In the sandbox at http://lucene.apache.org/java/docs/lucene-sandbox/
There is a link to the WordNet repository: http://svn.apache.org/repos/asf/lucene/java/trunk/contrib/WordNet it should be: http://svn.apache.org/repos/asf/lucene/java/trunk/contrib/wordnet Where "wordnet" is not capitalized. Just wanted to let someone know.