标准编号：ISO/IEC 21000-22:2016
中文名称：信息技术 多媒体框架（MPEG-21） 第22部分：用户描述
英文名称：Information technology — Multimedia framework (MPEG-21) — Part 22: User Description
发布日期：2016-11
标准范围
This document standardizes the four data formats: User Description (UD), Context Description (CD),Service Description (SD), and Recommendation Description (RD).— User Description (UD): a set of descriptions which may contain static and dynamic informationabout the user, including some other data like the history of the user’s interactions, preferences,security settings regarding these information, etc.— Context Description (CD): a set of descriptions of the environmental situation in which the useroperates, e.g., user’s device in use, physical position, environmental variables (temperature,humidity, sound level, etc.), security settings regarding these inform ation, etc.— Service Description (SD): a set of descriptions containing information (including security settings)about the service (or a set of sub-services), that is offered to the end-user application, e.g. video ondemand, maps, etc.— Recommendation Description (RD): a set of descriptions containing information aboutrecommended items, provided when a customer requests a service in a certain context and in acertain environment. RD may include 1) the recommended content, 2) information extracted fromUD, CD, SD, 3) additional logical relations among UD/CD/SD (or their subsets) and 4) metadatafrom UD/CD/SD.This document specifies User Description, Context Description, Service Description andRecommendation Description. Description Managers, Recommendation Engine and Application areoutside of the scope of this document.
立即下载标准文件