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Internet Engineering Task Force (IETF) R. Carney
Request for Comments: 8748 GoDaddy Inc.
Category: Standards Track G. Brown
ISSN: 2070-1721 CentralNic Group plc
J. Frakes
March 2020
Registry Fee Extension for the Extensible Provisioning Protocol (EPP)
Abstract
Given the expansion of the DNS namespace and the proliferation of
novel business models, it is desirable to provide a method for
Extensible Provisioning Protocol (EPP) clients to query EPP servers
for the fees and credits associated with various billable
transactions and provide expected fees and credits for certain
commands and objects. This document describes an EPP extension
mapping for registry fees.
Status of This Memo
This is an Internet Standards Track document.
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). Further information on
Internet Standards is available in Section 2 of RFC 7841.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
https://www.rfc-editor.org/info/rfc8748.
Copyright Notice
Copyright (c) 2020 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
(https://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.
Table of Contents
1. Introduction
1.1. Conventions Used in This Document
2. Migrating to Newer Versions of This Extension
3. Extension Elements
3.1. Client Commands
3.2. Currency Codes
3.3. Validity Periods
3.4. Fees and Credits
3.4.1. Refunds
3.4.2. Grace Periods
3.4.3. Correlation between Refundability and Grace Periods
3.4.4. Applicability
3.5. Account Balance
3.6. Credit Limit
3.7. Classification of Objects
3.8. "Phase" and "Subphase" Attributes
3.9. Reason
4. Server Handling of Fee Information
5. EPP Command Mapping
5.1. EPP Query Commands
5.1.1. EPP <check> Command
5.1.2. EPP Transfer Query Command
5.2. EPP Transform Commands
5.2.1. EPP <create> Command
5.2.2. EPP <delete> Command
5.2.3. EPP <renew> Command
5.2.4. EPP <transfer> Command
5.2.5. EPP <update> Command
6. Formal Syntax
6.1. Fee Extension Schema
7. Security Considerations
8. IANA Considerations
8.1. XML Namespace
8.2. EPP Extension Registry
9. References
9.1. Normative References
9.2. Informative References
Acknowledgements
Authors' Addresses
1. Introduction
Historically, domain name registries have applied a simple fee
structure for billable transactions, namely a basic unit price
applied to domain <create>, <renew>, <transfer>, and Redemption Grace
Period (RGP) [RFC3915] restore commands. Given the relatively small
number of EPP servers to which EPP clients have been required to
connect, it has generally been the case that client operators have
been able to obtain details of these fees out of band by contacting
the server operators.
Given the expansion of the DNS namespace and the proliferation of
novel business models, it is desirable to provide a method for EPP
clients to query EPP servers for the fees and credits associated with
various billable transactions and certain commands and specific
objects.
This document describes an extension mapping for version 1.0 of the
Extensible Provisioning Protocol (EPP) [RFC5730]. This EPP mapping
provides a mechanism by which EPP clients may query the fees and
credits associated with various billable transactions and obtain
their current account balance.
1.1. Conventions Used in This Document
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in
BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all
capitals, as shown here.
XML is case sensitive. Unless stated otherwise, the XML
specifications and examples provided in this document MUST be
interpreted in the character case presented in order to develop a
conforming implementation.
"fee" is used as an abbreviation for "urn:ietf:params:xml:ns:epp:fee-
1.0". The XML namespace prefix "fee" is used, but implementations
MUST NOT depend on it and instead employ a proper namespace-aware XML
parser and serializer to interpret and output the XML documents.
In the examples, "C:" represents lines sent by a protocol client, and
"S:" represents lines returned by a protocol server. Indentation and
white space in the examples are provided only to illustrate element
relationships and are not a required feature of this protocol.
2. Migrating to Newer Versions of This Extension
Servers that implement this extension SHOULD provide a way for
clients to progressively update their implementations when a new
version of the extension is deployed.
Servers SHOULD (for a temporary migration period) provide support for
older versions of the extension in parallel to the newest version and
allow clients to select their preferred version via the
<svcExtension> element of the <login> command.
If a client requests multiple versions of the extension at login,
then, when preparing responses to commands that do not include
extension elements, the server SHOULD only include extension elements
in the namespace of the newest version of the extension requested by
the client.
When preparing responses to commands that do include extension
elements, the server SHOULD only include extension elements for the
extension versions present in the command.
3. Extension Elements
3.1. Client Commands
The <fee:command> element is used in the EPP <check> command to
determine the fee that is applicable to the given command.
The "name" attribute of the <fee:command> is used to define which
transform fees the client is requesting information about. The
possible values for the "name" attribute are:
* "create", indicating a <create> command as defined in [RFC5730].
* "delete", indicating a <delete> command as defined in [RFC5730].
* "renew", indicating a <renew> command as defined in [RFC5730].
