R4 Ballot #1 (Mixed Normative/Trial use)

This page is part of the FHIR Specification (v3.3.0: R4 Ballot 2). The current version which supercedes this version is 4.0.1. For a full list of available versions, see the Directory of published versions

Bodyheight-questionnaire.xml

Orders and Observations Work GroupMaturity Level: N/ABallot Status: InformativeCompartments: Device, Encounter, Patient, Practitioner, RelatedPerson

Raw XML (canonical form)

Generated Questionnaire for bodyheight

<?xml version="1.0" encoding="UTF-8"?>

<Questionnaire xmlns="http://hl7.org/fhir">
  <id value="qs1"/>
  <contained>
    <ValueSet>
      <id value="vs2"/>
      <name value="Type options for Observation.effective[x]"/>
      <status value="active"/>
      <description value="Type options for Observation.effective[x]"/>
      <expansion>
        <identifier value="urn:uuid:50157159-14c8-4322-8aa4-c988e861e537"/>
        <timestamp value="2018-04-03T12:16:44+10:00"/>
        <contains>
          <system value="http://hl7.org/fhir/data-types"/>
          <code value="dateTime"/>
          <display value="dateTime"/>
        </contains>
        <contains>
          <system value="http://hl7.org/fhir/data-types"/>
          <code value="Period"/>
          <display value="Period"/>
        </contains>
      </expansion>
    </ValueSet>
  </contained>
  <contained>
    <ValueSet>
      <id value="vs3"/>
      <name value="Type options for Observation.component.value[x]"/>
      <status value="active"/>
      <description value="Type options for Observation.component.value[x]"/>
      <expansion>
        <identifier value="urn:uuid:3b4a52f5-a368-45a7-a0e9-5e259eeb3980"/>
        <timestamp value="2018-04-03T12:16:44+10:00"/>
        <contains>
          <system value="http://hl7.org/fhir/data-types"/>
          <code value="Quantity"/>
          <display value="Quantity"/>
        </contains>
        <contains>
          <system value="http://hl7.org/fhir/data-types"/>
          <code value="CodeableConcept"/>
          <display value="CodeableConcept"/>
        </contains>
        <contains>
          <system value="http://hl7.org/fhir/data-types"/>
          <code value="string"/>
          <display value="string"/>
        </contains>
        <contains>
          <system value="http://hl7.org/fhir/data-types"/>
          <code value="boolean"/>
          <display value="boolean"/>
        </contains>
        <contains>
          <system value="http://hl7.org/fhir/data-types"/>
          <code value="integer"/>
          <display value="integer"/>
        </contains>
        <contains>
          <system value="http://hl7.org/fhir/data-types"/>
          <code value="Range"/>
          <display value="Range"/>
        </contains>
        <contains>
          <system value="http://hl7.org/fhir/data-types"/>
          <code value="Ratio"/>
          <display value="Ratio"/>
        </contains>
        <contains>
          <system value="http://hl7.org/fhir/data-types"/>
          <code value="SampledData"/>
          <display value="SampledData"/>
        </contains>
        <contains>
          <system value="http://hl7.org/fhir/data-types"/>
          <code value="time"/>
          <display value="time"/>
        </contains>
        <contains>
          <system value="http://hl7.org/fhir/data-types"/>
          <code value="dateTime"/>
          <display value="dateTime"/>
        </contains>
        <contains>
          <system value="http://hl7.org/fhir/data-types"/>
          <code value="Period"/>
          <display value="Period"/>
        </contains>
      </expansion>
    </ValueSet>
  </contained>
  <identifier>
    <system value="urn:ietf:rfc:3986"/>
  </identifier>
  <status value="draft"/>
  <date value="2016-03-25T00:00:00+11:00"/>
  <publisher value="Health Level Seven International (Orders and Observations Workgroup)"/>
  <item>
    <linkId value="Observation"/>
    <text value="FHIR Body Height Profile"/>
    <type value="group"/>
    <required value="false"/>
    <repeats value="true"/>
    <item>
      <text value="Used for simple observations such as device measurements, laboratory atomic results, vital signs, height, weight, smoking status, comments, etc.  Other resources are used to provide context for observations such as laboratory reports, etc."/>
      <type value="display"/>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
        <valueCodeableConcept>
          <coding>
            <system value="http://hl7.org/fhir/questionnaire-item-control"/>
            <code value="flyover"/>
            <display value="Fly-over"/>
          </coding>
        </valueCodeableConcept>
      </extension>
      <text value="This profile defines  how to represent Body Height observations in FHIR using a standard LOINC code and UCUM units of measure."/>
      <type value="display"/>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
        <valueInteger value="1"/>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
        <valueString value="string"/>
      </extension>
      <linkId value="Observation.id"/>
      <type value="group"/>
      <required value="false"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="The logical id of the resource, as used in the URL for the resource. Once assigned, this value never changes. The only time that a resource does not have an id is when it is being submitted to the server using a create operation."/>
        <type value="display"/>
      </item>
      <item>
        <linkId value="Observation.id.value"/>
        <text value="Logical id of this artifact"/>
        <type value="string"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
        <valueInteger value="1"/>
      </extension>
      <linkId value="Observation.meta"/>
      <text value="Metadata about the resource"/>
      <type value="group"/>
      <required value="false"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="The metadata about the resource. This is content that is maintained by the infrastructure. Changes to the content might not always be associated with version changes to the resource."/>
        <type value="display"/>
      </item>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
        <valueInteger value="1"/>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
        <valueString value="uri"/>
      </extension>
      <linkId value="Observation.implicitRules"/>
      <type value="group"/>
      <required value="false"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="A reference to a set of rules that were followed when the resource was constructed, and which must be understood when processing the content. Often, this is a reference to an implementation guide that defines the special rules along with other profiles etc. Asserting this rule set restricts the content to be only understood by a limited set of trading partners. This inherently limits the usefulness of the data in the long term. However, the existing health eco-system is highly fractured, and not yet ready to define, collect, and exchange data in a generally computable sense. Wherever possible, implementers and/or specification writers should avoid using this element. Often, when used, the URL is a reference to an implementation guide that defines these special rules as part of it&#39;s narrative along with other profiles, value sets, etc."/>
        <type value="display"/>
      </item>
      <item>
        <linkId value="Observation.implicitRules.value"/>
        <text value="A set of rules under which this content was created"/>
        <type value="string"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
        <valueInteger value="1"/>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
        <valueString value="code"/>
      </extension>
      <linkId value="Observation.language"/>
      <type value="group"/>
      <required value="false"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="The base language in which the resource is written. Language is provided to support indexing and accessibility (typically, services such as text to speech use the language tag). The html language tag in the narrative applies  to the narrative. The language tag on the resource may be used to specify the language of other presentations generated from the data in the resource. Not all the content has to be in the base language. The Resource.language should not be assumed to apply to the narrative automatically. If a language is specified, it should it also be specified on the div element in the html (see rules in HTML5 for information about the relationship between xml:lang and the html lang attribute)."/>
        <type value="display"/>
      </item>
      <item>
        <linkId value="Observation.language.value"/>
        <text value="language"/>
        <type value="choice"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
        <valueInteger value="1"/>
      </extension>
      <linkId value="Observation.text"/>
      <text value="Text summary of the resource, for human interpretation"/>
      <type value="group"/>
      <required value="false"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="A human-readable narrative that contains a summary of the resource and can be used to represent the content of the resource to a human. The narrative need not encode all the structured data, but is required to contain sufficient detail to make it &quot;clinically safe&quot; for a human to just read the narrative. Resource definitions may define what content should be represented in the narrative to ensure clinical safety. Contained resources do not have narrative. Resources that are not contained SHOULD have a narrative. In some cases, a resource may only have text with little or no additional discrete data (as long as all minOccurs=1 elements are satisfied).  This may be necessary for data from legacy systems where information is captured as a &quot;text blob&quot; or where text is additionally entered raw or narrated and encoded in formation is added later."/>
