For ITU-R Recommendations (International Telecommunication Union - Radiocommunication Sector)
Information:
The identifier r-recommendation was added by ITU-T Study Group 17 in March 2004 to be used together with the top-level identifier itu-r(0) for the purpose of OIDs such as {itu-r(0) r-recommendation(5) ....}. Consequently, the Unicode label R-Recommendation can only be used with the father Unicode label ITU-R in an OID-IRI.
This identifier r-recommendation shall not be used as a 'NameForm', i.e., without its associated number 5 (see Rec. ITU-T X.680 | ISO/IEC 9834-1, A.5, for more details on this specific case).