One thing I would be interested in is a simple way of running queries on a combination of linked Demographic/MPI and EHR data. For example: list all patients with breast cancer diagnosis of a certain type registered in the EHR that also have a biological mother with a breast cancer diagnosis registered in the EHR.
Perhaps simething like AGQL hinted at in EHRs with different system_id in the same server? - #37 by erik.sundvall