        <type value="display"/>
      </item>
    </item>
    <item>
      <linkId value="Observation.contained"/>
      <text value="Contained, inline Resources"/>
      <type value="group"/>
      <required value="false"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="These resources do not have an independent existence apart from the resource that contains them - they cannot be identified independently, and nor can they have their own independent transaction scope. This should never be done when the content can be identified properly, as once identification is lost, it is extremely difficult (and context dependent) to restore it again."/>
        <type value="display"/>
      </item>
    </item>
    <item>
      <linkId value="Observation.extension"/>
      <text value="Additional Content defined by implementations"/>
      <type value="group"/>
      <required value="false"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="May be used to represent additional information that is not part of the basic definition of the resource. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/>
        <type value="display"/>
      </item>
    </item>
    <item>
      <linkId value="Observation.modifierExtension"/>
      <text value="Extensions that cannot be ignored"/>
      <type value="group"/>
      <required value="false"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="May be used to represent additional information that is not part of the basic definition of the resource, and that modifies the understanding of the element that contains it. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions. There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/>
        <type value="display"/>
      </item>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
        <valueString value="Identifier"/>
      </extension>
      <linkId value="Observation.identifier"/>
      <text value="Business Identifier for observation"/>
      <type value="group"/>
      <required value="false"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="A unique identifier assigned to this observation."/>
        <type value="display"/>
      </item>
      <item>
        <linkId value="Observation.identifier.label"/>
        <text value="label:"/>
        <type value="string"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
      <item>
        <linkId value="Observation.identifier.system"/>
        <text value="system:"/>
        <type value="string"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
      <item>
        <linkId value="Observation.identifier.value"/>
        <text value="value:"/>
        <type value="string"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
        <valueString value="Reference"/>
      </extension>
      <linkId value="Observation.basedOn"/>
      <type value="group"/>
      <required value="false"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="A plan, proposal or order that is fulfilled in whole or in part by this event."/>
        <type value="display"/>
      </item>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-allowedResource">
          <valueCode value="CarePlan, DeviceRequest, ImmunizationRecommendation, MedicationRequest, NutritionOrder, ServiceRequest"/>
        </extension>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-referenceFilter">
          <valueString value="subject=$subj&amp;patient=$subj&amp;encounter=$encounter"/>
        </extension>
        <linkId value="Observation.basedOn.value"/>
        <text value="Fulfills plan, proposal or order"/>
        <type value="reference"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
        <valueString value="Reference"/>
      </extension>
      <linkId value="Observation.partOf"/>
      <type value="group"/>
      <required value="false"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="A larger event of which this particular Observation is a component or step.  For example,  an observation as part of a procedure. To link an Observation to an Encounter use `context`.  See the  [Notes](observation.html#obsgrouping) below for guidance on referencing another Observation."/>
        <type value="display"/>
      </item>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-allowedResource">
          <valueCode value="MedicationAdministration, MedicationDispense, MedicationStatement, Procedure, Immunization, ImagingStudy"/>
        </extension>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-referenceFilter">
          <valueString value="subject=$subj&amp;patient=$subj&amp;encounter=$encounter"/>
        </extension>
        <linkId value="Observation.partOf.value"/>
        <text value="Part of referenced event"/>
        <type value="reference"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-minOccurs">
        <valueInteger value="1"/>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
        <valueInteger value="1"/>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
        <valueString value="code"/>
      </extension>
      <linkId value="Observation.status"/>
      <type value="group"/>
      <required value="true"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="The status of the result value. This element is labeled as a modifier because the status contains codes that mark the resource as not currently valid."/>
        <type value="display"/>
      </item>
      <item>
        <linkId value="Observation.status.value"/>
        <text value="status"/>
        <type value="choice"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-minOccurs">
        <valueInteger value="1"/>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
        <valueString value="CodeableConcept"/>
      </extension>
      <linkId value="Observation.category"/>
      <text value="Classification of  type of observation"/>
      <type value="group"/>
      <required value="true"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="A code that classifies the general type of observation being made. In addition to the required category valueset, this element allows various categorization schemes based on the owner&#x2019;s definition of the category and effectively multiple categories can be used at once.  The level of granularity is defined by the category concepts in the value set."/>
        <type value="display"/>
      </item>
      <item>
        <linkId value="Observation.category.coding"/>
        <text value="code:"/>
        <type value="open-choice"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
      <item>
        <linkId value="Observation.category.text"/>
        <text value="text:"/>
        <type value="string"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-minOccurs">
        <valueInteger value="1"/>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
        <valueInteger value="1"/>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
        <valueString value="CodeableConcept"/>
      </extension>
      <linkId value="Observation.category"/>
      <text value="Classification of  type of observation"/>
      <type value="group"/>
      <required value="true"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="A code that classifies the general type of observation being made. In addition to the required category valueset, this element allows various categorization schemes based on the owner&#x2019;s definition of the category and effectively multiple categories can be used at once.  The level of granularity is defined by the category concepts in the value set."/>
        <type value="display"/>
      </item>
      <item>
        <linkId value="Observation.category.coding"/>
        <text value="code:"/>
        <type value="open-choice"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
      <item>
        <linkId value="Observation.category.text"/>
        <text value="text:"/>
        <type value="string"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-minOccurs">
        <valueInteger value="1"/>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
        <valueInteger value="1"/>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
        <valueString value="CodeableConcept"/>
      </extension>
      <linkId value="Observation.code"/>
      <text value="Body Height"/>
      <type value="group"/>
      <required value="true"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="Body Height. additional codes that translate or map to this code are allowed.  For example a more granular LOINC code or code that is used locally in a system."/>
        <type value="display"/>
      </item>
      <item>
        <linkId value="Observation.code.coding"/>
        <text value="code:"/>
        <type value="open-choice"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
      <item>
        <linkId value="Observation.code.text"/>
        <text value="text:"/>
        <type value="string"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-minOccurs">
        <valueInteger value="1"/>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
        <valueInteger value="1"/>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
        <valueString value="Reference"/>
      </extension>
      <linkId value="Observation.subject"/>
      <type value="group"/>
