Michael Curtotti, LL.M., LL.B. and Dr. Eric McCreath, both of Australian National University, and Dr. Srinivas Sridharan of the University of California, San Diego, have posted a paper entitled Software Tools for the Visualization of Definition Networks in Legal Contracts, which I believe they presented at ICAIL 2013 in June 2013.
Here is the abstract:
This paper describes the development of prototype software-based tools for visualizing definitions within legal contracts. The tools demonstrate visualization techniques for enhancing the readability and comprehension of definitions and their associated characteristics. This contributes to more accurate and efficient drafting or reading of contracts through the exploration of the meaning and use of definitions including via word clouds, multilayer navigation, adjacency matrix and graph tree representations.