Internet Engineering Task Force (IETF) S. Hollenbeck Request for Comments: 7451 Verisign Labs Category: Informational February 2015 ISSN: 2070-1721
Extension Registry for the Extensible Provisioning Protocol
The Extensible Provisioning Protocol (EPP) includes features to add functionality by extending the protocol. It does not, however, describe how those extensions are managed. This document describes a procedure for the registration and management of extensions to EPP, and it specifies a format for an IANA registry to record those extensions.
Status of This Memo
This document is not an Internet Standards Track specification; it is published for informational purposes.
This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Not all documents approved by the IESG are a candidate for any level of Internet Standard; see Section 2 of RFC 5741.
Copyright (c) 2015 IETF Trust and the persons identified as the document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License.
Domain name registries implement a variety of operational and business models. The differences in these models make it impossible to develop a "one size fits all" provisioning protocol; the Extensible Provisioning Protocol [RFC5730] was designed to focus on a minimal set of common functionality with built-in extension capabilities that allow new features to be specified on an "as needed" basis. Guidelines for extending EPP are documented in RFC 3735 [RFC3735].
RFCs 3735 and 5730 do not describe how extension development can be managed and coordinated. This has led to a situation in which server operators can develop different extensions to address similar needs, such as the provisioning of Value Added Tax (VAT) information. Clients then need to support multiple extensions that serve similar purposes, and interoperability suffers as a result.
An IANA registry can be used to help manage and coordinate the development of protocol extensions. This document describes an IANA registry that will be used to coordinate the development of EPP extensions.
Hollenbeck Informational [Page 2]
RFC 7451 EPP Extension Registry February 2015
2. Extension Specification and Registration Procedure
This section describes the format of an IANA registry and the procedures used to populate and manage registry entries.
This registry uses the "Specification Required" policy described in RFC 5226 [RFC5226]. An English language version of the extension specification will be referenced from the registry, though non- English versions of the specification may also be provided. Note that Section 2.1 of RFC 3735 [RFC3735] provides specific guidelines for documenting EPP extensions.
Note that the "Specification Required" policy implies review by a "designated expert". Section 3 of RFC 5226 [RFC5226] describes the role of designated experts and the function they perform.
A high-level description of the role of the designated expert is described in Section 3.2 of RFC 5226 [RFC5226]. Specific guidelines for the appointment of designated experts and the evaluation of EPP extensions are provided here.
The IESG should appoint a small pool of individuals (perhaps 3 - 5) to serve as designated experts, as described in Section 3.2 of RFC 5226 [RFC5226]. The pool should have a single administrative chair who is appointed by the IESG. The designated experts should use the existing eppext mailing list (firstname.lastname@example.org) for public discussion of registration requests. This implies that the mailing list should remain open after the work of the EPPEXT working group has concluded.
Extensions should be evaluated for architectural soundness using the guidelines described in RFC 3735 [RFC3735], including the Security Considerations section of that document. Expert evaluation should explicitly include consideration of the privacy consequences of proposed extensions, and, at a minimum, ensure that any privacy considerations are fully documented in the relevant specification(s).
The results of the evaluation should be shared via email with the registrant and the eppext mailing list. Issues discovered during the evaluation can be corrected by the registrant, and those corrections can be submitted to the designated experts until the designated experts explicitly decide to accept or reject the registration request. The designated experts must make an explicit decision and that decision must be shared via email with the registrant and the
Hollenbeck Informational [Page 3]
RFC 7451 EPP Extension Registry February 2015
eppext mailing list. If the specification for an extension is an IETF Standards Track document, no review is required by the designated expert.
Designated experts should be permissive in their evaluation of requests to register extensions that have been implemented and deployed by at least one registry/registrar pair. This implies that it may indeed be possible to register multiple extensions that provide the same functionality. Requests to register extensions that have not been deployed should be evaluated with a goal of reducing functional duplication. A potential registrant who submits a request to register a new, un-deployed extension that includes similar functionality to an existing, registered extension should be made aware of the existing extension. The registrant should be asked to reconsider their request given the existence of a similar extension. Should they decline to do so, perceived similarity should not be a sufficient reason for rejection as long as all other requirements are met.
The registry contains information describing each registered extension. Registry entries are created and managed by sending forms to IANA that describe the extension and the operation to be performed on the registry entry.
Name of Extension: A case-insensitive, ASCII text string that contains the name of the extension specification. Non-ASCII representations of the extension name can be included in the "Notes" described below.
Document Status: The document status ("Informational", "Standards Track", etc.) of the specification document. For documents that are not RFCs, this will always be "Informational".
Reference: A publicly available reference to the specification of this extension. This could be an RFC number or some other pointer to the document defining the extension.
Registrant Name and Email Address: The name and email address of the person that is responsible for managing the registry entry. If the registration is of an IETF Standards Track document, this can simply be listed as "IESG, <email@example.com>".
Hollenbeck Informational [Page 4]
RFC 7451 EPP Extension Registry February 2015
TLDs: A text string containing the top-level domain name (or domain names), including the preceding ".", for which the extension has been specified (e.g., ".org"). If there are multiple TLDs, they are given as a list of domain names separated by commas, (e.g. ".com", ".net"). Internationalized Domain Name (IDN) TLDs should be specified in A-label [RFC5890] format. If the extension is not associated with a specific top-level domain, the case-insensitive text string "Any" can be used to indicate that.
Status: Either "Active" or "Inactive". The "Active" status is used for extensions that are currently implemented and in use. The "Inactive" status is used for extensions that are not implemented or are otherwise not being used.
Notes: Either "None" or other text that describes optional notes to be included with the registered extension. If the Status value is "Inactive", text should be included to describe how and when this state was reached.
Registrants should send each registration form to IANA with a single record for incorporation into the registry. Send the form via email to <firstname.lastname@example.org> or complete the online form found on the IANA web site. The subject line should indicate whether the enclosed form represents an insertion of a new record (indicated by the word "INSERT" in the subject line) or a replacement of an existing record (indicated by the word "MODIFY" in the subject line). At no time can a record be deleted from the registry. On receipt of the registration request, IANA will initiate review by the designated expert(s), who will evaluate the request using the criteria in Section 2.1.1 in consultation with the eppext mailing list.
When submitting changes to existing registry entries, include text in the "Notes" field of the registration form describing the change. Under normal circumstances, registry entries are only to be updated by the registrant. If the registrant becomes unavailable or otherwise unresponsive, the designated expert can submit a registration form to IANA to update the registrant information. Entries can change state from "Active" to "Inactive" and back again as long as state-change requests conform to the processing requirements identified in this document. In addition to entries that become "Inactive" due to a lack of implementation, entries for which a specification becomes consistently unavailable over time should be marked "Inactive" by the designated expert until the specification again becomes reliably available.
IANA has created the "Extensions for the Extensible Provisioning Protocol (EPP)" registry to manage EPP extensions. This registry has its own heading on IANA's protocol listings. The information to be registered and the procedures to be followed in populating the registry are described in Section 2.
Name of registry: Extensions for the Extensible Provisioning Protocol (EPP)
Section at http://www.iana.org/protocols: Registry Title: Extensions for the Extensible Provisioning Protocol (EPP) Registry Name: Extensions for the Extensible Provisioning Protocol (EPP) Registration Procedure: Specification Required Reference: this document