[Zope] Checking multiple variables existence

Is there any way to check if multiple variables exist in the same if statement? Right now I am having to writing multiple nested if statements but can be quite cumbersome... so just looking for an easier way. Currently I'd have to write: <dtml-if var1> <dtml-if var2> <dtml-if var3> <dtml-else> </dtml-if> <dtml-else> </dtml-if> <dtml-else> </dtml-if> When it would be easier to do something like: <dtml-if "var1 and var2 and var3"> <dtml-else> </dtml-if> I've tried multiple different methods to accomplish this but haven't had any luck... so is there an easier way to check multiple variables existence in the same check? Thanks.