A personal an cultural value is a relative ethic value, an assumption upon which implementation can be extrapolated. A value system is a set of consistent values and measures. A principle value is a foundation upon which other values and measures of integrity are based. Values are considered subjective and vary across people and cultures. Types of values include ethical/moral values, doctrinal/ideological (political, religious) values, social values, and aesthetic values. It is debated whether some values are intrinsic.