test Units of length for list datatype test Units of length for hexBinary datatype. test hexBinary datatype test Units of length for hexBinary datatype test Units of length for base64Binary datatype. test base64Binary datatype test Units of length for list datatype Unions with no member types (and thus with empty value space and lexical space) are now explicitly allowed. use of the namespace http://www.w3.org/2001/XMLSchema-datatypes has been deprecated.