The Foundation Component represents the entire WHO-FIC universe. It is a multidimensional collection of interconnected entities and synonyms.
These entities consist of diseases, disorders, injuries, external causes, signs and symptoms, functional descriptions, interventions, and extension codes.
ICD-11 statistical core (MMS) is derived from this foundation, ICF and ICHI will follow.
The entities in the Foundation Component:
are not necessarily mutually exclusive
allow multiple parenting ( i. e. an entity may be in more than one branch, for example tuberculosis meningitis is both an infection and a brain disease)