* "update", indicating a <update> command as defined in [RFC5730].
* "transfer", indicating a <transfer> command as defined in
[RFC5730].
* If the server supports registry grace period mapping [RFC3915],
then the server MUST also support the "restore" value as defined
in [RFC3915].
* "custom", indicating a custom command that MUST set the
"customName" attribute with a custom command name. The possible
set of custom command name values is dictated by the server
policy.
The <fee:command> element MAY have an OPTIONAL "phase" attribute
specifying a launch phase as described in [RFC8334]. It may also
contain an OPTIONAL "subphase" attribute identifying the custom or
subphase as described in [RFC8334].
3.2. Currency Codes
The <fee:currency> element is used to indicate the currency in which
fees are charged. The value of this element MUST be a three-
character currency code from [ISO4217_2015].
Note that [ISO4217_2015] provides the special "XXX" code, which MAY
be used if the server uses a non-currency-based system for assessing
fees, such as a system of credits.
The use of <fee:currency> elements in client commands is OPTIONAL: if
a <fee:currency> element is not present in a command, the server MUST
determine the currency based on the server default currency or on the
client's account settings, which are agreed to by the client and
server via an out-of-band channel. However, the <fee:currency>
element MUST be present in the responses.
Servers SHOULD NOT perform a currency conversion if a client uses an
incorrect currency code. Servers SHOULD return a 2004 "Parameter
value range error" instead.
3.3. Validity Periods
When querying for fee information using the <check> command, the
<fee:period> element is used to indicate the validity period, which
is to be added to extend the registration period of objects by the
<create>, <renew>, and <transfer> commands. Validity periods are
measured in years or months, with the appropriate units specified
using the "unit" attribute. Valid values for the "unit" attribute
are "y" for years and "m" for months. This element is derived from
the <domain:period> element described in [RFC5731].
The <fee:period> element is OPTIONAL in <check> commands; if omitted,
the server MUST determine the fee(s) using the server default period.
The <fee:period> element MUST be present in <check> responses.
3.4. Fees and Credits
Servers that implement this extension will include elements in
responses that provide information about the fees and/or credits
associated with a given billable transaction. A fee will result in
subtracting from the Account Balance (described in Section 3.5), and
a credit will result in adding to the Account Balance (described in
Section 3.5).
The <fee:fee> and <fee:credit> elements are used to provide this
information. The presence of a <fee:fee> element in a response
indicates a debit against the client's account balance; a
<fee:credit> element indicates a credit. A <fee:fee> element MUST
have a zero or greater (non-negative) value. A <fee:credit> element
MUST have a negative value.
A server MAY respond with multiple <fee:fee> and <fee:credit>
elements in the same response. In such cases, the net fee or credit
applicable to the transaction is the arithmetic sum of the values of
each of the <fee:fee> and/or <fee:credit> elements. This amount
applies to the total additional validity period for the object (where
applicable).
The following attributes are defined for the <fee:fee> element.
These are described in detail below:
description: an OPTIONAL attribute that provides a human-readable
description of the fee. Servers should provide documentation on
the possible values of this attribute and their meanings. An
OPTIONAL "lang" attribute MAY be present, per the language
structure in [RFC5646], to identify the language of the returned
text and has a default value of "en" (English). If the
"description" attribute is not present, the "lang" attribute can
be ignored.
refundable: an OPTIONAL boolean attribute indicating whether the fee
is refundable if the object is deleted.
grace-period: an OPTIONAL attribute that provides the time period
during which the fee is refundable.
applied: an OPTIONAL attribute indicating when the fee will be
deducted from the client's account.
The <fee:credit> element can take a "description" attribute as
described above. An OPTIONAL "lang" attribute MAY be present to
identify the language of the returned text and has a default value of
"en" (English).
3.4.1. Refunds
<fee:fee> elements MAY have an OPTIONAL "refundable" attribute that
takes a boolean value. Fees may be refunded under certain
circumstances, such as when a domain application is rejected (as
described in [RFC8334]) or when an object is deleted during the
relevant grace period (see Section 3.4.2).
If the "refundable" attribute is omitted, then clients SHOULD NOT
make any assumptions about the refundability of the fee.
3.4.2. Grace Periods
[RFC3915] describes a system of "grace periods", which are time
periods following a billable transaction during which, if an object
is deleted, the client receives a refund.
The "grace-period" attribute MAY be used to indicate the relevant
grace period for a fee. If a server implements the registry grace
period extension [RFC3915], it MUST specify the grace period for all
relevant transactions.
If the "grace-period" attribute is omitted, then clients SHOULD NOT
make any assumptions about the grace period of the fee.
3.4.3. Correlation between Refundability and Grace Periods
If a <fee:fee> element has a "grace-period" attribute, then it MUST
also be refundable, and the "refundable" attribute MUST be true. If
the "refundable" attribute of a <fee:fee> element is false, then it
MUST NOT have a "grace-period" attribute.
