BS ISO 20213:2015是规定航天器机载接口的一系列文件之一 服务（SOI）-为支持车载应用而提供的符合要求的服务。本文档的目的是定义 SOIS消息传输服务。其范围是仅指定服务，而不是指定 提供服务的方法，尽管假定使用SOIS子网服务。本文件符合SOIS绿皮书中规定的原则（参考文献[C2]） 不应在未咨询本参考文件的情况下使用。购买本文件时可获得的所有当前修订均包含在购买本文件中。

BS ISO 20213:2015 is one of a family of documents specifying the Spacecraft Onboard Interface Services (SOIS)-compliant services to be provided in support of onboard applications.The purpose of this document is to define services and service interfaces provided by the SOIS Message Transfer Service. Its scope is to specify the service only and not to specify methods of providing the service, although use of the SOIS subnetwork services is assumed.This document conforms to the principles set out in the SOIS Green Book (reference [C2]) and should not be applied without first consulting this reference.All current amendments available at time of purchase are included with the purchase of this document.