Head-driven Phrase Structure Grammar I
Head-driven Phrase Structure Grammar I
Head-driven Phrase Structure Grammar I
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Basic Idea Typed feature structure HPSG: First glance<br />
Type hierarchy: Informal idea<br />
A type hierarchy<br />
◮ states what kinds of objects we claim exist (the types)<br />
◮ organizes the objects hierarchically into classes with shared<br />
properties (the type hierarchy)<br />
◮ states what general properties each kind of object has (the<br />
feature and feature value declarations).<br />
◮ describes a classification of feature structures.<br />
⇒ It classifies the corresponding linguistic objects modeled by the<br />
feature structures.<br />
Types are occasionally referred to as sorts.<br />
Weiwei Sun <strong>Head</strong>-<strong>driven</strong> <strong>Phrase</strong> <strong>Structure</strong> <strong>Grammar</strong> I 15/61