[xsd-users] Schema and inheritance

[Vera Mickael]

Hi,

I have another question about schema and inheritance :

I have problems with the code generated by JAXB when we use 
inheritance in our schemas.

Tell me if I'm wrong but I think inheritance is not really 
supported by schema. Suppose I define an element type A and 
another one B that extends A and another one C that extends 
A. In my schema if I define another element type X that 
contains A, I can't use B or C in an XML file instead of A 
in an element of type X.

So we use another element type that is a choice between B 
and C, and wherever we want B or C in the schema we use the 
choice. The generated code is very ugly, we obtain something 
close to a union in C langage.

How does xsd handle this problem ? I want to describe a 
model with two or more classes that extend a class, what is 
important to me is the quality of the generated code, 
polymorphism in this case.

Mickaël