<?xml version="1.0" encoding="UTF-8"?>
<foo>
<!-- def='NT-Char'--><!-->Char</nt>* ']]&gt;' <nt def='NT-Char'>Char</nt>*))
']]&gt;'</rhs>
<com>CDATA sections</com>
<rhs>| '&lt;!DOCTYPE' 
(<nt def="NT-Char">Char</nt> - ('[' | ']'))+
('[' 
<nt def="NT-simpleDTD">simpleDTD</nt>*
']')? '&gt;'</rhs>
<com>doc type declaration</com>
<prod id="NT-simpleDTD"><lhs>simpleDTD</lhs>
<rhs>'&lt;!&como;' 
(<nt def='NT-Char'>Char</nt>* - 
(<nt def='NT-Char'>Char</nt>* '&comc;' <nt def='NT-Char'>Char</nt>*))
'&comc;&gt;'</rhs>-->
</foo>