description: This profile defines a head circumference information structure for use in an Australian context that tightens the HeadCircumCode slice, aligning to the proposed [R4 Observation Head Circumference](http://build.fhir.org/headcircum.html) profile.
package_name: hl7.fhir.au.base
derivation: constraint
name: AUHeadCircum
type: Observation
elements:
  code:
    short: Required head circumference code
    index: 0
    elements:
      coding:
        short: Required coding
        index: 1
        slicing:
          slices:
            HeadCircumCode:
              match: {}
              schema:
                short: Head circumference code
                _required: true
                index: 2
                elements:
                  system: {short: LOINC coding system, index: 3}
                  code: {short: Head circumference LOINC code, index: 4}
                required: [system, code]
    required: [coding]
package_version: 1.0.2
class: profile
kind: resource
url: http://hl7.org.au/fhir/StructureDefinition/au-headcircum
base: http://hl7.org/fhir/StructureDefinition/headcircum
version: 1.0.2