ISO/IEC 13568:2002

The following are within the scope of this International Standard: _ the syntax of the Z notation; _ the type system of the Z notation; _ the semantics of the Z notation; _ a toolkit of widely used mathematical operators; _ LATEX [10] and e-mail mark-ups of the Z notation. The following are outside the scope of this International Standard: _ any method of using Z, though an informative annex (E) describes one widely-used convention.