It's a dog thing...
essentially Royal Dutch Police Dog
Koninklijke Nederlandse Politiehond Vereniging -
http://www.knpv.nl/
It is a competition for protection dogs. Primarily geared towards the Dutch Shepherd but isn't limited to the Hollandse Herder. Somewhat like Schutzhund, French Ring, Mondio Ring, etc... if you have ever heard of any of those.
eric