National hexadecimal literals have the following format:
Format >>-NX"--hexadecimal-character-sequence--"----------------------><
The hexadecimal character sequence consists of groups of four hexadecimal digits that map to a Universal Character Set Version 2 (UCS-2) or Unicode character.
The maximum length of national hexadecimal literals is 512 national characters.
ALL followed by a national hexadecimal literal is a national hexadecimal literal.