The concept of an historical database is introduced as a tool formodelling the dynamic nature of some part of the real … semantics of the relational database model,intensional logic is presented as an analogous formalism for expressing … andunderstanding the temporal semantics involved in an historical database.The various components of the relational model, as extended …

. We introduce the notion of reference time - the timethat any operation is applied to the database state - and provide a …

The manual construction of formal domain conceptualizations (ontologies) is labor-intensive. Ontology learning, by … contrast, provides (semi-)automatic ontology generation from input data such as domain text. This thesis proposes a novel … approach for learning labels of non-taxonomic ontology relations. It combines corpus-based techniques with reasoning on …

representing ontologies. More recently, the OWL Web Ontology Language is becoming established as the W3C recommended ontology … other. We propose the use of the COIN strategy to solve context disparity and ontology interoperability problems in the … emerging Semantic Web both at the ontology level and at the data level. In this work we showcase how the problems that arise …

. In this paper, we address the various semantic differences from the context perspective and use a lightweight ontology to …