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    • Modalities for an Allegorical Conceptual Data Model 

      Zielińsk, Bartosz; Maślanka, Paweł; Sobieski, Ścibor (MDPI AG, 2014)
      Allegories are enriched categories generalizing a category of sets and binary relations. In this paper, we extend a new, recently-introduced conceptual data model based on allegories by adding support for modal operators ...