open source software or perl module for text analysis

Hi! Does anyone have experimence on open source software or any perl module for text analysis? This program should be able to extract the meaning of text documents, key phrase, or key words by given text paragraphs. Any suggestion is appreciated. Xiaorong ___

WordNet perl modules

Hi! This is Xiaorong working in the University of Notre Dame Library. There are two perl modules for WordNet: 1. WordNet-QueryData-1.37 written by Dan Brian 2. Lingua-Wordnet written byJason Rennie Does any one have any experimence on these two modules? Which one do you think is better? Thanks