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
|
|
---|---|---|---|
Authors | Cullen Jennings , Vijay Gurbani | ||
Last updated | 2015-10-14 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
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] RFC 5341 IANA Registry for TEL URI Parameters September 2008 parameter and the accompanying RFC or other permanent and readily available public specification should be consulted to find out the accepted set of values. A "No Value" in the column implies that the parameter is used either as a flag, or does not have a set ofShow full document text