Extension-imagingstudy-radiationduration.xml

The length of time for radiation exposure

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