| data dictionary A data structure that stores , i.e. data about . The term "data dictionary" has several uses. Most generally it is a set of that can be shared by several applications. Usually it means a in a that stores the names, , length, and other characteristics of the fields in the database tables. An active data dictionary is automatically updated as changes occur in the database. A passive data dictionary must be manually updated. In a , this functionality is performed by the . The data dictionary is a more general software utility used by designers, users, and administrators for . The data dictionary may maintain information on system hardware, software, documentation, users, and other aspects. Data dictionaries are also used to document the database design process itself and can accumulate meta-data ready to feed into the system catalog. (1999-04-27) |
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