rita.support.me
Class MaxEntChunker

java.lang.Object
  rita.RiObject
      rita.support.remote.RiRemotable
          rita.support.me.RiObjectME
              rita.support.me.MaxEntChunker

All Implemented Interfaces:

processing.core.PConstants, RiChunkerIF, RemoteConstants, RiConstants

public class MaxEntChunker
extends RiObjectME
implements RiChunkerIF

Simple chunker that finds non-recursive syntactic 'chunks' such as noun-phrases, using the Penn conventions (shown below).

• adjp adjective phrase
• advp adverb phrase
• conjp conjunction phrase
• intj interjection
• lst list marker
• np noun phrase
• pp prepositional phrase
• prt particle
• sbar clause introduced by a subordinating conjunction
• ucp unlike coordinated phrase
• vp verb phrase
• o independent phrase

Primarily just a wrapper for the OpenNLP(http://opennlp.sourceforge.net) chunker with some minor modifications/simplifications.

For more info see: Berger & Della Pietra's paper: 'A Maximum Entropy Approach to Natural Language Processing', which provides a good introduction to the maxent framework.

Field Summary

static java.lang.String	ADJ_PHRASE
static java.lang.String	ADV_PHRASE
static java.lang.String	IND_PHRASE
static java.lang.String	NOUN_PHRASE
static java.lang.String	PREP_PHRASE
static java.lang.String	PRT_PHRASE
static java.lang.String	SBAR_PHRASE
static java.lang.String	VERB_PHRASE

Fields inherited from class rita.support.me.RiObjectME

ERROR_MSG, LOAD_FROM_MODEL_DIR

Fields inherited from interface rita.support.remote.RemoteConstants

ARG_DELIM, ARR_DELIM, CHUNKER, DELIM, FS, LB, LP, MARKOV, PARSER, QQ, RB, RP, SPC, TAGGER, TYPE_DELIM

Fields inherited from interface rita.support.RiConstants

BEHAVIOR_COMPLETED, BOUNDING_BOX_ALPHA, BRILL_POS_TAGGER, EASE_IN, EASE_IN_CUBIC, EASE_IN_EXPO, EASE_IN_OUT, EASE_IN_OUT_CUBIC, EASE_IN_OUT_EXPO, EASE_IN_OUT_QUARTIC, EASE_IN_OUT_SINE, EASE_IN_QUARTIC, EASE_IN_SINE, EASE_OUT, EASE_OUT_CUBIC, EASE_OUT_EXPO, EASE_OUT_QUARTIC, EASE_OUT_SINE, ESS, FADE_COLOR, FADE_IN, FADE_OUT, FADE_TO_TEXT, FIRST_PERSON, FUTURE_TENSE, ID, LERP, LINEAR, MAXENT_POS_TAGGER, MINIM, MOVE, MUTABLE, PAST_TENSE, PHONEME_BOUNDARY, PHONEMES, PLING_STEMMER, PLURAL, PORTER_STEMMER, POS, PRESENT_TENSE, SCALE_TO, SECOND_PERSON, SENTENCE_BOUNDARY, SINGULAR, SONIA, SPEECH_COMPLETED, STRESSES, SYLLABLE_BOUNDARY, SYLLABLES, TEXT, TEXT_ENTERED, THIRD_PERSON, TIMER, TIMER_COMPLETED, TIMER_TICK, TOKENS, UNKNOWN, WORD_BOUNDARY

Fields inherited from interface processing.core.PConstants

A, AB, ADD, AG, ALPHA, ALPHA_MASK, ALT, AMBIENT, AR, ARC, ARGB, ARROW, B, BACKSPACE, BASELINE, BEEN_LIT, BEVEL, BLEND, BLUE_MASK, BLUR, BOTTOM, BOX, BURN, CENTER, CENTER_DIAMETER, CENTER_RADIUS, CHATTER, CLOSE, CMYK, CODED, COMPLAINT, CONTROL, CORNER, CORNERS, CROSS, CUSTOM, DA, DARKEST, DB, DEG_TO_RAD, DELETE, DG, DIAMETER, DIFFERENCE, DILATE, DIRECTIONAL, DISABLE_ACCURATE_TEXTURES, DISABLE_DEPTH_SORT, DISABLE_DEPTH_TEST, DISABLE_OPENGL_2X_SMOOTH, DISABLE_OPENGL_ERROR_REPORT, DODGE, DOWN, DR, DXF, EB, EDGE, EG, ELLIPSE, ENABLE_ACCURATE_TEXTURES, ENABLE_DEPTH_SORT, ENABLE_DEPTH_TEST, ENABLE_NATIVE_FONTS, ENABLE_OPENGL_2X_SMOOTH, ENABLE_OPENGL_4X_SMOOTH, ENABLE_OPENGL_ERROR_REPORT, ENTER, EPSILON, ER, ERODE, ERROR_BACKGROUND_IMAGE_FORMAT, ERROR_BACKGROUND_IMAGE_SIZE, ERROR_PUSHMATRIX_OVERFLOW, ERROR_PUSHMATRIX_UNDERFLOW, ERROR_TEXTFONT_NULL_PFONT, ESC, EXCLUSION, G, GIF, GRAY, GREEN_MASK, HALF_PI, HAND, HARD_LIGHT, HINT_COUNT, HSB, IMAGE, INVERT, JAVA2D, JPEG, LEFT, LIGHTEST, LINE, LINES, LINUX, MACOSX, MAX_FLOAT, MAX_INT, MIN_FLOAT, MIN_INT, MITER, MODEL, MULTIPLY, NORMAL, NORMALIZED, NX, NY, NZ, OPAQUE, OPEN, OPENGL, ORTHOGRAPHIC, OTHER, OVERLAY, P2D, P3D, PATH, PDF, PERSPECTIVE, PI, platformNames, POINT, POINTS, POLYGON, POSTERIZE, PROBLEM, PROJECT, QUAD, QUAD_STRIP, QUADS, QUARTER_PI, R, RAD_TO_DEG, RADIUS, RECT, RED_MASK, REPLACE, RETURN, RGB, RIGHT, ROUND, SA, SB, SCREEN, SG, SHAPE, SHIFT, SHINE, SOFT_LIGHT, SPB, SPG, SPHERE, SPOT, SPR, SQUARE, SR, SUBTRACT, SW, TAB, TARGA, THIRD_PI, THRESHOLD, TIFF, TOP, TRIANGLE, TRIANGLE_FAN, TRIANGLE_STRIP, TRIANGLES, TWO_PI, TX, TY, TZ, U, UP, V, VERTEX_FIELD_COUNT, VW, VX, VY, VZ, WAIT, WHITESPACE, WINDOWS, X, Y, Z

