Lee, et. al., present a very good overview about graph visualizations and the techniques and terms that are commonly associated with them. After reading this paper, I was able to better understand the research presented in "Balancing Systematic and Flexible Exploration of Social Networks." Although Lee, et. al., give a good description of each task that can be present in a graph visualization, I wished they would have provided some images to better understand each one.
Several of the low-level tasks that Lee, et. al., describe can be seen in the implementation of SocialAction. The most prominent ones are grouping, clustering, and anomaly detection. Overall, I found that this paper gives a simplified version of these tasks such that any reader can understand its implementation and harness its abilities to integrate into a more complex system. SocialAction is a good example of taking several general low-level tasks and coupling their functionality. By combining low-level tasks, researchers and developers are able to create more complex tasks that allow for a more interactive and unique visualization.
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