More so lately, Martial Arts can be divided into those that have a tournament & sports focus, and those that are trained with the purpose of self defense. In martial boxing you can see this with Muay Thai and Kickboxing, where Kickboxing usually has a heap more ring-rules. There’s a post at www.muaythaicamps.com that covers this pretty well.  If you look around on YouTube you can find videos that illustrate this difference as well ( also more info on the page on this site about martial boxing ).