implementation and the
DTD implementation is that the RELAX NG implementation does not
require you to create a model module specific to the combination of
XHTML modules you are using. Instead, simply include the modules you
want. The modules take care of redefining the content models
appropriately.</p>

<p>Note also the following differences:</p>

<ul>

<li>The frames module is used instead of the struct module, rather
than in addition to it.</li>

<li>In the frames module, the <code>frameset<