LECTURE PLAN CHANGE: We have had to change schedule. Toto Horvli (Teradata expert from NCR) shall be lecturing tomorrow (Wednesday 6th October 2004) on datawarehousing. Akk?k's lectures heterogeneous database systems (HDBS) and transaction management in HDBS is to be moved after to the next lecture, which will be after next week (week 43), since next week is free. The lecture on change management nd XML will then be moved to the week after (week 44), which was planned as the week for datawarehousing originally.