Figure 1. HealthShare architecture. In this example, data flows from clinical and lab systems to Edge Cache Repositories as updates occur in those departmental systems. As new patients are added at the participating organizations, they are entered into the EMPI at the Hub, which keeps track of which Gateways contain information for each patient. Physicians at the group practice (and elsewhere) use the HealthShare EPR to see a consolidated, organized, episode­of­care­based picture of their patients’ medical history.