<xs:simpleType name="number-or-empty"><xs:annotation><xs:documentation>The number-or-normal values can be either a decimal number or an empty string. This is used for the content of the ensemble element.</xs:documentation></xs:annotation><xs:union memberTypes="xs:decimal"><xs:simpleType><xs:restriction base="xs:string"><xs:enumeration value=""/></xs:restriction></xs:simpleType></xs:union></xs:simpleType>