      <required value="true"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="The patient, or group of patients, location, or device whose characteristics (direct or indirect) are described by the observation and into whose record the observation is placed.  Comments: Indirect characteristics may be those of a specimen, fetus, donor,  other observer (for example a relative or EMT), or any observation made about the subject. One would expect this element to be a cardinality  of 1..1.  The only circumstance in which the subject can be missing is when the observation is made by a device that does not know the patient. In this case, the observation SHALL be matched to a patient through some context/channel matching technique, and at this point, the observation should be updated  &#xD;&#xD;If theactual focus of the observation is different than the subject, the`focus` element may be used.  However, the distinction between the patient&#39;s own value for an observation versus that of the fetus, or the donor or blood product unit, etc., are often specified in the observation code."/>
        <type value="display"/>
      </item>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-allowedResource">
          <valueCode value="Patient"/>
        </extension>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-referenceFilter">
          <valueString value="subject=$subj&amp;patient=$subj&amp;encounter=$encounter"/>
        </extension>
        <linkId value="Observation.subject.value"/>
        <text value="Who and/or what this is about"/>
        <type value="reference"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
        <valueInteger value="1"/>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
        <valueString value="Reference"/>
      </extension>
      <linkId value="Observation.focus"/>
      <type value="group"/>
      <required value="false"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="The actual focus of an observation when it is not the patient of record.  The focus is point of attention when the observation representing something  or someone associated with the patient.  It could be  a  spouse or parent, a fetus or donor.  The focus of an observation could be an existing condition,  an intervention, the subject&#39;s diet,  another observation of the subject,  or a body structure such as tumor or implanted device.   An example use case would be using the Observation resource to capture whether the mother is trained to change her child&#39;s tracheostomy tube. In this example, the child is the patient of record and the mother is the focus. Typically, an observation is made about the subject - a patient, or group of patients, location, or device - and the distinction between the subject and what is directly measured for an observation is specified in the observation code itself ( e.g., &quot;Blood Glucose&quot;) and does not need to be represented separately using this element.  Use `specimen` if a reference to a specimen is required.  If a code is required instead of a resource use either  `bodysite` for bodysites or the standard extension [focus-code](extension-observation-focus-code.html)."/>
        <type value="display"/>
      </item>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-allowedResource">
          <valueCode value="Resource"/>
        </extension>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-referenceFilter">
          <valueString value="subject=$subj&amp;patient=$subj&amp;encounter=$encounter"/>
        </extension>
        <linkId value="Observation.focus.value"/>
        <text value="The &quot;focal point&quot; of the observation"/>
        <type value="reference"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
        <valueInteger value="1"/>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
        <valueString value="Reference"/>
      </extension>
      <linkId value="Observation.context"/>
      <type value="group"/>
      <required value="false"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="The healthcare event  (e.g. a patient and healthcare provider interaction) during which this observation is made. This will typically be the encounter the event occurred within, but some events may be initiated prior to or after the official completion of an encounter or episode but still be tied to the context of the encounter or episode (e.g. pre-admission laboratory tests)."/>
        <type value="display"/>
      </item>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-allowedResource">
          <valueCode value="Encounter, EpisodeOfCare"/>
        </extension>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-referenceFilter">
          <valueString value="subject=$subj&amp;patient=$subj&amp;encounter=$encounter"/>
        </extension>
        <linkId value="Observation.context.value"/>
        <text value="Healthcare event during which this observation is made"/>
        <type value="reference"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-minOccurs">
        <valueInteger value="1"/>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
        <valueInteger value="1"/>
      </extension>
      <linkId value="Observation.effective[x]"/>
      <text value="Often just a dateTime for Vital Signs"/>
      <type value="group"/>
      <required value="true"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="Often just a dateTime for Vital Signs. At least a date should be present unless this observation is a historical report.  For recording imprecise or &quot;fuzzy&quot; times (For example, a blood glucose measurement taken &quot;after breakfast&quot;) use the [Timing](datatypes.html#timing) datatype which allow the measurement to be tied to regular life events."/>
        <type value="display"/>
      </item>
      <item>
        <linkId value="Observation.effective[x]._type"/>
        <text value="type"/>
        <type value="choice"/>
        <required value="false"/>
        <repeats value="false"/>
        <options value="#vs2"/>
        <item>
          <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
            <valueString value="datetime"/>
          </extension>
          <linkId value="Observation.effective[x]._null"/>
          <type value="group"/>
          <item>
            <linkId value="Observation.effective[x]._null.value"/>
            <type value="dateTime"/>
            <required value="false"/>
            <repeats value="false"/>
          </item>
        </item>
        <item>
          <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
            <valueString value="Period"/>
          </extension>
          <linkId value="Observation.effective[x]._null"/>
          <type value="group"/>
          <item>
            <linkId value="Observation.effective[x]._null.low"/>
            <text value="start:"/>
            <type value="dateTime"/>
            <required value="false"/>
            <repeats value="false"/>
          </item>
          <item>
            <linkId value="Observation.effective[x]._null.end"/>
            <text value="end:"/>
            <type value="dateTime"/>
            <required value="false"/>
            <repeats value="false"/>
          </item>
        </item>
      </item>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
        <valueInteger value="1"/>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
        <valueString value="instant"/>
      </extension>
      <linkId value="Observation.issued"/>
      <type value="group"/>
      <required value="false"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="The date and time this version of the observation was made available to providers, typically after the results have been reviewed and verified. For Observations that don&#x2019;t require review and verification, it may be the same as the [`lastUpdated` ](resource-definitions.html#Meta.lastUpdated) time of the resource itself.  For Observations that do require review and verification for certain updates, it might not be the same as the `lastUpdated` time of the resource itself due to a non-clinically significant update that doesn&#x2019;t require the new version to be reviewed and verified again."/>
        <type value="display"/>
      </item>
      <item>
        <linkId value="Observation.issued.value"/>
        <text value="Date/Time this version was made available"/>
        <type value="dateTime"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
        <valueString value="Reference"/>
      </extension>
      <linkId value="Observation.performer"/>
      <type value="group"/>
      <required value="false"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="Who was responsible for asserting the observed value as &quot;true&quot;."/>
        <type value="display"/>
      </item>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-allowedResource">
          <valueCode value="Practitioner, PractitionerRole, Organization, CareTeam, Patient, RelatedPerson"/>
        </extension>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-referenceFilter">
          <valueString value="subject=$subj&amp;patient=$subj&amp;encounter=$encounter"/>
        </extension>
        <linkId value="Observation.performer.value"/>
        <text value="Who is responsible for the observation"/>
        <type value="reference"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
        <valueInteger value="1"/>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
        <valueString value="Quantity"/>
      </extension>
      <linkId value="Observation.value[x]"/>
      <text value="Vital Signs value are recorded using the Quantity data type. For supporting observations such as Cuff size could use other datatypes such as CodeableConcept."/>
