The CISSP curriculum breaks the subject matter down into a variety of Information Security topics referred to as domains.[11] The CISSP examination is based on what (ISC)² terms the Common Body of Knowledge (or CBK). According to (ISC)², "the CISSP CBK is a taxonomy – a collection of topics relevant to information security professionals around the world. The CISSP CBK establishes a common framework of information security terms and principles that allow information security professionals worldwide to discuss, debate and resolve matters pertaining to the profession with a common understanding."[12]