Proceedings of the 4th International Workshop on Logic in Databases

This volume contains the proceedings of the 4th International Workshop on Logic in Databases (LID 2011), held on 25 March 2011, in Uppsala, Sweden, as a collocated event of the joint ICDT/EDBT 2011 conferences. The workshop program consists of keynote talks by James Cheney (University of Edinburgh, UK) and Phokion Kolaitis (University of California, Santa Cruz & IBM Research Almaden, USA), and the presentation of regular and short papers by workshop participants. LID continues to present high-quality work focusing on logical aspects of data management. In response to the call for papers, eleven papers were received. Each submission was reviewed by at least three program committee members and external reviewers. Six papers were accepted for regular and four for short paper presentation.