store class diagram as XML

[name08]

hi everyone...
i am making a class diagram and want to store the information of class diagram in an XML file....can anyone please tell me how do i store the association,agg reagation,inher itance between different classes in the following XML / any other XML

<?xml version="1.0" encoding="UTF-8"?>
<classdiag>
<class id="1">
<name>custome r</name>
<operation>rese rvation of tour</operation>
<operation>vi ew tour data</operation>
</class>

<class id="2">
<name>employe e</name>
<operation>acce ss</operation>
<operation>upda te</operation>
</class>
</classdiag>

[jkmyoung]

This can really be done multiple ways depending on how you want to do it.
Imbricated relationships:
Eg main class: -> subclasses
[code=xml]
<object>
<shape>
<circle/>
<oval/>
<polygon>
<triangle/>
<quadrilatera l/>
<pentagon/>
</polygon>
</shape>
</object>
[/code]

Relations, like in databases:
[code=txt]
<relation superclass="1" subclass="2"/>
<relation superclass="5" subclass="7"/>
<relation superclass="7" subclass="8"/>
<relation superclass="5" subclass="6"/>
<relation superclass="1" subclass="4"/>
<relation superclass="4" subclass="5"/>
[/code]