The Ontop Framework for Ontology Based Data Access

نویسندگان

  • Timea Bagosi
  • Diego Calvanese
  • Josef Hardi
  • Sarah Komla-Ebri
  • Davide Lanti
  • Martín Rezk
  • Mariano Rodriguez-Muro
  • Mindaugas Slusnys
  • Guohui Xiao
چکیده

Ontology Based Data Access (OBDA) [4] is a paradigm of accessing data trough a conceptual layer. Usually, the conceptual layer is expressed in the form of an RDF(S) [10] or OWL [15] ontology, and the data is stored in relational databases. The terms in the conceptual layer are mapped to the data layer using mappings which associate to each element of the conceptual layer a (possibly complex SQL) query over the data sources. The mappings have been formalized in the recent R2RML W3C standard [6]. This virtual graph can then be queried using an RDF query language such as SPARQL [7]. Formally, an OBDA system is a triple O = 〈T ,S,M〉, where:

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تاریخ انتشار 2014