标准编号：ISO/IEC 21000-20:2013
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：2013-07
标准范围
This part of ISO/IEC 21000 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.The Contract Expression Language (CEL) aims at digitally representing the agreements made in an environment of ISO/IEC 21000 use. These contracts include those about both transactions of content packed as Digital Items as well as services provided around this content.The range of contracts under scope are:?-contracts about transactions of content as MPEG-21 Digital Items;-contracts about the provision of MPEG-21-based services, i.e. delivery, identification, encryption and search.The aspects represented by CEL contracts include:?-the textual clauses, in natural language as they are in the narrative contract, duly structured;?-the operative clauses, as computer language expressions.
立即下载标准文件