[Zope] ZODB and Reportlab

[Jorge Magalhaes]

Hi:

I need to report my all "CDClass" in one pdf document. For do that i want to use the reportlab libs, but i don't know how i can access to my all "CDClass" with a External Method. I have a solution but i think that isn't the best: list all "CDCLass" with a DTMLmethod and pass that list to the my ExternalMethod. My question is: what is the best way for doing that task? 

Thanks Very Much in advance

Have a nice day.

JoRgE