What is a key attribute of an extension in the Epic system?

The key attribute of an extension in the Epic system, which aligns with the selected answer, is that it performs various activities, including error checking. Extensions in Epic are designed to enhance or add functionality to the existing system in a way that supports the user’s workflow. They can automate routine tasks, ensure data integrity, and help in validation processes, such as error checking when users input data. This capability is essential as it helps maintain a high standard of data quality and efficiency within the system.

This attribute distinguishes extensions from other functionalities within Epic that may have more limitations or serve narrower purposes. For example, while some options may imply user customization or specific restrictions, the ability to perform a range of activities, particularly error checking, encompasses a broader spectrum of utility that aligns with the operational goals of the Epic system.