The format of the mapping file is multiple lines, with each line terminated by a linefeed character. This may be problematic for editors that expect carriage-return or carriage-return followed by linefeed to terminate a line.
Each translation table starts with a #BEGINMAP line and ends with an #ENDMAP line. Other than those two commands, the # indicates the start of a comment that continues to the end of line. Blank lines are ignored.
The #BEGINMAP and #ENDMAP statements also include the name of the map being defined.
For an example, see Example Mapping File.