constraintdef — The definition of a constraint in an EBNF production.


constraintdef ::= [-]

Additional Constraints

  • If this element is the root element, it must have a version attribute.


A constraintdef contains a description of a constraint that cannot be expressed in the grammar (generally logical rather than syntactic constraints).

Processing expectations

Formatted as a displayed block.

Last revised by Norman Walsh on (git hash: 32232d73aaed8bf7134470f3f72f9e1dc6874d38 68abf83671c42c0ef5e0aed2f171edf1c3b1bdcd)