Virtuoso Open Source 5.0 Release Imminent

We are a couple of days from releasing the Virtuoso Open Source 5.0 cut. This will make the technology that we are showing with Dbpedia and the various OpenLink web sites available to the public.

The updates involve:

  • Significant database engine improvements, as discussed in previous posts.
  • Tons of RDF related bug fixes.
  • Text index extension to SPARQL
  • New SQL data type capturing the whole XML Schema scalar type system used in RDF.

Soon to follow are:

  • Basic inference for RDF, including type and property subsumption.
  • Whole new disk IO system with much better disk locality.

Existing databases will be automatically upgraded when started with the new Virtuoso 5.0 server. Note that after upgrade, the RDF data is not backward compatible.

We will be rolling out more Virtuoso hosted semantic web content in the Linking Open Data project, part of our participation in the Semantic Web Education and Outreach activity at W3C.

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