From the HL7 FHIR website: "FHIR is a technical specification, which web–centric technical people understand easily. However the presentation is totally technology centric, and if you aren’t a technical person who understands web technologies, then it’s not obvious what FHIR is or how it works. But you don’t need to know the web side of the technology – the concepts underlying FHIR are really quite straight forward. This page explains the how systems interact with FHIR (which we call the Application Programming Interface – API) using a simple analogy, and if you get this, then you understand it enough to go off and review what really matters to clinicians – the clinical content of the resources.

From the Caristix Website: "HL7 interfacing – you can’t live without it but that doesn’t mean you have to suffer as you work to connect the systems that make your environment hum along. This guide will help you get a firm grasp on all the challenges, standards, and choices you need to make along the way, whether you’re developing interfaces on your own or working with a third party."