Ross, I'm not derogating the use of sequential IDs but IIRC, the bloke had 
a reason not to use a sequential id counter and wanted an alternative. 
The uuid spec states that uuid should cater for time adjustments on the 
local clock, hence, shouldn't be "vulnerable" (Of course, in the real 
world, that depends on how the spec has been implimented). The uuid can be 
sequentialised and can gauranteed to be unique to a high degree of 
certainty in time and space. There are no locking or contention issues 
when a uuid is generated opposed to a heavily used key generator.
I stand by my assertion that a uuid is a viable and justifiable solution 
in the original posters problem space. ;-)
Cheers, Stuart

[EMAIL PROTECTED] wrote: -----


>This would still make things "vulnerable" whenever date/time changed
>on
>the generating machine .... the "beauty" of the sequential ID is that
>fact that nit WILL be in "real time" order, regardless of what people
>do
>with dae & time of the machine



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