The zip file includes a PDF document, and a 1.5mb .X0A example file.
Learning to use Expanded Articulation (XA) Control for Voice transition
Expanded Articulation (XA) is a specially designed tone generation system of the MOTIF XS that provides greater performance flexibility and acoustic realism. It allows you to more effectively recreate realistic sound and natural performance techniques—such as legato and staccato – and provides other unique modes for random and alternate sound changes as you play. This includes seamless transitions between instrument sounds when applied using the advanced 8 Element Voice architecture found within the Motif XS.