Uniform Resource Name (URN) Namespace for IETF Use

Created
2003-05-19
Last Updated
2026-02-02
Note
This is the official registry for the 'params' section of the 'IETF'
URN Namespace.
Available Formats

XML
HTML
TXT

Registries Included Below

IETF URN Sub-namespaces

Registration Procedure(s)
            IETF Review
Reference
[RFC 6924]
Available Formats

CSV
Sub-namespace Reference IANA Registry Reference
rfc [RFC 2648] none
fyi [RFC 2648] none
std [RFC 2648] none
bcp [RFC 2648] none
id [RFC 2648] none
mtg [RFC 2648] none
params [RFC 3553] [https://www.iana.org/assignments/params/params.xml#params-1]

IETF URN Sub-namespace for Registered Protocol Parameter Identifiers

Registration Procedure(s)
            IETF Review
Reference
[RFC 3553]
Available Formats

CSV
Registered Parameter Identifier Reference IANA Registry Reference
xml [RFC 3688] [IETF XML Registry]
cpim-headers [RFC 3862] [Common Presence and Instant Messaging (CPIM) Headers]
ecml [RFC 4112] [Electronic Commerce Modeling Language (ECML) Parameters]
imdn [RFC 5438] [Instant Message Disposition Notification (IMDN) Headers]
sieve [RFC 6134] [Sieve Extensions]
oauth [RFC 6755] [OAuth Parameters]
gss [RFC 7056] [Generic Security Service Application Program Interface Parameters]
netconf [RFC 6241] [Network Configuration Protocol (NETCONF) Capability URNs]
rtp-hdrext [RFC 8285] [RTP Compact Header Extensions]
geopriv [RFC 7035] [Geopriv Identifiers]
scim [RFC 7643] [System for Cross-domain Identity Management (SCIM) Schema URIs]
tzdist [RFC 7808] [Time Zone Data Distribution Service (TZDIST) Identifiers]
abfab [RFC 7833] [Application Bridging for Federated Access Beyond Web (ABFAB) Parameters]
push [RFC 8030] [Web Push Parameters]
restconf [RFC 8040] [RESTCONF Capability URNs]
mud [RFC 8520] [Manufacturer Usage Description (MUD)]
rolie [RFC 8322] [Resource-Oriented Lightweight Information Exchange (ROLIE) URN Parameters]
acme [RFC 8555] [Automated Certificate Management Environment (ACME) Protocol]
jmap [RFC 8620, Section 9.4] [JSON Meta Application Protocol (JMAP)]
capport:unrestricted [RFC 8910] [RFC 8910]
trans [RFC 9162] [Public Notary Transparency]
whip [RFC 9725] [WebRTC-HTTP Ingestion Protocol (WHIP)]
unit [RFC 9880] Combining the symbol values from the [SenML Units] registry and the [Secondary Units] registry in the [Sensor Measurement Lists (SenML)] registry group as specified by [Sections 4.5.2, 12.1 of RFC 8428] and [Section 3 of RFC 8798], respectively (which, by the registration policy, are guaranteed to be non-overlapping).