From: leigh@i42.co.uk   
      
   Hi,   
      
   I present a free to use/modify C++ "tree" container that is so named   
   because it can represent a general hierarchical collection of elements   
   using a tree-like structure.  Examples of things which use such general   
   tree-like structures include file systems, XML elements in an XML   
   document or the items in a GUI tree control or menu. The C++ Standard   
   Library includes containers which use a binary (2-ary) search tree as   
   their underlying data structure (std::set, std::multiset, std::map and   
   std::multimap) but their interfaces are designed for accessing the   
   elements as an ordered sequence of elements with no hierarchy and do not   
   provide direct access to the underlying tree data structure; tree on the   
   other hand provides an interface for accessing the (non-fixed-ary) tree   
   directly allowing siblings to be iterated, parent elements to be   
   determined etc.   
      
   http://i42.co.uk/stuff/tree.htm   
      
   /Leigh   
      
      
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