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The study metadata includes a CodeList with the list of support null flavor values.  The CodeListItem definitions provide the Null Flavor codes as the CodedValue attribute. The Decode provides a value that could be displayed on a CRF or in an analysis display. Refer to Coding.

Code Block
languagexml
titleNull Flavor Subset Codelist Definition
linenumberstrue
<MetaDataVersion OID="ODMV2.MDV.NF">
    <CodeList OID="STUDY.CL.NullReasonCodelist" Name="NullFlavorValueSubset" DataType="text">
        <CodeListItem CodedValue="MSK">
            <Decode>
                <TranslatedText xml:lang="en">Masked</TranslatedText>
            </Decode>
        </CodeListItem>
        <CodeListItem CodedValue="NAV">
            <Decode>
                <TranslatedText>Temporarily unavailable</TranslatedText>
            </Decode>
        </CodeListItem>
        <CodeListItem CodedValue="NI">
            <Decode>
                <TranslatedText>No Data Present</TranslatedText>
            </Decode>
        </CodeListItem>
        <Coding Code="V3 Null Flavor Value Set" System="https://terminology.hl7.org/2.0.0/ValueSet-v3-NullFlavor.html"
            SystemName="v3.NullFlavor" SystemVersion="2018-08-12"/>
    </CodeList>
</MetaDataVersion>

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