description: A flag which indicates the date of birth has unknown day/month or an estimated year of birth. package_name: ca.on.oh.mha-pds derivation: constraint name: DobEstimatedFlag type: Extension elements: url: pattern: {type: Uri, value: 'http://ontariohealth.ca/fhir/StructureDefinition/ca-on-ext-birthdate-estimated-flag'} index: 0 value: short: DOB Estimated Flag pattern: {type: Boolean, value: false} choices: [valueBoolean] index: 2 valueBoolean: type: boolean short: DOB Estimated Flag pattern: {type: Boolean, value: false} choiceOf: value index: 3 package_version: 0.9.0-alpha-1.1 class: extension kind: complex-type url: http://ontariohealth.ca/fhir/StructureDefinition/ca-on-ext-birthdate-estimated-flag base: http://hl7.org/fhir/StructureDefinition/Extension version: null required: [value, valueBoolean]