3.4.4. Applicability
Fees may be applied immediately upon receipt of a command from a
client or may only be applied once an out-of-band process (such as
the processing of applications at the end of a launch phase) has
taken place.
The "applied" attribute of the <fee:fee> element allows servers to
indicate whether a fee will be applied immediately or whether it will
be applied at some point in the future. This attribute takes two
possible values: "immediate" or "delayed".
3.5. Account Balance
The <fee:balance> element is an OPTIONAL element that MAY be included
in server responses to transform commands. If present, it can be
used by the client to determine the remaining credit at the server.
Whether or not the <fee:balance> is included in responses is a matter
of server policy. However, if a server chooses to offer support for
this element, it MUST be included in responses to all "transform" or
billable commands (e.g., <create>, <renew>, <update>, <delete>,
<transfer op="request">).
The value of the <fee:balance> MAY be negative. A negative balance
indicates that the server has extended a line of credit to the client
(see Section 3.6).
If a server includes a <fee:balance> element in response to transform
commands, the value of the element MUST reflect the client's account
balance after any fees or credits associated with that command have
been applied. If the "applied" attribute of the <fee:fee> element is
"delayed", then the <fee:balance> MUST reflect the client's account
balance without any fees or credits associated with that command.
3.6. Credit Limit
As described above, if a server returns a response containing a
<fee:balance> with a negative value, then the server has extended a
line of credit to the client. A server MAY also include in responses
a <fee:creditLimit> element that indicates the maximum credit
available to a client. A server MAY reject certain transactions if
the absolute value of the <fee:balance> is equal to or exceeds the
value of the <fee:creditLimit> element.
Whether or not the <fee:creditLimit> is included in responses is a
matter of server policy. However, if a server chooses to offer
support for this element, it MUST be included in responses to all
"transform" commands (e.g., <create>, <renew>, <update>, <delete>,
<transfer op="request">).
3.7. Classification of Objects
Objects may be assigned to a particular class, category, or tier,
each of which has a particular fee or set of fees associated with it.
The <fee:class> element, which MAY appear in <check> and transform
responses, is used to indicate the classification of an object.
If a server makes use of this element, it should provide clients with
a list of all the values that the element may take via an out-of-band
channel. Servers MUST NOT use values that do not appear on this
list.
Servers that make use of this element MUST use a <fee:class> element
with the value "standard" for all objects that are subject to the
standard or default fee.
3.8. "Phase" and "Subphase" Attributes
The <fee:command> element has two attributes, "phase" and "subphase",
that provide additional information related to a specific launch
phase, as described in [RFC8334]. These attributes are used as
filters that should refine the server processing.
If the client <fee:command> contains a server-supported combination
of phase/subphase, the server MUST return the fee data (including the
phase/subphase attribute(s)) for the specific combination.
If the client <fee:command> contains no "phase"/"subphase" attributes
and the server has only one active phase/subphase combination, the
server MUST return the data (including the "phase"/"subphase"
attribute(s)) of the currently active phase/subphase.
If the client <fee:command> contains no phase/subphase attributes and
the server has more than one active phase/subphase combination, the
server MUST respond with a 2003 "Required parameter missing" error.
If the client <fee:command> contains no phase/subphase attributes and
the server is currently in a "quiet period" (e.g., not accepting
registrations or applications), the server MUST return data
consistent with the default general availability phase (e.g., "open"
or "claims"), including the appropriate phase/subphase attribute(s).
If the client <fee:command> contains a phase attribute with no
subphase and the server has only one active subphase (or no subphase)
of this phase, the server MUST return the data (including the phase/
subphase attribute(s)) of the provided phase and currently active
subphase.
If the client <fee:command> contains a phase attribute with no
subphase and the server has more than one active subphase combination
of this phase, the server MUST respond with a 2003 "Required
parameter missing" error.
If the client <fee:command> contains a subphase with no phase
attribute, the server MUST respond with a 2003 "Required parameter
missing" error.
If the client <fee:command> contains a phase attribute not defined in
[RFC8334] or not supported by the server, the server MUST respond
with a 2004 "Parameter value range error".
If the client <fee:command> contains a subphase attribute (or phase/
subphase combination) not supported by the server, the server MUST
respond with a 2004 "Parameter value range error".
3.9. Reason
The <fee:reason> element is used to provide server-specific text in
an effort to better explain why a <check> command did not complete as
the client expected. An OPTIONAL "lang" attribute MAY be present to
identify the language, per the language structure in [RFC5646], of
the returned text and has a default value of "en" (English).
The <fee:reason> element can be used within the server response
<fee:command> element or within the <fee:cd> element. See
Section 5.1.1 for details on the <fee:cd> "check data" element.
