{
  "resourceType": "StructureDefinition",
  "id": "relative-date",
  "extension": [
    {
      "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
      "valueCode": "fhir"
    },
    {
      "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
      "valueInteger": 1
    }
  ],
  "url": "http://hl7.org/fhir/StructureDefinition/relative-date",
  "version": "4.0.0",
  "name": "Relative Date Criteria",
  "title": "Relative Date Criteria",
  "status": "draft",
  "date": "2013-12-05",
  "publisher": "Health Level Seven International (FHIR Infrastructure)",
  "contact": [
    {
      "telecom": [
        {
          "system": "url",
          "value": "http://www.hl7.org/Special/committees/fiwg"
        }
      ]
    }
  ],
  "description": "Specifies that a date is relative to some event. The event happens [Duration] after [Event].",
  "fhirVersion": "4.0.0",
  "mapping": [
    {
      "identity": "rim",
      "uri": "http://hl7.org/v3",
      "name": "RIM Mapping"
    }
  ],
  "kind": "complex-type",
  "abstract": false,
  "context": [
    {
      "type": "element",
      "expression": "date"
    },
    {
      "type": "element",
      "expression": "dateTime"
    }
  ],
  "type": "Extension",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "short": "Relative Date Criteria",
        "definition": "Specifies that a date is relative to some event. The event happens [Duration] after [Event].",
        "comment": "This extension is used when a precise date is not known, but rather, the date will be relative to some future event (e.g. Do this 2 weeks after an operation).",
        "min": 0,
        "max": "1"
      },
      {
        "id": "Extension.extension:event",
        "path": "Extension.extension",
        "sliceName": "event",
        "short": "Event that the date is relative to",
        "definition": "The event that the date(time) is relative to.",
        "comment": "This can be a reference to a particular event, or a kind of event (usually where the kind would not happen very frequently).",
        "min": 1,
        "max": "1",
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "id": "Extension.extension:event.extension",
        "path": "Extension.extension.extension",
        "max": "0"
      },
      {
        "id": "Extension.extension:event.url",
        "path": "Extension.extension.url",
        "type": [
          {
            "code": "uri"
          }
        ],
        "fixedUri": "event"
      },
      {
        "id": "Extension.extension:event.value[x]",
        "path": "Extension.extension.value[x]",
        "min": 1,
        "type": [
          {
            "code": "Reference",
            "targetProfile": [
              "http://hl7.org/fhir/StructureDefinition/Resource"
            ]
          },
          {
            "code": "CodeableConcept"
          }
        ]
      },
      {
        "id": "Extension.extension:relationship",
        "path": "Extension.extension",
        "sliceName": "relationship",
        "short": "before-start | before | before-end | concurrent-with-start | concurrent | concurrent-with-end | after-start | after | after-end",
        "definition": "Defines the relationship between the event and the date.",
        "min": 1,
        "max": "1",
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "id": "Extension.extension:relationship.extension",
        "path": "Extension.extension.extension",
        "max": "0"
      },
      {
        "id": "Extension.extension:relationship.url",
        "path": "Extension.extension.url",
        "type": [
          {
            "code": "uri"
          }
        ],
        "fixedUri": "relationship"
      },
      {
        "id": "Extension.extension:relationship.valueCode",
        "path": "Extension.extension.valueCode",
        "type": [
          {
            "code": "code"
          }
        ],
        "binding": {
          "extension": [
            {
              "url": "http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName",
              "valueString": "ActionRelationshipType"
            }
          ],
          "strength": "required",
          "description": "Defines the types of relationships between actions.",
          "valueSet": "http://hl7.org/fhir/ValueSet/action-relationship-type|4.0.0"
        }
      },
      {
        "id": "Extension.extension:offset",
        "path": "Extension.extension",
        "sliceName": "offset",
        "short": "Duration after the event",
        "definition": "The duration after the event that the date(time) will happen.",
        "min": 1,
        "max": "1",
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "id": "Extension.extension:offset.extension",
        "path": "Extension.extension.extension",
        "max": "0"
      },
      {
        "id": "Extension.extension:offset.url",
        "path": "Extension.extension.url",
        "type": [
          {
            "code": "uri"
          }
        ],
        "fixedUri": "offset"
      },
      {
        "id": "Extension.extension:offset.valueDuration",
        "path": "Extension.extension.valueDuration",
        "type": [
          {
            "code": "Duration"
          }
        ]
      },
      {
        "id": "Extension.url",
        "path": "Extension.url",
        "type": [
          {
            "code": "uri"
          }
        ],
        "fixedUri": "http://hl7.org/fhir/StructureDefinition/relative-date"
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "min": 0,
        "max": "0"
      }
    ]
  }
}