org.apache.lucene.wordnet

Class Syns2Index


public class Syns2Index
extends Object

Convert the prolog file wn_s.pl from the WordNet prolog download into a Lucene index suitable for looking up synonyms and performing query expansion (SynExpand.expand(...)). This has been tested with WordNet 2.0. The index has fields named "word" (F_WORD) and "syn" (F_SYN).

The source word (such as 'big') can be looked up in the "word" field, and if present there will be fields named "syn" for every synonym. What's tricky here is that there could be multiple fields with the same name, in the general case for words that have multiple synonyms. That's not a problem with Lucene, you just use Document.getValues(String)

While the WordNet file distinguishes groups of synonyms with related meanings we don't do that here. This can take 4 minutes to execute and build an index on a "fast" system and the index takes up almost 3 MB.

Author:
Dave Spencer, dave@searchmorph.com
See Also:
WordNet home page, prologdb man page, sample site that uses it

Field Summary

static String
F_SYN
static String
F_WORD

Method Summary

static void
main(String[] args)
Takes arg of prolog file name and index directory.

Field Details

F_SYN

public static final String F_SYN

F_WORD

public static final String F_WORD

Method Details

main

public static void main(String[] args)
            throws Throwable
Takes arg of prolog file name and index directory.

Copyright © 2000-2007 Apache Software Foundation. All Rights Reserved.