(Please CC: me on responses.) I have a DTML Method (build_navigation_bar) that is called from standard_html_header to (surprise) build a navigation bar. standard_html_header invokes it thusly: <dtml-var "build_navigation_sidebar(start=_['foo'], parents=PARENTS)"> where foo is the top of the tree; standard_html_header can be acquired further down in the tree. parents is initialized to PARENTS, which is the list of parents of the original object. build_navigation_bar invokes itself on Folders that it finds that are among the parents of the original object. I.e., this is somewhat like a tree, but we only want to expand the branch we're in. This is done with: <dtml-in "start.objectValues(['Folder'])" sort=public skip_unauthorized> <dtml-with sequence-item> <dtml-if "hasProperty('public') and public"> <A HREF="<dtml-var absolute_url>"><dtml-var title_or_id></A><BR> <!-- this() in parents == <dtml-var "this() in parents"> == <dtml-var this> in <dtml-var parents> --> <dtml-if "this() in parents"> <!-- recursing --> <dtml-var "build_navigation_sidebar(start=this(), parents=parents)"> </dtml-if> </dtml-if> </dtml-with> </dtml-in> Unfortunately, this doesn't work: The conditional is always false. Some of the debugging output: <!-- this() in parents == 0 == <Folder instance at 89d9850> in [<Folder instance at 87b2cc8>, <Folder instance at 8a22420>, <Application instance at 87b9158>] --> <!-- this() in parents == 0 == <Folder instance at 87b2cc8> in [<Folder instance at 87b2cc8>, <Folder instance at 8a22420>, <Application instance at 87b9158>] --> Note that in the first line, the expression correctly evaluates to 0, while the second line incorrectly evaluates to 0. Using <dtml-var "this()"> should not, and does not, make a difference. Initializing parents with a copy of PARENTS (PARENTS[:]) does not make a difference, as expected. Direct comparisons, i.e. <dtml-var "this() is parents[0]"> (or ==) also fail. What did I overlook, because this seems like it ought to work. -- andy dustman | programmer/analyst | comstar.net, inc. telephone: 770.485.6025 / 706.549.7689 | icq: 32922760 | pgp: 0xc72f3f1d "Therefore, sweet knights, if you may doubt your strength or courage, come no further, for death awaits you all, with nasty, big, pointy teeth!"