It's a fairly standard problem. Arranging data in multiple pages is
essentially the same as arranging in multiple columns, see

http://www.dpawson.co.uk/xsl/sect2/N7450.html#d10871e13

except that instead of putting the data inside a <tr> element, you want to
precede it with a page header.

Doesn't he just want the the table header to repeat across pages when
the table is spread across pages?

I think this is possible FO if that's your target (one of the FO
experts will have to say exactly how) but for HTML it's not possible.

cheers
andrew