EDBT

The papers in this volume were presented at the 13th International Conference on Extending Database Technology (EDBT 2010), held in Lausanne, Switzerland, March 22--26, 2010. Starting last year, EDBT is held jointly with the ICDT (International Conference on Database Theory) conference.

This year, the conference research track received a total of 307 submissions, out of which 54 were accepted. This amounts to an acceptance rate of about 18 %, confirming the reputation of the EDBT conference as being quite selective! The program committee consisted of 75 members, leading to 12--13 articles to be reviewed by each PC member. While such load is not per se inconsistent with previous editions of EDBT or other prestigious conferences such as, e.g., SIGMOD or VLDB, some reviewers found this quite a heavy load, and significant care had to be taken to ensure appropriate external reviewers or load re-balancing. The submissions were thoroughly discussed, typically as soon as three reviews were available for the paper, even if this was before the review submission deadline; overall, 444 comments were exchanged through the electronic submission tool (EasyChair). The chair is particularly grateful to the PC members which have taken the time to carefully consider papers and debate each other's arguments. Given the high number of interesting submissions, the PC has worked with the chair to select the best submissions, and did not consider issues such as the overall balance of various database research areas in the conference program. Thus, the proceedings you are holding now reflect the best and most interesting works submitted to our conference, and you can consider the way they split over various topics as a snapshot of the state of our research community as of September 2009.