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The Use of Situation Theory in Context Modelingby: Varol Akman, Mehmet Surav
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Notes for this articleUses situation theory to model context.
Situation theory has two primitive notions: infons and situations.
It represents a context by on a situation type that supports two kinks of infons: (i) factual infons to state facts, and (ii) constraints (which correspond to parametric condidtionals) to capture the if-then relations holding within the contest.
It also shows how to do lifting with this model.
It has two major advantages over other context models:
1. Dynamic contexts through nonmonoticity
2. Natural language support
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AbstractAt the heart of natural language processing is the understanding of context dependent meanings. This paper presents a preliminary model of formal contexts based on situation theory. It also gives a worked-out example to show the use of contexts in lifting, i.e., how propositions holding in a particular context transform when they are moved to another context. This is useful in NLP applications where preserving meaning is a desideratum.
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