Christian Kop Heinrich C. Mayr Günther Fliedl Elisabeth Métais Special issue on Natural Language Processing and Information Systems (NLDB 2006). 1-2 2008 66 Data Knowl. Eng. 1 http://dx.doi.org/10.1016/j.datak.2008.03.001 db/journals/dke/dke66.html#KopMFM08