Ranking Techinques Implemented
- Term Frequency
- Term Frequency Inverse Document frequency
- Boolean Ranking
- Pseudo Relevance Feedback
https://github.com/nating/lucene-search-engine/
https://stackoverflow.com/questions/15708439/implement-feedback-in-lucene
https://stackoverflow.com/questions/8776794/how-to-extract-document-term-vector-in-lucene-3-5-0