The Zope 2.1.6 <dtml-in> provides batching information for the previous batch at the start and end of the sequence. Batching information for the following batch, however, is only available at sequence end. This makes it difficult to provide uniform navigation (to previous/next batch) both before and after the sequence. Moreover, if the current batch size is "1" (e.g. size=1), then <dtml-in> provides batch info for the following batch only for the sequence's first element. For all other elements only previous batch information but no following batch information is available. This is a bug. <dtml-in> provides modes "previous" and "next" that do not render the sequence but only provide the respective batching info. The problem with this solution is redundancy: the same parameters must be given to "<dtml-in previous>", "<dtml-in>" and "<dtml-in next>" to obtain reliable information. This is error prone and makes it difficult to separate navigation (for different sequences with different <dtml-in> parameters) in a general navigation method. The patch at URL:http:www.handshake.de/~dieter/pyprojects/zope/dt_in.pat provides uniform batching information both at the start and at the end of the sequence. A batch size of 1 is correctly handled. Dieter