In addition to the links _delirium provided, http://chrishecker.com/My_Liner_Notes_for_Spore/Spore_Behavior_Tree_Docs http://chrishecker.com/My_Liner_Notes_for

In addition to the links _delirium provided, http://chrishecker.com/My_Liner_Notes_for_Spore/Spore_Behavior_Tree_Docs http://chrishecker.com/My_Liner_Notes_for_Spore/Spore_Behavi... http://aigamedev.com/insider/presentations/behavior-trees/#recording http://aigamedev.com/insider/presentations/behavior-trees/#r... http://books.google.ru/books?id=1OJ8EhvuPXAC&lpg=PA370&ots=iSWLtgTWxz&dq=behavior%20trees%20Artificial%20Intelligence%20for%20Games&pg=PA334#v=onepage&q=behavior%20trees%20Artificial%20Intelligence%20for%20Games&f=false http://books.google.ru/books?id=1OJ8EhvuPXAC&lpg=PA370&#... and for people who prefer XML there is a simular architecture based on FSMs called XABSL, http://www.xabsl.de/ http://www.xabsl.de/ which is used heavily among Robocup teams.