The Master & Reference Data Management (MRDM) domain is structured across the three dimensions of Plan, Implement, and Operate, and includes five controls and sixteen specifications, with some specifications divided into two or more specifications depending on the capability: Foundational, Advanced, or Very Advanced. Master & Reference Data Management is a domain within data management that focuses on the governance, storage, and maintenance of critical data entities known as master data and reference data. Master data represents the core business domains such as customers, products, and employees, while reference data consists of standardized codes, classifications, or lists used to categorize and describe data elements. This domain involves establishing processes, standards, and tools for ensuring the accuracy, consistency, and integrity of master and reference data across the Entity.