Baudrillard's published work emerged as part of a generation of French thinkers including: Gilles Deleuze, Jean-François Lyotard, Michel Foucault, Jacques Derrida, and Jacques Lacan who all shared an interest in semiotics, and he is often seen as a part of the post-structuralist philosophical school. In common with many post-structuralists, his arguments consistently draw upon the notion that signification and meaning are both only understandable in terms of how particular words or "signs" interrelate. Baudrillard thought, as do many post-structuralists, that meaning is brought about through "systems" of signs working together. Following on from the structuralist linguist Ferdinand de Saussure, Baudrillard argued that meaning ("value") is created through "difference"—through what something is not (so "dog" means "dog" because it is not-"cat", not-"goat", not-"tree", etc.). In fact, he viewed meaning as near enough self-referential: objects, images of objects, words and signs are situated in a web of meaning; one object's meaning is only understandable through its relation to the meaning of other objects; for instance, one thing's prestige relates to another's mundanity.