Primitive Type

FHIR primitive types are a single value. In Gleam, primitive types are record fields with a single value, rather than with child fields. For example, the Patient resource has a Patient.active boolean element, which in Gleam is a Bool in r4.Patient.

pub type Patient {
  Patient(
    ...
    active: Option(Bool),
    ...
  )
}

Time is represented in valid FHIR formats with primitive types for date, dateTime, instant, and time.

A code field can be either an enum from valuesets if the field has a required binding, or a String if not.