Functions Involved of Information Retrieval System

1. The information is created and acquired for the system
2. Knowledge records are analyze and tagged by set of index terms.
3. The knowledge records are stored physically and index terms are stored into a structured file.
4. The user's query is tagged with sets of index terms and then is matched against tagged records.
5. Matched documents are stored for review.
                6. Feedback may lead to several reiteration of the search.