FHIR query/response transaction

...recently, the ONC Interoperability Roadmap, recognizing that the building blocks of universal interoperability could not be so neatly erected, leans on the idea of “coordinated governance” of networks. While these frameworks have paid homage to the concept of nationwide network as a “network of networks”, we have yet to crisply define the stitching needed to form this nationwide network quilt. This issue hasn’t been so pressing up until now because there were relatively few networks – the “last mile” problem was the bigger concern. Network formation is evolving rapidly, however, which has made more pressing the question of what it means to connect networks in a uniform way.