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.