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First, I would like to thank the members of SIGMOD executive committee in giving me their full support and assisting with the logistics of DiSC. In particular, I am grateful to Marianne Winslett for securing permissions for the SIGMOD 2005 tutorials and workshops.

The editorial board of DiSC'06 have done a tremendous job in bringing content together and I am thankful to every one of them.

DiSC'06 marks my third and final year as the Editor of DiSC. I would like to thank every editor of DiSC'04, '05 and '06 for their contributions. DiSC is a testament of a strong and healthy community of researchers and practioners in the areas of databases and information management.

I am thankful to Professor Aidong Zhang, the previous editor of DiSC, for showing me the ropes and helping me to get started. I also want to acknowledge and thank Professor Isabel F. Cruz, the founding editor of DiSC, for introducing the concept of DiSC as a service to the community.

I would also like to thank the VLDB endowment, IEEE, and Springer for their permission to include the contents of the conference and workshop proceedings featured in DiSC'06. I was impressed by this collaboration and the overall professional attitude of different contact at these publishers.

At the ACM, I would like to thank Deborah Cotton, and Ginger Ignatoff for their logistic help with copyright issues and careful look at the final version of DiSC'06.

Shahram Ghandeharizadeh, DiSC'06 Editor
Los Angeles, California
May 22, 2006

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