Syntax: Printable String
Used by attributes whose values are printable strings, as defined in CCITT X.208. The printable character set consists of

• Uppercase and lowercase alphabetic characters
• Digits (0...9)
• Space character
• Apostrophe (')
• Left and right parentheses ()
• Plus sign (+)
• Comma (,)
• Hyphen (-)
• Period (.)
• Forward slash (/)
• Colon (:)
• Equal sign (=)
• Question mark (?)

Two Printable Strings are equal when they are the same length and their corresponding characters are the same (case is significant).