An analyst needs to know what data an organization possesses.

Adata dictionaryis a comprehensive document that describes all the data elements in an organization’s databases, including field names, types, allowed values, and relationships. It is the definitive resource for understanding what data is available and how it is structured.

CompTIA Data+ Reference:

CompTIA Data+ Study Guide (Exam DA0-001), Chapter 6: Data Governance, Quality, and Controls, Section “Documenting Data Assets: Data Dictionaries”, Official CompTIA CertMaster Learn for Data+, Module 6.2 “Data Dictionaries”.