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This is a frozen snapshot of the FHIR specification created for the purpose of balloting the GAO implementation Guide. It includes draft changes that may be part of the future DSTU 2.1 release but further change is expected. Readers should focus solely on the GAO implementation content, and FHIR DSTU 2 for other purposes.
Valueset-item-type.xml

Raw XML (canonical form)
Definition for Value SetQuestionnaireItemType
<ValueSet xmlns="http://hl7.org/fhir">
  <id value="item-type"/>
  <meta>
    <lastUpdated value="2015-12-03T09:57:31.744+11:00"/>
    <profile value="http://hl7.org/fhir/StructureDefinition/valueset-shareable-definition"/>
  </meta>
  <text>
    <status value="generated"/>
    <div xmlns="http://www.w3.org/1999/xhtml">
      <h2>QuestionnaireItemType</h2>
      <p>Distinguishes groups from questions and display text and indicates data type for questions</p>
      <p>This value set has an inline code system http://hl7.org/fhir/item-type, which defines
         the following codes:</p>
      <table class="codes">
        <tr>
          <td>
            <b>Lvl</b>
          </td>
          <td>
            <b>Code</b>
          </td>
          <td>
            <b>Display</b>
          </td>
          <td>
            <b>Definition</b>
          </td>
        </tr>
        <tr>
          <td>1</td>
          <td>group
            <a name="group"> </a>
          </td>
          <td>Group</td>
          <td>An item with no direct answer but which has descendant items that are questions</td>
        </tr>
        <tr>
          <td>1</td>
          <td>display
            <a name="display"> </a>
          </td>
          <td>Display</td>
          <td>Text for display that will not capture an answer or have descendants</td>
        </tr>
        <tr>
          <td>1</td>
          <td>question
            <a name="question"> </a>
          </td>
          <td>Question</td>
          <td>An item that defines a specific answer to be captured (and may have descendant items)</td>
        </tr>
        <tr>
          <td>2</td>
          <td>  boolean
            <a name="boolean"> </a>
          </td>
          <td>Boolean</td>
          <td>Question with a yes/no answer</td>
        </tr>
        <tr>
          <td>2</td>
          <td>  decimal
            <a name="decimal"> </a>
          </td>
          <td>Decimal</td>
          <td>Question with is a real number answer</td>
        </tr>
        <tr>
          <td>2</td>
          <td>  integer
            <a name="integer"> </a>
          </td>
          <td>Integer</td>
          <td>Question with an integer answer</td>
        </tr>
        <tr>
          <td>2</td>
          <td>  date
            <a name="date"> </a>
          </td>
          <td>Date</td>
          <td>Question with adate answer</td>
        </tr>
        <tr>
          <td>2</td>
          <td>  dateTime
            <a name="dateTime"> </a>
          </td>
          <td>Date Time</td>
          <td>Question with a date and time answer</td>
        </tr>
        <tr>
          <td>2</td>
          <td>  instant
            <a name="instant"> </a>
          </td>
          <td>Instant</td>
          <td>Question with a system timestamp answer</td>
        </tr>
        <tr>
          <td>2</td>
          <td>  time
            <a name="time"> </a>
          </td>
          <td>Time</td>
          <td>Question with a time (hour/minute/second) answer independent of date.</td>
        </tr>
        <tr>
          <td>2</td>
          <td>  string
            <a name="string"> </a>
          </td>
          <td>String</td>
          <td>Question with a short (few words to short sentence) free-text entry answer</td>
        </tr>
        <tr>
          <td>2</td>
          <td>  text
            <a name="text"> </a>
          </td>
          <td>Text</td>
          <td>Question with a long (potentially multi-paragraph) free-text entry (still captured as
             a string) answer</td>
        </tr>
        <tr>
          <td>2</td>
          <td>  url
            <a name="url"> </a>
          </td>
          <td>Url</td>
          <td>Question with a url (website, FTP site, etc.) answer</td>
        </tr>
        <tr>
          <td>2</td>
          <td>  choice
            <a name="choice"> </a>
          </td>
          <td>Choice</td>
          <td>Question with a Coding drawn from a list of options as an answer</td>
        </tr>
        <tr>
          <td>2</td>
          <td>  open-choice
            <a name="open-choice"> </a>
          </td>
          <td>Open Choice</td>
          <td>Answer is a Coding drawn from a list of options or a free-text entry captured as Coding.display</td>
        </tr>
        <tr>
          <td>2</td>
          <td>  attachment
            <a name="attachment"> </a>
          </td>
          <td>Attachment</td>
          <td>Question with binary content such as a image, PDF, etc. as an answer</td>
        </tr>
        <tr>
          <td>2</td>
          <td>  reference
            <a name="reference"> </a>
          </td>
          <td>Reference</td>
