概念藝術
Conceptual art focused attention on the idea behind the art object and questioned the traditional role of that object as the conveyor of meaning. Subsequently, those theories cast doubt upon the necessity of materiality itself as conceptual artists "de-materialized" the art object and began to produce time-based and ephemeral artworks. Although total dematerialization of the art object never occurred, the art object became flexible – malleable – and that malleability, coupled with semiotics and computer processing, has resulted in the post-conceptual art object.