[Koha] Staff permission flag

[vinod mishra]

Hello
I just need a confirmation that whenever we assigned staff permission to
someone in koha it generate some number depending on options permitted, for
example full access flag id 1, only catalogue, 4, etc and for others number
in 3/4 digits.
My question is above numbers are fixed according to the options permitted
and will it continue in next versions. Actually I am trying to develop some
tool and authenticate on the basis of flag ID.