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 />
Multiple inheritance allows classification on multiple dimensions<br />
◮ In the CFG way, strings are classified in only one dimension.<br />
What do these CFG categories have in common<br />
NP VP are both phrases<br />
N V are both words<br />
NP N are both ‘nouny’<br />
VP V are both ‘verby’<br />
Weiwei Sun <strong>Head</strong>-<strong>driven</strong> <strong>Phrase</strong> <strong>Structure</strong> <strong>Grammar</strong> I 16/61