- From: Rezk Martin <mrezk@inf.unibz.it>
- Date: Wed, 5 Nov 2014 18:08:38 +0000
- To: Semantic Web <semantic-web@w3.org>, "protege-user@lists.stanford.edu" <protege-user@lists.stanford.edu>, "dl@dl.kr.org" <dl@dl.kr.org>
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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https://www.facebook.com/obdaontop
Received on Wednesday, 5 November 2014 18:12:07 UTC