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Unformatted text preview: Analysis Exercises: Pg. 37, #1 Understanding the information system Q1 . Understanding the Information System A library information system is a register of all bibliographic items found in a library or group of libraries at several locations. A bibliographic item can be any information entity that is considered library material, or a group of library materials, or linked from the catalog as far as it is relevant to the users of the library. (“Library catalog”, 2011, “Definition,” para. 1). Input, Processing, Output, Control and Storage Typical input would be in the form keying in data about materials or patrons into the library’s database. Data about the material – title, author, category, subject, type of material, ISBN, etc., or data about the patron – name, address, date of birth, telephone number, etc., are entered into the system and used as key identifiers to retrieve materials. Processing occurs when a patron or librarian needs to retrieve information from the database. Using one or several key identifiers, the database is parsed and the search terms are referenced with information previously keyed into the system. The results of the search are either displayed on the screen or printed on paper. The information may help the librarian to locate materials that are stored in the library’s catalog or find information about patrons. Control is maintained at several instances throughout the entire process. First, when keying in data about materials or patrons, each field in which data is entered has contains some form control variable – fields that validates input based on a certain criteria. This maintains the correctness of the data that is being input. Similarly, during a search of the database, the search fields contain validators and accept only certain identifiers to be searched. All the data that input in the system is stored in one central repository, or database. The database has several related tables – catalog data, patron information, transaction data, all of which contain separate data but the data are used to generate rich reports that help librarians or patrons to complete their daily tasks. that help librarians or patrons to complete their daily tasks....
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- Winter '11
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