Maybe you can take a look at the MeSH browser of PubMed. It's fairly intuitive, anybody who can click can use that browser. If you click on a child with multiple parents, you get a list of those parents so that you can go upwards again.

You can find it here (example purely coincidence).

HTH,

Jeroen
"We are not alone"(FZ)

In reply to Re: Representing the result of a node search in HTML by jeroenes
in thread Representing the result of a node search in HTML by merlyn

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