CSA Group Information technology — Multimedia framework (MPEG-21) — Part 20: Contract Expression Language (Adopted ISO/IEC 21000-20:2016, second edition, 2016-12-15)

Standards development within the Information Technology sector is harmonized with international standards development. Through the CSA Technical Committee on Information Technology (TCIT), Canadians serve as the SCC Mirror Committee (SMC) on ISO/IEC Joint Technical Committee 1 on Information Technology (ISO/IEC JTC1) for the Standards Council of Canada (SCC), the ISO member body for Canada and sponsor of the Canadian National Committee of the IEC. Also, as a member of the International Telecommunication Union (ITU), Canada participates in the International Telegraph and Telephone Consultative Committee (ITU-T).  Scope This document 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.