Package nltk_lite :: Package tag :: Module brill :: Class Brill
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Class Brill

source code

     object --+    
              |    
yaml.YAMLObject --+
                  |
                 Brill

Brill's transformational rule-based tagger. Brill taggers use an initial tagger (such as tag.Default) to assign an intial tag sequence to a text; and then apply an ordered list of transformational rules to correct the tags of individual tokens. These transformation rules are specified by the BrillRuleI interface.

Brill taggers can be created directly, from an initial tagger and a list of transformational rules; but more often, Brill taggers are created by learning rules from a training corpus, using either BrillTrainer or FastBrillTrainer.

Nested Classes [hide private]

Inherited from yaml.YAMLObject: __metaclass__, yaml_dumper, yaml_loader

Instance Methods [hide private]
 
__init__(self, initial_tagger, rules)
x.__init__(...) initializes x; see x.__class__.__doc__ for signature
source code
 
rules(self) source code
 
tag(self, tokens) source code

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

Class Methods [hide private]

Inherited from yaml.YAMLObject: from_yaml, to_yaml

Class Variables [hide private]
  yaml_tag = '!tag.Brill'

Inherited from yaml.YAMLObject: yaml_flow_style

Properties [hide private]

Inherited from object: __class__

Method Details [hide private]

__init__(self, initial_tagger, rules)
(Constructor)

source code 

x.__init__(...) initializes x; see x.__class__.__doc__ for signature

Parameters:
  • initial_tagger (TagI) - The initial tagger
  • rules (list of BrillRuleI) - An ordered list of transformation rules that should be used to correct the initial tagging.
Overrides: object.__init__