http://www.rfc-editor.org/rfc/rfc8107.txt
RFC 8107: Advertising Digital Identifier (Ad-ID) URN Namespace Definition, J. Wold2017-03-01T23:00:00-00:00Advertising Digital Identifiers (Ad-IDs) are used to identify advertising assets across all media platforms. This document defines the formal Uniform Resource Name (URN) Namespace Identifier (NID) "adid" for Ad-IDs.