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Virtuoso Open Source Edition News (2009)

Later Years


2009-10-20: Announcing Virtuoso Open-Source Edition v6.0.0

OpenLink Software is pleased to announce the official release of Virtuoso Open-Source Edition, Version 6.0.0:

***IMPORTANT NOTE*** The database format changed substantially between VOS 5.x and VOS 6.x. To upgrade your database, you must dump all your data from your VOS 5.0 database and re-load it into VOS 6.0.

New product features include:

  • Faceted Data Exploration Engine & Web Services (REST or SOAP) for high-performance disambiguated entity search & find, across entity type and property dimensions
  • ANY ORDER Queries
  • Anytime Queries (basic and complex business intelligence style analytics queries)
  • Client-level resource accounting
  • Expressions in "IN" predicate
  • Inverse Functional Property Value enhanced Identity
  • Key compression
  • Transitive subqueries in SQL, SPARQL, and SPASQL (ODBC, JDBC, ADO.NET, OLEDB, XMLA)
  • Enhanced Sponger Middleware Layer
  • DBMS hosted Public Key Infrastructure for WebID Protocol based Federated Identity.

2009-10-19: Announcing Virtuoso Open-Source Edition v5.0.12

OpenLink Software is pleased to announce a new release of Virtuoso, Open-Source Edition, version 5.0.12

This version includes:

Database engine

  • Added Public Key Infrastructure UI in conductor
  • Added failover/roundrobin support for all client layers
  • Added support for vectors in IN predicate
  • Added various small engine optimizations and enhancements
  • Refactored JDBC driver
  • Imported PCRE version 7.9 from upstream project
  • Fixed XA support
  • Fixed performance of sprintf_more when using large buffers
  • Fixed memory leaks
  • Fixed HTTP various issues with HEAD and POST
  • Fixed serialization on HTTP connection cache
  • Fixed allow client to run during online backup
  • Fixed small bugs and compiler warnings


  • Added SPARQL graph-level security
  • Added new RDFa parser
  • Added support for Concise Bound Description
  • Added optimization for bif:COUNT
  • Added optimization for OPTIONAL
  • Added support for SCORE_LIMIT in bif:contains
  • Added support for text/n3 mime type
  • Added support for NVARCHAR, BIGINT in SPARQL and RDFViews
  • Added support for exclude-result-prefixes
  • Added support to crawl with multiple threads
  • Added support for NQUAD, JSON and N-Triples
  • Added support for DSA certificates
  • Added MS Docs, Open Office, Google app cartridges
  • Added CNET, YELP, TESCO, ZILLOW cartridges
  • Added GoodRelations, GeoNames, BestBuy cartridges
  • Added Alchemy, Yahoo Boss, Picasa, haudio cartridges
  • Added cache for common ontologies
  • Improved support for rdf:XMLLiteral exp in RDF loaders
  • Fixed handling of special characters in IRI
  • Fixed RDF view generation
  • Fixed and enhanced description.vsp
  • Fixed and enhanced iSPARQL
  • Fixed charset handling for cartridges

ODS Applications

  • Added checks for dynamic local
  • Added expiration so sponger can track changes
  • Added support for conversations
  • Added 'GROUP BY' handling for listed messages
  • Added 'Related' section in posts
  • Added new API and Ubiquity commands
  • Added hCard microformat
  • Added Ontology based editing
  • Added OpenSearch support
  • Added support for Smart Folders
  • Fixed OpenID, WebID Protocol
  • Fixed wiki attachments "upstreaming"
  • Fixed RDF gems
  • Fixed UI profile
  • Fixed mail filters
  • Fixed atom-pub protocol
  • Fixed rewrite rules
  • Fixed tag URIs
  • Fixed small bugs

2009-04-22: Announcing Virtuoso Open-Source Edition v6.0 Technology Preview 1

***IMPORTANT NOTE*** The database format has substantially changed between VOS 5.x and VOS 6.x. To upgrade your database, you must dump all your data from your VOS 5.0 database and re-load it into VOS 6.0.

