OpenLink Virtuoso is a scalable, high-performance SQL-200n compliant object-relational database engine. It provide sophisticated database management for SQL, XML, and RDF. All interaction with Virtuoso occurs via its support of industry standard query languages, protocols, APIs, and data formats such as: ODBC, JDBC, OLE-DB, ADO.NET, XMLA, SQL, SPARQL, XQuery, SOAP, HTTP, WebDAV, SyncML, Atom (Publishing and Syndication), RSS, RDF, and more. License: GNU General Public License (GPL) Changes:
This release includes the addition of LUBM benchmarks for RDF data managers to the test suite, a check for backup/restore status, and optimizations to bitmap indexes. In the RDF/SPARQL field, there is support for xsl:float, new Sponger cartridges for SVG, XBRL, and HR-XML documents, URL rewrite rules for XBRL, and optimizations to the SPARQL engine. The ODS Applications Suite has new support for Meaning of a Tag (MOAT), support for OpenID 2.0 and OAuth, additional ODS-generated de-referencable URIs, an enhanced Wiki search facility, and improvements to ODS Calendar.

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