This software is for Pattern Information Extraction from Crystal Structures. The source is available under GPL license. Thus you can use and modify it freely for academic purposes. Please cite the following article if you use it.
Erhan Okuyan, Uğur Güdükbay, Oğuz Gülseren, "Pattern Information Extraction from Crystal Structures", Computer Physics Communications, Vol. 176, No. 7, pp. 486-506, 2007. (pdf copy).