      <type value="group"/>
      <required value="false"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="Vital Signs value are recorded using the Quantity data type. For supporting observations such as Cuff size could use other datatypes such as CodeableConcept. An observation may have; 1)  a single value here, 2)  both a value and a set of related or component values,  or 3)  only a set of related or component values. If a value is present, the datatype for this element should be determined by Observation.code.  A CodeableConcept with just a text would be used instead of a string if the field was usually coded, or if the type associated with the Observation.code defines a coded value.  For additional guidance, see the [Notes section](observation.html#notes) below."/>
        <type value="display"/>
      </item>
      <item>
        <linkId value="Observation.value[x].comparator"/>
        <text value="comp:"/>
        <type value="choice"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
      <item>
        <linkId value="Observation.value[x].value"/>
        <text value="value:"/>
        <type value="decimal"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
      <item>
        <linkId value="Observation.value[x].units"/>
        <text value="units:"/>
        <type value="string"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
      <item>
        <linkId value="Observation.value[x].code"/>
        <text value="coded units:"/>
        <type value="string"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
      <item>
        <linkId value="Observation.value[x].system"/>
        <text value="units system:"/>
        <type value="string"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
        <valueInteger value="1"/>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
        <valueString value="CodeableConcept"/>
      </extension>
      <linkId value="Observation.dataAbsentReason"/>
      <text value="Why the result is missing"/>
      <type value="group"/>
      <required value="false"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="Provides a reason why the expected value in the element Observation.value[x] is missing. Null or exceptional values can be represented two ways in FHIR Observations.  One way is to simply include them in the value set and represent the exceptions in the value.  For example, measurement values for a serology test could be  &quot;detected&quot;, &quot;not detected&quot;, &quot;inconclusive&quot;, or  &quot;specimen unsatisfactory&quot;.   &#xA;&#xA;The alternate way is to use the value element for actual observations and use the explicit dataAbsentReason element to record exceptional values.  For example, the dataAbsentReason code &quot;error&quot; could be used when the measurement was not completed. Note that an observation may only be reported if there are values to report. For example differential cell counts values may be reported only when &gt; 0.  Because of these options, use-case agreements are required to interpret general observations for null or exceptional values."/>
        <type value="display"/>
      </item>
      <item>
        <linkId value="Observation.dataAbsentReason.coding"/>
        <text value="code:"/>
        <type value="open-choice"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
      <item>
        <linkId value="Observation.dataAbsentReason.text"/>
        <text value="text:"/>
        <type value="string"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
        <valueInteger value="1"/>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
        <valueString value="CodeableConcept"/>
      </extension>
      <linkId value="Observation.interpretation"/>
      <text value="High, low, normal, etc."/>
      <type value="group"/>
      <required value="false"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="The assessment made based on the result of the observation.  Intended as a simple compact code often placed adjacent to the result value in reports and flow sheets to signal the meaning/normalcy status of the result. Otherwise known as abnormal flag."/>
        <type value="display"/>
      </item>
      <item>
        <linkId value="Observation.interpretation.coding"/>
        <text value="code:"/>
        <type value="open-choice"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
      <item>
        <linkId value="Observation.interpretation.text"/>
        <text value="text:"/>
        <type value="string"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
        <valueInteger value="1"/>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
        <valueString value="string"/>
      </extension>
      <linkId value="Observation.comment"/>
      <type value="group"/>
      <required value="false"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="May include statements about significant, unexpected or unreliable values, or information about the source of the value where this may be relevant to the interpretation of the result."/>
        <type value="display"/>
      </item>
      <item>
        <linkId value="Observation.comment.value"/>
        <text value="Comments about result"/>
        <type value="string"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
        <valueInteger value="1"/>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
        <valueString value="CodeableConcept"/>
      </extension>
      <linkId value="Observation.bodySite"/>
      <text value="Observed body part"/>
      <type value="group"/>
      <required value="false"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="Indicates the site on the subject&#39;s body where the observation was made (i.e. the target site). Only used if not implicit in code found in Observation.code.  In many systems, this may be represented as a related observation instead of an inline component.   &#xA;&#xA;If the use case requires BodySite to be handled as a separate resource (e.g. to identify and track separately) then use the standard extension[ body-structure](extension-body-structure.html)."/>
        <type value="display"/>
      </item>
      <item>
        <linkId value="Observation.bodySite.coding"/>
        <text value="code:"/>
        <type value="open-choice"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
      <item>
        <linkId value="Observation.bodySite.text"/>
        <text value="text:"/>
        <type value="string"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
        <valueInteger value="1"/>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
        <valueString value="CodeableConcept"/>
      </extension>
      <linkId value="Observation.method"/>
      <text value="How it was done"/>
      <type value="group"/>
      <required value="false"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="Indicates the mechanism used to perform the observation. Only used if not implicit in code for Observation.code."/>
        <type value="display"/>
      </item>
      <item>
        <linkId value="Observation.method.coding"/>
        <text value="code:"/>
        <type value="open-choice"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
      <item>
        <linkId value="Observation.method.text"/>
        <text value="text:"/>
        <type value="string"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
        <valueInteger value="1"/>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
        <valueString value="Reference"/>
      </extension>
      <linkId value="Observation.specimen"/>
      <type value="group"/>
      <required value="false"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="The specimen that was used when this observation was made. Should only be used if not implicit in code found in `Observation.code`.  Observations are not made on specimens themselves; they are made on a subject, but in many cases by the means of a specimen. Note that although specimens are often involved, they are not always tracked and reported explicitly. Also note that observation resources may be used in contexts that track the specimen explicitly (e.g. Diagnostic Report)."/>
        <type value="display"/>
      </item>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-allowedResource">
          <valueCode value="Specimen"/>
        </extension>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-referenceFilter">
          <valueString value="subject=$subj&amp;patient=$subj&amp;encounter=$encounter"/>
        </extension>
        <linkId value="Observation.specimen.value"/>
        <text value="Specimen used for this observation"/>
        <type value="reference"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
        <valueInteger value="1"/>
      </extension>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
        <valueString value="Reference"/>
      </extension>
      <linkId value="Observation.device"/>
      <type value="group"/>
      <required value="false"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="The device used to generate the observation data. An extension should be used if further typing of the device is needed.  Devices used to support obtaining an observation can be represented using an extension or the [Provenance](provenance.html) resource. (e.g., a device gateway such as a smart phone)."/>
        <type value="display"/>
      </item>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-allowedResource">
          <valueCode value="Device, DeviceComponent, DeviceMetric"/>
        </extension>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-referenceFilter">
