[Zope] url object?

how can I hardwire a link to a folder or a file in Zope? I'm trying to create a navbar method (?) and include it on all pages on different levels of the site. The relative location of the link of course would be changing throughout the site ... but I'd like Zope to do the work here ... Tried it like this <a href:"<dtml-var myfolder>"> myfolder</a> but it did not work ... thnxx 'K:)