Feature Structure ( Concept )

      |_ Abstract
            |_ Linguistic Data Structure
                  |_ Feature Structure


A FeatureStructure is a set of one or more FeatureSpecifications. A FeatureStructure is a kind of information structure, a container or data structure, used to group together qualities or features of some object. In a grammatical feature system, a FeatureStructure holds the grammatical information associated with some linguistic unit. In a typed feature system, a FeatureStructure has an associated type, usually a PartOfSpeech. [Shieber 1986; Maxwell, Simons, and Hayashi 2000].

data Structure Relation Thing     This subsumes all structuring relations used for LinguisticDataStructures. As a naming convention to distinguish relations in data structure from other relations, all names of dataStructuringRelations begin with 'has-'.
has Specification Feature Specification     This relates a FeatureStructure to a FeatureSpecification.
has Type Thing     This relates either a FeatureStructure or a FeatureConstraint to its type, expressed by an instance of PartOfSpeech.

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