Extension-imagingstudy-radiationduration.json

The length of time for radiation exposure

{
  "resourceType": "StructureDefinition",
  "id": "imagingstudy-radiationDuration",
  "url": "http://hl7.org/fhir/StructureDefinition/imagingstudy-radiationDuration",
  "name": "The length of time for radiation exposure",
  "display": "radiationDuration",
  "status": "draft",
  "publisher": "Health Level Seven, Inc. - FHIR WG",
  "contact": [
    {
      "telecom": [
        {
          "system": "other",
          "value": "HL7"
        }
      ]
    }
  ],
  "date": "2015-02-21",
  "description": "The duration of exposure to radiation for this study.",
  "fhirVersion": "1.4.0",
  "kind": "datatype",
  "abstract": false,
  "contextType": "resource",
  "context": [
    "ImagingStudy"
  ],
  "baseType": "Extension",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation": "constraint",
  "snapshot": {
    "element": [
      {
        "path": "Extension",
        "short": "The length of time for radiation exposure",
        "definition": "The duration of exposure to radiation for this study.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "path": "Extension.id",
        "representation": [
          "xmlAttr"
        ],
        "short": "xml:id (or equivalent in JSON)",
        "definition": "unique id for the element within a resource (for internal references).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.id",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "id"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "path": "Extension.extension",
        "name": "extension",
        "short": "Extension",
        "definition": "An Extension",
        "min": 0,
        "max": "0",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "path": "Extension.url",
        "representation": [
          "xmlAttr"
        ],
        "short": "identifies the meaning of the extension",
        "definition": "Source of the definition for the extension code - a logical name or a URL.",
        "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 #.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "type": [
          {
            "code": "uri"
          }
        ],
        "fixedUri": "http://hl7.org/fhir/StructureDefinition/imagingstudy-radiationDuration",
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "path": "Extension.valueQuantity",
        "name": "Duration",
        "short": "Value of extension",
        "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).",
        "comments": "The context of use may frequently define what kind of quantity this is and therefore what kind of units can be used. The context of use may also restrict the values for the comparator.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "Quantity",
            "profile": [
              "http://hl7.org/fhir/StructureDefinition/Duration"
            ]
          }
        ],
        "constraint": [
          {
            "key": "qty-3",
            "severity": "error",
            "human": "If a code for the unit is present, the system SHALL also be present",
            "expression": "code.empty() or system",
            "xpath": "not(exists(f:code)) or exists(f:system)"
          },
          {
            "key": "drt-1",
            "severity": "error",
            "human": "There SHALL be a code if there is a value and it SHALL be an expression of time.  If system is present, it SHALL be UCUM.",
            "expression": "(code or value.empty()) and (system.empty() or system = %ucum)",
            "xpath": "(f:code or not(f:value)) and (not(exists(f:system)) or f:system/@value='http://unitsofmeasure.org')"
          }
        ],
        "mapping": [
          {
            "identity": "v2",
            "map": "SN (see also Range) or CQ"
          },
          {
            "identity": "rim",
            "map": "PQ, IVL<PQ>, MO, CO, depending on the values"
          }
        ]
      }
    ]
  },
  "differential": {
    "element": [
      {
        "path": "Extension",
        "short": "The length of time for radiation exposure",
        "definition": "The duration of exposure to radiation for this study.",
        "min": 0,
        "max": "1",
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "path": "Extension.extension",
        "name": "extension",
        "max": "0"
      },
      {
        "path": "Extension.url",
        "type": [
          {
            "code": "uri"
          }
        ],
        "fixedUri": "http://hl7.org/fhir/StructureDefinition/imagingstudy-radiationDuration"
      },
      {
        "path": "Extension.value[x]",
        "min": 1,
        "type": [
          {
            "code": "Quantity",
            "profile": [
              "http://hl7.org/fhir/StructureDefinition/Duration"
            ]
          }
        ]
      }
    ]
  }
}