FederatedSparqlRemoteEndpointQueryWithResultGraph Method (String)

Makes a Query where the expected Result is an RDF Graph ie. CONSTRUCT and DESCRIBE Queries.

Namespace: VDS.RDF.Query
Assembly: dotNetRDF (in dotNetRDF.dll) Version:

Syntax

public override IGraph QueryWithResultGraph(
	string sparqlQuery
)

Public Overrides Function QueryWithResultGraph ( 
	sparqlQuery As String
) As IGraph

Parameters

sparqlQuery: Type: SystemString
SPARQL Query String.

Return Value

Type: IGraph
RDF Graph.

Exceptions

Exception	Condition
RdfQueryException	Thrown if any of the requests to the endpoints fail.
RdfQueryTimeoutException	Thrown if not all the requests complete within the set timeout.

Remarks

The query is executed by sending it federating it to all the endpoints this endpoint contains using simultaneous asychronous calls. Once these calls complete the results are naivley merged together (no duplicate data removal) and returned as a single result.

By default if any of the endpoints used return an error then the entire query will fail and an exception will be thrown, this behaviour can be overridden by setting the IgnoreFailedRequests property to be true in which case the result will be the merge of the results from all endpoints which successfully provided a result.

Reference

FederatedSparqlRemoteEndpoint Class

QueryWithResultGraph Overload

VDS.RDF.Query Namespace

FederatedSparqlRemoteEndpointAddLanguageSpecificTextSet("LSTDFB316CC_0?cpp=::|nu=.");QueryWithResultGraph Method (String)

Parameters

Return Value

Reference

FederatedSparqlRemoteEndpointQueryWithResultGraph Method (String)