[DL] -ontop- New Release!!!
mrezk at inf.unibz.it
Wed Nov 5 19:08:38 CET 2014
We are happy to announce the availability of
a Java framework to query ontologies with mappings to databases.
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
With -ontop-, you don't need to move your data from your already
efficient database in order to enjoy the benefits of the RDF data
model, the SPARQL query language or RDF/OWL2QL inference.
And there is no need for expensive ETL or forward/backward chaining either.
You can use -ontop- as an API, a SPARQL end-point, or as a Protege plugin.
The highlights of this new release include:
— Improved stability of the Protege Plugin.
— Improved Performance.
—Added support in ontology and mappings for datatypes xsd:int, xsd:long, xsd:positiveInteger, xsd:negativeInteger, xsd:nonPositiveInteger, xsd:nonNegativeInteger, xsd:float.
—Optimized implementations of TBox classifications, and query containment checking.
—Better validation for Sesame Workbench. It prevents repositories with an invalid configuration to be created.
**Fix SPARQL functions (str(), lang()) to use rdfs:Literal instead of xsd:string.
**Issue converting datatypes of R2RML constants.
**Support UNICODE characters in TurtleParser.
**Catch exceptions for Protege R2RML Export.
**Fix conversion from ontop mappings to R2RML of language tag and triples.
Thanks a lot to Dag Hovland (University of Oslo) and Roman Kontchakov (Birkbeck, University of London) for their
major contributions to this release.
The system is available for FREE at
Please, try it out and help us improve it by sending us your feedback.
Tell us how YOU are using -ontop-!
To start using -ontop- try our new tutorials!
-Easy Tutorial: Using Ontop from Protege
-Easy Tutorial: Using Ontop API from Eclipse
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