Abstract and Keywords
This chapter is about ontologies: that is, knowledge models of a domain of interest. We introduce ontologies, its building blocks and sections, view them from the perspective of several fields of knowledge (computer science, philosophy, software engineering, etc.), and present existing ontologies and the different tasks of ontology building, learning, matching, mapping, and merging. We also review interfaces for building ontologies and the knowledge representation languages used to implement them. Finally, we discuss the different ways of evaluating an ontology and the applications in which it can be used, including word sense disambiguation, reasoning, question answering, semantic information retrieval. and machine translation.
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