If the server cannot calculate the relevant fees because the object,
command, currency, period, class, or some combination is invalid per
server policy, the server has two ways of handling the error
processing of <fee:command> element(s):
1. Fast-fail: The server, upon error identification, MAY stop
processing <fee:command> elements and return a <fee:cd> to the
client containing the <fee:objID> and a <fee:reason> element
detailing the reason for failure.
S: <fee:cd avail="0">
S: <fee:objID>example.xyz</fee:objID>
S: <fee:reason>Only 1 year registration periods are
S: valid.</fee:reason>
S: </fee:cd>
2. Partial-fail: The server, upon error identification, MAY continue
processing <fee:command> elements and return a <fee:cd> to the
client containing the successfully processed <fee:command>
elements and failed <fee:command> elements. All returned failed
<fee:command> elements MUST have a <fee:reason> element detailing
the reason for failure, and the server MAY additionally include a
<fee:reason> element at the <fee:cd> level.
S: <fee:cd avail="0">
S: <fee:objID>example.xyz</fee:objID>
S: <fee:command name="create">
S: <fee:period unit="y">2</fee:period>
S: <fee:reason>Only 1 year registration periods are
S: valid.</fee:reason>
S: </fee:command>
S: </fee:cd>
In either failure scenario, the server MUST set the <fee:cd> "avail"
attribute to false (0), and the server MUST process all objects in
the client request.
4. Server Handling of Fee Information
Depending on the server policy, a client MAY be required to include
the extension elements described in this document for certain
transform commands. Servers must provide clear documentation to
clients about the circumstances in which this extension must be used.
The server MUST return avail="0" in its response to a <check> command
for any object in the <check> command that does not include the
<fee:check> extension where the server would fail a domain <create>
command when no <fee> extension is provided for that same object.
If a server receives a <check> command from a client that results in
no possible fee combination, the server MUST set the "avail"
attribute of the <fee:cd> element to false (0) and provide a
<fee:reason>.
If a server receives a <check> command from a client that results in
an ambiguous result (i.e., multiple possible fee combinations), the
server MUST reject the command with a 2003 "Required parameter
missing" error.
If a server receives a command from a client that does not include
the fee extension data elements required by the server for that
command, then the server MUST respond with a 2003 "Required parameter
missing" error.
If the total fee provided by the client is less than the server's own
calculation of the fee or the server determines the currency is
inappropriate for that command, then the server MUST reject the
command with a 2004 "Parameter value range error".
5. EPP Command Mapping
A detailed description of the EPP syntax and semantics can be found
in [RFC5730].
5.1. EPP Query Commands
This extension does not add any elements to the EPP <poll> or <info>
commands or responses.
5.1.1. EPP <check> Command
This extension defines a new command called the Fee Check Command
that defines additional elements for the EPP <check> command to
provide fee information.
The command MAY contain an <extension> element, which MAY contain a
<fee:check> element. The <fee:check> element MAY contain one
<fee:currency> element and MUST contain one or more <fee:command>
elements.
The <fee:command> element(s) MUST contain a "name" attribute (see
Section 3.1), an OPTIONAL "phase" attribute, and an OPTIONAL
"subphase" attribute (see Section 3.8). The <fee:command> element(s)
MAY have the following child elements:
* An OPTIONAL <fee:period> element (as described in Section 3.3).
Example <check> command:
C: <?xml version="1.0" encoding="utf-8" standalone="no"?>
C: <epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <check>
C: <domain:check
C: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
C: <domain:name>example.com</domain:name>
C: <domain:name>example.net</domain:name>
C: <domain:name>example.xyz</domain:name>
C: </domain:check>
C: </check>
C: <extension>
C: <fee:check xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
C: <fee:currency>USD</fee:currency>
C: <fee:command name="create">
C: <fee:period unit="y">2</fee:period>
C: </fee:command>
C: <fee:command name="renew"/>
C: <fee:command name="transfer"/>
C: <fee:command name="restore"/>
C: </fee:check>
C: </extension>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C: </epp>
When the server receives a <check> command that includes the
extension elements described above, its response MUST contain an
<extension> element, which MUST contain a child <fee:chkData>
element. The <fee:chkData> element MUST contain a <fee:currency>
element and a <fee:cd> element for each object referenced in the
client <check> command.
Each <fee:cd> (check data) element MUST contain the following child
elements:
* A <fee:objID> element, which MUST match an element referenced in
the client <check> command.
* An OPTIONAL <fee:class> element (as described in Section 3.7).
* A <fee:command> element matching each <fee:command> (unless the
"avail" attribute of the <fee:cd> is false) that appeared in the
corresponding <fee:check> of the client command. This element MAY
have the OPTIONAL "standard" attribute, with a default value of
"0" (or "false"), which indicates whether the fee is the standard
or default fee (see Section 3.7). This element MAY have the
OPTIONAL "phase" and "subphase" attributes, which will match the
same attributes in the corresponding <fee:command> element of the
client command if sent by the client.
