Module types 

Navigating types: the type of a variable, its elements, and the types of those.

Shared by the checker and the engine, so both see the same elements: inherited ones from base structures, backbone elements declared inline, content references (Questionnaire.item.item), a primitive’s value, and the type a choice element takes.

Structs

ElementRef

An element found on a type.

Types

Navigates types through a set of definitions.

Enums

Lookup

The result of looking up an element.

Type

The type of a value: a structure, or a backbone element inside one.