<status value="active"/> <experimental value="false"/> <date value="2014-03-26"/> <description value="**Description:** Subset of null flavors, used for associations as needed for the ITS, and used in InfrastructureRoot."/> <compose> <include> <system value="http://terminology.hl7.org/CodeSystem/v3-NullFlavor"/> <concept> <code value="ASKU"/> </concept> <concept> <code value="MSK"/> </concept> <concept> <code value="NA"/> </concept> <concept> <code value="NASK"/> </concept> <concept> <code value="NAV"/> </concept> <concept> <code value="NI"/> </concept> <concept> <code value="UNK"/> </concept> </include> </compose> </ValueSet>

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