Head-driven Phrase Structure Grammar I

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Basic Idea Typed feature structure HPSG: First glance Features and values ◮ Whereas NPs, VPs, NNs, etc. are conceived of as categories (first-class “citizens”) in the grammar, features are more property-like. ◮ Features are conceived of as the atomic units that compose more complex categories. ◮ The VP has the feature value past tense. ◮ The verb is a past tense verb. ◮ The noun has a case feature accusative. A noun is a feature set of semantic, morphological and phonological features: ⎡ form ⎢ ⎣number animacy ⎤ dog ⎥ singular ⎦ animate Weiwei Sun Head-driven Phrase Structure Grammar I 5/61
Basic Idea Typed feature structure HPSG: First glance Feature structure ◮ Use a feature structure to specify of grammatical information. ◮ Formally, a feature structure is a specification of a set of features, each of which is paired with a particular value. Descriptions Feature structures can be represented by a type of attribute-value matrix (AVM). ⎡ ⎤ FEATURE 1 VALUE 1 FEATURE 2 VALUE 2 ⎢ ⎣... ⎥ ⎦ FEATURE n VALUE n Example 〈 [ ]〉 pos noun bird, num singular Weiwei Sun Head-driven Phrase Structure Grammar I 6/61
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Head-driven Phrase Structure Grammar I

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