The basic concepts of structuralism are outlined, thus the chapter deals with structuralist knowledge representation at later stage. The structuralist representation scheme seems to qualify as a frame system in the very sense that this notion has been introduced by Minsky. Certain meta-theoretical concepts introduced in the structuralist framework simply behave like frames in the very sense this notion is understood in Minsky and subsequent work inspired by this paper. For example, in classical mechanics, the system of planets forming our solar system is considered, among other things, to be an intended application of Newton's second and third axiom. The distinction between phenomenal, or non-theoretical, properties and theoretical ones as well as the kind of slots associated with the frame-like concepts in structuralism also explained. People assumes that a particular scientific theory T, being composed of several theory-elements, has been given a logical reconstruction in the framework of structuralism.