Hi Farhan, you can try out the WordNet extension available via the update manager.

Here are the url that may be help you

http://rapid-i.com/rapidforum/index.php?topic=6035.0

http://stackoverflow.com/questions/14199980/how-to-connect-sentiwordnet-to-rapidminer

Wahyu, thanks for your reply. Actually, SentiWordNet is different from WordNet. Both the URLs that you have provided are unresolved questions.

Still waiting for replies.

Think SentiWordNet can provide the corpus from which a document vector can be produced, and RapidMiner can then perform the classification task?

Yes. Trying to implement that.