description: This profile sets minimum expectations for an Observation resource to record, search, and fetch body weight observations with standard coding and units of measure. It is based on the [FHIR Body Weight Profile](http://hl7.org/fhir/R4/bodyweight.html) and identifies the *additional* mandatory core elements, extensions, vocabularies and value sets that **SHALL** be present in the Observation resource when conforming to this profile. It provides the floor for standards development for specific uses cases in an Australian context.
package_name: hl7.fhir.au.core
derivation: constraint
name: AUCoreBodyWeight
type: Observation
elements:
  category:
    index: 1
    slicing:
      slices:
        VSCat:
          match: {}
          schema:
            index: 2
            elements:
              coding:
                index: 3
                elements:
                  system: {index: 4}
                  code: {index: 5}
  valueQuantity:
    short: Body weight
    index: 15
    elements:
      value: {index: 16}
      unit: {index: 17}
      system: {index: 18}
      code:
        binding: {strength: required, valueSet: 'http://hl7.org/fhir/ValueSet/ucum-bodyweight'}
        index: 19
  component:
    index: 21
    elements:
      code: {index: 22}
      value:
        choices: []
        index: 24
      dataAbsentReason: {index: 25}
  effectiveDateTime: {type: dateTime, short: 'Date, and optionally time, the observation was performed', choiceOf: effective, index: 14}
  status: {index: 0}
  effective:
    short: Date, and optionally time, the observation was performed
    choices: [effectiveDateTime]
    index: 13
  code:
    index: 6
    elements:
      coding:
        array: true
        min: 2
        index: 7
        slicing:
          slices:
            snomedBodyWeightCode:
              match: {}
              schema:
                short: SNOMED CT Body Weight
                _required: true
                index: 8
                elements:
                  system:
                    pattern: {type: Uri, value: 'http://snomed.info/sct'}
                    index: 9
                  code:
                    pattern: {type: Code, value: '27113001'}
                    index: 10
                required: [system, code]
  subject:
    type: Reference
    refers: ['http://hl7.org.au/fhir/core/StructureDefinition/au-core-patient']
    index: 11
  dataAbsentReason: {index: 20}
package_version: 1.0.0-preview
class: profile
kind: resource
url: http://hl7.org.au/fhir/core/StructureDefinition/au-core-bodyweight
base: http://hl7.org/fhir/StructureDefinition/bodyweight
version: 1.0.0-preview