no, there is no "real" documentation.
the CHM is getting little overflowing already, so it's usability has dropped significantly.
you could check on msdn, as the same rules basically should work in KF (not all working though)

as far as I know, what you are looking actually is the path-property.
instead of browsing each parent to the root, you could get with one call all parents of the node.

anyways, IIRC, the path is not working in KF yet.
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