3 title Download Policies to PDP
14 PDP --> PAP: Send Status (initial status) to PAP
15 else Update Request from User
16 User --> PAP : Update Policies on PDP
19 PAP --> PolicyDB: Read PDP metadata and Policy Set
20 PAP -> PAP: Prepare for PDP update
24 PAP --> PDP: Set PDP mode as PASSIVE
26 PAP --> PDP: Transfer Policy Set Policies to PDP
29 PDP --> PDP: Load Policies
32 alt PDP Mode should be ACTIVE
33 PAP --> PDP : Set PDP mode as ACTIVE
34 ref over PDP: Execute Policies in\nACTIVE Mode
35 else PDP Mode should be SAFE
36 PAP --> PDP : Set PDP mode as SAFE
37 ref over PDP: Execute Policies in\nSAFE Mode
38 else PDP Mode should be TEST
39 PAP --> PDP : Set PDP mode as TEST
40 ref over PDP: Execute Policies in\nTEST Mode
43 PAP --> PolicyDB: Update PDP metadata