What is the function of a data dictionary in design?

The function of a data dictionary in design is to offer definitions of data elements. A data dictionary serves as a centralized repository that contains metadata about the data in a project. This includes definitions of various data elements, their types, formats, constraints, and relationships with other data elements. By providing clear definitions, a data dictionary ensures that all stakeholders have a common understanding of the data being used, which is essential for effective communication, data integrity, and consistency throughout the development process.

Having a well-structured data dictionary also facilitates data management and governance, as it helps in tracking what each piece of data means and how it should be used, thereby enhancing the overall design and functionality of the data system.