Different revision schemes for different status

[Felix Dorner]

I'm starting with ivy, trying to set up a company repository.
I'd like to use different revision schemes based on the status of a 
module. For example:

Status 'release' => just version number, e.g 1.0
Status 'milestone' => version number + 'M' + milestone number, e.g. 1.0-M1
Status 'integration' => version number + 'I' + build date, e.g. 
1.0-I200910262000

Does such a scheme look reasonable, or even dangerous?

Thanks for any comment,
Felix