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What is Information Retrieval?

What is Information Retrieval?. A process of recovering specific pieces of information from the stored data. It is a system for organizing knowledge for subject retrieval. The phrase Information Storage and Retrieval (ISR) is of recent origin, coined by Calvin Moores.

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What is Information Retrieval?

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  1. What is Information Retrieval? A process of recovering specific pieces of information from the stored data. It is a system for organizing knowledge for subject retrieval. The phrase Information Storage and Retrieval (ISR) is of recent origin, coined by Calvin Moores. According to Moore, ISR is ‘Searching and Retrieval of information from a storage according to specification by subject. According to Lancaster, Activities involved in searching a body of literature in order t o find items (documents that deal with a particular subject area. 17 Aug 2010

  2. COMPONENTS OF I S R SYSTEMS , ISR system components are: Documents Requests Short description of : a) Documents b) Requests Mechanisms to allow matching of the descriptors and people. Broadly

  3. The three major components of ISR systems are: • Document sub system (Items of Information) • Users Subsystem (Users Queries) • Searching Subsystem (Matching of Users queries with document database)

  4. Problems of I R are: • Texts may not be perfect representations of messages of authors • The representations of texts may not be also perfect • Requests are rarely perfect representations of information needs • Search statements may not be perfect representations of requests • The frame of reference of requester may not coincide with the frame of reference of reference of authors • IR problem is essentially matching approximations of information needs with approximations of messages

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