Concepts
This part explains the ideas you need to use EHRbase-rs effectively. If openEHR is new to you, read the openEHR primer first — it covers the Reference Model, archetypes and templates, versioning, and AQL without assuming prior knowledge. Then System architecture shows how EHRbase-rs is put together and where your data actually lives, so the behaviour you see through the API makes sense.
You do not need to read these before Getting started — but a few minutes here will make every later chapter clearer.