rita.support
Class BrillPosTagger

java.lang.Object
  rita.support.BrillPosTagger

All Implemented Interfaces:

RiTaggerIF

public class BrillPosTagger
extends java.lang.Object
implements RiTaggerIF

Simple transformation-based pos-tagger for the RiTa libary using the Penn tagset

Uses the Brill data set with a minimal subset of the original context-sensitive transformations (plus some custom additions.)

For more info see: Brill (1995) 'Unsupervised Learning of Disambiguation Rules for Part of Speech Tagging'

The full Penn tag set follows:

1. cc Coordinating conjunction
2. cd Cardinal number
3. dt Determiner
4. ex Existential there
5. fw Foreign word
6. in Preposition/subord. conjunction
7. jj Adjective
8. jjr Adjective, comparative
9. jjs Adjective, superlative
10. ls List item marker
11. md Modal
12. nn Noun, singular or mass
13. nns Noun, plural
14. nnp Proper noun, singular
15. nnps Proper noun, plural
16. pdt Predeterminer
17. pos Possessive ending
18. prp Personal pronoun
19. prp$ Possessive pronoun
20. rb Adverb
21. rbr Adverb, comparative
22. rbs Adverb, superlative
23. rp Particle
24. sym Symbol (mathematical or scientific)
25. to to
26. uh Interjection
27. vb Verb, base form
28. vbd Verb, past tense
29. vbg Verb, gerund/present participle
30. vbn Verb, past participle
31. vbp Verb, non-3rd ps. sing. present
32. vbz Verb, 3rd ps. sing. present
33. wdt wh-determiner
34. wp wh-pronoun
35. wp$ Possessive wh-pronoun
36. wrb wh-adverb
37. # Pound sign
38. $ Dollar sign
39. . Sentence-final punctuation
40. , Comma
41. : Colon, semi-colon
42. ( Left bracket character
43. ) Right bracket character
44. " Straight double quote
45. ` Left open single quote
46. " Left open double quote
47. ' Right close single quote
48. " Right close double quote
49. - Right close double quote

Field Summary

static boolean

PRINT_CUSTOM_TAGS

Method Summary

static BrillPosTagger	getInstance(processing.core.PApplet p) invisible deprecated public static BrillPosTagger getInstance() { return getInstance(null); }
boolean	isAdjective(java.lang.String pos) Returns true if word is an adjective.
boolean	isAdverb(java.lang.String pos) Returns true if word is an adverb.
boolean	isNoun(java.lang.String pos) Returns true if word is a noun.
boolean	isVerb(java.lang.String pos) Returns true if word is a verb.
java.lang.String[]	lookup(java.lang.String word)
static void	main(java.lang.String[] args)
java.lang.String	tag(java.lang.String word) Returns the part(s)-of-speech from the Penn tagset for a single word
java.lang.String[]	tag(java.lang.String[] words) Returns an array of parts-of-speech from the Penn tagset each corresponding to one word of input.
void	tag(java.lang.String[] words, java.util.List result) Returns an array of parts-of-speech from the Penn tagset each corresponding to one word of input.
java.lang.String[]	tagFile(java.lang.String fileName) Loads a file, splits the input into sentences and returns a String[] of the most probably tags.
java.lang.String	tagForWordNet(java.lang.String word) Tags the word (as usual) with a part-of-speech from the Penn tagset, then returns the corresponding part-of-speech for WordNet from the set { 'n', 'v', 'a', 'r' } as a String.
java.lang.String	tagInline(java.lang.String sentence) Returns a String with pos-tags notated inline
java.lang.String	tagInline(java.lang.String[] tokens) Returns a String with pos-tags notated inline
static void	tests(java.lang.String[] args)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

PRINT_CUSTOM_TAGS

public static final boolean PRINT_CUSTOM_TAGS

See Also:

Constant Field Values

Method Detail

getInstance

public static BrillPosTagger getInstance(processing.core.PApplet p)

invisible deprecated public static BrillPosTagger getInstance() { return getInstance(null); }

tagFile

public java.lang.String[] tagFile(java.lang.String fileName)

Loads a file, splits the input into sentences and returns a String[] of the most probably tags.

Specified by:

tagFile in interface RiTaggerIF

isVerb

public boolean isVerb(java.lang.String pos)

Description copied from interface: RiTaggerIF

Returns true if word is a verb.

Specified by:

isVerb in interface RiTaggerIF

isNoun

public boolean isNoun(java.lang.String pos)

Description copied from interface: RiTaggerIF

Returns true if word is a noun.

Specified by:

isNoun in interface RiTaggerIF

isAdverb

public boolean isAdverb(java.lang.String pos)

Description copied from interface: RiTaggerIF

Returns true if word is an adverb.

Specified by:

isAdverb in interface RiTaggerIF

isAdjective

public boolean isAdjective(java.lang.String pos)

Description copied from interface: RiTaggerIF

Returns true if word is an adjective.

Specified by:

isAdjective in interface RiTaggerIF

tag

public java.lang.String tag(java.lang.String word)

Returns the part(s)-of-speech from the Penn tagset for a single word

Parameters:

word - String

Returns:

String (or String[])

See Also:

tag(String[])

tagForWordNet

public java.lang.String tagForWordNet(java.lang.String word)

Tags the word (as usual) with a part-of-speech from the Penn tagset, then returns the corresponding part-of-speech for WordNet from the set { 'n', 'v', 'a', 'r' } as a String.

Parameters:

word -

See Also:

tag(java.lang.String)

tag

public void tag(java.lang.String[] words,
                java.util.List result)

Returns an array of parts-of-speech from the Penn tagset each corresponding to one word of input.

Parameters:

words - String[]

tag

public java.lang.String[] tag(java.lang.String[] words)

Returns an array of parts-of-speech from the Penn tagset each corresponding to one word of input.

Specified by:

tag in interface RiTaggerIF

Parameters:

words - String[]

Returns:

String[]

lookup

public java.lang.String[] lookup(java.lang.String word)

tagInline

public java.lang.String tagInline(java.lang.String[] tokens)

Returns a String with pos-tags notated inline

Specified by:

tagInline in interface RiTaggerIF

tagInline

public java.lang.String tagInline(java.lang.String sentence)

Description copied from interface: RiTaggerIF

Returns a String with pos-tags notated inline

Specified by:

tagInline in interface RiTaggerIF

tests

public static void tests(java.lang.String[] args)

Invisible:

main

public static void main(java.lang.String[] args)