controlled indexing with Lucene

[Amir Hossein Jadidinejad <am...@yahoo.com>]

Hi, 
I'm going to index some documents only with known phrases. Let me describe:  

Suppose that I have a controlled vocabulary of phrases (A list of some candidate phrases). I intend to
index ONLY these phrases within my documents and have a retrieval model
(for example simple VS-TF.IDF) that each index item is a predefined
phrase.  

Could anyone tell me how to do it with Lucene?   

Greatly appreciate any comment or answer.
Kind regards.