Wrap some elements in a titlepage spec file?

Is is possible to wrap two or more elements inside a
<t:titlepage-content> to generate an FO that encloses the formatted
elements?  It seems that <t:titlepage-content> can only contain a
sequence of empty elements.

I want an article's title and subtitle to be formatted inside an
<fo:block> that provides their common background.  That doesn't seem
possible with the templating mechanism (except by the template that's
called for the title also finding and processing the subtitle).  Is it
possible?

Regards,


Tony Graham.
-- 
Senior Architect
XML Division
Antenna House, Inc.
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Skerries, Ireland
[email protected]