{
  "resourceType": "StructureDefinition",
  "id": "openEHR-exposureDate",
  "extension": [
    {
      "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
      "valueCode": "pc"
    },
    {
      "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
      "valueInteger": 1
    }
  ],
  "url": "http://hl7.org/fhir/StructureDefinition/openEHR-exposureDate",
  "name": "exposureDate",
  "status": "draft",
  "date": "2014-10-09",
  "publisher": "Health Level Seven, Inc / openEHR project",
  "contact": [
    {
      "telecom": [
        {
          "system": "url",
          "value": "http://hl7.org"
        }
      ]
    }
  ],
  "description": "Record of the date and/or time of the first exposure to the Substance for this Reaction Event.",
  "fhirVersion": "3.0.1",
  "mapping": [
    {
      "identity": "rim",
      "uri": "http://hl7.org/v3",
      "name": "RIM Mapping"
    }
  ],
  "kind": "complex-type",
  "abstract": false,
  "contextType": "resource",
  "context": [
    "AllergyIntolerance.reaction"
  ],
  "type": "Extension",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "short": "Date(/time) of first exposure to Substance",
        "definition": "Record of the date and/or time of the first exposure to the Substance for this Reaction Event.",
        "comment": "Exposure can be more complicated by more than one exposure events leading to a reaction. Further details about the nature of the exposure can be provided in additional extensions, or as text in the Exposure Description extension.",
        "min": 0,
        "max": "1"
      },
      {
        "id": "Extension.extension",
        "path": "Extension.extension",
        "max": "0"
      },
      {
        "id": "Extension.url",
        "path": "Extension.url",
        "type": [
          {
            "code": "uri"
          }
        ],
        "fixedUri": "http://hl7.org/fhir/StructureDefinition/openEHR-exposureDate"
      },
      {
        "id": "Extension.valueDateTime",
        "path": "Extension.valueDateTime",
        "type": [
          {
            "code": "dateTime"
          }
        ]
      }
    ]
  }
}