# Package org.apache.lucene.wordnet

This package uses synonyms defined by WordNet to build a Lucene index storing them, which in turn can be used for query expansion.

See: Description

- Class Summary
  Class | Description
  --- | ---
  SynExpand | Expand a query by looking up synonyms for every term.
  SynLookup | Test program to look up synonyms.
  Syns2Index | 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(...)`).

## Package org.apache.lucene.wordnet Description

This package uses synonyms defined by WordNet to build a Lucene index storing them, which in turn can be used for query expansion. You normally run `Syns2Index` once to build the query index/"database", and then call `SynExpand.expand(...)` to expand a query.

### Instructions

1. Download the WordNet prolog database , gunzip, untar etc.
2. Invoke Syn2Index as appropriate to build a synonym index. It'll take 2 arguments, the path to wn_s.pl from that WordNet download, and the index name.
3. Update your UI so that as appropriate you call SynExpand.expand(...) to expand user queries with synonyms.

Copyright © 2000-2016 Apache Software Foundation. All Rights Reserved.