Orri Erling's Weblog http://www.openlinksw.com/weblog/oerling/ oerling@openlinksw.com 2009-11-23T10:51:12Z Announcing Virtuoso Open-Source Edition v5.0.0 2007-04-12T10:30:29Z 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) Basic Inferencing (Subclass and Subproperty Support) SPARQL Aggregate Functions SPARQL Update Language Support (Updates, Inserts, Deletions in SPARQL) 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) Various bug-fixes 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: Home Page: http://virtuoso.openlinksw.com/wiki/main/ Download Page: http://virtuoso.openlinksw.com/wiki/main/Main/VOSDownload OpenLink Data Spaces: Home Page: http://virtuoso.openlinksw.com/wiki/main/Main/OdsIndex SPARQL Usage Examples (re. SIOC, FOAF, AtomOWL, SKOS): http://virtuoso.openlinksw.com/wiki/main/Main/ODSSIOCRef Interactive SPARQL Demo: http://demo.openlinksw.com/isparql/ OpenLink AJAX Too lkit (OAT): Project Page: http://sourceforge.net/projects/oat Live Demonstration: http://demo.openlinksw.com/DAV/JS/oat/index.html Technorati Tags: database, databases, open-source, OpenLink, SPARQL, RDBMS, RDF, semantic web, Semantic Web, virtuoso 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)
  • Basic Inferencing (Subclass and Subproperty Support)
  • SPARQL Aggregate Functions
  • SPARQL Update Language Support (Updates, Inserts, Deletions in SPARQL)
  • 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)
  • Various bug-fixes
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):

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]]> Recent Virtuoso Developments 2006-09-19T10:59:30Z We have been extensively working on virtual database refinements.  There aremany SQL cost model adjustments to better model  distributed queries and wenow support direct access to Oracle and Informix statistics system tables.Thus, when you attach  a table from one or the other, you automatically getup to date statistics.  This helps Virtuoso optimize distributed  queries.Also the documentation is updated as concerns these, with a new section ondistributed query optimization. On the applications side, we have been keeping up with the SIOC RDF ontologydevelopments.  All ODS applications now make  their data available as SIOCgraphs for download and SPARQL query access. What is most exciting however is our advance in mapping relational data intoRDF.  We now have a mapping language that makes  arbitrary legacy data in Virtuoso or elsewhere in the relational world RDF queriable.  We will putout a white paper on  this in a few days. Also we have some innovations in mind for optimizing the physical storage ofRDF triples.  We keep experimenting, now with  our sights set to the highend of triple storage, towards billion triple data sets.  We areexperimenting with a new more space efficient index structure  for betterworking set behavior.  Next week will yield the first results. SQL Database Databases Virtuoso Programming Semantic Web SPARQL We have been extensively working on virtual database refinements.  There aremany SQL cost model adjustments to better model  distributed queries and wenow support direct access to Oracle and Informix statistics system tables.Thus, when you attach  a table from one or the other, you automatically getup to date statistics.  This helps Virtuoso optimize distributed  queries.Also the documentation is updated as concerns these, with a new section ondistributed query optimization.

On the applications side, we have been keeping up with the SIOC RDF ontologydevelopments.  All ODS applications now make  their data available as SIOCgraphs for download and SPARQL query access.

What is most exciting however is our advance in mapping relational data intoRDF.  We now have a mapping language that makes  arbitrary legacy data in Virtuoso or elsewhere in the relational world RDF queriable.  We will putout a white paper on  this in a few days.

Also we have some innovations in mind for optimizing the physical storage ofRDF triples.  We keep experimenting, now with  our sights set to the highend of triple storage, towards billion triple data sets.  We areexperimenting with a new more space efficient index structure  for betterworking set behavior.  Next week will yield the first results.

]]> Recent Virtuoso Developments 2006-09-19T10:59:30Z We have been extensively working on virtual database refinements.  There aremany SQL cost model adjustments to better model  distributed queries and wenow support direct access to Oracle and Informix statistics system tables.Thus, when you attach  a table from one or the other, you automatically getup to date statistics.  This helps Virtuoso optimize distributed  queries.Also the documentation is updated as concerns these, with a new section ondistributed query optimization. On the applications side, we have been keeping up with the SIOC RDF ontologydevelopments.  All ODS applications now make  their data available as SIOCgraphs for download and SPARQL query access. What is most exciting however is our advance in mapping relational data intoRDF.  We now have a mapping language that makes  arbitrary legacy data in Virtuoso or elsewhere in the relational world RDF queriable.  We will putout a white paper on  this in a few days. Also we have some innovations in mind for optimizing the physical storage ofRDF triples.  We keep experimenting, now with  our sights set to the highend of triple storage, towards billion triple data sets.  We areexperimenting with a new more space efficient index structure  for betterworking set behavior.  Next week will yield the first results. SQL Database Databases Virtuoso Programming Semantic Web SPARQL We have been extensively working on virtual database refinements.  There aremany SQL cost model adjustments to better model  distributed queries and wenow support direct access to Oracle and Informix statistics system tables.Thus, when you attach  a table from one or the other, you automatically getup to date statistics.  This helps Virtuoso optimize distributed  queries.Also the documentation is updated as concerns these, with a new section ondistributed query optimization.

On the applications side, we have been keeping up with the SIOC RDF ontologydevelopments.  All ODS applications now make  their data available as SIOCgraphs for download and SPARQL query access.

What is most exciting however is our advance in mapping relational data intoRDF.  We now have a mapping language that makes  arbitrary legacy data in Virtuoso or elsewhere in the relational world RDF queriable.  We will putout a white paper on  this in a few days.

Also we have some innovations in mind for optimizing the physical storage ofRDF triples.  We keep experimenting, now with  our sights set to the highend of triple storage, towards billion triple data sets.  We areexperimenting with a new more space efficient index structure  for betterworking set behavior.  Next week will yield the first results.

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