description: UnitOrAptNumber component of address as [defined by USPS](https://pe.usps.com/cpim/ftp/pubs/pub28/pub28.pdf)
package_name: hl7.fhir.us.vr
derivation: constraint
name: ExtensionUnitOrAptNumberVitalRecords
type: Extension
elements:
  extension: {index: 0}
  url:
    pattern: {type: Uri, value: 'http://hl7.org/fhir/us/vr-common-library/StructureDefinition/UnitOrAptNumber'}
    index: 1
  value:
    short: For NCHS Submissions this field is limited to length 10
    choices: [valueString]
    index: 3
  valueString: {type: string, short: For NCHS Submissions this field is limited to length 10, choiceOf: value, index: 4}
package_version: common-library-2.0.0
extensions: {}
class: extension
kind: complex-type
url: http://hl7.org/fhir/us/vr-common-library/StructureDefinition/UnitOrAptNumber
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 2.0.0
required: [valueString, value]