<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>