.org/destdetails#>"             + " prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>"             + " delete "             + "  {"             + " graph @graph {  ?dest ?p ?o"             + " ?dest ns0:nodeid @destid} }";          cmdstring.seturi("graph",rdf.baseuri);         cmdstring.setliteral("destid",destid);         sparqlupdatecommandset cmds = parser.parsefromstring(cmdstring);         leviathanupdateprocessor processor = new leviathanupdateprocessor(magacintorki);         processor.processcommandset(cmds);         rdf.savetofile(rdfdatoteka); 

however nothing happening rdf file.

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this code works fine me, because not asked delete triples using sparql

        graph rdf = new graph();         // create dataset , use named graph default graph         fileloader.load(rdf, rdfdatoteka, new rdfxmlparser());         rdf.baseuri = new uri("http://www.example.org/destdetails");         inode n = rdf.geturinode(new uri("http://www.example.org/destdetails#" + destid));         if (n != null)         {             rdf.retract(rdf.gettripleswithsubject(n));         }         rdf.savetofile(rdfdatoteka); 

where destid subject of triples.

your query not match data why delete has no effect.

in data have ns0:id in delete try match against ns0:nodeid - therefore no data matched , nothing deleted.