description: Will cause a GraphDefinition to be executed and the referred-to instance be considered \"valid\" for that GraphDefinition if the instance is the start of a result of executing that GraphDefinition.
package_name: rs/hl7.fhir.uv.extensions
derivation: constraint
name: GraphConstraint
type: Extension
elements:
  extension: {index: 0}
  url:
    pattern: {type: uri, value: 'http://hl7.org/fhir/StructureDefinition/elementdefinition-graphConstraint'}
    type: uri
    index: 1
  value:
    choices: [valueCanonical]
    index: 3
  valueCanonical: {type: canonical, choiceOf: value, index: 4}
package_version: 5.1.0-cibuild
extensions: {}
class: extension
kind: complex-type
url: http://hl7.org/fhir/StructureDefinition/elementdefinition-graphConstraint
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 5.1.0-cibuild
required: [value, valueCanonical]