This variable applies only in a thin client environment. Use this variable to define the name and path of the map file to be used (if any) to map special characters in your client character set to their decimal or hexadecimal equivalent on the server. This file lets you reconcile the character encoding between two machines that use different codes for the same characters and is particularly useful for international character translation. Note that only single-byte alphanumeric characters are mapped. See International Character Handling for more information.