code

primitive type

Base StructureDefinition for code type: A string which has at least one character and no leading or trailing whitespace and where there is no whitespace other than single spaces in the contents

Official spec

Path	Card.	Type	Description & Constraints
code	0..*	—	Primitive Type code
.id	0..1	String	xml:id (or equivalent in JSON)
.extension	0..*	Extension	Additional content defined by implementations
.value	0..1	String	Primitive value for code