OpenLink Virtuoso
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.
| Tags | Database Database Engines/Servers API Front-Ends Internet Web |
|---|---|
| Operating Systems | POSIX Unix |
| Implementation | C Other Scripting Engines |
Recent releases
- 24 Apr 2009 16:52
Changes: This release introduces a new development branch with ANY ORDER queries, Anytime queries, client-level resource accounting, expressions in "IN" predicate, a Facet Browsing Engine, Inverse Functional Property Value enhanced Identity, key compression, and transitive sub-queries in both SQL and SPARQL.
- 22 Apr 2009 18:50
Changes: This release adds FOAF+SSL support, additional x509 certificate management, support for HTTP and SOCKS proxies, SPARQL extensions for graph-level security, new Ubiquity commands and many new Sponger Cartridges, improvements to session and stream handling and enhanced N3 syntax support and TTL output speed, and fixes for free-text optimization and i18N issues, the handling of checkpoint/rollback, and the compile/build process.
- 17 Feb 2009 15:51
Changes: This release includes initial JDBC 4.x support, rate-limiting HTTP ACLs, INI-file options for a lite/embeddable mode, new sponger cartridges, FOAF+SSL support, new CURIE-generation functions, greater integration with Amazon S3 storage, a programmatic interface to data-spaces via Ubiquity, performance optimizations, and bugfixes.
- 06 Nov 2008 15:23
Changes: This version brings performance optimizations for the SQL and SPARQL engines and ODBC and JDBC drivers. New features include: an Excel MIME-type output option in the SPARQL endpoint; triple options bif:contains and transitivity; new RDF-generating cartridges with UMBEL lookups for the Sponger; support for very large HTTP client requests; a sparql-auth endpoint with digest authentication; and support for the Ubiquity Firefox plugin. There are also minor bugfixes for memory leaks, SPARQL "select distinct", and various SQL query syntax handling. XHTML validation is done in the ODS application suite.
- 28 Aug 2008 16:58
Changes: This version focuses on speed improvements. There are self-join optimizations in the JDBC Driver. SPARQL engine and SPARQL-BI extension optimizations are incorporated. Supported serialization formats now include TriG alongside RDFa, N3, Turtle, and RDF/XML. There are new Sponger Cartridges for Digg, FriendFeed, and CrunchBase, and existing Cartridges are improved. Handling of the SPARQL 'OPTIONAL' keyword has been improved. There is a more flexible Mapping service model using the new OAT-based Mapping Control (with a province locator). Minor fixes include Gem URLs for Atom, RSS, and RDF feeds.
