Figure 2

Schematic overview of the layout approach.(a) Formal context describing the association of vertices v _i to different annotations A _m . (b) Result of the formal concept analysis. The final subset graph is derived based on the formal concept, excluding empty subset nodes that occur as we assign vertices only to one subset group (see colored v _i ’s). Additional edges (dashed links) are added to connect subsets that are more than one hierarchy level apart. (c) Our subset graph is laid out using a force-directed layout approach considering edge weights (mapped to shades of gray). (d) Each subset node is replaced by the group of vertices it represents, which is laid out independently from the other groups using a force-directed approach.