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 ({@link SynExpand#expand SynExpand.expand(...)}). This has been tested with WordNet 2.0. The index has fields named "word" ({@link #F_WORD}) and "syn" ({@link #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 {@link org.apache.lucene.document.Document#getValues}

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 StringF_SYN
static StringF_WORD
Method Summary
static voidmain(String[] args)
Takes arg of prolog file name and index directory.

Field Detail

F_SYN

public static final String F_SYN

F_WORD

public static final String F_WORD

Method Detail

main

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