multi-multifield in asset metadata schema

Hi guys,

Has anyone tried to input/display asset metadata that looks like this (in xml):

<parent>

    <child>

        <text>value1</text>

        <text>value2</text>

    </child>

    <child2>

        <text>value3></text>

    </child2>

</parent>

I'm currently having to sandwich all these values into string arrays, not only for display but also for the asset search to work. Example:

parent="[child: value1\,value2, child2: value3]"

The display doesn't look very nice on the metadata schema but at least the search predicates work when pointed to "parent". 

Is there a better way of displaying this and have the search predicates work on it as well?