One of three main types of value that holons possess, along with intrinsic and Ground value. Refers to the partness of a holon in relation to its larger whole(s), or communion value. The more networks and wholes of which a holon is a part, then the greater its extrinsic value. Thus, the more extrinsic value a holon has, the more fundamental it is, since its existence is instrumental to the existence of so many other holons. See intrinsic value and Ground value.