description: null package_name: ca.on.ehr.r4 derivation: constraint name: TestRequestPlacer type: Extension elements: url: pattern: {type: Uri, value: 'http://ehealthontario.ca/fhir/StructureDefinition/ca-on-lab-ext-test-request-placer'} index: 0 value: choices: [valueReference] index: 2 valueReference: type: Reference choiceOf: value refers: ['http://ontariohealth.ca/fhir/ehr/StructureDefinition/profile-organization'] index: 3 value[x]: elements: reference: {index: 4} required: [reference] package_version: 1.0.0-snapshot3 class: extension kind: complex-type url: http://ehealthontario.ca/fhir/StructureDefinition/ca-on-lab-ext-test-request-placer base: http://hl7.org/fhir/StructureDefinition/Extension version: null