dotNetRDF-blazegraph

Blazegraph connector using dotNetRDF

License

GPLv2

Features Support Matrix

REST Endpoint	Call / parameters		dotNetRDF
QUERY	GET Request-URI ?query=...		+
	POST Request-URI ?query=...		+
	parameters	timestamp	+
		explain	-
		analytic	-
		default-graph-uri	-
		named-graph-uri	-
		format	-
		baseURI	-
		includeInferred	-
		timeout	-
		${var}=Value	-
	headers	X-BIGDATA-MAX-QUERY-MILLIS	+
INSERT
INSERT RDF (POST with Body)	POST Request-URI ... Content-Type: ... BODY		-
INSERT RDF (POST with URLs)	POST Request-URI ?uri=URI		-
DELETE
DELETE with Query	DELETE Request-URI ?query=...		-
DELETE with Body (using POST)	POST Request-URI ?delete ... Content-Type ... BODY		-
UPDATE
UPDATE (SPARQL 1.1 UPDATE)	POST Request-URI ?update=...		-
	parameters	using-graph-uri	-
		using-named-graph-uri	-
UPDATE (DELETE + INSERT) (DELETE statements selected by a QUERY plus INSERT statements from Request Body using PUT)	PUT Request-URI ?query=... ... Content-Type ... BODY		+
UPDATE (POST with Multi-Part Request Body)	POST Request-URI ?updatePost ... Content-Type: multipart/form-data; boundary=... ... form-data; name="remove" Content-Type: ... Content-Body ... form-data; name="add" Content-Type: ... Content-Body ... BODY		+
Multi-Tenancy API
DESCRIBE DATA SETS	GET /bigdata/namespace		-
CREATE DATA SET	POST /bigdata/namespace ... Content-Type ... BODY		-
DESTROY DATA SET	DELETE /bigdata/namespace/NAMESPACE		-
Transaction Management API
	POST /bigdata/tx => txId		+
COMMIT-TX	POST /bigdata/tx/txid?COMMIT		+
LIST-TX	GET /bigdata/tx		-
CREATE-TX	POST /bigdata/tx(?timestamp=TIMESTAMP)		+
STATUS-TX	POST /bigdata/tx/txId?STATUS		-
ABORT-TX	POST /bigdata/tx/txId?ABORT		+
PREPARE-TX	POST /bigdata/tx/txId?PREPARE		-
Access Path Operations
FAST RANGE COUNTS	GET Request-URI ?ESTCARD&([s|p|o|c]=(uri|literal))[&exact=(true|false)+		-
HASSTMT	GET Request-URI ?HASSTMT&([s|p|o|c]=(uri|literal))[&includeInferred=(true|false)+		-
GETSTMTS	GET Request-URI ?GETSTMTS ... Content-Type ...		-
	POST Request-URI ?GETSTMTS ... Content-Type …		-
DELETE with Access Path	DELETE Request-URI ?([s|p|o|c]=(uri|literal))+		only c param
STATUS	GET /status		-
CANCEL	POST /bigdata/sparql/?cancelQuery&queryId=....		-

Usage

Download dll’s from the link and add to the project or include them by the NuGet. Look at the https://bitbucket.org/dotnetrdf/dotnetrdf/wiki/User%20Guide dotNetRDF documentation.

Examples of using Blazegraph connector:

Create new graph

BlazegraphConnector connector = new BlazegraphConnector("http://localhost:9999/bigdata/");

Graph newGraph = new Graph(); newGraph.BaseUri = UriFactory.Create("http://example/bookStore");

Triple triple = new Triple( newGraph.CreateUriNode(UriFactory.Create("http://example/book1")), newGraph.CreateUriNode(UriFactory.Create("http://example.org/ns#price")), newGraph.CreateLiteralNode("42", new Uri(XmlSpecsHelper.XmlSchemaDataTypeInteger)) ); newGraph.Assert(triple);

connector.SaveGraph(newGraph);

Load graph

Graph loadGraph = new Graph(); connector.LoadGraph(loadGraph, UriFactory.Create("http://example/bookStore"));

Update graph

Triple triple2remove = new Triple( newGraph.CreateUriNode(UriFactory.Create("http://example/book1")), newGraph.CreateUriNode(UriFactory.Create("http://example.org/ns#price")), newGraph.CreateLiteralNode("42", new Uri(XmlSpecsHelper.XmlSchemaDataTypeInteger)) ); Triple triple2add = new Triple( newGraph.CreateUriNode(UriFactory.Create("http://example/book1")), newGraph.CreateUriNode(UriFactory.Create("http://purl.org/dc/elements/1.1/title")), newGraph.CreateLiteralNode("Fundamentals of Compiler Design", new Uri(XmlSpecsHelper.XmlSchemaDataTypeString)) ); connector.UpdateGraph( UriFactory.Create("http://example/bookStore"), new List() { triple2add }, new List() { triple2remove } );

Delete graph

connector.DeleteGraph(UriFactory.Create("http://example/bookStore"));

Query

SparqlResultSet resultSet = (SparqlResultSet)connector.Query("SELECT * { ?s ?p ?o }"); foreach (SparqlResult result in resultSet.Results) { Console.WriteLine(result.ToString()); }