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).
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 information about 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 user operates, e.g., user’s device in use, physical position, environmental variables (temperature, humidity, sound level, etc.), security settings regarding these information, 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 on demand, maps, etc.
— Recommendation Description (RD): a set of descriptions containing information about recommended items, provided when a customer requests a service in a certain context and in a certain environment. RD may include 1) the recommended content, 2) information extracted from UD, CD, SD, 3) additional logical relations among UD/CD/SD (or their subsets) and 4) metadata from UD/CD/SD.
This document specifies User Description, Context Description, Service Description and Recommendation Description. Description Managers, Recommendation Engine and Application are outside of the scope of this document.
Amendment 1:2019 to CAN/CSA-ISO/IEC 21000-22:18, Information technology — Multimedia framework (MPEG-21) — Part 22: User Description - Amendment 1: Reference software for MPEG-21 user description (Adopted amendment 1:2018 to ISO/IEC 21000-22:2016)