mdex:boolean property values are useful for tracking true/false conditions.
Note that true and false are case sensitive and must be specified in lower case.
<ns:ingestChanges>
<ns:updateRecords>
<ns:recordSpecifier>FactSalesID='492'</ns:recordSpecifier>
<ns:addAssignments>
<ns1:attribute name="IsInStock" type="mdex:boolean">true</ns1:attribute>
<ns1:attribute name="IsActive" type="mdex:boolean">1</ns1:attribute>
</ns:addAssignments>
</ns:updateRecords>
</ns:ingestChanges>
In the example, both properties (isInStock and isActive) are set to true.