{
  "description": "Record of the date and/or time of the first exposure to the Substance for this Reaction Event.",
  "_filename": "StructureDefinition-openEHR-exposureDate.json",
  "package_name": "hl7.fhir.r2b.core",
  "date": null,
  "derivation": "constraint",
  "publisher": "Health Level Seven, Inc / openEHR project",
  "fhirVersion": "1.6.0",
  "name": "Date(/time) of first exposure to Substance",
  "baseType": "Extension",
  "abstract": false,
  "type": null,
  "experimental": "false",
  "resourceType": "StructureDefinition",
  "title": null,
  "package_version": "1.4.0",
  "snapshot": {
    "element": [ {
      "path": "Extension",
      "min": 0,
      "definition": "Record of the date and/or time of the first exposure to the Substance for this Reaction Event.",
      "isModifier": false,
      "short": "Date(/time) of first exposure to Substance",
      "comments": "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.",
      "mustSupport": false,
      "max": "1",
      "maxLength": 0,
      "base": {
        "max": "*",
        "min": 0,
        "path": "Extension"
      },
      "isSummary": false
    }, {
      "path": "Extension.id",
      "min": 0,
      "definition": "unique id for the element within a resource (for internal references).",
      "isModifier": false,
      "short": "xml:id (or equivalent in JSON)",
      "mapping": [ {
        "map": "n/a",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "id"
      } ],
      "mustSupport": false,
      "representation": [ "xmlAttr" ],
      "max": "1",
      "maxLength": 0,
      "base": {
        "max": "*",
        "min": 0,
        "path": "Element.id"
      },
      "isSummary": false
    }, {
      "path": "Extension.extension",
      "min": 0,
      "definition": "An Extension",
      "isModifier": false,
      "short": "Extension",
      "name": "extension",
      "type": [ {
        "code": "Extension"
      } ],
      "mustSupport": false,
      "max": "0",
      "maxLength": 0,
      "base": {
        "max": "*",
        "min": 0,
        "path": "Element.extension"
      },
      "isSummary": false
    }, {
      "path": "Extension.url",
      "min": 1,
      "definition": "Source of the definition for the extension code - a logical name or a URL.",
      "isModifier": false,
      "short": "identifies the meaning of the extension",
      "fixedUri": "http://hl7.org/fhir/StructureDefinition/openEHR-exposureDate",
      "comments": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition should be version specific.  This will ideally be the URI for the Resource Profile defining the extension, with the code for the extension after a #.",
      "mapping": [ {
        "map": "N/A",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "uri"
      } ],
      "mustSupport": false,
      "representation": [ "xmlAttr" ],
      "max": "1",
      "maxLength": 0,
      "base": {
        "max": "1",
        "min": 1,
        "path": "Extension.url"
      },
      "isSummary": false
    }, {
      "path": "Extension.valueDateTime",
      "min": 1,
      "definition": "Value of extension - may be a resource or one of a constrained set of the data types (see Extensibility in the spec for list).",
      "isModifier": false,
      "short": "Value of extension",
      "mapping": [ {
        "map": "N/A",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "dateTime"
      } ],
      "mustSupport": false,
      "max": "1",
      "maxLength": 0,
      "base": {
        "max": "1",
        "min": 0,
        "path": "Extension.value[x]"
      },
      "isSummary": false
    } ]
  },
  "status": "draft",
  "id": "442966bc-0aa2-42c2-9a18-ac15bebc80e4",
  "kind": "datatype",
  "url": "http://hl7.org/fhir/StructureDefinition/openEHR-exposureDate",
  "context": [ "AllergyIntolerance.reaction" ],
  "version": null,
  "differential": {
    "element": [ {
      "path": "Extension",
      "min": 0,
      "definition": "Record of the date and/or time of the first exposure to the Substance for this Reaction Event.",
      "isModifier": false,
      "short": "Date(/time) of first exposure to Substance",
      "comments": "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.",
      "type": [ {
        "code": "Extension"
      } ],
      "mustSupport": false,
      "max": "1",
      "maxLength": 0,
      "base": {
        "max": "1",
        "min": 0,
        "path": "Extension"
      },
      "isSummary": false
    }, {
      "path": "Extension.extension",
      "min": 0,
      "isModifier": false,
      "name": "extension",
      "mustSupport": false,
      "max": "0",
      "maxLength": 0,
      "base": {
        "max": "0",
        "min": 0,
        "path": "Extension.extension"
      },
      "isSummary": false
    }, {
      "path": "Extension.url",
      "min": 0,
      "isModifier": false,
      "fixedUri": "http://hl7.org/fhir/StructureDefinition/openEHR-exposureDate",
      "type": [ {
        "code": "uri"
      } ],
      "mustSupport": false,
      "maxLength": 0,
      "base": {
        "max": "1",
        "min": 0,
        "path": "Extension.url"
      },
      "isSummary": false
    }, {
      "min": 1,
      "base": {
        "max": "1",
        "min": 0,
        "path": "Extension.value[x]"
      },
      "path": "Extension.value[x]",
      "type": [ {
        "code": "dateTime"
      } ],
      "isSummary": false,
      "maxLength": 0,
      "isModifier": false,
      "mustSupport": false
    } ]
  },
  "contact": [ {
    "telecom": [ {
      "rank": 1,
      "value": "http://hl7.org",
      "system": "other"
    } ]
  } ],
  "contextType": "resource",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension"
}