> The expression that controls the permissible format of IPv6 addresses in
> yang-types is of this ilk.
> " type string {
> pattern '((:|[0-9a-fA-F]{0,4}):)([0-9a-fA-F]{0,4}:){0,5}'
> + '((([0-9a-fA-F]{0,4}:)?(:|[0-9a-fA-F]{0,4}))|'
> + '(((25[0-5]|2[0-4][0-9]|[01]?[0-9]?[0-9])\.){3}'
> + '(25[0-5]|2[0-4][0-9]|[01]?[0-9]?[0-9])))'
> + '(/(([0-9])|([0-9]{2})|(1[0-1][0-9])|(12[0-8])))';
> pattern '(([^:]+:){6}(([^:]+:[^:]+)|(.*\..*)))|'
> + '((([^:]+:)*[^:]+)?::(([^:]+:)*[^:]+)?)'
> + '(/.+)'; "
when the bsi botched modula-2 standardisation and destroyed the language [0],
professor wirth pinned to his wall the a4 page it took them to describe the
null statement.
this piece of dystopian beauty is worthy of a wall.
randy
--
[0] http://www.scifac.ru.ac.za/cspt/sc22wg13.htm