The following validation rules apply to the “Limited character set” input field:

1. The first character must be a letter:

  • a..z
  • A..Z

2. All subsequent characters must come from the following subset:

  • a..z
  • A..Z
  • 0..9
  • (space)
  • .
  • _ (underscore)
  • @
  • *
  • (
  • )
  • +
  • =
  • !
  • #
  • $
  • %
  • ^
  • ,
  • /
  • [
  • ]
  • {
  • }
  • ;
  • :