The <fee:cd> element also has an OPTIONAL "avail" attribute, which is
a boolean. If the value of this attribute evaluates to false, this
indicates that the server cannot calculate the relevant fees because
the object, command, currency, period, class, or some combination is
invalid per server policy. If "avail" is false, then the <fee:cd> or
the <fee:command> element MUST contain a <fee:reason> element (as
described in Section 3.9), and the server MAY eliminate some or all
of the <fee:command> element(s).
The <fee:command> element(s) MAY have the following child elements:
* An OPTIONAL <fee:period> element (as described in Section 3.3),
which contains the same unit, if present, that appeared in the
<fee:period> element of the command. If the value of the parent
<fee:command> element is "restore", this element MUST NOT be
included; otherwise, it MUST be included. If no <fee:period>
appeared in the client command (and the command is not "restore"),
then the server MUST return its default period value.
* Zero or more <fee:fee> elements (as described in Section 3.4).
* Zero or more <fee:credit> elements (as described in Section 3.4).
* An OPTIONAL <fee:reason> element (as described in Section 3.9).
If the "avail" attribute of the <fee:cd> element is true (1) and if
no <fee:fee> elements are present in a <fee:command> element, this
indicates that no fee will be assessed by the server for this
command.
If the "avail" attribute of the <fee:cd> element is true (1), then
the <fee:command> element MUST NOT contain a <fee:reason> element.
Example <check> response:
S: <?xml version="1.0" encoding="utf-8" standalone="no"?>
S: <epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <resData>
S: <domain:chkData
S: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
S: <domain:cd>
S: <domain:name avail="1">example.com</domain:name>
S: </domain:cd>
S: <domain:cd>
S: <domain:name avail="1">example.net</domain:name>
S: </domain:cd>
S: <domain:cd>
S: <domain:name avail="1">example.xyz</domain:name>
S: </domain:cd>
S: </domain:chkData>
S: </resData>
S: <extension>
S: <fee:chkData
S: xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
S: <fee:currency>USD</fee:currency>
S: <fee:cd avail="1">
S: <fee:objID>example.com</fee:objID>
S: <fee:class>Premium</fee:class>
S: <fee:command name="create">
S: <fee:period unit="y">2</fee:period>
S: <fee:fee
S: description="Registration Fee"
S: refundable="1"
S: grace-period="P5D">10.00</fee:fee>
S: </fee:command>
S: <fee:command name="renew">
S: <fee:period unit="y">1</fee:period>
S: <fee:fee
S: description="Renewal Fee"
S: refundable="1"
S: grace-period="P5D">10.00</fee:fee>
S: </fee:command>
S: <fee:command name="transfer">
S: <fee:period unit="y">1</fee:period>
S: <fee:fee
S: description="Transfer Fee"
S: refundable="1"
S: grace-period="P5D">10.00</fee:fee>
S: </fee:command>
S: <fee:command name="restore">
S: <fee:fee
S: description="Redemption Fee">15.00</fee:fee>
S: </fee:command>
S: </fee:cd>
S: <fee:cd avail="1">
S: <fee:objID>example.net</fee:objID>
S: <fee:class>standard</fee:class>
S: <fee:command name="create" standard="1">
S: <fee:period unit="y">2</fee:period>
S: <fee:fee
S: description="Registration Fee"
S: refundable="1"
S: grace-period="P5D">5.00</fee:fee>
S: </fee:command>
S: <fee:command name="renew" standard="1">
S: <fee:period unit="y">1</fee:period>
S: <fee:fee
S: description="Renewal Fee"
S: refundable="1"
S: grace-period="P5D">5.00</fee:fee>
S: </fee:command>
S: <fee:command name="transfer" standard="1">
S: <fee:period unit="y">1</fee:period>
S: <fee:fee
S: description="Transfer Fee"
S: refundable="1"
S: grace-period="P5D">5.00</fee:fee>
S: </fee:command>
S: <fee:command name="restore" standard="1">
S: <fee:fee
S: description="Redemption Fee">5.00</fee:fee>
S: </fee:command>
S: </fee:cd>
S: <fee:cd avail="0">
S: <fee:objID>example.xyz</fee:objID>
S: <fee:command name="create">
S: <fee:period unit="y">2</fee:period>
S: <fee:reason>Only 1 year registration periods are
S: valid.</fee:reason>
S: </fee:command>
S: </fee:cd>
S: </fee:chkData>
S: </extension>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54322-XYZ</svTRID>
S: </trID>
S: </response>
S: </epp>
5.1.2. EPP Transfer Query Command
This extension does not add any elements to the EPP <transfer> query
command, but it does include elements in the response when the
extension is included in the <login> command service extensions.
