ANN: Virtuoso 6.1 (Open Source Edition) Released

We are pleased to announce immediate availability of Virtuoso 6.1.0 
(Open Source Edition):

New Features and Bug Fix Summary:

Database Engine:

  - Significantly reduced database size and system resource consumption 
via new 2+3 index scheme for RDF_QUAD table
  - Added new inlined string table for RDF_QUAD
  - Added enhanced cost optimizer

SPARQL:

  - Added support for owl:inverseOf, owl:SymmetricProperty, and 
owl:TransitiveProperty to reasoner
  - Added DB.DBA.BEST_LANGMATCH() and bif_langmatches_pct_http()
  - Added support for expressions in LIMIT and OFFSET clauses
  - Added built-in predicate IsRef()
  - Added support for SPARQL INSERT DATA / DELETE DATA
  - Added SPARQL 1.1 syntax sugar re. HAVING CLAUSE for filtering on 
GROUP BY
  - Added special code generator for optimized handling of: SPARQL 
SELECT DISTINCT ?g WHERE { GRAPH ?g { ?s ?p ?o } }
  - Added support for HTML+RDFa representation re. output from SPARQL 
CONSTRUCT and DESCRIBE queries

*Important Note:

Upgrading from pre-6.x versions:*

The database file format has substantially changed between versions 5.x 
and  6.x. To upgrade your database, you must dump all data from the 
version 5.x database and re-load it into version 6.x. Complete 
instructions may be found /here/ 
<http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/UpgradingToVOS610>/./

*Upgrading from earlier 6.x versions:*

The database file format has not changed, but the introduction of a 
newer RDF index requires you run a script to upgrade the RDF_QUAD table. 
Since this can be a lengthy task and take extra disk space (up to twice 
the space used by the original RDF_QUAD table may be required during 
conversion) this is not done automatically on startup. Complete 
instructions may be found /here/ 
<http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/UpgradingToVOS610>.

Links:

1. http://virtuoso.openlinksw.com/wiki/main/ -- product home page
2.  http://virtuoso.openlinksw.com/wiki/main/Main/VOSDownload -- product 
download page
<http://virtuoso.openlinksw.com/wiki/main/Main/VOSDownload>

<http://virtuoso.openlinksw.com/wiki/main/Main/VOSDownload>

-- 

Regards,

Kingsley Idehen	      
President & CEO 
OpenLink Software     
Web: http://www.openlinksw.com
Weblog: http://www.openlinksw.com/blog/~kidehen
Twitter: kidehen

Received on Thursday, 4 February 2010 12:27:54 UTC