What is typically contained within a "data dictionary"?

A data dictionary is a comprehensive reference guide that describes the structure, attributes, and relationships of the data used in a given system or application. This includes detailed information about data elements such as their names, types, formats, allowable values, and any relationships to other data elements. By providing this level of detail, a data dictionary serves as a valuable resource for data management, facilitating data governance, and ensuring consistency across various datasets.

In contrast, while algorithms used for data analysis and user access levels and permissions are important aspects of data management, they do not fall under the scope of what a data dictionary specifically describes. Additionally, foreign keys and primary keys, while relevant to understanding data relationships within a database, represent only a subset of data elements and do not encompass the full range of information typically found in a data dictionary. Hence, the choice that captures the essence of a data dictionary is the one that emphasizes detailed information about data elements.