Announcing OpenLink Virtuoso Open-Source Edition, v5.0.7

OpenLink Software is pleased to announce a new release of Virtuoso, Open-Source Edition, version 5.0.7.

This release includes:

New: fully operational Native Graph Model Storage Providers for the Jena & Sesame Frameworks.

Licensing change: the Jena and Sesame providers have been added to the "Client Protocol Driver exemptions" paragraph in the VOS License:

- Better support for alternate RDF indexing schemes
- Parallelization of RDF sponger operations across multiple RDF data-sources concurrently
- New Sponger Cartridges and enhancements to the existing Cartridge collection
- Inference engine optimizations for subclass and subproperty that efficiently handle taxonomies numbering tens of thousands of classes.
- OWL equivalentClass and equivalentProperty inference support.
- Dynamic handling of host component of IRIs; host component is now flexible enough to painlessly handle multiple homing of domains and host name component changes; no duplicate host name data storage required via [URIQA] section of INI
- SPARQL optimizations to improve LIMIT and OFFSET handling
- JDBC driver has new connect options, smaller memory footprint and optimized batch support
- ODS applications now support SyncML

Documentation Additions:
- How to read query plans and how to use the key performance meters
- How to diagnose SPARQL queries and how to decide what indexing scheme is right for each RDF use case
- How to debug RDF views
- Better Documentation on SPARQL extensions and options
- An updated RDF View example based on the Northwind demonstration database that reflects underlying enhancements

Bug Fixes:
- Generally improved safety of built-in functions, better argument checking.
- Verified UTF8 internationl character support in all RDF use cases, SQL client/SPARQL protocol/all data formats.

For more details, see the release notes:

Other links:

Virtuoso Open Source Edition:
Home Page:
Download Page:

OpenLink Data Spaces:
Home Page:
SPARQL Usage Examples (re. SIOC, FOAF, AtomOWL, SKOS):

OpenLink AJAX Toolkit (OAT):
Project Page:
Live Demonstration:
Interactive SPARQL Demo:

OpenLink Data Explorer (Firefox extension for RDF browsing):

Posted by Tim Haynes 2008-07-18

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