[Zope] sequence-item: how do I use it in an expr?

[Gerrie Roos]

I know I ask a lot of silly questions, at least I'm learning...In the
following snippet 'build' is a list of integers.  Now I want to do
'prBuildInsertMethod' with all the values in 'build'.  To the untrained
eye, it seems like this should work.  But Zope can't find variable
'sequence'...why?  How do I do it then?

<dtml-in builds>
     <dtml-call expr="prBuildInsertMethod(buildNo=sequence-item)">
</dtml-in>