[plt-scheme] Tree structure in Scheme

Hi,

If I want to implement a tree-type hierarchy, what is the
suggested
data structure? I would like to know who the parent is who the 
children are, so walking up and down, and I also would like
to access
to the leaves directly, not always through the root.

I am looking for suggestions or a documentation or a
discussion about it.
Thanks,

Peter Ivanyi




_______________________________________________________________________________
Most kényelmesebben és gyorsabban kaphat útbaigazítást a T-Online Térkép és Útvonaltervező segítségével!
http://terkep.t-online.hu