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] [https://www.iana.org/assignments/xml-registry]
cpim-headers [RFC 3862] [https://www.iana.org/assignments/cpim-headers]
ecml [RFC 4112] [https://www.iana.org/assignments/ecml-parameters]
imdn [RFC 5438] [https://www.iana.org/assignments/imdn]
sieve [RFC 6134] [https://www.iana.org/assignments/sieve-extensions]
oauth [RFC 6755] [https://www.iana.org/assignments/oauth-parameters]
gss [RFC 7056] [https://www.iana.org/assignments/gss-api-parameters]
netconf [RFC 6241] [https://www.iana.org/assignments/netconf-capability-urns]
rtp-hdrext [RFC 8285] [https://www.iana.org/assignments/rtp-parameters#rtp-parameters-10]
geopriv [RFC 7035] [https://www.iana.org/assignments/geopriv-identifiers]
scim [RFC 7643] [https://www.iana.org/assignments/scim]
tzdist [RFC 7808] [https://www.iana.org/assignments/tzdist-identifiers]
abfab [RFC 7833] [https://www.iana.org/assignments/abfab-parameters]
push [RFC 8030] [https://www.iana.org/assignments/webpush-parameters]
restconf [RFC 8040] [https://www.iana.org/assignments/restconf-capability-urns]
mud [RFC 8520] [https://www.iana.org/assignments/mud]
rolie [RFC 8322] [https://www.iana.org/assignments/rolie]
acme [RFC 8555] [https://www.iana.org/assignments/acme]
jmap [RFC8620, Section 9.4] [https://www.iana.org/assignments/jmap]
capport:unrestricted [RFC 8910] [RFC 8910]
trans [RFC 9162] [https://www.iana.org/assignments/trans]
whip [RFC 9725] [https://www.iana.org/assignments/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 and 12.1 of [RFC 8428] and Section 3 of [RFC 8798], respectively (which, by the registration policy, are guaranteed to be non-overlapping).