OID repository - 0 = {itu-t(0)}


`itu-t(0)` [other identifiers: `ccitt`, `itu-r`] child OIDs: recommendation(0) question(1) administration(2) network-operator(3) identified-organization(4) r-recommendation(5) data(9)

OID description

	"itu-t" is a standardized identifier (this identifier may be used without its associated number in the ASN.1 notation of an OID).
OID:	{itu-t(0)}	(ASN.1 notation)
	0	(dot notation)
	/ITU-T	(OID-IRI notation)
	Other Unicode label (in place of "ITU-T"): ITU-R

Description:

International Telecommunication Union - Telecommunication standardization sector (ITU-T)

Information: Subsequent OIDs identify ITU-T Recommendations (not jointly published with ISO/IEC) and ITU members.

This arc is also called ccitt(0) to recall that CCITT used to be an organization independent from ITU-T.

Identifier itu-r was added by ITU-T Study Group 17 in March 2004 (and was ratified by ISO/IEC JTC 1/SC 6 in Sep 2005). It can only be used as a 'NameAndNumberForm' (that is, followed by number 5 between parentheses) for OIDs that commence with {itu-r(0) r-recommendation(5)} (see Rec. ITU-T X.680 | ISO/IEC 9834-1, clause A.5, for more details on this specific case). Consequently Unicode label "ITU-R" can only be used for "OID-IRIs" that designate OIDs under the {itu-r(0) r-recommendation(5)} arc.

Operation is in accordance with Rec. ITU-T X.660 | ISO/IEC 9834-1 and is under the guidance of ITU-T Study Group 17.

All decisions related to subsequent arcs, other than the assignment of additional secondary identifiers to top-level arc 0 (see Rec. ITU-T X.660 | ISO/IEC 9834-1, clause A.5), will be recorded as amendments to Rec. ITU-T X.660 | ISO/IEC 9834-1 (such changes to the joint ITU-T | ISO/IEC text will be regarded as editorial by ISO).

From Rec. ITU-T X.660 | ISO/IEC 9834-1, "the top-level arcs are restricted to three arcs numbered 0 to 2; and the arcs beneath root arcs 0 and 1 are restricted to forty arcs numbered 0 to 39. This enables optimized encodings to be used in which the values of the top two arcs for all arcs under top-level arcs 0 and 1 encode in a single octet in an object identifier encoding (see the Rec. ITU-T X.690 series | ISO/IEC 8825 multi-part Standard).

Current Registration Authority

Name:

ITU-T Study Group 17

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