Qiang Yang Jie Yin Charles X. Ling Rong Pan Extracting Actionable Knowledge from Decision Trees. 43-56 2007 19 IEEE Trans. Knowl. Data Eng. 1 http://doi.ieeecomputersociety.org/10.1109/TKDE.2007.10 db/journals/tkde/tkde19.html#YangYLP07