nuno writes:

i want to do a <dtml-with "PARENTS[0].location.place">

the problem is that instead of writing PARENTS[0].location.place i want to use a variable that is a built string:

<dtml-call "REQUEST.set('location', 'PARENTS[0].location.' + dir)"> You already got an answer for your specific problem....

A general answer to problems like yours is "restrictedTraverse".... Dieter