XML List based on the union type defined above. An element declared with this type contains a space-separated list of double
values with null values interspersed as needed
<simpleType name="doubleOrNullList"><annotation><documentation>XML List based on the union type defined above. An element declared with this type contains a space-separated list of double values with null values interspersed as needed</documentation></annotation><list itemType="gml:doubleOrNull"/></simpleType>