c# - Whats wrong with this SPARQL query? - 


string sparql = "";             sparql+= "prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>\n";             sparql+= "prefix i: <http://evolizer.org/ontologies/seon/2010/09/softwaremetrics.owl#>\n";             sparql+= "prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>\n";             sparql+="select ?metric ?value\n";             sparql+="where {\n";             sparql+="?metric rdf:type i:softwaredesignmetric .\n";             sparql+="?metric i:hasname mccabe .\n";             sparql+= "?metric i:hasvalue ?value \n";             sparql+="}\n";

by executing exception:

a first chance exception of type 'system.net.webexception' occurred in system.dll exception when sending query:  prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> prefix i: <http://evolizer.org/ontologies/seon/2010/09/softwaremetrics.owl#> prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> select ?metric ?value { ?metric rdf:type i:softwaredesignmetric . ?metric i:hasname mccabe . ?metric i:hasvalue ?value  }

the problem has query itself, because other queries same server working.

all of examples here place string arguments (such mccabe in example) in quotes. it?


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