Minimum length. Minimum number of characters that this field can contain to be considered valid. If the field contains fewer characters than the number entered, an error will be generated. You can enter zero (0).

Maximum length. Maximum number of characters that this field can contain to be considered valid. If the field contains more characters than the number entered, an error will be generated. If you enter a negative number (for example, –1), a maximum length error will never be generated for this field, regardless of its value.