FederatedSparqlRemoteEndpoint Class

A Class for connecting to multiple remote SPARQL Endpoints and federating queries over them with the data merging done locally.

Inheritance Hierarchy

SystemObject
  VDS.RDFBaseEndpoint
    VDS.RDF.QuerySparqlRemoteEndpoint
      VDS.RDF.QueryFederatedSparqlRemoteEndpoint

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

Syntax

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public class FederatedSparqlRemoteEndpoint : SparqlRemoteEndpoint

Public Class FederatedSparqlRemoteEndpoint
	Inherits SparqlRemoteEndpoint

The FederatedSparqlRemoteEndpoint type exposes the following members.

Constructors

	Name	Description
	FederatedSparqlRemoteEndpoint(IEnumerableUri)	Creates a new Federated SPARQL Endpoint by creating a SparqlRemoteEndpoint for each of the given URI.
	FederatedSparqlRemoteEndpoint(Uri)	Creates a new Federated SPARQL Endpoint by creating a new SparqlRemoteEndpoint for the given URI.
	FederatedSparqlRemoteEndpoint(IEnumerableSparqlRemoteEndpoint)	Creates a new Federated SPARQL Endpoint using the given Endpoints.
	FederatedSparqlRemoteEndpoint(SparqlRemoteEndpoint)	Creates a new Federated SPARQL Endpoint using a given Endpoint.

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Properties

	Name	Description
	Credentials	Gets/Sets the HTTP authentication credentials to be used. (Inherited from BaseEndpoint.)
	DefaultGraphs	Gets the Default Graph URIs for Queries made to the SPARQL Endpoint. (Inherited from SparqlRemoteEndpoint.)
	HttpMode	Gets/Sets the HTTP Mode used for requests. (Inherited from BaseEndpoint.)
	IgnoreFailedRequests	Gets/Sets whether a failed request on one endpoint should cause the entire request to fail.
	MaxSimultaneousRequests	Gets/Sets the maximum number of endpoints this endpoint will issue queries to at any one time.
	NamedGraphs	Gets the List of Named Graphs used in requests. (Inherited from SparqlRemoteEndpoint.)
	Proxy	Gets/Sets a Proxy Server to be used. (Inherited from BaseEndpoint.)
	ProxyCredentials	Gets/Sets Credentials to be used for Proxy Server. (Inherited from BaseEndpoint.)
	RdfAcceptHeader	Gets/Sets the Accept Header sent with CONSTRUCT/DESCRIBE queries. (Inherited from SparqlRemoteEndpoint.)
	ResultsAcceptHeader	Gets/Sets the Accept Header sent with ASK/SELECT queries. (Inherited from SparqlRemoteEndpoint.)
	Timeout	Gets/Sets the HTTP Timeouts used specified in milliseconds. (Inherited from BaseEndpoint.)
	Uri	Gets the Endpoints URI. (Inherited from BaseEndpoint.)
	UseCredentialsForProxy	Controls whether the Credentials set with the SetCredentials() method or the Credentialsare also used for a Proxy (if used). (Inherited from BaseEndpoint.)
	UserAgent	Gets/Sets the user agent string to pass in the request header. (Inherited from BaseEndpoint.)

