Straight tot he points:
1) In the current version of the control there is no way to have a larger structure of nodes on the same level when you have single binding. In such scenarios we kindly recommend using group enabled binding and then using the column count property to keep the nodes together.
2) Unfortunately at the moment there is no such server-side functionality that will allow you to drill down to a node or retrieve hierarchical string but we have it in out to do list for some of the upcoming releases.
Hope this information will be helpful.
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