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- The software and text similarity tester SIM
- SIM tests lexical similarity in texts in C, Java, Pascal, Modula-2, Lisp,
- Miranda, and natural language. It is used
- - to detect potentially duplicated code fragments in large software projects,
- in program text but also in shell scripts and documentation;
- - to detect plagiarism in software projects, educational and otherwise.
- SIM is available through ftp. The directory
- ftp.cs.vu.nl:pub/dick/similarity_tester
- contains the sources (in C) and the MSDOS .EXEs.
- The software similarity tester is very efficient and allows us to compare
- this year's students' work with that collected from many past years (much to
- the dismay of some, mostly non-CS, students). Students are told in advance
- that their work is going to be compared, but some are non-believers ...
- The output of the similarity tester can be processed by a number of shell
- scripts by Matty Huntjens. These shell scripts take sim output and produce
- lists of suspect submissions, histograms and the like.
- The present version of these scripts is very much geared to the local situation
- at the Vrije Universiteit, though; they are low on portability.
- Matty Huntjens' email address is [email protected].
- We are not afraid that students would try to tune their work to the
- similarity tester. We reckon if they can do that they can also do the
- exercise.
- Since this piece of handicraft does not qualify as research, there are no
- international papers on it. A paper, titled `Detecting copied submissions in
- computer science lab work', was published in a local (i.e. Dutch) computer
- science journal:
- %A Dick Grune
- %A Matty Huntjens
- %T Het detecteren van kopie\(:en bij informatica-practica
- %J Informatie (in Dutch)
- %V 31
- %N 11
- %D Nov 1989
- %P 864-867
- The ftp directory contains a terse technical report about the internal
- working of the program.
- Dick Grune
- Vrije Universiteit
- de Boelelaan 1081
- 1081 HV Amsterdam
- the Netherlands
- [email protected]
- +31 20 444 7744
- ----------------------------------------------------------------
- With infinitely many exceptions, what you do makes no difference.
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