How do you use the sort attribute in a <dtml-in catalog> statement for a Zcatalog search report? I tried using <dtml-in catalog size=50 start=query_start sort=sortkey>, where sortkey is an input value from a Zcatalog search form that provides the name of one of the properties to sort on, but I get an AttributeError on sortkey. It works fine if I just enter the property name (e.g., id), and I get a true condition when I try <dtml-if "REQUEST.form.has_key('sortkey')"> and I can print out the value correctly, so I know the value is making it from the search form. This is probably one of those variable formatting syntax gotchas that I (as a new user) am missing. It'd be nice if I could find a detailed syntax for variable expression. You know, something that tells you when to use _[] or _[_[]], and what type of quotes (' or ") to use and when. Does something like this exist, or is it just Python syntax (meaning I should pick up a Python book)? Thanks. Chris Fassnacht