          <valueString value="subject=$subj&amp;patient=$subj&amp;encounter=$encounter"/>
        </extension>
        <linkId value="Observation.device.value"/>
        <text value="(Measurement) Device"/>
        <type value="reference"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
    </item>
    <item>
      <linkId value="Observation.referenceRange"/>
      <text value="Provides guide for interpretation"/>
      <type value="group"/>
      <required value="false"/>
      <repeats value="true"/>
      <item>
        <text value="Most observations only have one generic reference range. Systems MAY choose to restrict to only supplying the relevant reference range based on knowledge about the patient (e.g., specific to the patient&#39;s age, gender, weight and other factors), but this might not be possible or appropriate. Whenever more than one reference range is supplied, the differences between them SHOULD be provided in the reference range and/or age properties."/>
        <type value="display"/>
      </item>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="Guidance on how to interpret the value by comparison to a normal or recommended range."/>
        <type value="display"/>
      </item>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
          <valueInteger value="1"/>
        </extension>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
          <valueString value="string"/>
        </extension>
        <linkId value="Observation.referenceRange.id"/>
        <type value="group"/>
        <required value="false"/>
        <repeats value="true"/>
        <item>
          <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
            <valueCodeableConcept>
              <coding>
                <system value="http://hl7.org/fhir/questionnaire-item-control"/>
                <code value="flyover"/>
                <display value="Fly-over"/>
              </coding>
            </valueCodeableConcept>
          </extension>
          <text value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/>
          <type value="display"/>
        </item>
        <item>
          <linkId value="Observation.referenceRange.id.value"/>
          <text value="xml:id (or equivalent in JSON)"/>
          <type value="string"/>
          <required value="false"/>
          <repeats value="false"/>
        </item>
      </item>
      <item>
        <linkId value="Observation.referenceRange.extension"/>
        <text value="Additional content defined by implementations"/>
        <type value="group"/>
        <required value="false"/>
        <repeats value="true"/>
        <item>
          <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
            <valueCodeableConcept>
              <coding>
                <system value="http://hl7.org/fhir/questionnaire-item-control"/>
                <code value="flyover"/>
                <display value="Fly-over"/>
              </coding>
            </valueCodeableConcept>
          </extension>
          <text value="May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/>
          <type value="display"/>
        </item>
      </item>
      <item>
        <linkId value="Observation.referenceRange.modifierExtension"/>
        <text value="Extensions that cannot be ignored"/>
        <type value="group"/>
        <required value="false"/>
        <repeats value="true"/>
        <item>
          <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
            <valueCodeableConcept>
              <coding>
                <system value="http://hl7.org/fhir/questionnaire-item-control"/>
                <code value="flyover"/>
                <display value="Fly-over"/>
              </coding>
            </valueCodeableConcept>
          </extension>
          <text value="May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions. There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/>
          <type value="display"/>
        </item>
      </item>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
          <valueInteger value="1"/>
        </extension>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
          <valueString value="Quantity"/>
        </extension>
        <linkId value="Observation.referenceRange.low"/>
        <text value="Low Range, if relevant"/>
        <type value="group"/>
        <required value="false"/>
        <repeats value="true"/>
        <item>
          <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
            <valueCodeableConcept>
              <coding>
                <system value="http://hl7.org/fhir/questionnaire-item-control"/>
                <code value="flyover"/>
                <display value="Fly-over"/>
              </coding>
            </valueCodeableConcept>
          </extension>
          <text value="The value of the low bound of the reference range.  The low bound of the reference range endpoint is inclusive of the value (e.g.  reference range is &gt;=5 - &lt;=9). If the low bound is omitted,  it is assumed to be meaningless (e.g. reference range is &lt;=2.3)."/>
          <type value="display"/>
        </item>
        <item>
          <linkId value="Observation.referenceRange.low.comparator"/>
          <text value="comp:"/>
          <type value="choice"/>
          <required value="false"/>
          <repeats value="false"/>
        </item>
        <item>
          <linkId value="Observation.referenceRange.low.value"/>
          <text value="value:"/>
          <type value="decimal"/>
          <required value="false"/>
          <repeats value="false"/>
        </item>
        <item>
          <linkId value="Observation.referenceRange.low.units"/>
          <text value="units:"/>
          <type value="string"/>
          <required value="false"/>
          <repeats value="false"/>
        </item>
        <item>
          <linkId value="Observation.referenceRange.low.code"/>
          <text value="coded units:"/>
          <type value="string"/>
          <required value="false"/>
          <repeats value="false"/>
        </item>
        <item>
          <linkId value="Observation.referenceRange.low.system"/>
          <text value="units system:"/>
          <type value="string"/>
          <required value="false"/>
          <repeats value="false"/>
        </item>
      </item>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
          <valueInteger value="1"/>
        </extension>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
          <valueString value="Quantity"/>
        </extension>
        <linkId value="Observation.referenceRange.high"/>
        <text value="High Range, if relevant"/>
        <type value="group"/>
        <required value="false"/>
        <repeats value="true"/>
        <item>
          <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
            <valueCodeableConcept>
              <coding>
                <system value="http://hl7.org/fhir/questionnaire-item-control"/>
                <code value="flyover"/>
                <display value="Fly-over"/>
              </coding>
            </valueCodeableConcept>
          </extension>
          <text value="The value of the high bound of the reference range.  The high bound of the reference range endpoint is inclusive of the value (e.g.  reference range is &gt;=5 - &lt;=9). If the high bound is omitted,  it is assumed to be meaningless (e.g. reference range is &gt;= 2.3)."/>
          <type value="display"/>
        </item>
        <item>
          <linkId value="Observation.referenceRange.high.comparator"/>
          <text value="comp:"/>
          <type value="choice"/>
          <required value="false"/>
          <repeats value="false"/>
        </item>
        <item>
          <linkId value="Observation.referenceRange.high.value"/>
          <text value="value:"/>
          <type value="decimal"/>
          <required value="false"/>
          <repeats value="false"/>
        </item>
        <item>
          <linkId value="Observation.referenceRange.high.units"/>
          <text value="units:"/>
          <type value="string"/>
          <required value="false"/>
          <repeats value="false"/>
        </item>
        <item>
          <linkId value="Observation.referenceRange.high.code"/>
          <text value="coded units:"/>
          <type value="string"/>
          <required value="false"/>
          <repeats value="false"/>
        </item>
        <item>
          <linkId value="Observation.referenceRange.high.system"/>
          <text value="units system:"/>
          <type value="string"/>
          <required value="false"/>
          <repeats value="false"/>
        </item>
      </item>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
          <valueInteger value="1"/>
        </extension>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
          <valueString value="CodeableConcept"/>
        </extension>
        <linkId value="Observation.referenceRange.type"/>
        <text value="Reference range qualifier"/>
        <type value="group"/>
        <required value="false"/>
        <repeats value="true"/>
        <item>
          <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
            <valueCodeableConcept>
              <coding>
                <system value="http://hl7.org/fhir/questionnaire-item-control"/>
                <code value="flyover"/>
                <display value="Fly-over"/>
              </coding>
            </valueCodeableConcept>
          </extension>
