Package nltk :: Package ccg :: Module api :: Class Direction

classobj_type Direction

Class representing the direction of a function application. Also contains maintains information as to which combinators may be used with the category.

Instance Methods

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__init__(self, dir, restrictions)

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is_forward(self)

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is_backward(self)

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dir(self)

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restrs(self)
A list of restrictions on the combinators.

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is_variable(self)

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can_unify(self, other)

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substitute(self, subs)

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can_compose(self)

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can_cross(self)

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__cmp__(self, other)

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__hash__(self)

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__str__(self)

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__neg__(self)

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Method Details

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restrs(self)

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A list of restrictions on the combinators. '.' denotes that permuting operations are disallowed ',' denotes that function composition is disallowed '_' denotes that the direction has variable restrictions. (This is redundant in the current implementation of type-raising)