http://hl7.org/fhir/StructureDefinition/iso21090-ADXP-additionalLocator|4.0.1

This can be a unit designator, such as apartment number, suite number, or floor. There may be several unit designators in an address (e.g., \"3rd floor, Appt. 342\"). This can also be a designator pointing away from the location, rather than specifying a smaller location within some larger one (e.g., Dutch \"t.o.\" means \"opposite to\" for house boats located across the street facing houses).
{
  "description": "This can be a unit designator, such as apartment number, suite number, or floor. There may be several unit designators in an address (e.g., \\\"3rd floor, Appt. 342\\\"). This can also be a designator pointing away from the location, rather than specifying a smaller location within some larger one (e.g., Dutch \\\"t.o.\\\" means \\\"opposite to\\\" for house boats located across the street facing houses).",
  "package": "hl7.fhir.r4.core@4.0.1",
  "date": "2012-06-24T00:00:00Z",
  "derivation": "constraint",
  "publisher": "Health Level Seven International (Modeling and Methodology)",
  "fhirVersion": "4.0.1",
  "name": "ADXP-additionalLocator",
  "mapping": [ {
    "uri": "http://hl7.org/v3",
    "name": "RIM Mapping",
    "identity": "rim"
  } ],
  "abstract": false,
  "type": "Extension",
  "experimental": null,
  "resourceType": "StructureDefinition",
  "fhirversion": null,
  "title": null,
  "versionAlgorithmCoding": null,
  "extension": [ {
    "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
    "valueCode": "fhir"
  }, {
    "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
    "valueInteger": 1
  } ],
  "status": "draft",
  "id": "6fb2068a-ec27-578c-a60b-6ee0233797fd",
  "kind": "complex-type",
  "url": "http://hl7.org/fhir/StructureDefinition/iso21090-ADXP-additionalLocator",
  "identifier": null,
  "context": [ {
    "type": "element",
    "expression": "Address.line"
  } ],
  "versionAlgorithmString": null,
  "fhir_id": null,
  "version": "4.0.1",
  "contact": [ {
    "telecom": [ {
      "value": "http://www.hl7.org/Special/committees/mnm",
      "system": "url"
    } ]
  } ],
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension"
}