When the <transfer> query command has been processed successfully, if
the client has included the extension in the <login> command service
<svcExtension> element, and if the client is authorized by the server
to view information about the transfer, then the server MAY include
in the <extension> section of the EPP response a <fee:trnData>
element, which contains the following child elements:
* A <fee:currency> element (as described in Section 3.2).
* A <fee:period> element (as described in Section 3.3).
* Zero or more <fee:fee> elements (as described in Section 3.4)
containing the fees that will be charged to the gaining client.
* Zero or more <fee:credit> elements (as described in Section 3.4)
containing the credits that will be refunded to the losing client.
Servers SHOULD omit <fee:credit> when returning a response to the
gaining client and omit <fee:fee> elements when returning a response
to the losing client.
If no <fee:trnData> element is included in the response, then no fee
will be assessed by the server for the transfer.
Example <transfer> query response:
S: <?xml version="1.0" encoding="utf-8" standalone="no"?>
S: <epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1001">
S: <msg>Command completed successfully; action pending</msg>
S: </result>
S: <resData>
S: <domain:trnData
S: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
S: <domain:name>example.com</domain:name>
S: <domain:trStatus>pending</domain:trStatus>
S: <domain:reID>ClientX</domain:reID>
S: <domain:reDate>2019-06-08T22:00:00.0Z</domain:reDate>
S: <domain:acID>ClientY</domain:acID>
S: <domain:acDate>2019-06-13T22:00:00.0Z</domain:acDate>
S: <domain:exDate>2021-09-08T22:00:00.0Z</domain:exDate>
S: </domain:trnData>
S: </resData>
S: <extension>
S: <fee:trnData xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
S: <fee:currency>USD</fee:currency>
S: <fee:period unit="y">1</fee:period>
S: <fee:fee>5.00</fee:fee>
S: </fee:trnData>
S: </extension>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54322-XYZ</svTRID>
S: </trID>
S: </response>
S: </epp>
5.2. EPP Transform Commands
5.2.1. EPP <create> Command
This extension adds elements to both the EPP <create> command and
response when the extension is included in the <login> command
service extensions.
When submitting a <create> command to the server, the client MAY
include in the <extension> element a <fee:create> element, which
includes the following child elements:
* An OPTIONAL <fee:currency> element (as described in Section 3.2).
* One or more <fee:fee> elements (as described in Section 3.4).
When the <create> command has been processed successfully, the client
included the extension in the <login> command service extensions, and
a fee was assessed by the server for the transaction, the server MUST
include in the <extension> section of the EPP response a
<fee:creData> element, which contains the following child elements:
* A <fee:currency> element (as described in Section 3.2).
* Zero or more <fee:fee> elements (as described in Section 3.4).
* Zero or more <fee:credit> elements (as described in Section 3.4).
* An OPTIONAL <fee:balance> element (as described in Section 3.5).
* An OPTIONAL <fee:creditLimit> element (as described in
Section 3.6).
Example <create> command:
C: <?xml version="1.0" encoding="utf-8" standalone="no"?>
C: <epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <create>
C: <domain:create
C: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
C: <domain:name>example.com</domain:name>
C: <domain:period unit="y">2</domain:period>
C: <domain:ns>
C: <domain:hostObj>ns1.example.net</domain:hostObj>
C: <domain:hostObj>ns2.example.net</domain:hostObj>
C: </domain:ns>
C: <domain:registrant>jd1234</domain:registrant>
C: <domain:contact type="admin">sh8013</domain:contact>
C: <domain:contact type="tech">sh8013</domain:contact>
C: <domain:authInfo>
C: <domain:pw>2fooBAR</domain:pw>
C: </domain:authInfo>
C: </domain:create>
C: </create>
C: <extension>
C: <fee:create xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
C: <fee:currency>USD</fee:currency>
C: <fee:fee>5.00</fee:fee>
C: </fee:create>
C: </extension>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C: </epp>
Example <create> response:
S: <?xml version="1.0" encoding="utf-8" standalone="no"?>
S: <epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <resData>
S: <domain:creData
S: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
S: <domain:name>example.com</domain:name>
S: <domain:crDate>2019-04-03T22:00:00.0Z</domain:crDate>
S: <domain:exDate>2021-04-03T22:00:00.0Z</domain:exDate>
S: </domain:creData>
S: </resData>
S: <extension>
S: <fee:creData xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
S: <fee:currency>USD</fee:currency>
S: <fee:fee
S: description="Registration Fee"
S: lang="en"
S: refundable="1"
S: grace-period="P5D">5.00</fee:fee>
S: <fee:balance>-5.00</fee:balance>
S: <fee:creditLimit>1000.00</fee:creditLimit>
S: </fee:creData>
S: </extension>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </trID>
S: </response>
S: </epp>
5.2.2. EPP <delete> Command
This extension does not add any elements to the EPP <delete> command,
but it does include elements in the response when the extension is
included in the <login> command service extensions.
