Decimal,Name,Description,Reference
0,Reserved,,[IANA]
1,per-poo,create proof-of-origin,[Carlisle_Adams]
2,rec-poo,verify proof-of-origin,[Carlisle_Adams]
3,per-pod,create proof-of-delivery,[Carlisle_Adams]
4,rec-pod,verify proof-of-delivery,[Carlisle_Adams]