“Basic characters” is one of the patterns that you can select on the Match panel. Use this pattern to restrict a field to a certain set of ASCII characters. The repetition settings for the field determine how many characters the field can or must match.
Type in a list of characters that you want to allow in this field.
You can only type in characters that don't fit any of the categories that you've turned on below.
Turn on to allow the field to match both the lowercase and uppercase variants of all letters that you typed in as individual characters. When on, the lowercase and uppercase letter groups will also match both variants, even if you turned on only one of them.
Turn off to make the field respect the case of the individual characters you've typed in.
Turn on to make the field match any character except those that you specified.
Turn off to make the field match only those characters that you specified.
Turn on to allow any lowercase letter a..z in this field. Doing so will remove all lowercase letters from the list of individual characters above.
Turn off to allow only those lowercase letters that you typed in as individual characters. Doing so will put back any individual lowercase letters that were removed by turning this option on.
Turn on to allow any uppercase letter A..Z in this field. Doing so will remove all uppercasecase letters from the list of individual characters above.
Turn off to allow only those uppercase letters that you typed in as individual characters. Doing so will put back any individual uppercase letters that were removed by turning this option on.
Turn on to allow any digit 0..9 in this field. Doing so will remove all digits from the list of individual characters above.
Turn off to allow only those digits that you typed in as individual characters. Doing so will put back any individual digits that were removed by turning this option on.
Turn on to allow any ASCII punctuation or symbol character in this field. Doing so will remove all punctuation and symbol characters from the list of individual characters above.
Turn off to allow only those punctuation and symbol characters that you typed in as individual characters. Doing so will put back any punctuation and symbol characters that were removed by turning this option on.
Turn on to allow spaces and tabs in this field. Doing so will remove spaces and tabs from the list of individual characters above.
Turn off to allow only spaces and/or tabs if you typed them in as individual characters. Doing so will put back any individual spaces and tabs that were removed by turning this option on.
Turn on to allow this field to span across multiple lines.
Turn off to force the field to stay within one line.