- From: Rezk Martin <mrezk@inf.unibz.it>
- Date: Thu, 25 Sep 2014 14:31:49 +0000
- To: "semantic-web@w3.org" <semantic-web@w3.org>, "dl@dl.kr.org" <dl@dl.kr.org>
We are happy to announce the availability of -ontop- v.1.13 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: -New mechanism to specify DB implicit constraints (such as implicit keys) that are not specified in the DB (this is used for optimisation). -Command line feature to generate pretty R2RML. -Stream output in the Protege Plugin. -Support for Regex operators in the mapping language. -Proper handling of datatypes in ontology and mappings, including type promotion and type checking. -Support for HSQL database. -Improved support for datatypes xsd:date, xsd:time and xsd:gYear -Bug Fixes: ** Issue with nested equivalences in the unfolder. ** Problem with multiple join conditions in R2RML. ** Cancelling running queries in Protege. ** Blank lines in generated sql. 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/ Follow us on Facebook https://www.facebook.com/obdaontop
Received on Thursday, 25 September 2014 14:39:32 UTC