$form_def = [

{
  NAME    => 'form entry name',
  TYPE    => 'entry type = string|bool|combo|button',
  VALUE   => 'visible value',
  DATA    => 'actual data, sometimes equal to value',
  RE      => 'regexp to check input',
  RE_HELP => 'help hint text when RE fails',
  IN_CB   => 'input data filter callback',
},

];