Bulletin of the Technical Committee on Data Engineering December 2007 Vol. 32 No. 4 IEEE Computer Society Letters Letter from the Editor-in-Chief ...................................................... David Lomet 1 Letter from the Special Issue Editors .................................... Peter Buneman and Dan Suciu 2 Special Issue on Data Provenance Provenance in Databases: Past, Current, and Future .................................... Wang-Chiew Tan 3 Provenance and Data Synchronization ...................... J. Nathan Foster and Grigoris Karvounarakis 13 Program Slicing and Data Provenance ................................................ James Cheney 22 Recording Provenance for SQL Queries and Updates ................ Stijn Vansummeren and James Cheney 29 Issues in Building Practical Provenance Systems ........................ Adriane Chapman, H.V. Jagadish 38 Provenance in Scientific Workflow Systems ...................... Susan Davidson, Sarah Cohen-Boulakia, Anat Eyal, Bertram Ludascher, Timothy McPhillips, Shawn Bowers, Manish Kumar Anand, Juliana Freire 44 Copyright and Provenance: Some Practical Problems ............................ John Mark Ockerbloom 51 Conference and Journal Notices ICDE Conference ...................................................................... back cover