a XML file containing log messages along with their unique identity, severity and text

(n.) A file of message strings, separated from an application, with an indexed internal structure. The message catalog contains program messages, command prompts, and responses to prompts for a specific application.

A file created using the AIX Message Facility from a message source file that contains application error and other messages, which can later be translated into other languages without having to recompile the application source code.