A database about data and databases. A data dictionary holds the name, type, range of values, source and authorization for access for each data element in the organization's files and databases.

A data dictionary is divided logically into areas. The information is organized into entity types, which correspond to the main data processing components, such as elements, records, files, programs, ...

Data administration includes the development of data models and data dictionaries ... administration deals with the implementation of the types of databases that are in use.