Which item defines relationships between master files in Epic?

The item that defines relationships between master files in Epic is networking. In Epic's system, master files represent primary data structures such as patients, providers, and locations, and the relationships between these entities are established through networking. Networking allows different master files to communicate with each other, ensuring that data is consistent and accessible across the system.

By defining these relationships, networking facilitates integrated workflows, data sharing, and the overall functionality of the Epic platform. This connectivity is essential for ensuring that various components of the healthcare management system work together seamlessly, which is crucial for effective patient care and administrative efficiency.