This Recommendation | ISO/IEC 29177:2016 defines the identifier (ID) resolution protocol for multimedia information access triggered by tag-based identification which is described in Recommendations ITU-T F.771 and ITUT H.621.
The identifier resolution protocol (IRP) in this Recommendation | International Standard consists of two processes: an application-specific object identifier (OID) resolution process which is specified in Rec. ITU-T X.672 | ISO/IEC 291681 and an identifier resolution process.