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Methods

	Name	Description
	AddEndpoint(Uri)	Adds an additional endpoint to be used by this endpoint.
	AddEndpoint(SparqlRemoteEndpoint)	Adds a additional endpoint to be used by this endpoint.
	ApplyCustomRequestOptions	Method which may be overridden in derived classes to add any additional custom request options/headers to the request. (Inherited from BaseEndpoint.)
	ApplyRequestOptions	Applies generic request options (timeout, authorization and proxy server) to a request. (Inherited from BaseEndpoint.)
	ClearCredentials	Clears any in-use credentials so subsequent requests will not use HTTP authentication. (Inherited from BaseEndpoint.)
	ClearProxy	Clears any in-use credentials so subsequent requests will not use a proxy server. (Inherited from BaseEndpoint.)
	ClearProxyCredentials	Clears the in-use proxy credentials so subsequent requests still use the proxy server but without credentials. (Inherited from BaseEndpoint.)
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
	GetHashCode	Serves as the default hash function. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	QueryRaw(String)	Makes a Query to a Sparql Endpoint and returns the raw Response. (Overrides SparqlRemoteEndpointQueryRaw(String).)
	QueryRaw(String, String)	Makes a Query to a Sparql Endpoint and returns the raw Response. (Overrides SparqlRemoteEndpointQueryRaw(String, String).)
	QueryWithResultGraph(String)	Makes a Query where the expected Result is an RDF Graph ie. CONSTRUCT and DESCRIBE Queries. (Overrides SparqlRemoteEndpointQueryWithResultGraph(String).)
	QueryWithResultGraph(IRdfHandler, String)	Makes a Query where the expected result is a Graph i.e. a CONSTRUCT or DESCRIBE query. (Overrides SparqlRemoteEndpointQueryWithResultGraph(IRdfHandler, String).)
	QueryWithResultGraph(String, GraphCallback, Object)	Makes a Query asynchronously where the expected Result is an RDF Graph ie. CONSTRUCT and DESCRIBE Queries. (Inherited from SparqlRemoteEndpoint.)
	QueryWithResultGraph(IRdfHandler, String, QueryCallback, Object)	Makes a Query asynchronously where the expected Result is an RDF Graph ie. CONSTRUCT and DESCRIBE Queries. (Inherited from SparqlRemoteEndpoint.)
	QueryWithResultSet(String)	Makes a Query where the expected Result is a SparqlResultSet ie. SELECT and ASK Queries. (Overrides SparqlRemoteEndpointQueryWithResultSet(String).)
	QueryWithResultSet(ISparqlResultsHandler, String)	Makes a Query where the expected Result is a SparqlResultSet ie. SELECT and ASK Queries. (Overrides SparqlRemoteEndpointQueryWithResultSet(ISparqlResultsHandler, String).)
	QueryWithResultSet(String, SparqlResultsCallback, Object)	Makes a Query asynchronously where the expected Result is a SparqlResultSet i.e. SELECT and ASK Queries. (Inherited from SparqlRemoteEndpoint.)
	QueryWithResultSet(ISparqlResultsHandler, String, QueryCallback, Object)	Makes a Query asynchronously where the expected Result is a SparqlResultSet i.e. SELECT and ASK Queries. (Inherited from SparqlRemoteEndpoint.)
	RemoveEndpoint(Uri)	Removes all endpoints with the given URI from this endpoint.
	RemoveEndpoint(SparqlRemoteEndpoint)	Removes a given endpoint from this endpoint.
	SerializeConfiguration	Serializes the Endpoint's Configuration. (Overrides SparqlRemoteEndpointSerializeConfiguration(ConfigurationSerializationContext).)
	SetCredentials(String, String)	Sets the HTTP Digest authentication credentials to be used. (Inherited from BaseEndpoint.)
	SetCredentials(String, String, String)	Sets the HTTP Digest authentication credentials to be used. (Inherited from BaseEndpoint.)
	SetProxy(String)	Sets a Proxy Server to be used. (Inherited from BaseEndpoint.)
	SetProxy(Uri)	Sets a Proxy Server to be used. (Inherited from BaseEndpoint.)
	SetProxyCredentials(String, String)	Sets Credentials to be used for Proxy Server. (Inherited from BaseEndpoint.)
	SetProxyCredentials(String, String, String)	Sets Credentials to be used for Proxy Server. (Inherited from BaseEndpoint.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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Remarks

Queries are federated by executing multiple requesting simultaneously and asynchronously against the endpoints in question with the data then merged locally. The merging process does not attempt to remove duplicate data it just naively merges the data.

Reference

VDS.RDF.Query Namespace