The following elements in addition to the elements in the version of DocBook to which this module is added:
| Element | Brief Description |
|---|---|
| constraint | A constraint in an EBNF production |
| constraintdef | The definition of a constraint in an EBNF production |
| lhs | The left-hand side of an EBNF production |
| nonterminal | A non-terminal in an EBNF production |
| production | A production in a set of EBNF productions |
| productionrecap | A cross-reference to an EBNF production |
| productionset | A set of EBNF productions |
| rhs | The right-hand side of an EBNF production |