FHIR R5 Subscription replaced R4's per-endpoint criteria-and-hook model with a topic-based model where multiple subscribers reference shared SubscriptionTopic definitions. This scales much better in production; understanding the model matters for anyone building event-driven FHIR integrations. SubscriptionTopic structure A SubscriptionTopic defines: resourceTrigger (what change fires the topic), notificationShape (which fields ride the notification), and canFilterBy (filter […]
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FHIR Experts − Reshaping Digital Healthcare in the USA
Digital healthcare is rapidly changing how medical services are delivered, accessed, and managed in the United States. This transformation hinges on interoperability, the seamless exchange of information between different healthcare systems. At the heart of this movement are FHIR experts, who are revolutionizing how healthcare data is handled, ultimately improving patient outcomes and experiences. The […]
FHIR Data Validation: How `$validate` Actually Works in Production
FHIR `$validate` operation validates a resource against a profile and returns an OperationOutcome. In production the operation is invoked in three modes, each with different semantics and different failure modes. Mode 1: Write-time validation. POST or PUT with x-fhir-request-headers: return=OperationOutcome. The server validates, rejects on error, and returns the OperationOutcome with issues. Best for strict […]
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