Database design, and information storage and retrieval

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ICT for Library and Information Professionals: A Training Package for Developing Countries Student’s Guide Field Definition table : A table defining the fields of a given database Field Select Table : A table defining criteria for extracting one or more elements from a Master file record required for a particular process. Field Select Tables may be used for defining the contents of the Inverted file, for sorting records before producing a printed report or to reformat records during an import or export operation Filing information : A special coding inserted in a field defining how it must be sorted FST : see Field Select Table Function key : see Control key Gizmo : A special encoding of accented characters or other special characters used for the exchange of data between the various versions of CDS/ISIS. A gizmo represents a single character and consists of three characters, the first of which is always an @ sign and the next two define the character being represented. By providing gizmo conversion tables at each end, two users are able to transmit and receive correctly characters having different machine codes. Hit : A record satisfying a set of specific search criteria Hit file : A file created by CDS/ISIS to sort Master file records Hit list : The set of records retrieved by a given search expression Hyperlink: Can be either graphics or text that is coloured or underlined. A hyperlink is represented by a "hot" image or display text that the user clicks to go to a different location. The location can be on your hard disk, on your organization’s intranet, or on the Internet, such as a page on the World Wide Web. You can insert hyperlinks that go to a different document, Web page or to an e-mail address. You can even use hyperlinks to go to multimedia files, such as files containing sounds and videos. Import : The conversion of a database from the form suitable for transmission to other users or systems to the form required by CDS/ISIS for processing Module 4: Database Design, and Information Storage and Retrieval: Glossary Page 57 of 59
ICT for Library and Information Professionals: A Training Package for Developing Countries Student’s Guide Indexing : The process of extracting search terms from a Master file record Inverted file : A logical structure built automatically by CDS/ISIS to enable fast retrieval. It contains the dictionary of search terms and, for each term, a list of references to the Master file records from which the term was extracted. The Inverted file actually consists of six physical files ISO : International Organization for Standardization ISO 2709 : An international standard format for information interchange recommended by ISO Language : see Dialog language Limits : see MFN limits Link file : A file built by CDS/ISIS during the process of creating the Inverted file Master file : A logical structure containing the records of a given database. The Master file actually consists of two physical files MFN : (Master File Number) the unique number automatically assigned by CDS/ISIS to each record entered in a database. MFNs are assigned sequentially, starting from 1, and represent the chronological order of entry MFN limits : A range of MFNs, e.g. 1/50, defining the Master file records to which a certain operation is applied Mode : see Display mode Occurrence : One instance of a repeatable field Paste : see Cut and paste Pattern : A character by character description of the possible contents of a field. A pattern defines, for each position of the field, the type of characters it may contain (e.g. alphabetic, numeric) Print format : see Format Qualifier : A construct used, during searching, to specify the field or fields in which a given search term should appear Record (Master file) : The set of fields containing all the data elements of one information unit stored in a database Module 4: Database Design, and Information Storage and Retrieval: Glossary Page 58 of 59
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3. Learning Environment The minimum
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Database design, and information storage and retrieval

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