          <td>Question with a reference to another resource (practitioner, organization, etc.) as an
             answer</td>
        </tr>
        <tr>
          <td>2</td>
          <td>  quantity
            <a name="quantity"> </a>
          </td>
          <td>Quantity</td>
          <td>Question with a combination of a numeric value and unit, potentially with a comparator
             (&lt;, &gt;, etc.) as an answer.</td>
        </tr>
      </table>
    </div>
  </text>
  <extension url="http://hl7.org/fhir/StructureDefinition/valueset-oid">
    <valueUri value="urn:oid:2.16.840.1.113883.4.642.2.0"/>
  </extension>
  <url value="http://hl7.org/fhir/ValueSet/item-type"/>
  <version value="1.1.0"/>
  <name value="QuestionnaireItemType"/>
  <status value="draft"/>
  <experimental value="false"/>
  <publisher value="HL7 (FHIR Project)"/>
  <contact>
    <telecom>
      <system value="other"/>
      <value value="http://hl7.org/fhir"/>
    </telecom>
    <telecom>
      <system value="email"/>
      <value value="fhir@lists.hl7.org"/>
    </telecom>
  </contact>
  <date value="2015-12-03T09:57:31+11:00"/>
  <description value="Distinguishes groups from questions and display text and indicates data type for questions"/>
  <codeSystem>
    <extension url="http://hl7.org/fhir/StructureDefinition/valueset-oid">
      <valueUri value="urn:oid:2.16.840.1.113883.4.642.1.0"/>
    </extension>
    <system value="http://hl7.org/fhir/item-type"/>
    <version value="1.1.0"/>
    <caseSensitive value="true"/>
    <concept>
      <code value="group"/>
      <display value="Group"/>
      <definition value="An item with no direct answer but which has descendant items that are questions"/>
    </concept>
    <concept>
      <code value="display"/>
      <display value="Display"/>
      <definition value="Text for display that will not capture an answer or have descendants"/>
    </concept>
    <concept>
      <code value="question"/>
      <abstract value="true"/>
      <display value="Question"/>
      <definition value="An item that defines a specific answer to be captured (and may have descendant items)"/>
      <concept>
        <code value="boolean"/>
        <display value="Boolean"/>
        <definition value="Question with a yes/no answer"/>
      </concept>
      <concept>
        <code value="decimal"/>
        <display value="Decimal"/>
        <definition value="Question with is a real number answer"/>
      </concept>
      <concept>
        <code value="integer"/>
        <display value="Integer"/>
        <definition value="Question with an integer answer"/>
      </concept>
      <concept>
        <code value="date"/>
        <display value="Date"/>
        <definition value="Question with adate answer"/>
      </concept>
      <concept>
        <code value="dateTime"/>
        <display value="Date Time"/>
        <definition value="Question with a date and time answer"/>
      </concept>
      <concept>
        <code value="instant"/>
        <display value="Instant"/>
        <definition value="Question with a system timestamp answer"/>
      </concept>
      <concept>
        <code value="time"/>
        <display value="Time"/>
        <definition value="Question with a time (hour/minute/second) answer independent of date."/>
      </concept>
      <concept>
        <code value="string"/>
        <display value="String"/>
        <definition value="Question with a short (few words to short sentence) free-text entry answer"/>
      </concept>
      <concept>
        <code value="text"/>
        <display value="Text"/>
        <definition value="Question with a long (potentially multi-paragraph) free-text entry (still captured as
         a string) answer"/>
      </concept>
      <concept>
        <code value="url"/>
        <display value="Url"/>
        <definition value="Question with a url (website, FTP site, etc.) answer"/>
      </concept>
      <concept>
        <code value="choice"/>
        <display value="Choice"/>
        <definition value="Question with a Coding drawn from a list of options as an answer"/>
      </concept>
      <concept>
        <code value="open-choice"/>
        <display value="Open Choice"/>
        <definition value="Answer is a Coding drawn from a list of options or a free-text entry captured as Coding.display"/>
      </concept>
      <concept>
        <code value="attachment"/>
        <display value="Attachment"/>
        <definition value="Question with binary content such as a image, PDF, etc. as an answer"/>
      </concept>
      <concept>
        <code value="reference"/>
        <display value="Reference"/>
        <definition value="Question with a reference to another resource (practitioner, organization, etc.) as an
         answer"/>
      </concept>
      <concept>
        <code value="quantity"/>
        <display value="Quantity"/>
        <definition value="Question with a combination of a numeric value and unit, potentially with a comparator
         (&lt;, &gt;, etc.) as an answer."/>
      </concept>
    </concept>
  </codeSystem>
</ValueSet>
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.