Web Information Retrieval Models Techniques and Issues: Survey

The main objective of information retrieval models is to searching and retrieving information from databases and provides users with that information which satisfy their needs. There are various information retrieval models have been developed till now. All these models are categorized based on their characteristics. To compute the efficiency of information retrieval model, we require a database of documents, detailed description suite of user needs expressible as queries and accurate assessment of each query-document pair. The information retrieval models have been used to judge effectiveness of information retrieval systems and considered a baseline for search engines evaluation. This paper focuses main feature of IR models and provides a comparison of these models.