refer existing object at xml import

[Kristian Kalweit]

Hi,

I use the example code of the documentation to import objects from a xml
file. Working probably.

Problem occur if I want to refer an existing object. Example:

First part importing 2 objects (object2 is nested into object1). Working so
far. Second part importing another object1 and refer object2 from first
part. This is not working. How can I do this?

<!-- First part -->
<object1>
    <object2>
        <idprop>123</idprop>
        <prop1>test</prop1>
        <prop2>test</prop2>
        ...
    </object2>
    <prop1>test</prop1>
    ...
</object1>
...
<!-- Second part -->
<object1>
    <object2>
        <idprop>123</idprop>
    </object2>
    <prop1>test</prop1>
    ...
</object1>