BS ISO/IEC 19778-3:2015 pdf download-Information technology — Learning, education and training — Collaborative technology — Collaborative workplace Part 3: Collaborative group data model.
5.4.5 DE CG_ID_source The value of this Data Element specifies the URI of the source where the regulations are provided that are associated with the used collaborative group ID value. The purpose of this value is manifold. — The URI (in its capacity of being a globally unique identifier) unambiguously identifies a particular community that is responsible for the uniqueness of the used collaborative group ID values within this community. — The URI provides access to the regulations regarding the format of the admissible collaborative group ID values. These regulations generally specify how such identifiers are constructed (within the limits of their datatype). Typically, such a specification may restrict the permitted character set, may specify particular characters with special meanings (e.g. separators between distinct fields of the character string), may (for Data Model instantiations only) restrict the supported number of characters of the character string, etc. NOTE 1 The format of such regulations is not specified in this part of ISO/IEC 19778. Particularly, it is left open whether such regulations are appropriate for automated use or just for human reading, understanding, and observance. NOTE 2 This Data Element is optional in order to allow simple applications of this Data Model, where the practicing community takes care that the collaborative group identifier values are unambiguous. NOTE 3 At the time of the publication of this part of ISO/IEC 19778, direct or indirect reference to RFC 3986 – Uniform Resource Identifiers (URI): Generic Syntax {http://www.ietf.org/rfc/rfc3986.txt} was recommended. 5.4.6 DE CG_ID_value This Data Element represents both — the identifier of this collaborative group Data Model instantiation an d — the identifier-based reference to the collaborative workplace which is associated with this collaborative group Data Model instantiation. This identifier shall be unique at least within the application range of this Data Model instantiation.