          <text value="Codes to indicate the what part of the targeted reference population it applies to. For example, the normal or therapeutic range. This SHOULD be populated if there is more than one range.  If this element is not present then the normal range is assumed."/>
          <type value="display"/>
        </item>
        <item>
          <linkId value="Observation.referenceRange.type.coding"/>
          <text value="code:"/>
          <type value="open-choice"/>
          <required value="false"/>
          <repeats value="false"/>
        </item>
        <item>
          <linkId value="Observation.referenceRange.type.text"/>
          <text value="text:"/>
          <type value="string"/>
          <required value="false"/>
          <repeats value="false"/>
        </item>
      </item>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
          <valueString value="CodeableConcept"/>
        </extension>
        <linkId value="Observation.referenceRange.appliesTo"/>
        <text value="Reference range population"/>
        <type value="group"/>
        <required value="false"/>
        <repeats value="true"/>
        <item>
          <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
            <valueCodeableConcept>
              <coding>
                <system value="http://hl7.org/fhir/questionnaire-item-control"/>
                <code value="flyover"/>
                <display value="Fly-over"/>
              </coding>
            </valueCodeableConcept>
          </extension>
          <text value="Codes to indicate the target population this reference range applies to.  For example, a reference range may be based on the normal population or a particular sex or race. This SHOULD be populated if there is more than one range.  If this element is not present then the normal population is assumed."/>
          <type value="display"/>
        </item>
        <item>
          <linkId value="Observation.referenceRange.appliesTo.coding"/>
          <text value="code:"/>
          <type value="open-choice"/>
          <required value="false"/>
          <repeats value="false"/>
        </item>
        <item>
          <linkId value="Observation.referenceRange.appliesTo.text"/>
          <text value="text:"/>
          <type value="string"/>
          <required value="false"/>
          <repeats value="false"/>
        </item>
      </item>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
          <valueInteger value="1"/>
        </extension>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
          <valueString value="Range"/>
        </extension>
        <linkId value="Observation.referenceRange.age"/>
        <text value="Applicable age range, if relevant"/>
        <type value="group"/>
        <required value="false"/>
        <repeats value="true"/>
        <item>
          <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
            <valueCodeableConcept>
              <coding>
                <system value="http://hl7.org/fhir/questionnaire-item-control"/>
                <code value="flyover"/>
                <display value="Fly-over"/>
              </coding>
            </valueCodeableConcept>
          </extension>
          <text value="The age at which this reference range is applicable. This is a neonatal age (e.g. number of weeks at term) if the meaning says so."/>
          <type value="display"/>
        </item>
        <item>
          <linkId value="Observation.referenceRange.age.low"/>
          <text value="low:"/>
          <type value="decimal"/>
          <required value="false"/>
          <repeats value="false"/>
        </item>
        <item>
          <linkId value="Observation.referenceRange.age.high"/>
          <text value="high:"/>
          <type value="decimal"/>
          <required value="false"/>
          <repeats value="false"/>
        </item>
        <item>
          <linkId value="Observation.referenceRange.age.units"/>
          <text value="units:"/>
          <type value="string"/>
          <required value="false"/>
          <repeats value="false"/>
        </item>
      </item>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
          <valueInteger value="1"/>
        </extension>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
          <valueString value="string"/>
        </extension>
        <linkId value="Observation.referenceRange.text"/>
        <type value="group"/>
        <required value="false"/>
        <repeats value="true"/>
        <item>
          <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
            <valueCodeableConcept>
              <coding>
                <system value="http://hl7.org/fhir/questionnaire-item-control"/>
                <code value="flyover"/>
                <display value="Fly-over"/>
              </coding>
            </valueCodeableConcept>
          </extension>
          <text value="Text based reference range in an observation which may be used when a quantitative range is not appropriate for an observation.  An example would be a reference value of &quot;Negative&quot; or a list or table of &quot;normals&quot;."/>
          <type value="display"/>
        </item>
        <item>
          <linkId value="Observation.referenceRange.text.value"/>
          <text value="Text based reference range in an observation"/>
          <type value="string"/>
          <required value="false"/>
          <repeats value="false"/>
        </item>
      </item>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
        <valueString value="Reference"/>
      </extension>
      <linkId value="Observation.hasMember"/>
      <type value="group"/>
      <required value="false"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="Used when reporting vital signs panel components. When using this element, an observation will typically have either a value or a set of related resources, although both may be present in some cases.  For a discussion on the ways Observations can assembled in groups together, see [Notes](observation.html#obsgrouping) below."/>
        <type value="display"/>
      </item>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-allowedResource">
          <valueCode value="QuestionnaireResponse, Sequence, vitalsigns"/>
        </extension>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-referenceFilter">
          <valueString value="subject=$subj&amp;patient=$subj&amp;encounter=$encounter"/>
        </extension>
        <linkId value="Observation.hasMember.value"/>
        <text value="Used when reporting vital signs panel components"/>
        <type value="reference"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
    </item>
    <item>
      <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
        <valueString value="Reference"/>
      </extension>
      <linkId value="Observation.derivedFrom"/>
      <type value="group"/>
      <required value="false"/>
      <repeats value="true"/>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="The target resource that represents a measurement from which this observation value is derived. For example, a calculated anion gap or a fetal measurement based on an ultrasound image. All the reference choices that are listed in this element can represent clinical observations and other measurements that may be the source for a derived value.  The most common reference will be another Observation.  For a discussion on the ways Observations can assembled in groups together, see [Notes](observation.html#obsgrouping) below."/>
        <type value="display"/>
      </item>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-allowedResource">
          <valueCode value="DocumentReference, ImagingStudy, Media, QuestionnaireResponse, Sequence, vitalsigns"/>
        </extension>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-referenceFilter">
          <valueString value="subject=$subj&amp;patient=$subj&amp;encounter=$encounter"/>
        </extension>
        <linkId value="Observation.derivedFrom.value"/>
        <text value="Related measurements the observation is made from"/>
        <type value="reference"/>
        <required value="false"/>
        <repeats value="false"/>
      </item>
    </item>
    <item>
      <linkId value="Observation.component"/>
      <text value="Used when reporting systolic and diastolic blood pressure."/>
      <type value="group"/>
      <required value="false"/>
      <repeats value="true"/>
      <item>
        <text value="For a discussion on the ways Observations can be assembled in groups together see [Notes](observation.html#notes) below."/>
        <type value="display"/>
      </item>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
          <valueCodeableConcept>
            <coding>
              <system value="http://hl7.org/fhir/questionnaire-item-control"/>
              <code value="flyover"/>
              <display value="Fly-over"/>
            </coding>
          </valueCodeableConcept>
        </extension>
        <text value="Used when reporting systolic and diastolic blood pressure."/>
        <type value="display"/>
      </item>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
          <valueInteger value="1"/>
        </extension>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
          <valueString value="string"/>
        </extension>
        <linkId value="Observation.component.id"/>
        <type value="group"/>
        <required value="false"/>
        <repeats value="true"/>
        <item>
          <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
            <valueCodeableConcept>
              <coding>
                <system value="http://hl7.org/fhir/questionnaire-item-control"/>
                <code value="flyover"/>
