Symbols (and abbreviated terms)PDF/UA Home > 14289-1 Drafting (archive)
The Symbols (and abbreviated terms) clause is an optional element giving a list of the symbols and abbreviated terms necessary for the understanding of the document.
Unless there is a need to list symbols in a specific order to reflect technical criteria, all symbols should be listed in alphabetical order in the following sequence:
- upper case Latin letter followed by lower case Latin letter (A, a, B, b, etc.);
- letters without indices preceding letters with indices, and with letter indices preceding numerical ones (B, b, C, Cm, C2, c, d, dext, dint, d1, etc.);
- Greek letters following Latin letters (Z, z, A, a, B, b, …, L, l, etc.);
- any other special symbols.
For convenience, this element may be combined with the Terms and definitions clause in order to bring together terms and their definitions, symbols, abbreviated terms and perhaps units under an appropriate composite title, for example “Terms, definitions, symbols, units and abbreviated terms”.