[Zope] Current item in a dtml tree

How do I get the current object from a dtml tree? With dtml-in, I can use sequence-item, but that doesn't work with the tree. The situation is that I'm using an external method to return a list, and then I want to do certain actions with the current object in the list. Any ideas? TIA, Tommy Innovation: The Best Way To Predict The Future ... Is To Create It.