All,
OpenLink Software are pleased to announce a new release of
Virtuoso
, Open-Source Edition, version 5.0.0.
This version includes:
-
Significant rewrite of database engine resulting in 50%-100% improvement on single CPU and in some cases up to 300% on multiprocessor CPUs by decreasing resource-contention between threads and other optimizations.
-
Radical expansion of RDF support including
-
In-built middleware (called the Sponger) for transforming non-RDF into RDF "on the fly" (e.g. producing Triples from Microformats, REST-style Web Services, and (X)HTML etc.)
-
Full Text Indexing of Literal Objects in Triple Patterns (via Filter or magic bif:contains predicate applied to Literal Objects)
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Basic Inferencing (Subclass and Subproperty Support)
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SPARQL Aggregate Functions
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SPARQL Update Language Support (Updates, Inserts, Deletions in SPARQL)
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Improved Support of XML Schema Type System (including the use of XML Schema Complex Types as Objects of bif:xcontains predicate)
-
Enhancements to the in-built SPARQL to SQL Compiler's Cost Optimizer
-
Performance Optimizations to RDF VIEWs (SQL to RDF Mapping)
NOTE: Databases created with earlier versions of Virtuoso will be automatically upgraded to Virtuoso 5.0 but after upgrade will not be readable with older Virtuoso versions.
For more information please see:
Virtuoso Open Source Edition:
OpenLink Data Spaces:
OpenLink AJAX Too lkit (OAT):
Technorati Tags: database, databases, open-source, OpenLink, SPARQL, RDBMS, RDF, semantic web, Semantic Web, virtuoso