It seems to me that it would be a Cool Thing to be able to take two Zope XML export files, say from different days, and feed it into something that would read the two, and produce a "change file" which specifies what has changed (think "diff" for XML). This would be useful for ZClass based packages, and making new versions of same. Tracking what's done on a site on a day-by-day basis (something that would produce a list at the end of the day showing exactly what changed, and where). Just doing a diff of the XML files is one extraordinarily yucky way to do this, but it's not exactly easy to then reapply that as a patch. Something that walked through the files would be more useful... thoughts? A little bird told me that people are already considering something for this task... any ideas? would the XML folks have already put something like this together? Anthony