This document discusses using a master data management approach to develop a metadata repository in healthcare. It defines metadata and master data, and explains how master data management can be used to harmonize and manage core business data consistently across an organization. Developing a metadata repository involves defining requirements, contents, governance processes and change management procedures. The repository would store both master data and corresponding metadata in a single location for consistent management. This approach prioritizes the most important clinical and administrative data and allows an organization to systematically develop a comprehensive metadata repository over multiple years.