[Zope] reading text based config file

Hi there, what's the best way to read a flat file like this line by line and split each line to three variables? 1:menuname:url 1.1:submenuname:url 1.2:submenuname:url 2:nenuname:url 2.1:sub ... background: i'd like to create a global navigation dtml-medthod. Only the configuration file should be replaced depending on the position in the file system. Thank you Marcus