ontop-obda.blogspot.com
-ontop- Blog: August 2012
http://ontop-obda.blogspot.com/2012_08_01_archive.html
Latest news about the -ontop-, the Java framework for OBDA. Sunday, August 26, 2012. See you in Boston for ISWC 2012! The demo for ISWC went through! We will be having a stand during the demo session of ISWC 2012 in Boston! This will be a great opportunity to have discussion on OBDA, mappings and projects. If you would like to meet during that week, let us know! Wednesday, August 22, 2012. QuestOWL is now available. A simple JDBC-like interface for connections and queries. Tuesday, August 21, 2012. Final...
ontop-obda.blogspot.com
-ontop- Blog: New ontop tutorial
http://ontop-obda.blogspot.com/2013/09/new-ontop-tutorial.html
Latest news about the -ontop-, the Java framework for OBDA. Wednesday, September 18, 2013. A few weeks ago there was the short-Protege course in Vienna. We were invited to give a talk on ontopPro and now I want to share the material. It's tutorial on how to create mappings using ontop, how inference (OWL 2 QL and RDFS) plays a role answering SPARQL queries in ontop, and how ontop's support for on-the-fly SQL query translation enables scenarios of semantic data access and data integration.
ontop-obda.blogspot.com
-ontop- Blog: June 2012
http://ontop-obda.blogspot.com/2012_06_01_archive.html
Latest news about the -ontop-, the Java framework for OBDA. Wednesday, June 13, 2012. V17-alpha-b1529 is now available. A new build for v1.7-alpha is now available. This time we focused on improving user interaction and solving important bugs/issues related to stability and we are happy to say that this is our most stable and user-friendly build to the date. Highlights of this new build include:. Improved error reporting and error message in Quest. Better layout, improved fonts and other GUI enhancements.
ontop-obda.blogspot.com
-ontop- Blog: March 2013
http://ontop-obda.blogspot.com/2013_03_01_archive.html
Latest news about the -ontop-, the Java framework for OBDA. Tuesday, March 5, 2013. New build on the oven. Following last release, we have been cooking the next release. Goodies to expect in this release are:. Support for multiple JDBC connections by connection pooling. Which means better performance in multithreaded environments. Support for multiple clients for the SPARQL end-point (btw, we are getting GREAT performance in comparison to single client benchmarks). First implementation of R2RML.
ontop-obda.blogspot.com
-ontop- Blog: October 2012
http://ontop-obda.blogspot.com/2012_10_01_archive.html
Latest news about the -ontop-, the Java framework for OBDA. Sunday, October 14, 2012. A small status update. Also, even though we haven't fully finished the implementation it is already in a good state to cover most queries, so Mindaugas is setting up the environment for running the Berlin Benchmark. Expect some number comparing MySQL D2RQ, Virtuoso virtual RDF graphs and Quest (running on top of MySQL) very very soon. FishMark: A Linked Data Application Benchmark. SSWS, 2012. ISWC 2012 workshop.
ontop-obda.blogspot.com
-ontop- Blog: April 2013
http://ontop-obda.blogspot.com/2013_04_01_archive.html
Latest news about the -ontop-, the Java framework for OBDA. Friday, April 5, 2013. Build 2305 is available. The highlights of this new release include:. Support for importing/exporting R2RML mappings. Support for automated mapping generation as defined by the "Direct Mapping" W3C specification. Various options for data materialization (similar to dump-rdf in D2RQ). Support for concurrent queries in the SPARQL endpoint through connection pooling. Better support for Oracle, Postgres, SQL Server and DB2.
ontop-obda.blogspot.com
-ontop- Blog: December 2012
http://ontop-obda.blogspot.com/2012_12_01_archive.html
Latest news about the -ontop-, the Java framework for OBDA. Monday, December 24, 2012. Tons of new features! We are happy to announce the availability of a new build 2039 of -ontop- v1.7-alpha, a Java framework to query RDFS/OWL2QL ontologies with mappings to databases. The SPARQL engine, Quest, implements the latests techniques in SPARQL-to-SQL rewriting, produces very fast SQL queries and supports inference out of the box. The framework is still in alpha and has several rough edges. Multiple improvemen...
ontop-obda.blogspot.com
-ontop- Blog: Hybrid RDF Graphs (or, Hybrid ABoxes, as you want to see it ;-) )
http://ontop-obda.blogspot.com/2013/09/hybrid-rdf-graphs-or-hybrid-aboxes-as.html
Latest news about the -ontop-, the Java framework for OBDA. Thursday, September 19, 2013. Hybrid RDF Graphs (or, Hybrid ABoxes, as you want to see it ;-) ). This is a exciting new feature that allows to combine virtual RDF (mappings) with real RDF (or, virtual ABoxes with ABox assertions). This is a unique feature in ontop, in other systems either you have mappings and everything is about SPARQL to SQL, or you have triples and you have a triple store. Bill Gates :ceoOf :Microsoft. Bill Gates :age "57" xs...
ontop-obda.blogspot.com
-ontop- Blog: v1.8 now available
http://ontop-obda.blogspot.com/2013/07/v18-now-available.html
Latest news about the -ontop-, the Java framework for OBDA. Wednesday, July 31, 2013. We are happy to announce the availability of. A Java framework to query RDBMS using SPARQL over RDF(s) and OWL ontologies. If you are interested in virtual RDF graphs, R2RML mappings and/or RDFS/OWL2QL reasoning, then -ontop- is for you. The system implements the cutting edge SPARQL-to-SQL and query optimisation techniques that allow it to answer SPARQL queries using SQL databases while obtaining great performance.
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