> Why does the url grow ( something like a/b/a/b/a/b/a//b/a/b )? and what > can be done to prevent it? This is the danger of using relative references within Zope. If you use absolute_urls to reference an object, then the URL will be the shortest path to the object and avoid the endless looping path. <a href="&dtml.url-myobject;"> <a tal:attributes="href here/myobject/absolute_url"> Cheers, Trevor