tables and merging cells

Hello,

A friend of mine was telling me about a problem he's having with DocBook
tables. He's been unable to successfully merge cells in his documents. I
agreed to help him track down the problem. I scanned through the
docbook.org site but I haven't been able to figure out this problem.

http://docbook.org/tdg/en/html/entry.html
MoreRows would "merge" down, I think?

Under the Process Expectations I see that it must be possible to merge
cells:
	The content of Entry is formatted to fit within the table cell that it
	occupies. Horizontal and vertical spanning may allow the content of an
	Entry to occupy several physical cells.

...but I don't understand how. Is there a tutorial that someone could
point me towards?

thanks!
emma

-- 
Emma Jane Hogbin
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