0FISCPER text variable "External Characteristic Value Key" has changed

Hello!

Could somebody help and tell, why in BI7.0 version (but 3.x RRMX version) the format of the 0FISCPER text variable (also other time characteristics) has changed from 001.2007 (version 3.x) to 0/1 .0700 (version 7.0)?

I cannot understand the logic of the new Exterternal characteristic calue key. What can I do about it?

Thanks for your help, gurus!

BR, Auli Peltola