Unification and Default Unification
نویسنده
چکیده
Unification of (typed) feature structures is an important tool for capturing linguistic generalizations. It is the core of a family of linguistic formalisms, it has been applied in phonology, morphology, syntax, and semantics, and is dominant in most linguistically informed work in natural language processing. Unification monotonically merges information. Default unification provides a non-monotonic counterpart of this operation, which can be used to streamline the definition of grammars and lexica, as it supports concise encodings of generalizations as well as exceptions to generalizations.
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