absolute, unvarying table-cell heights

Hi!

I have a lot of experience with TeX and rather less with XSL-FO. So I may
simply be treating the latter too much like the former ...

Is there anyway to ensure that the heights of table cells remain constant,
even if the contents of the cell is taller than the cell itself? Something
analogous to the TeX \vbox to<dimen>{\vss<arbitrarily tall stuff>\vss}
construct, if that helps anyone ...

Thanks!
Fred