[Zope] dtml-tree with data from multiple tables

I'd like to generate a tree with data from different SQL tables depending on the tree level. In other words, the first level data comes from one table, second level comes from another. How can the branches_expr expression determine what the current tree level is? Can I pass a parameter to let

Re: [Zope] dtml-tree with data from multiple tables

I'd like to generate a tree with data from different SQL tables depending on the tree level. In other words, the first level data comes from one table, second level comes from another. How can the branches_expr expression determine what the current tree level is? Can I pass a parameter to