FHIR Messaging: the Unloved Paradigm

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" summary

Explains FHIR messaging as a bundle of type message built around a MessageHeader focus and supports notifications, query responses and transactional “messages of consequence” with request/response semantics and async store‑and‑forward. Advises caching response IDs (15 minute guidance seen, some use 24 hours), shows subscriptions using the Subscription resource, warns of snapshot/delete and provenance problems, notes NHS uses Composition as a grouping workaround to avoid graph validation, and that 5 million messages a day beats 50M REST calls because graph definition not supported by validators.

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" chapters (18)

1. 0:00Introduction to FHIR messaging
2. 1:22Why messaging matters
3. 2:25Messaging characteristics in FHIR
4. 5:17Message structure in FHIR
5. 8:15Synchronous vs asynchronous messaging
6. 9:44Message patterns explained
7. 15:08Handling message consequences
8. 17:58Trigger events and focal resources
9. 18:19Snapshot problem in messaging
10. 20:47Querying in FHIR messaging
11. 21:52Subscriptions in FHIR
12. 23:21Conformance in messaging
13. 27:37Graph definitions for validation
14. 31:11Validation challenges
15. 33:40NHS implementation approach
16. 36:11When to choose messaging over REST
17. 37:54Choosing the right paradigm
18. 39:40Q&A on composition and messaging