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
