If you're just going to use a type once, you can omit the cross reference between the element and the type.
The only difference between an anonymous type and a named type is that a named type can be used more than once.
whereas the anonymous type can only be used for the element in which it is contained.
targetNamespace="http://www.rntsoft.com" xmlns="http://www.rntsoft.com"
elementFormDefault="qualified">