[Zope] ZPT newbie:dtml-if last-XXX equivalent?

[vsbabu@vsbabu.org]

Hello,

I'm fairly comfortable with DTML - just trying to
look into the ZPT way. We use SQL methods extensively
and most of our methods are heavily joined for 
performance reasons.

In DTML it  is very easy to find group break points
by using sequence variabled first-XXX or last-XXX.

Are there any equivalents of these in ZPT?

I really don't want to use a asp/php/perl kind
of solution where we code to keep the previous
value in memory and then compare with the current
value :-)

Thanks in advance
vsb