本标准规定了服务组合（SC）功能实体（FE）、服务发现和协商（SDN）FE、上下文信息管理（CIM）FE、服务路由（SR）FE和服务策略决策（SPD）FE之间的协议，以支持下一代服务覆盖网络（NGSON）中的服务组合能力。服务组合的功能旨在支持服务链接和实例化、规范解释、服务代理和执行，以及上下文感知和动态自适应的服务组合。

This standard specifies protocols among service composition (SC) functional entity (FE), service discovery and negotiation (SDN) FE, context information management (CIM) FE, service routing (SR) FE, and service policy decision (SPD) FE to support service composition capabilities in a Next Generation Service Overlay Network (NGSON). The capabilities of service composition aim to support service chaining and instantiation, specification interpretation, service brokering and execution, and context-aware and dynamically adaptive service composition.