VLDB COPYRIGHT TRANSFER FORM Proceedings of the 25th International Conference on Very Large Databases Edinburgh, 7th - 10th September, 1999. Copyright of the article entitled: Authored by: If the article has been written in the course of employment by a Government agency so that no copyright exists, please check here [ ]. If not, if and when the article is accepted for publication, the undersigned hereby grants and assigns exclusively to the VLDB Endowment all rights of copyright in this contribution, and the exclusive right to print, publish, and sell the work throughout the world in all languages, with the following exception: The author(s) reserve(s) the following: (1) All other rights such as patent rights. (2) The right to use all or part of this article in future works of their own, such as lectures, press releases, reviews or textbooks. In the case of republication of the whole article or parts thereof in journals or reprint publications by a third party, written permission must be obtained from the VLDB Endowment to be signed by at least one of the authors (who agrees to inform the others, if any) or, in case of a "work made for hire," by the employer. In the case of an article commissioned by another person or organization or written as part of duties as an employee, an authorized representative of the commissioning organization or employer should sign. To be signed by all authors, or, if signed by only one author on behalf of the others, the following additional statement must be signed and accepted by the author signing for his co-authors: "I represent and warrant that I am authorized to execute this transfer of copyright on behalf of all the authors of the article referred to above." Signature Signature Signature Signature Signature Signature print name print name print name print name print name Title (if not author) date date date date date