Folks, I have checked with Ian Foster and Tom Maguire, co-authors on the OGSA BP, and we all three agree to the following: 1) We should create a profile specific topic for change notification to circumvent the problem with WS-Notification/WS-Topics. 2) We should change the representation of the plural QName lists from a [1..1] property contain a list to a [1..n] property with one QName each. Thanks: Dr. David Snelling < David . Snelling . UK . Fujitsu . com > Fujitsu Laboratories of Europe Limited Hayes Park Central Hayes End Road Hayes, Middlesex UB4 8FE Reg. No. 4153469 +44-208-606-4649 (Office) +44-7768-807526 (Mobile)