Ontop

Answering SPARQL Queries over Databases under OWL 2 QL Entailment Regime. We present an extension of the ontology-based data access platform Ontop that supports answering SPARQL queries under the OWL 2 QL direct semantics entailment regime for data instances stored in relational databases. On the theoretical side, we show how any input SPARQL query, OWL 2 QL ontology and R2RML mappings can be rewritten to an equivalent SQL query solely over the data. On the practical side, we present initial experimental results demonstrating that by applying the Ontop technologies—the tree-witness query rewriting, -mappings compiling R2RML mappings with ontology hierarchies, and -mapping optimisations using SQL expressivity and database integrity constraints—the system produces scalable SQL queries.


References in zbMATH (referenced in 15 articles , 1 standard article )

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  1. Fiorentino, Alessio; Zangari, Jessica; Manna, Marco: DaRLing: a Datalog rewriter for OWL 2 RL ontological reasoning under SPARQL queries (2020)
  2. Luigi Bellomarini, Georg Gottlob, Emanuel Sallinger: The Vadalog System: Datalog-based Reasoning for Knowledge Graphs (2020) arXiv
  3. Botoeva, Elena; Lutz, Carsten; Ryzhikov, Vladislav; Wolter, Frank; Zakharyaschev, Michael: Query inseparability for (\mathcalALC) ontologies (2019)
  4. Gerasimova, Olga; Kikot, Stanislav; Zakharyaschev, Michael: Checking the data complexity of ontology-mediated queries: a case study with non-uniform CSPs and Polyanna (2019)
  5. Güzel Kalayci, Elem; Brandt, Sebastian; Calvanese, Diego; Ryzhikov, Vladislav; Xiao, Guohui; Zakharyaschev, Michael: Ontology-based access to temporal data with Ontop: a framework proposal (2019)
  6. Nikolaou, Charalampos; Kostylev, Egor V.; Konstantinidis, George; Kaminski, Mark; Cuenca Grau, Bernardo; Horrocks, Ian: Foundations of ontology-based data access under bag semantics (2019)
  7. Benedikt, Michael; Grau, Bernardo Cuenca; Kostylev, Egor V.: Logical foundations of information disclosure in ontology-based data integration (2018)
  8. Carral, David; Krötzsch, Markus; Marx, Maximilian; Ozaki, Ana; Rudolph, Sebastian: Preserving constraints with the stable chase (2018)
  9. Kaminski, Mark; Kostylev, Egor V.: Complexity and expressive power of weakly well-designed SPARQL (2018)
  10. Schoenfisch, Joerg; Stuckenschmidt, Heiner: Analyzing real-world SPARQL queries and ontology-based data access in the context of probabilistic data (2017)
  11. Botoeva, Elena; Kontchakov, Roman; Ryzhikov, Vladislav; Wolter, Frank; Zakharyaschev, Michael: Games for query inseparability of description logic knowledge bases (2016)
  12. Bienvenu, Meghyn; Ortiz, Magdalena: Ontology-mediated query answering with data-tractable description logics (2015)
  13. Gottlob, Georg; Kikot, Stanislav; Kontchakov, Roman; Podolskii, Vladimir; Schwentick, Thomas; Zakharyaschev, Michael: The price of query rewriting in ontology-based data access (2014)
  14. Kontchakov, Roman; Rezk, Martin; Rodríguez-Muro, Mariano; Xiao, Guohui; Zakharyaschev, Michael: Answering SPARQL queries over databases under OWL 2 QL entailment regime (2014) ioport
  15. Rodríguez-Muro, Mariano; Kontchakov, Roman; Zakharyaschev, Michael: Ontology-based data access: (Ontop) of databases (2013) ioport