In dzogchen teachings, "dharmakaya" means the buddha-nature's absence of self-nature, that is, its emptiness of a conceptualizable essence, its cognizance or clarity is the sambhogakaya, and the fact that its capacity is 'suffused with self-existing awareness' is the nirmanakaya.
Under segregation, owners of establishment could decide the manner in which they wanted to treat African-Americans. This often took the form of separate spaces for African Americans or forbidding African Americans from commonly used spaces at all.
