@article {682, title = {Towards mega-modeling: a walk through data analysis experiences}, journal = {{SIGMOD} Record}, volume = {42}, number = {3}, year = {2013}, pages = {19{\textendash}27}, doi = {10.1145/2536669.2536673}, url = {http://doi.acm.org/10.1145/2536669.2536673}, author = {Stefano Ceri and Themis Palpanas and Emanuele Della Valle and Dino Pedreschi and Johann-Christoph Freytag and Roberto Trasarti} }