The Internet Assigned Number Authority (IANA) tel Uniform Resource Identifier (URI) Parameter Registry
RFC 5341
| Document | Type |
RFC - Proposed Standard
(September 2008; No errata)
Updates RFC 3966
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 5341 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Jon Peterson | ||
| Send notices to | (None) | ||
Network Working Group C. Jennings
Request for Comments: 5341 Cisco Systems
Updates: 3966 V. Gurbani
Category: Standards Track Bell Laboratories, Alcatel-Lucent
September 2008
The Internet Assigned Number Authority (IANA)
tel Uniform Resource Identifier (URI) Parameter Registry
Status of This Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Abstract
This document creates an Internet Assigned Number Authority (IANA)
registry for tel Uniform Resource Identifier (URI) parameters and
their values. It populates the registry with the parameters defined
in the tel URI specification, along with the parameters in tel URI
extensions defined for number portability and trunk groups.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3. Use of the Registry . . . . . . . . . . . . . . . . . . . . . . 2
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 3
4.1. tel URI Parameters Registry . . . . . . . . . . . . . . . . 3
4.2. Registration Policy for tel URI Parameters . . . . . . . . 4
5. Security Considerations . . . . . . . . . . . . . . . . . . . . 5
6. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 5
7. References . . . . . . . . . . . . . . . . . . . . . . . . . . 5
7.1. Normative References . . . . . . . . . . . . . . . . . . . 5
7.2. Informative References . . . . . . . . . . . . . . . . . . 5
Jennings & Gurbani Standards Track [Page 1]
RFC 5341 IANA Registry for TEL URI Parameters September 2008
1. Introduction
The tel URI (RFC 3966 [1]), defines a URI that can be used to
represent resources identified by telephone numbers. The tel URI,
like many other URIs, provides extensibility through the definition
of new URI parameters and new values for existing parameters.
However, RFC 3966 did not specify an IANA registry where such
parameters and values can be listed and standardized. This
specification creates such a registry.
2. Terminology
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [2].
3. Use of the Registry
The tel URI parameters and values for these parameters MUST be
documented in a RFC or other permanent and readily available public
specification in order to be registered by IANA. This documentation
MUST fully explain the syntax, intended usage, and semantics of the
parameter. The intent of this requirement is to assure
interoperability between independent implementations, and to prevent
accidental namespace collisions between implementations of dissimilar
features.
Documents defining tel URI parameters or parameter values MUST
register them with IANA, as described in Section 4. The IANA
registration policy for such parameters is "Specification Required,
Designated Expert," and is further discussed in Section 4.2.
Some tel URI parameters only accept a set of predefined parameter
values while others can take any value. There are also parameters
that do not have any value; they are used as flags.
Those URI parameters that take on predefined values typically take on
a large number of values. Registering each of those values, or
creating a sub-registry for each such parameter is not appropriate.
Instead, we have chosen to register URI parameter values by
reference. That is, the entry in the URI parameter registry for a
given URI parameter contains references to the RFCs defining new
values of that parameter.
Accordingly, the tel URI parameter registry contains a column that
indicates whether or not each parameter accepts a value. The column
may contain "No value" or "Constrained". A "Constrained" in the
column implies that certain predefined values exist for this
Jennings & Gurbani Standards Track [Page 2]
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