Please update the definition of HRP in Sandbox documentation to add/clarify the storage role of the HRP.
Health repository
A health repository is the connector or bridge through which any HIU or HIP can connect to the network. The health repository allows HIPs and HIUs to access patient data for a specific period of time. The sandbox environment provides a basic HIU system, representing a doctor’s interface. The sandbox environment also provides a mock HIP system using which you can test linkages and access to health information from multiple sources.