Constructor Summary

MaxEntChunker()

MaxEntChunker(processing.core.PApplet p)

Method Summary

java.lang.String	chunk(java.util.List words, java.util.List postags) Returns a String of chunks inline
java.lang.String	chunk(java.lang.String[] words, java.lang.String[] tags) Returns a String of chunks inline
static MaxEntChunker	createRemote(java.util.Map params)
void	destroy()
java.lang.String[]	getAdjPhrases()
java.lang.String[]	getAdvPhrases()
java.lang.String[]	getChunkData()
static MaxEntChunker	getInstance()
static MaxEntChunker	getInstance(processing.core.PApplet p)
java.lang.String[]	getNounPhrases()
java.lang.String[]	getPrepPhrases()
java.lang.String[]	getVerbPhrases()
static void	main(java.lang.String[] args)
java.lang.String	tagAndChunk(java.lang.String sentence) Utility method that uses the default word tokenizer & pos-tagger to prepare a sentence for chunking, then returns the sentence String w' chunk-data inline

Methods inherited from class rita.support.me.RiObjectME

getModelDir, setModelDir

Methods inherited from class rita.RiObject

dispose, getId, getPApplet, nextId

Methods inherited from class java.lang.Object

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

Field Detail

NOUN_PHRASE

public static final java.lang.String NOUN_PHRASE

See Also:

Constant Field Values

VERB_PHRASE

public static final java.lang.String VERB_PHRASE

See Also:

Constant Field Values

PREP_PHRASE

public static final java.lang.String PREP_PHRASE

See Also:

Constant Field Values

SBAR_PHRASE

public static final java.lang.String SBAR_PHRASE

See Also:

Constant Field Values

ADJ_PHRASE

public static final java.lang.String ADJ_PHRASE

See Also:

Constant Field Values

ADV_PHRASE

public static final java.lang.String ADV_PHRASE

See Also:

Constant Field Values

PRT_PHRASE

public static final java.lang.String PRT_PHRASE

See Also:

Constant Field Values

IND_PHRASE

public static final java.lang.String IND_PHRASE

See Also:

Constant Field Values

Constructor Detail

MaxEntChunker

public MaxEntChunker()

MaxEntChunker

public MaxEntChunker(processing.core.PApplet p)

Method Detail

getInstance

public static MaxEntChunker getInstance()

getInstance

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

createRemote

public static MaxEntChunker createRemote(java.util.Map params)

chunk

public java.lang.String chunk(java.util.List words,
                              java.util.List postags)

Description copied from interface: RiChunkerIF

Returns a String of chunks inline

Specified by:

chunk in interface RiChunkerIF

getNounPhrases

public java.lang.String[] getNounPhrases()

Specified by:

getNounPhrases in interface RiChunkerIF

getVerbPhrases

public java.lang.String[] getVerbPhrases()

Specified by:

getVerbPhrases in interface RiChunkerIF

getPrepPhrases

public java.lang.String[] getPrepPhrases()

Specified by:

getPrepPhrases in interface RiChunkerIF

getAdjPhrases

public java.lang.String[] getAdjPhrases()

Specified by:

getAdjPhrases in interface RiChunkerIF

getAdvPhrases

public java.lang.String[] getAdvPhrases()

Specified by:

getAdvPhrases in interface RiChunkerIF

chunk

public java.lang.String chunk(java.lang.String[] words,
                              java.lang.String[] tags)

Description copied from interface: RiChunkerIF

Returns a String of chunks inline

Specified by:

chunk in interface RiChunkerIF

tagAndChunk

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

Utility method that uses the default word tokenizer & pos-tagger to prepare a sentence for chunking, then returns the sentence String w' chunk-data inline

Specified by:

tagAndChunk in interface RiChunkerIF

Parameters:

sentence -

getChunkData

public java.lang.String[] getChunkData()

Specified by:

getChunkData in interface RiChunkerIF

destroy

public void destroy()

Specified by:

destroy in class RiRemotable

main

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