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Philosophy: “a particular system of categories accounting for a
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certain
vision of the world” or domain of discourse, a
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conceptualization
(Big O)
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Artificial Intelligence: “an engineering product consisting of a
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specific
vocabulary used to describe a part of reality, plus a set
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of
explicit assumptions regarding the intended meaning of the
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vocabulary
words”, “a specification of a conceptualization”
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(Little O)
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Ontological Engineering: towards a formal, logical theory,
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usually
‘concepts’ (i.e., the entities, usually classes
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hierarchically
structured in a special subsumption relation),
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‘relations’,
‘properties’, ‘values’, ‘constraints’, ‘rules’,
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‘instances’
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