                <display value="Fly-over"/>
              </coding>
            </valueCodeableConcept>
          </extension>
          <text value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/>
          <type value="display"/>
        </item>
        <item>
          <linkId value="Observation.component.id.value"/>
          <text value="xml:id (or equivalent in JSON)"/>
          <type value="string"/>
          <required value="false"/>
          <repeats value="false"/>
        </item>
      </item>
      <item>
        <linkId value="Observation.component.extension"/>
        <text value="Additional content defined by implementations"/>
        <type value="group"/>
        <required value="false"/>
        <repeats value="true"/>
        <item>
          <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
            <valueCodeableConcept>
              <coding>
                <system value="http://hl7.org/fhir/questionnaire-item-control"/>
                <code value="flyover"/>
                <display value="Fly-over"/>
              </coding>
            </valueCodeableConcept>
          </extension>
          <text value="May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/>
          <type value="display"/>
        </item>
      </item>
      <item>
        <linkId value="Observation.component.modifierExtension"/>
        <text value="Extensions that cannot be ignored"/>
        <type value="group"/>
        <required value="false"/>
        <repeats value="true"/>
        <item>
          <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
            <valueCodeableConcept>
              <coding>
                <system value="http://hl7.org/fhir/questionnaire-item-control"/>
                <code value="flyover"/>
                <display value="Fly-over"/>
              </coding>
            </valueCodeableConcept>
          </extension>
          <text value="May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions. There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/>
          <type value="display"/>
        </item>
      </item>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-minOccurs">
          <valueInteger value="1"/>
        </extension>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
          <valueInteger value="1"/>
        </extension>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
          <valueString value="CodeableConcept"/>
        </extension>
        <linkId value="Observation.component.code"/>
        <text value="Type of component observation (code / type)"/>
        <type value="group"/>
        <required value="true"/>
        <repeats value="true"/>
        <item>
          <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
            <valueCodeableConcept>
              <coding>
                <system value="http://hl7.org/fhir/questionnaire-item-control"/>
                <code value="flyover"/>
                <display value="Fly-over"/>
              </coding>
            </valueCodeableConcept>
          </extension>
          <text value="Describes what was observed. Sometimes this is called the observation &quot;code&quot;. *All* code-value and  component.code-component.value pairs need to be taken into account to correctly understand the meaning of the observation."/>
          <type value="display"/>
        </item>
        <item>
          <linkId value="Observation.component.code.coding"/>
          <text value="code:"/>
          <type value="open-choice"/>
          <required value="false"/>
          <repeats value="false"/>
        </item>
        <item>
          <linkId value="Observation.component.code.text"/>
          <text value="text:"/>
          <type value="string"/>
          <required value="false"/>
          <repeats value="false"/>
        </item>
      </item>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
          <valueInteger value="1"/>
        </extension>
        <linkId value="Observation.component.value[x]"/>
        <text value="Vital Sign Value recorded with UCUM"/>
        <type value="group"/>
        <required value="false"/>
        <repeats value="true"/>
        <item>
          <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
            <valueCodeableConcept>
              <coding>
                <system value="http://hl7.org/fhir/questionnaire-item-control"/>
                <code value="flyover"/>
                <display value="Fly-over"/>
              </coding>
            </valueCodeableConcept>
          </extension>
          <text value="Vital Sign Value recorded with UCUM. Used when observation has a set of component observations. An observation may have both a value (e.g. an  Apgar score)  and component observations (the observations from which the Apgar score was derived). If a value is present, the datatype for this element should be determined by Observation.code. A CodeableConcept with just a text would be used instead of a string if the field was usually coded, or if the type associated with the Observation.code defines a coded value.  For additional guidance, see the [Notes section](observation.html#notes) below."/>
          <type value="display"/>
        </item>
        <item>
          <linkId value="Observation.component.value[x]._type"/>
          <text value="type"/>
          <type value="choice"/>
          <required value="false"/>
          <repeats value="false"/>
          <options value="#vs3"/>
          <item>
            <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
              <valueString value="Quantity"/>
            </extension>
            <linkId value="Observation.component.value[x]._null"/>
            <type value="group"/>
            <item>
              <linkId value="Observation.component.value[x]._null.comparator"/>
              <text value="comp:"/>
              <type value="choice"/>
              <required value="false"/>
              <repeats value="false"/>
            </item>
            <item>
              <linkId value="Observation.component.value[x]._null.value"/>
              <text value="value:"/>
              <type value="decimal"/>
              <required value="false"/>
              <repeats value="false"/>
            </item>
            <item>
              <linkId value="Observation.component.value[x]._null.units"/>
              <text value="units:"/>
              <type value="string"/>
              <required value="false"/>
              <repeats value="false"/>
            </item>
            <item>
              <linkId value="Observation.component.value[x]._null.code"/>
              <text value="coded units:"/>
              <type value="string"/>
              <required value="false"/>
              <repeats value="false"/>
            </item>
            <item>
              <linkId value="Observation.component.value[x]._null.system"/>
              <text value="units system:"/>
              <type value="string"/>
              <required value="false"/>
              <repeats value="false"/>
            </item>
          </item>
          <item>
            <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
              <valueString value="CodeableConcept"/>
            </extension>
            <linkId value="Observation.component.value[x]._null"/>
            <type value="group"/>
            <item>
              <linkId value="Observation.component.value[x]._null.coding"/>
              <text value="code:"/>
              <type value="choice"/>
              <required value="false"/>
              <repeats value="false"/>
            </item>
            <item>
              <linkId value="Observation.component.value[x]._null.text"/>
              <text value="text:"/>
              <type value="string"/>
              <required value="false"/>
              <repeats value="false"/>
            </item>
          </item>
          <item>
            <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
              <valueString value="string"/>
            </extension>
            <linkId value="Observation.component.value[x]._null"/>
            <type value="group"/>
            <item>
              <linkId value="Observation.component.value[x]._null.value"/>
              <type value="string"/>
              <required value="false"/>
              <repeats value="false"/>
            </item>
          </item>
          <item>
            <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
              <valueString value="boolean"/>
            </extension>
            <linkId value="Observation.component.value[x]._null"/>
            <type value="group"/>
            <item>
              <linkId value="Observation.component.value[x]._null.value"/>
              <type value="boolean"/>
              <required value="false"/>
              <repeats value="false"/>
            </item>
          </item>
          <item>
            <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
              <valueString value="integer"/>
            </extension>
            <linkId value="Observation.component.value[x]._null"/>
            <type value="group"/>
            <item>
              <linkId value="Observation.component.value[x]._null.value"/>
              <type value="integer"/>
              <required value="false"/>
              <repeats value="false"/>
            </item>
          </item>
          <item>
            <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
              <valueString value="Range"/>
            </extension>
            <linkId value="Observation.component.value[x]._null"/>
            <type value="group"/>
