What is: MAML
http://techwritetips.wordpress.com/2006/04/03/what-is-maml/

Tech Write Tips
2006

Abstract:

MAML is part of a new approach to help in Windows Vista. This approach is both more integrated with the software and more focused on user tasks. MAML provides a structre in which you can write user assistance information, which can then be presented to the user in a variety of locations.