What is a primary function of a data dictionary in database management?

The primary function of a data dictionary in database management is to create an inventory of data contained in the database. A data dictionary serves as a centralized repository for metadata, which includes comprehensive details about the data elements within the database. This inventory encompasses various characteristics, such as data types, data formats, and relationships among data elements, enabling users and administrators to understand the structure and organization of the database effectively.

By providing this organized overview, the data dictionary facilitates data management tasks, ensures data integrity, and supports consistent usage of the database. It is an essential tool for database designers, developers, and users, as it helps in data retrieval, usage, and maintenance.