Function type_url 

pub fn type_url(code: &str, context_url: &str) -> String

Canonical URL of type code as used inside the structure at context_url: type codes resolve in the same FHIR release as the structure that uses them, so inside a version-specific core structure (http://hl7.org/fhir/4.0/StructureDefinition/Patient) HumanName is the 4.0 one. Anywhere else, profiles included, type codes are the core types.