Nakanishi was opposed to treating corporate identity as just a logo and a logotype; instead, he created a framework splitting it into three layers. MI, or Mind Identity, is the philosophy, values, and vision behind a company. BI, or Behavior Identity, is how the company and its people act in the world — the kind of service they provide. And VI, or Visual Identity, is the visual expression of how the mind and behavior identities are manifested.
A nice framework for all types of communications.