edu.washington.cs.knowitall.nlp
Class OpenNlpUtils

java.lang.Object
  edu.washington.cs.knowitall.nlp.OpenNlpUtils

public class OpenNlpUtils
extends Object

A class of static methods for handling OpenNLP formats.

Author:

afader

Field Summary

static String	IN_CHUNK
static String	IN_NP
static String	OUT
static String	POS
static String	START_CHUNK
static String	START_NP

Constructor Summary

OpenNlpUtils()

Method Summary

static void	attachOfs(String[] tokens, String[] npChunkTags) Modifies npChunkTags so that NP chunks starting with "of" are merged with the previous NP chunk.
static void	attachPossessives(String[] posTags, String[] npChunkTags) Modifies the npChunkTags so that NP chunks starting with a possessive 's are merged with the previous NP chunk.
static List<edu.washington.cs.knowitall.commonlib.Range>	computeChunkRanges(String[] tags, String name)
static List<edu.washington.cs.knowitall.commonlib.Range>	computeNpChunkRanges(List<String> npChunkTags) A wrapper to support passing Lists.
static List<edu.washington.cs.knowitall.commonlib.Range>	computeNpChunkRanges(String[] npChunkTags)
static void	detatchOfs(String[] tokens, String[] npChunkTags)
static void	detatchPossessives(String[] posTags, String[] npChunkTags)
static boolean	isChunkBeginTag(String tag, String chunk)
static boolean	isChunkInTag(String tag, String chunk)
static boolean	isInNpChunk(String s)
static boolean	isNpBeginTag(String s)
static boolean	isNpInTag(String s)
static boolean	isPossessive(String s)

Methods inherited from class java.lang.Object

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

Field Detail

START_CHUNK

public static final String START_CHUNK

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Constant Field Values

IN_CHUNK

public static final String IN_CHUNK

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Constant Field Values

START_NP

public static final String START_NP

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Constant Field Values

IN_NP

public static final String IN_NP

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Constant Field Values

POS

public static final String POS

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Constant Field Values

OUT

public static final String OUT

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Constant Field Values

Constructor Detail

OpenNlpUtils

public OpenNlpUtils()

Method Detail

isChunkBeginTag

public static boolean isChunkBeginTag(String tag,
                                      String chunk)

isChunkInTag

public static boolean isChunkInTag(String tag,
                                   String chunk)

isNpBeginTag

public static boolean isNpBeginTag(String s)

isNpInTag

public static boolean isNpInTag(String s)

isPossessive

public static boolean isPossessive(String s)

isInNpChunk

public static boolean isInNpChunk(String s)

computeChunkRanges

public static List<edu.washington.cs.knowitall.commonlib.Range> computeChunkRanges(String[] tags,
                                                                                   String name)

Parameters:

tags -

name -

Returns:

list of Range objects representing the ranges of the chunks of type name in the sentence.

computeNpChunkRanges

public static List<edu.washington.cs.knowitall.commonlib.Range> computeNpChunkRanges(String[] npChunkTags)

Parameters:

npChunkTags -

Returns:

the Ranges of the NP chunks in the given npChunkTags.

computeNpChunkRanges

public static List<edu.washington.cs.knowitall.commonlib.Range> computeNpChunkRanges(List<String> npChunkTags)

A wrapper to support passing Lists.

Parameters:

npChunkTags -

Returns:

attachOfs

public static void attachOfs(String[] tokens,
                             String[] npChunkTags)

Modifies npChunkTags so that NP chunks starting with "of" are merged with the previous NP chunk.

Parameters:

tokens -

npChunkTags -

detatchOfs

public static void detatchOfs(String[] tokens,
                              String[] npChunkTags)

attachPossessives

public static void attachPossessives(String[] posTags,
                                     String[] npChunkTags)

Modifies the npChunkTags so that NP chunks starting with a possessive 's are merged with the previous NP chunk.

Parameters:

posTags -

npChunkTags -

detatchPossessives

public static void detatchPossessives(String[] posTags,
                                      String[] npChunkTags)