What is the function of a data dictionary?

The function of a data dictionary is best described as a centralized repository of definitions and metadata about data elements in a database. A data dictionary serves to provide detailed information about the structure of the database, including the meanings of data elements, their data types, relationships between elements, constraints, and other important metadata. This allows users and developers to understand the data better, ensures consistent use of the data across applications, and aids in data management practices.

This centralization of information is crucial for effective database administration and design, allowing for effective communication among users, ensuring data integrity, and facilitating easier data governance. With clear definitions and relationships documented in the data dictionary, organizations can manage their data assets more efficiently and reduce inaccuracies and misunderstandings related to data usage.