FHIR R4 $operations for HealthLake

FHIR $ operations (also called "dollar operations") are special server-side functions that extend beyond standard CRUD (Create, Read, Update, Delete) operations in the FHIR specification. These operations are identified by the "$" prefix and enable complex processing, data transformation, and bulk operations that would be difficult or inefficient to perform using standard REST API calls. $ Operations can be invoked at the system level, resource type level, or on specific resource instances, providing flexible ways to interact with FHIR data. AWS HealthLake supports multiple FHIR $operations. Please refer to each individual pages below for additional details.