Hello Schmidt ,
BRF - Business Rules Framework is used for defining Business rules which we use in our day to day life.
For Example : You can define a rule for giving Discount on certain Product. You can define a rule for this with the start and end date where in you want to give the discount.
Or your scenario might be some thing like : The discount of 50% on certain product should be there for 30 days and after that it should get reduced to 30%. All these stuffs you can control through BRF.
A unique GUID will be generated for Each application and with the help of this you can able to call this Application any where in you A BAP Programming.
Hope this helps.
Thanks and Regards,
Nikhil Kulkarni