Quick suggestion…
Can you map to something like this? <AChildRecord> Min=1, Max=1, <Child> Min=1, Max=unbounded.
<Top>
<AChildRecord>
<Child>
<SomeElement />
<Data></Data><MoreData></MoreData><AChildRecord>
<SomeOtherElement />
</Child>
<Child>
<SomeElement />
<Data></Data><MoreData></MoreData><AChildRecord>
<SomeOtherElement />
</Child>
</Top>