Fig. 4

The Diff Weighted Aggregate Taxonomy between the two WATs of Figs. 2(b) and 3(b). Modified nodes, unmodified nodes, introduced nodes, and removed nodes are shown with a yellow, white, green, and red background, respectively. Child-of relationships connecting diff nodes are colored green, red, or black if they were introduced, removed, or unmodified, respectively. A summary of content changes is shown below the label of each area and partial-area. For the areas containing diff nodes, the global changes of the number of relationships and concepts are shown in bold below the label of such areas. To avoid information redundancy, we do not show such information for areas which have changes all due to introduced nodes or removed nodes, since it is obvious that all different concepts are new or removed from this area, respectively