| 服务规范 | 服务访问令牌(SAT) |
| Request [List[Services]] | Services [List[Service]] |
| Services [List[Service]] | Service [Address, List[Capabilities]] |
| Service [Type, List[Resources] | Obligation [NotBefore, NotAfter] |
| List [SLA], PriceRange, ServiceLocation, NumberOfUsers, ServicePeriod] | SAT [UserId, IssueInstance, Issuer, Subject, PublicKey, Signature, SignHash, List[Services]] |
| Resources [] | Access Locations [] |
| SLA [QoS, Throughput, PowerBackup, Security, List[Provisioning], Service Community] | Capabilities [Actions, Obligation, List[AccessLocations]] |