            <item>
              <linkId value="Observation.component.value[x]._null.low"/>
              <text value="low:"/>
              <type value="decimal"/>
              <required value="false"/>
              <repeats value="false"/>
            </item>
            <item>
              <linkId value="Observation.component.value[x]._null.high"/>
              <text value="high:"/>
              <type value="decimal"/>
              <required value="false"/>
              <repeats value="false"/>
            </item>
            <item>
              <linkId value="Observation.component.value[x]._null.units"/>
              <text value="units:"/>
              <type value="string"/>
              <required value="false"/>
              <repeats value="false"/>
            </item>
          </item>
          <item>
            <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
              <valueString value="Ratio"/>
            </extension>
            <linkId value="Observation.component.value[x]._null"/>
            <type value="group"/>
            <item>
              <linkId value="Observation.component.value[x]._null.numerator"/>
              <text value="numerator:"/>
              <type value="decimal"/>
              <required value="false"/>
              <repeats value="false"/>
            </item>
            <item>
              <linkId value="Observation.component.value[x]._null.denominator"/>
              <text value="denominator:"/>
              <type value="decimal"/>
              <required value="false"/>
              <repeats value="false"/>
            </item>
            <item>
              <linkId value="Observation.component.value[x]._null.units"/>
              <text value="units:"/>
              <type value="string"/>
              <required value="false"/>
              <repeats value="false"/>
            </item>
          </item>
          <item>
            <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
              <valueString value="SampledData"/>
            </extension>
            <linkId value="Observation.component.value[x]._null"/>
            <type value="group"/>
          </item>
          <item>
            <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
              <valueString value="time"/>
            </extension>
            <linkId value="Observation.component.value[x]._null"/>
            <type value="group"/>
            <item>
              <linkId value="Observation.component.value[x]._null.value"/>
              <type value="time"/>
              <required value="false"/>
              <repeats value="false"/>
            </item>
          </item>
          <item>
            <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
              <valueString value="datetime"/>
            </extension>
            <linkId value="Observation.component.value[x]._null"/>
            <type value="group"/>
            <item>
              <linkId value="Observation.component.value[x]._null.value"/>
              <type value="dateTime"/>
              <required value="false"/>
              <repeats value="false"/>
            </item>
          </item>
          <item>
            <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
              <valueString value="Period"/>
            </extension>
            <linkId value="Observation.component.value[x]._null"/>
            <type value="group"/>
            <item>
              <linkId value="Observation.component.value[x]._null.low"/>
              <text value="start:"/>
              <type value="dateTime"/>
              <required value="false"/>
              <repeats value="false"/>
            </item>
            <item>
              <linkId value="Observation.component.value[x]._null.end"/>
              <text value="end:"/>
              <type value="dateTime"/>
              <required value="false"/>
              <repeats value="false"/>
            </item>
          </item>
        </item>
      </item>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
          <valueInteger value="1"/>
        </extension>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
          <valueString value="CodeableConcept"/>
        </extension>
        <linkId value="Observation.component.dataAbsentReason"/>
        <text value="Why the component result is missing"/>
        <type value="group"/>
        <required value="false"/>
        <repeats value="true"/>
        <item>
          <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
            <valueCodeableConcept>
              <coding>
                <system value="http://hl7.org/fhir/questionnaire-item-control"/>
                <code value="flyover"/>
                <display value="Fly-over"/>
              </coding>
            </valueCodeableConcept>
          </extension>
          <text value="Provides a reason why the expected value in the element Observation.component.value[x] is missing. &quot;Null&quot; or exceptional values can be represented two ways in FHIR Observations.  One way is to simply include them in the value set and represent the exceptions in the value.  For example, measurement values for a serology test could be  &quot;detected&quot;, &quot;not detected&quot;, &quot;inconclusive&quot;, or  &quot;test not done&quot;. &#xA;&#xA;The alternate way is to use the value element for actual observations and use the explicit dataAbsentReason element to record exceptional values.  For example, the dataAbsentReason code &quot;error&quot; could be used when the measurement was not completed.  Because of these options, use-case agreements are required to interpret general observations for exceptional values."/>
          <type value="display"/>
        </item>
        <item>
          <linkId value="Observation.component.dataAbsentReason.coding"/>
          <text value="code:"/>
          <type value="open-choice"/>
          <required value="false"/>
          <repeats value="false"/>
        </item>
        <item>
          <linkId value="Observation.component.dataAbsentReason.text"/>
          <text value="text:"/>
          <type value="string"/>
          <required value="false"/>
          <repeats value="false"/>
        </item>
      </item>
      <item>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs">
          <valueInteger value="1"/>
        </extension>
        <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-fhirType">
          <valueString value="CodeableConcept"/>
        </extension>
        <linkId value="Observation.component.interpretation"/>
        <text value="High, low, normal, etc."/>
        <type value="group"/>
        <required value="false"/>
        <repeats value="true"/>
        <item>
          <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
            <valueCodeableConcept>
              <coding>
                <system value="http://hl7.org/fhir/questionnaire-item-control"/>
                <code value="flyover"/>
                <display value="Fly-over"/>
              </coding>
            </valueCodeableConcept>
          </extension>
          <text value="The assessment made based on the result of the observation.  Intended as a simple compact code often placed adjacent to the result value in reports and flow sheets to signal the meaning/normalcy status of the result. Otherwise known as abnormal flag. The component interpretation applies only to the individual component value.  For an overall interpretation all components together use the Observation.interpretation element."/>
          <type value="display"/>
        </item>
        <item>
          <linkId value="Observation.component.interpretation.coding"/>
          <text value="code:"/>
          <type value="open-choice"/>
          <required value="false"/>
          <repeats value="false"/>
        </item>
        <item>
          <linkId value="Observation.component.interpretation.text"/>
          <text value="text:"/>
          <type value="string"/>
          <required value="false"/>
          <repeats value="false"/>
        </item>
      </item>
      <item>
        <linkId value="Observation.component.referenceRange"/>
        <text value="Provides guide for interpretation of component result"/>
        <type value="group"/>
        <required value="false"/>
        <repeats value="true"/>
        <item>
          <text value="Most observations only have one generic reference range. Systems MAY choose to restrict to only supplying the relevant reference range based on knowledge about the patient (e.g., specific to the patient&#39;s age, gender, weight and other factors), but this might not be possible or appropriate. Whenever more than one reference range is supplied, the differences between them SHOULD be provided in the reference range and/or age properties."/>
          <type value="display"/>
        </item>
        <item>
          <extension url="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl">
            <valueCodeableConcept>
              <coding>
                <system value="http://hl7.org/fhir/questionnaire-item-control"/>
                <code value="flyover"/>
                <display value="Fly-over"/>
              </coding>
            </valueCodeableConcept>
          </extension>
          <text value="Guidance on how to interpret the value by comparison to a normal or recommended range."/>
          <type value="display"/>
        </item>
      </item>
    </item>
  </item>
</Questionnaire>

Usage note: every effort has been made to ensure that the examples are correct and useful, but they are not a normative part of the specification.