Abstract
In 2011, Australian HL7 standards guru, Grahame Grieve, proposed a new interoperability approach he called “Resources for Health (RFH)”. He said it would define a set of objects to represent granular clinical concepts for use on their own or aggregated into complex documents. As a result, it would be ‘composable’—so that, unlike with complex C-CDA documents, developers could request only the information needed for their particular use case. In part, because of that, he said that this flexibility could offer “coherent solutions for a range of interoperability problems”. Today, renamed Fast Healthcare Interoperability Resources (FHIR), Grahame’s approach is transforming virtually all aspects of health informatics. In this chapter we explore FHIR is detail.