Package nltk :: Package parse :: Module chart :: Class TopDownExpandRule

Class TopDownExpandRule

       object --+    
                |    
AbstractChartRule --+
                    |
                   TopDownExpandRule

Known Subclasses:

A rule licensing edges corresponding to the grammar productions for the nonterminal following an incomplete edge's dot. In particular, this rule specifies that:

[A→α*Bβ][i:j]

licenses the edge:

[B→*γ][j:j]

for each grammar production B→γ.

Instance Methods

[hide private]

apply_iter(self, chart, grammar, edge)

source code

Inherited from AbstractChartRule: __str__, apply, apply_everywhere, apply_everywhere_iter

Inherited from object: __delattr__, __getattribute__, __hash__, __init__, __new__, __reduce__, __reduce_ex__, __repr__, __setattr__

Class Variables

[hide private]

NUM_EDGES = 1

Properties

[hide private]

Inherited from object: __class__

Method Details

[hide private]

apply_iter(self, chart, grammar, edge)

source code

Overrides: AbstractChartRule.apply_iter