What is a Data Dictionary used for?

A Data Dictionary is indeed used to provide information about the structure of a database. It serves as a centralized repository that contains metadata, or data about data, which describes the various elements within a database, such as tables, fields, data types, relationships, constraints, and other schema-related information. This allows developers, database administrators, and users to understand how the database is organized and how to interact with it effectively.

By having a detailed overview of the database structure, one can ensure consistency in data entry, accurately interpret queries, and facilitate maintenance tasks. It is a crucial tool for keeping track of how data is organized and how different pieces of information relate to one another, enhancing overall data integrity and usability.

In contrast, storing actual user data pertains to the core database itself, while enforcing data security measures and managing user permissions are functionalities associated with database management systems and would not specifically describe the purpose of a Data Dictionary.