信息技术.UPnP设备体系结构.第15-10部分:内容同步设备控制协议.内容同步服务

[中文适用范围]： 本服务定义符合 UPnP 设备架构版本 1.0。内容同步服务使两个或多个内容目录服务（CDS）能够相互同步内容。该服务还使 UPnP 控制点能够与内容目录服务同步内容。如果 CDS 希望支持与对象及其资源的同步，则实现必须启用此内容同步服务（CSS）。CSS 将更改日志作为 CDS 对象属性的一部分进行维护，该属性描述自上次同步以来哪些 CDS 对象被添加、修改或删除。由于同步使内容同步服务之间能够交互，因此每个服务都具有控制点（CP）功能，该功能调用其他内容同步服务的操作以实现内容的相互同步。 [外文原描述]： 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.