<xs:simpleTypename="ST_ID"xmlns:xs="http://www.w3.org/2001/XMLSchema"><xs:annotation><xs:documentation>
Specifies the custom ID of a control.
</xs:documentation></xs:annotation><xs:restrictionbase="xs:NCName"><xs:minLengthvalue="1"/><xs:maxLengthvalue="1024"/></xs:restriction></xs:simpleType>