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README.md

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()); }

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dotnetrdf client for Blazegraph

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