I'm going to index some documents only with known phrases. Let me describe:  
Suppose that I have a controlled vocabulary(a list of some known phrases/words). I intend to index ONLY these phrases within my documents and have a retrieval model (for example simple VS-TF.IDF). In way, each index item is one of the predefined phrase.
Is it possible to handle this situation with Lucene?
What is the best way?!
Greatly appreciate any comments or answers.
Kind regards,
-Amir Hossein