ISO/IEC 29341-15-10:2011（E）描述了内容同步服务，该服务允许两个或多个ContentDirectory服务[CD]彼此同步内容。该服务还允许UPnP控制点将内容与ContentDirectory服务同步。我们将此服务称为“CSS”或“ContentSync服务”。如果CDS希望支持对象及其资源与其他CDS的同步，则实现必须启用此ContentSync服务（CSS）。CSS将更改日志作为CDS对象属性的一部分保存，该属性描述自上次同步以来添加、修改或删除的CDS对象。由于同步支持ContentSync服务之间的交互，因此每个服务都有一个控制点（CP）功能，可以调用其他ContentSync服务的操作，以实现彼此之间的内容同步。 此服务定义符合UPnP设备体系结构1.0版。

ISO/IEC 29341-15-10:2011(E) Describes the Content Synchronization service which enables two or more ContentDirectory services [CDS] to synchronize content with each other. This service also enables a UPnP control point to synchronize content with a ContentDirectory service. We refer this service as "CSS" or "ContentSync service" from hereon. If a CDS wants to support synchronization of objects and its resources with other CDSs, the implementation MUST enable this ContentSync service (CSS). CSS keeps change log as part of CDS object property that describe which CDS objects are added or modified or deleted since it has synchronized last. Since synchronization enables interaction between ContentSync services, each service has a Control Point (CP) functionality that invokes actions to other ContentSync service to achieve synchronization of contents with each other. This service definition is compliant with the UPnP Device Architecture version 1.0.