When the <delete> command has been processed successfully and the
client included the extension in the <login> command service
extensions, the server MAY include in the <extension> section of the
EPP response a <fee:delData> element, which contains the following
child elements:
* A <fee:currency> element (as described in Section 3.2).
* Zero or more <fee:fee> elements (as described in Section 3.4).
* Zero or more <fee:credit> elements (as described in Section 3.4).
* An OPTIONAL <fee:balance> element (as described in Section 3.5).
* An OPTIONAL <fee:creditLimit> element (as described in
Section 3.6).
Example <delete> response:
S: <?xml version="1.0" encoding="utf-8" standalone="no"?>
S: <epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <extension>
S: <fee:delData
S: xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
S: <fee:currency>USD</fee:currency>
S: <fee:credit
S: description="AGP Credit"
S: lang="en">-5.00</fee:credit>
S: <fee:balance>1005.00</fee:balance>
S: </fee:delData>
S: </extension>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </trID>
S: </response>
S: </epp>
5.2.3. EPP <renew> Command
This extension adds elements to both the EPP <renew> command and
response when the extension is included in the <login> command
service extensions.
When submitting a <renew> command to the server, the client MAY
include in the <extension> element a <fee:renew> element, which
includes the following child elements:
* An OPTIONAL <fee:currency> element (as described in Section 3.2).
* One or more <fee:fee> elements (as described in Section 3.4).
When the <renew> command has been processed successfully and the
client included the extension in the <login> command service
extensions, the server MAY include in the <extension> section of the
EPP response a <fee:renData> element, which contains the following
child elements:
* A <fee:currency> element (as described in Section 3.2).
* Zero or more <fee:fee> elements (as described in Section 3.4).
* Zero or more <fee:credit> elements (as described in Section 3.4).
* An OPTIONAL <fee:balance> element (as described in Section 3.5).
* An OPTIONAL <fee:creditLimit> element (as described in
Section 3.6).
Example <renew> command:
C: <?xml version="1.0" encoding="utf-8" standalone="no"?>
C: <epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <renew>
C: <domain:renew
C: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
C: <domain:name>example.com</domain:name>
C: <domain:curExpDate>2019-04-03</domain:curExpDate>
C: <domain:period unit="y">5</domain:period>
C: </domain:renew>
C: </renew>
C: <extension>
C: <fee:renew xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
C: <fee:currency>USD</fee:currency>
C: <fee:fee>5.00</fee:fee>
C: </fee:renew>
C: </extension>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C: </epp>
Example <renew> response:
S: <?xml version="1.0" encoding="utf-8" standalone="no"?>
S: <epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <resData>
S: <domain:renData
S: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
S: <domain:name>example.com</domain:name>
S: <domain:exDate>2024-04-03T22:00:00.0Z</domain:exDate>
S: </domain:renData>
S: </resData>
S: <extension>
S: <fee:renData xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
S: <fee:currency>USD</fee:currency>
S: <fee:fee
S: refundable="1"
S: grace-period="P5D">5.00</fee:fee>
S: <fee:balance>1000.00</fee:balance>
S: </fee:renData>
S: </extension>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54322-XYZ</svTRID>
S: </trID>
S: </response>
S: </epp>
5.2.4. EPP <transfer> Command
This extension adds elements to both the EPP <transfer> command and
response when the value of the "op" attribute of the <transfer>
command element is "request" and the extension is included in the
<login> command service extensions.
When submitting a <transfer> command to the server, the client MAY
include in the <extension> element a <fee:transfer> element, which
includes the following child elements:
* An OPTIONAL <fee:currency> element (as described in Section 3.2).
* One or more <fee:fee> elements (as described in Section 3.4).
When the <transfer> command has been processed successfully and the
client included the extension in the <login> command service
extensions, the server MAY include in the <extension> section of the
EPP response a <fee:trnData> element, which contains the following
child elements:
* A <fee:currency> element (as described in Section 3.2).
* Zero or more <fee:fee> elements (as described in Section 3.4).
* Zero or more <fee:credit> elements (as described in Section 3.4).
* An OPTIONAL <fee:balance> element (as described in Section 3.5).
* An OPTIONAL <fee:creditLimit> element (as described in
Section 3.6).
