The scope of the Cross Gateway Retrieve Imaging Document Set transaction is semantically the same as the Retrieve Imaging Document Set transaction [RAD-69]. Differences from the Retrieve Imaging Document Set transactions are:
- The Cross Gateway Retrieve Imaging Document Set is between an Initiating Imaging Gateway and a Responding Imaging Gateway
- The ‘homeCommunityId’ parameter is required.  This means that the homeCommunityId parameter which is conditionally required on the Retrieve Imaging Document Set transaction is required by this transaction
- The Responding Imaging Gateway is required to support Asynchronous Web Services Exchange on the Cross Gateway Retrieve Imaging Document Set