Declaration of Styles – World Personal Martial Arts Federation Declaration of December 2015
All Martial Arts styles need to be true to its own origin. A style should be open and absorb positive influence from other styles. At the same time a style cannot absorb other styles completely without becoming the other style. For example Kodokan judo does not have boxing included. Of course a trainer of judo might include some boxing, but if he includes too much the Kodokan judo will become boxing.
Styles evolve. Aspects is added and subtracted all the time, but in the moment fundamental parts is changed the style need to evaluate its existence and origin. Perhaps it has become something else.