’ s Introduction : Special Issue of the ECML PKDD 2013 Journal Track

The 2013 European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECMLPKDD) was held in Prague, September 2013. Following the long-standing tradition of the series, it brought together researchers in Machine Learning and Data Mining for an exciting program of cutting-edge research results, aiming in particular at a cross-fertilization between these two areas. The 2013 edition featured a recordbreaking 138 full presentations of novel research results, selected through a careful peer review process from 629 submissions. For the first time, the conference used a mixed submission model. Work could be submitted as a journal article to one of two journals participating in this model (Data Mining and Knowledge Discovery and Machine Learning), or it could be submitted for publication in the conference proceedings. A total of 96 original manuscripts were submitted to Data Mining and Knowledge Discovery. Six of these were accepted for inclusion in this issue, and for pre-