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: a5bf9d0f457b11f1d181c442e7789af392c4e1b6 9ea0f4c253876426b585b1ed5a3a381a983013c5)