Hey, guys. For what it's worth, I got a simple StructuredDocument ZClass to work, even when used as index_html. Here's how: I created a Python product called StructuredDocumentBase that included a class of the same name. This class is defined as follows: from OFS.DTMLDocument import DTMLDocument from StructuredText.StructuredText import html_with_references class StructuredDocumentBase: """Mix-in for StructuredDocument ZClass.""" def __call__(self, client = None, REQUEST = {}, RESPONSE = None, **kw): """Render the document given a client object, REQUEST mapping, response, and keyword arguments.""" header = apply(self.standard_html_header.__call__, (client, REQUEST), kw) body = html_with_references(apply(DTMLDocument.__call__, (self, client, REQUEST), kw)) footer = apply(self.standard_html_footer.__call__, (client, REQUEST), kw) return '%s%s%s' % (header, body, footer) Then, I created another product called StructuredDocument, this time through the web. In this product, I created a ZClass called StructuredDocument, which inherits first from StructuredDocumentBase and then from DTMLDocument. Then, I placed an instance in a folder, navigated to the URL, and it worked. I would package it up and upload it as a product, but a part of it is broken--I can't rename the instance. This has nothing to do (AFAICT) with the __call__ voodoo above, but seems to be due to my inheriting from DTMLDocument; I created a simple ZClass that did nothing except inherit from DTMLDocument and it exhibited the same behavior. Anyways, Tres (or anyone using Tres's product), if you want to take this idea and integrate it into your STX_Document class that'd be cool. If not, I'll make a more complete (and tested) implementation when I can find the time. Hope this helps, --Jeff --- Jeff K. Hoffman 704.849.0731 x108 Chief Technology Officer mailto:jeff@goingv.com Going Virtual, L.L.C. http://www.goingv.com/