description: An invariant that must be satisfied before responses to the questionnaire can be considered \"complete\".
package_name: hl7.fhir.core
derivation: constraint
name: constraint
type: Extension
elements:
  extension:
    type: Extension
    short: Unique identifier
    index: 0
    slicing:
      slices:
        key:
          match: {}
          schema:
            type: Extension
            short: Unique identifier
            _required: true
            index: 0
            extensions: {}
            elements:
              extension: {index: 1}
              url:
                type: uri
                pattern: {type: Uri, value: key}
                index: 2
              valueId: {type: id, index: 3}
        requirements:
          match: {}
          schema:
            type: Extension
            short: Why needed
            index: 4
            extensions: {}
            elements:
              extension: {index: 5}
              url:
                type: uri
                pattern: {type: Uri, value: requirements}
                index: 6
              valueString: {type: string, index: 7}
        severity:
          match: {}
          schema:
            type: Extension
            short: error|warning
            _required: true
            index: 8
            extensions: {}
            elements:
              extension: {index: 9}
              url:
                type: uri
                pattern: {type: Uri, value: severity}
                index: 10
              valueCode:
                type: code
                binding: {strength: required, valueSet: 'http://hl7.org/fhir/ValueSet/constraint-severity'}
                index: 11
        expression:
          match: {}
          schema:
            type: Extension
            short: Formal rule
            _required: true
            index: 12
            extensions: {}
            elements:
              extension: {index: 13}
              url:
                type: uri
                pattern: {type: Uri, value: expression}
                index: 14
              valueString: {type: string, index: 15}
        human:
          match: {}
          schema:
            type: Extension
            short: Human-readable rule
            _required: true
            index: 16
            extensions: {}
            elements:
              extension: {index: 17}
              url:
                type: uri
                pattern: {type: Uri, value: human}
                index: 18
              valueString: {type: string, index: 19}
        location:
          match: {}
          schema:
            type: Extension
            short: Relative path to elements
            array: true
            index: 20
            extensions: {}
            elements:
              extension: {index: 21}
              url:
                type: uri
                pattern: {type: Uri, value: location}
                index: 22
              valueString: {type: string, index: 23}
  url:
    type: uri
    pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/questionnaire-constraint'}
    index: 24
  value:
    choices: []
    index: 26
package_version: 3.5.0
extensions:
  key:
    url: null
    type: Extension
    short: Unique identifier
    _required: true
    index: 0
    extensions: {}
    elements:
      extension: {index: 1}
      url:
        type: uri
        pattern: {type: Uri, value: key}
        index: 2
      valueId: {type: id, index: 3}
  requirements:
    url: null
    type: Extension
    short: Why needed
    index: 4
    extensions: {}
    elements:
      extension: {index: 5}
      url:
        type: uri
        pattern: {type: Uri, value: requirements}
        index: 6
      valueString: {type: string, index: 7}
  severity:
    url: null
    type: Extension
    short: error|warning
    _required: true
    index: 8
    extensions: {}
    elements:
      extension: {index: 9}
      url:
        type: uri
        pattern: {type: Uri, value: severity}
        index: 10
      valueCode:
        type: code
        binding: {strength: required, valueSet: 'http://hl7.org/fhir/ValueSet/constraint-severity'}
        index: 11
  expression:
    url: null
    type: Extension
    short: Formal rule
    _required: true
    index: 12
    extensions: {}
    elements:
      extension: {index: 13}
      url:
        type: uri
        pattern: {type: Uri, value: expression}
        index: 14
      valueString: {type: string, index: 15}
  human:
    url: null
    type: Extension
    short: Human-readable rule
    _required: true
    index: 16
    extensions: {}
    elements:
      extension: {index: 17}
      url:
        type: uri
        pattern: {type: Uri, value: human}
        index: 18
      valueString: {type: string, index: 19}
  location:
    url: null
    type: Extension
    short: Relative path to elements
    array: true
    index: 20
    extensions: {}
    elements:
      extension: {index: 21}
      url:
        type: uri
        pattern: {type: Uri, value: location}
        index: 22
      valueString: {type: string, index: 23}
class: extension
kind: complex-type
url: http://hl7.org/fhir/StructureDefinition/questionnaire-constraint
base: http://hl7.org/fhir/StructureDefinition/Extension
version: null
required: [extension]