Figure 4.

Part of the concept hierarchy of the combined transition context K _com (cf. Figure 3 ) for simulations and data. Circles represent formal concepts, i.e. sets of transitions (pairs of input and output states) together with all their common attributes. The attributes of the input and output state can be read from the hierarchy by following the lines upwards. The concept order is defined by the subconcept – superconcept relationship: A superconcept is more general being determined by fewer attributes than a subconcept. At the same time, the superconcept’s object set (set of transitions) is enlarged. The number of objects that have exactly the respective attribute combination is indicated in the squared box below a concept. Hence, many general concepts in the upper part of the hierarchy have no own objects. As any formal concept, they embrace different more specific concepts below, characterized by supplementary attributes. A concept hierarchy is a complete and structured representation of a data set. The implications of the respective data set can be read from the hierarchy, and supplementary dynamical features can be identified. For examples and the meaning of the two highlighted concepts see Results and discussion.