generating XML file issue

Hello everyone,

I want to generate an XML file like below. My confusion is what technologies could I use to concatenate all information into a single XML document.

The root confusion is, I have a class called teacher which matches the teacher sub-section (ID, name and major) -- which I could use serialization technologies to generate teacher part XML information.

For other parts, like department, I also have a class to represent the information -- I could also use serialization technologies to serialize the information to XML -- but it has no relationship between teachers. So, my confusion is, how to concatenate different parts altogether, like department, club and teachers, and also make the whole XML document looks like below to reflect the relationships and hierarchies between them?

[Code]


 
    San Jose
    Computer Science
 
   
     
        Football
     
     
        Basketball
     
   
   
     
        Thomas
        Algorithm
     
     
        Zhou
        Linear Programming
     
   

[/Code]

thanks in advance,
George