[Zope] HTML / site validation

[Stefan Hoffmeister]

How should one validate the HTML produced by Zope?

An external validator on the site? But that pinpoints only the problem at
the macroscopic level, not at the Zope document or product (i.e.
microscopic) level?

I would like to validate individual Zope documents. The problem I mainly
have is that Tidy doesn't know the DTML markup - meaning that I cannot use
the validation and cleaning (!) services offered by Tidy on Zope
"snippets" (documents, methods, ...)

My interest in Zope is in modularizing a site, making it more maintainable
this way - much in the same way as a source base in any OOPL is
modularized into classes, I would like to accomplish the same with
*content* on a web site. I do not seem to have found the key to gaining
both modularity *and* robustness with Zope.