"G. Ken Holman" wrote:

> >   What is the best approach for this problem?

> I would implement the sub-tables as individual tables.

  Thanks for your answer.  I will experiment with this approach.

> Since gaps are table-wide properties, I think embedding tables
> is best

  Which property can I use to set the gap width?

  Regards,

-- 
Florent Georges
http://www.fgeorges.org/