This query page is designed to help you test OpenLink Virtuoso SPARQL protocol endpoint.
Consult the Virtuoso Wiki page describing the service or the Online Virtuoso Documentation section RDF Database and SPARQL.
There is also a rich Web based user interface with sample queries. You can access it at: /isparql.
Virtuoso is a scalable cross-platform server that combines Relational, Graph, and Document Data Management with Web Application Server and Web Services Platform functionality.
The Virtuoso SPARQL query service implements the SPARQL Protocol for RDF (W3C Working Draft 25 January 2006) providing SPARQL query-processing for RDF data available on the open internet.
The query service implementation extends the standard protocol by providing multiple output-formats alongside the standard XML results serialization. At present this uses additional query parameters, although content-negotiation will be supported soon.
Virtuoso is an innovative enterprise grade multi-model data server for agile enterprises & individuals. It delivers an unrivaled platform agnostic solution for data management, access, and integration.
you can find documentation on our Universal Data Access (UDA) driver suite for ODBC, JDBC, OleDB and ADO.NET; for the Virtuoso SQL and RDF database; for the OpenLink Dataspace Application Suite; and for the OpenLink AJAX Toolkit (OAT).