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public interface HeadFinder
An interface for finding the "head" daughter of a phrase structure tree. This could potentially be any sense of "head", but has mainly been used to find the lexical head for lexicalized PCFG parsing.
Method Summary | |
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Tree |
determineHead(Tree t)
Determine which daughter of the current parse tree is the head. |
Tree |
determineHead(Tree t,
Tree parent)
Determine which daughter of the current parse tree is the head given the parent of the tree. |
Method Detail |
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Tree determineHead(Tree t)
t
- The parse tree to examine the daughters of
java.lang.IllegalStateException
- If a subclass has missing or badly
formatted head rule data
java.lang.IllegalArgumentException
- If the argument Tree has unexpected
phrasal categories in it (and the implementation doesn't just use
some heuristic to always determine some head).Tree determineHead(Tree t, Tree parent)
t
- The parse tree to examine the daughters ofparent
- The parent of tree t
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