ISO/IEC 21000-20:2016 信息技术 多媒体框架（MPEG-21） 第20部分：合同表示语言

标准编号：ISO/IEC 21000-20:2016

中文名称：信息技术 多媒体框架（MPEG-21） 第20部分：合同表示语言

英文名称：Information technology — Multimedia framework (MPEG-21) — Part 20: Contract Expression Language

发布日期：2016-12

标准范围

ISO/IEC 21000-20:2016规定了一种语言，用于在多媒体框架中表示为MPEG-21数字项目或与MPEG-21框架相关的服务的交易而形成的合同。合同表达语言（CEL）旨在以数字方式表示在使用ISO/IEC 21000的环境中达成的协议。这些协议是打包为数字项目的内容交易以及围绕这些内容提供的服务的合同。范围内的合同范围如下:-关于作为MPEG-21数字项目的内容的使用权交易的合同；-关于提供基于MPEG-21的服务的合同，即交付、识别、加密、搜索等。CEL合同所代表的方面包括:-文本条款，在自然语言中，就像在叙事合同中一样，结构合理；-作为计算机语言表达的操作子句。

ISO/IEC 21000-20:2016 specifies a language for representing contracts in the Multimedia Framework formed for the transaction of MPEG-21 Digital Items or services related to the MPEG-21 Framework.Contract Expression Language (CEL) aims at digitally representing the agreements made in environments using ISO/IEC 21000. These agreements are contracts for transactions of content packed as Digital Items, as well as services provided around this content.The range of contracts under scope are as follows:- contracts about transactions on rights for the exploitation of content as MPEG-21 Digital Items;- contracts about the provision of MPEG-21-based services, i.e. delivery, identification, encryption, search and others.The aspects represented by CEL contracts include the following:- the textual clauses, in natural language as they are in the narrative contract, duly structured;- the operative clauses, as computer language expressions.

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