Sometimes a graphic is worth more than words. This is an attempt to capture all the salient features of multi-level modelling, the openEHR way. See the openEHR primer for the story.

Although this is ‘our way’ of doing it, I contend that the general scheme is universally needed – see the bullet list after the cartoons in this older post on openEHR for HL7 FHIR users.
Comments welcome.