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Program Plagiarism Detection based on X-treeDiff+  

Lee, Suk-Kyoon (Department of Computer Science and Engineering, College of Engineering, Dankook University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea CI / v.47, no.4, 2010 , pp. 44-53 More about this Journal
Abstract
Program plagiarism is a significant factor to reduce the quality of education in computer programming. In this paper, we propose the technique of identifying similar or identical programs in order to prevent students from reckless copying their programming assignments. Existing approaches for identifying similar programs are mainly based on fingerprints or pattern matching for text documents. Different from those existing approaches, we propose an approach based on the program structur. Using paring progrmas, we first transform programs into XML documents by representing syntactic components in the programs with elements in XML document, then run X-tree Diff+, which is the change detection algorithm for XML documents, and produce an edit script as a change. The decision of similar or identical programs is made on the analysis of edit scripts in terms of program plagiarism. Analysis of edit scripts allows users to understand the process of conversion between two programs so that users can make qualitative judgement considering the characteristics of program assignment and the degree of plagiarism.
Keywords
X-tree Diff+; XML;
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Times Cited By KSCI : 1  (Citation Analysis)
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