[DL] -ontop- New Release!!!

Rezk Martin mrezk at inf.unibz.it
Wed Nov 5 19:08:38 CET 2014


We are happy to announce the availability of

               -ontop- v.1.14 

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
great  performance.

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.


-Bug Fixes:
**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

   http://ontop.inf.unibz.it/

Please, try it out and help us improve it by sending us your feedback.
Tell us how YOU are using -ontop-!
https://github.com/ontop/ontop/wiki/UseCases

To start using -ontop- try our new tutorials!

-Easy Tutorial: Using Ontop from Protege
-Easy Tutorial: Using Ontop API from Eclipse
(https://github.com/ontop/ontop/wiki)

Cheers,
The -ontop- development team


PS.

Website:
http://ontop.inf.unibz.it

Documentation:
https://github.com/ontop/ontop/wiki

Github:
https://github.com/orgs/ontop/

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