<!ELEMENT ISR_GRAMMAR (Start,DeclarationNonTerminal*)>

<!ELEMENT Start (Or?)*>
<!ATTLIST Start name CDATA #REQUIRED>

<!ELEMENT Terminal EMPTY>
<!ATTLIST Terminal name CDATA #REQUIRED>

<!ELEMENT NonTerminal EMPTY>
<!ATTLIST NonTerminal name CDATA #REQUIRED>

<!ELEMENT Or (NonTerminal|Terminal)*>

<!ELEMENT DeclarationNonTerminal (Or?)*>
<!ATTLIST DeclarationNonTerminal name CDATA #REQUIRED>