Shared modelling rules

Use these pages while mapping EHR information. Each explains a decision shared across profiles; the profile definitions remain the source for exact field constraints.

Topic	Use it to understand
Clinical coding	How to use SNOMED CT concepts, expressions, coding slices and terminology validation.
Dental anatomy	How tooth and surface groups in bodySite relate to the complete coded meaning.
References and identifiers	How records identify patients, professionals and one another, and how source identifiers differ from FHIR IDs.
Reading the profiles	FHIR glossary, Simplifier tables and flags, terminology bindings, source population and validation.

The Profile map lists shared formats, extensions and project ValueSets in one place.

For a complete clinical context, open the recall-to-treatment scenario. For the applicable definition, use the Profile guide.