<!DOCTYPE doc [
<!ELEMENT doc (a?, (b, c?, d?)?, (e | f | g)*, (h+ | i | j+))>
<!ELEMENT a EMPTY>
<!ELEMENT b EMPTY>
<!ELEMENT c EMPTY>
<!ELEMENT d EMPTY>
<!ELEMENT e EMPTY>
<!ELEMENT f EMPTY>
<!ELEMENT g EMPTY>
<!ELEMENT h EMPTY>
<!ELEMENT i EMPTY>
<!ELEMENT j EMPTY>
]>
<doc>
<i/>
</doc>