Currently under very active development, this introduces a new branch for Virtuoso with:

  • ANY ORDER Queries
  • Anytime Queries
  • Client-level resource accounting
  • Expressions in "IN" predicate
  • Facet Browsing Engine
  • Inverse Functional Property Value enhanced Identity
  • Key compression
  • Transitive subqueries in both SQL and SPARQL

2009-04-22: Announcing Virtuoso Open-Source Edition v5.0.11

This version includes:

Database engine

  • Added x.509 Certificate Generation & Management functions
  • Improvements to session-handling (strses) to avoid temp-files and improve threading support
  • Added initial support for gzipped stream session
  • Added support for HTTP, socks4 and socks5 proxying with authentication options
  • Added support for URIQA methods in http_client()
  • Added support for gunzip in http_client
  • Various fixes for FT optimization, fractions in datetime, checkpoint-rollback and the compile/build process.


  • Added compiler extensions for SPARQL graph-level security
  • Added initial implementation of RDF graph-level security metadata functions
  • Added initial infrastructure for new SPARQL result serialization
  • Added support for SSG_VALMODE_SHORT_OR_LONG
  • Added support for define sparql-get:proxy for RDF mappers
  • Enhanced N3 syntax support
  • Added support for XML literals in RDF/XML, SPARQL XML resultset and JSON outputs
  • Enhanced speed of TTL output
  • Fixed SPARQL/SPARUL security
  • VoID graph generation for describing Quad Store

Sponger Cartridges Related

  • Added U.S. Congress Web service
  • Added Tag Lookup Meta Cartridge
  • Added GoodRelations and Barters for eCommerce Services
  • Added NYT Articles Lookup Meta Cartridge
  • Added OpenStreetMap Cartridge
  • Added O'Reilly Books Catalog Lookup Meta Cartridge
  • Added PowerPoint (PPTX) Cartridge
  • Added SCOT based Tag Cloud
  • Added Technocrati Lookup Meta Cartridge
  • Misc. fixes
  • Fixed GPF in rare case when using NOT FROM / NOT FROM NAMED
  • Fixed handling of class instance array
  • Fixed i18N issues with freetext search in RDF
  • Fixed i18N serialization of RDF/XML box
  • Fixed incorrect result when Accept is set to "text/rdf-n3"
  • Fixed passing retvals of variables from OPTION(), like ?SCORE ?x, from deeply nested subselects

ODS Applications

  • Added WebID Protocol and WebID Protocol+OpenID
  • Added Bibliographical ontology usage in ODS Graph
  • Added Calendar API and upstream commands
  • Added "One-Click" X.509 Certificate, Private Key generation plus Browser import, and write to FOAF profile
  • Added Messaging Services
  • Added Relationships Ontology terms to ODS-AddressBook for qualifying relationships in Social Network
  • Added Biographical Ontology terms added to Profile Page UI
  • Added Support for MS Live Contacts API
  • Additional Ubiquity commands for relationship qualification in Social Network data spaces
  • Added Support for Portable contacts API
  • Fixed OpenID registration/auth in WebID Protocol+OpenID implementation

2009-02-15: Announcing Virtuoso Open-Source Edition v5.0.10

This version includes:

Database engine

  • Initial support for JDBC 4.x in the JDBC Driver
  • Self-signed certificates and optional client-verification in HTTPS
  • HTTP ACLs for rate-limiting
  • A new `TOP(N, -1)' function for skipping N rows prior to resultset construction
  • New INI-file options: LiteMode and DisableTcpSocket for thinner embeddable RDF or SQL RDBMS operation; RdfFreeTextRulesSize and IndexTreeMaps for better memory control
  • Fixes for a deadlock handler bug and various 64-bit issues and compiler warnings
  • Performance optimizations in the core database engine

RDF Data Management & Data Access

  • New Meta Cartridges for UMBEL, Calais, Zemanta, Hoovers and the New York Times
  • New Sponger cartridges for AB Meta, Last.FM, Twitter,, LibraryThing,, RadioPop, Rhapsody
  • Added support for WebID Protocol
  • New (X)HTML browser page for RDF Linked Data
  • SPASQL ExtendedString and RdfBox types in .NET
  • new CURIE-generation functions
  • Amazon S3 DET and WebDAV mounting
  • improved Turtle output presentation
  • Various SPARQL and SPARUL updates and extensions and fixes
  • Automated generating OWL from DB schema
  • Fixed memory leaks

ODS Application suite

  • New OAuth support
  • Support for WebID Protocol self-signed certificates written to in FOAF-based member profiles
  • Support for Amazon S3 folders in ODS-Briefcase
  • New contact fields in ODS-AddressBook
  • Ubiquity commands for interacting with all Data Spaces programmatically

Previous Years

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