The type of the function is national.
, or UTF-81. If alphanumeric, it may contain alphanumeric characters or national characters in external format, or both.
Argument-2 must identify a valid EBCDIC, ASCII, UTF-8, or EUC code page. (EBCDIC or ASCII code pages can contain both single-byte and double-byte characters.)
Full support for a CCSID value other than 1208 (UTF-8) requires the installation of the appropriate IBM CCSID conversion table; see Installing CCSID Tables for more information. The table name required for a CCSID of nnn is IBM-nnn. For example, to support a CCSID value of 37, you should install table IBM-37. If the required table is not installed, the conversion is carried out using the default EBCDIC or ASCII code page (according to whether the given CCSID is EBCDIC or not).
If argument-2 is unspecified, each character that has no corresponding internal national representation is converted to a national space..