UBL-QualifiedDatatypes-2.0.xsd

[CTD20]	A ccts:QualifiedDataType MUST be based on an unqualified data type and add some semantic and/or technical restriction to the unqualified data type.

[CTD23]	Every qualified datatype based on an unqualified datatype xsd:complexType whose supplementary components do not map directly to the properties of an XSD built-in data type
		    MUST be defined as an xsd:complexType
		    MUST contain one xsd:simpleContent element
		    MUST contain one xsd:restriction element
		    MUST include the unqualified datatype as its xsd:base attribute
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NOTE:  MUST contain one xsd:restriction element
            MUST include the unqualified datatype as its xsd:base attribute

As currently implemented, the type definitions have

    <xsd:extension base="xsd:normalizedString">

rather than

    <xsd:restriction base="udt:CodeType">


Thanks,
Mike