why AP doesn't have reference data sets security context but AR does

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Hello,

I came across this ticket:

Reference Data Set is not an available security context for AP roles (Doc ID 2471733.1)

"Reference Data Set is not an available security context for AP roles. This is because in AP, data is restricted based on the BUs, and the BUs are then restricted based on Reference Dat Sets"

I am wondering why AR does have the reference data sets and what the logic behind this?

Thanks,

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