Storage-Virtuoso.md

Virtuoso

You can connect to an OpenLink Virtuoso server using the VirtuosoManager class.
Since this requires additional dependencies in the form of the Virtuoso ADO.Net provider this functionality is in the separate library dotNetRDF.Data.Virtuoso.dll

Supported Capabilities

• Load, Save, Delete, Update and List Graphs
• SPARQL Query and Update

Note that SPARQL Query and Update is subject to the peculiarities of the Virtuoso implementation which is well known for having various quirks and non-standard SPARQL extensions.

Creating a Connection

Assuming a standard Virtuoso installation you can connect like so:

VirtuosoManager virtuoso = new VirtuosoManager("localhost", VirtuosoManager.DefaultDB, "username", "password");

If you are running with a non-standard port then you can specify that like so:

VirtuosoManager virtuoso = new VirtuosoManager("localhost", 1234, VirtuosoManager.DefaultDB, "username", "password");

Note

The port you provide is that of the SQL interface not that of the HTTP server, in a default installation this is #1111# or the constant VirtuosoManager.DefaultPort

Advanced users may wish to configure the Virtuoso connection string manually in which case you can do this:

VirtuosoManager virtuoso = new VirtuosoManager("Connection String");

Using Virtuoso SPARQL Extensions

Our implementation does its best to cope with Virtuoso SPARQL extensions but this is not always perfect, if you run into trouble please ask for Support