Sure! FHIRCraft is built using InterSystems IRIS for Health and works through an interoperability production.

When you send a request (e.g. from the web UI), it goes through a REST service that transforms the input JSON into an IRIS message. From there, a business process handles the generation logic. Depending on the configuration, it can reuse existing resources from a FHIR repository or generate new ones.

The generated resources (like Patient, Observation, etc.) are optionally posted back to a FHIR server — either the default IRIS repository or any external one via REST.

It’s modular and easy to extend with new resource types. If you're curious, I wrote a short technical walkthrough here 😉

Wow, thank you very much for this full explanation!! Now I understand better how BPL's work 😊

Thank you very much for the tip, it works!