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Discovering functional dependencies from ontologies
Romero Moral, Óscar; Calvanese, Diego; Abelló Gamazo, Alberto; Rodríguez Muro, Mariano
Universitat Politècnica de Catalunya. Departament de Llenguatges i Sistemes Informàtics; Universitat Politècnica de Catalunya. Departament d'Enginyeria de Serveis i Sistemes d'Informació; Universitat Politècnica de Catalunya. MPI - Modelització i processament d´informació
Nowadays, it is widely accepted that the data warehouse design task should be largely automated. Furthermore, the data warehouse conceptual schema must be structured according to the multidimensional model and as a consequence, the most common way to automatically look for subjects and dimensions of analysis is by discovering functional dependencies (as dimensions functionally depend on the fact) over the data sources. Most advanced methods for automating the design of the data warehouse carry out this process from relational OLTP systems, assuming that a RDBMS is the most common kind of data source we may find, and taking as starting point a relational schema. In contrast, in our approach we propose to rely instead on a conceptual representation of the domain of interest formalized through a domain ontology expressed in the DL-Lite Description Logic. We propose an algorithm to discover functional dependencies from the domain ontology that exploits the inference capabilities of DL-Lite, thus fully taking into account the semantics of the domain. We also provide an evaluation of our approach in a real-world scenario.
Peer Reviewed
Àrees temàtiques de la UPC::Informàtica::Informàtica teòrica::Algorísmica i teoria de la complexitat
Àrees temàtiques de la UPC::Informàtica::Sistemes d'informació
Information storage and retrieval systems
Logic design
Algorithms
Ontology
Informació -- Sistemes d'emmagatzematge i recuperació
Estructura lògica -- Informàtica
Algorismes
Ontologia
info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Association for Computing Machinery (ACM)
         

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