Example <transfer> command:
C: <?xml version="1.0" encoding="utf-8" standalone="no"?>
C: <epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <transfer op="request">
C: <domain:transfer
C: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
C: <domain:name>example.com</domain:name>
C: <domain:period unit="y">1</domain:period>
C: <domain:authInfo>
C: <domain:pw roid="JD1234-REP">2fooBAR</domain:pw>
C: </domain:authInfo>
C: </domain:transfer>
C: </transfer>
C: <extension>
C: <fee:transfer xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
C: <fee:currency>USD</fee:currency>
C: <fee:fee>5.00</fee:fee>
C: </fee:transfer>
C: </extension>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C: </epp>
Example <transfer> response:
S: <?xml version="1.0" encoding="utf-8" standalone="no"?>
S: <epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1001">
S: <msg>Command completed successfully; action pending</msg>
S: </result>
S: <resData>
S: <domain:trnData
S: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
S: <domain:name>example.com</domain:name>
S: <domain:trStatus>pending</domain:trStatus>
S: <domain:reID>ClientX</domain:reID>
S: <domain:reDate>2019-06-08T22:00:00.0Z</domain:reDate>
S: <domain:acID>ClientY</domain:acID>
S: <domain:acDate>2019-06-13T22:00:00.0Z</domain:acDate>
S: <domain:exDate>2021-09-08T22:00:00.0Z</domain:exDate>
S: </domain:trnData>
S: </resData>
S: <extension>
S: <fee:trnData xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
S: <fee:currency>USD</fee:currency>
S: <fee:fee
S: refundable="1"
S: grace-period="P5D">5.00</fee:fee>
S: </fee:trnData>
S: </extension>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54322-XYZ</svTRID>
S: </trID>
S: </response>
S: </epp>
5.2.5. EPP <update> Command
This extension adds elements to both the EPP <update> command and
response when the extension is included in the <login> command
service extensions.
When submitting an <update> command to the server, the client MAY
include in the <extension> element a <fee:update> element, which
includes the following child elements:
* An OPTIONAL <fee:currency> element (as described in Section 3.2).
* One or more <fee:fee> elements (as described in Section 3.4).
When the <update> command has been processed successfully and the
client included the extension in the <login> command service
extensions, the server MAY include in the <extension> section of the
EPP response a <fee:updData> element, which contains the following
child elements:
* A <fee:currency> element (as described in Section 3.2).
* Zero or more <fee:fee> elements (as described in Section 3.4).
* Zero or more <fee:credit> elements (as described in Section 3.4).
* An OPTIONAL <fee:balance> element (as described in Section 3.5).
* An OPTIONAL <fee:creditLimit> element (as described in
Section 3.6).
Example <update> command:
C: <?xml version="1.0" encoding="utf-8" standalone="no"?>
C: <epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <update>
C: <domain:update
C: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
C: <domain:name>example.com</domain:name>
C: <domain:chg>
C: <domain:registrant>sh8013</domain:registrant>
C: </domain:chg>
C: </domain:update>
C: </update>
C: <extension>
C: <fee:update xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
C: <fee:currency>USD</fee:currency>
C: <fee:fee>5.00</fee:fee>
C: </fee:update>
C: </extension>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C: </epp>
Example <update> response:
S: <?xml version="1.0" encoding="utf-8" standalone="no"?>
S: <epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <extension>
S: <fee:updData xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
S: <fee:currency>USD</fee:currency>
S: <fee:fee>5.00</fee:fee>
S: </fee:updData>
S: </extension>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </trID>
S: </response>
S: </epp>
6. Formal Syntax
One schema is presented here -- the EPP Fee Extension schema.
The formal syntax presented here is a complete schema representation
of the object mapping suitable for automated validation of EPP XML
instances.
6.1. Fee Extension Schema
The formal syntax presented here is a complete schema representation
[W3C.REC-xmlschema-1-20041028] of the object mapping suitable for
automated validation of EPP XML instances. The <CODE BEGINS> and
<CODE ENDS> tags are not part of the schema; they are used to note
the beginning and end of the schema for URI registration purposes.
<CODE BEGINS>
<?xml version="1.0" encoding="utf-8"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema"
xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0"
xmlns:eppcom="urn:ietf:params:xml:ns:eppcom-1.0"
xmlns:domain="urn:ietf:params:xml:ns:domain-1.0"
targetNamespace="urn:ietf:params:xml:ns:epp:fee-1.0"
elementFormDefault="qualified">
<import namespace="urn:ietf:params:xml:ns:eppcom-1.0" />
<import namespace="urn:ietf:params:xml:ns:domain-1.0" />
<annotation>
<documentation>
Extensible Provisioning Protocol v1.0 Fee Extension
</documentation>
</annotation>
<!-- Child elements found in EPP commands and responses -->
<element name="check" type="fee:checkType" />
<element name="chkData" type="fee:chkDataType" />
<element name="create" type="fee:transformCommandType" />
<element name="creData" type="fee:transformResultType" />
<element name="renew" type="fee:transformCommandType" />
<element name="renData" type="fee:transformResultType" />
<element name="transfer" type="fee:transformCommandType" />
<element name="trnData" type="fee:transformResultType" />
<element name="update" type="fee:transformCommandType" />
<element name="updData" type="fee:transformResultType" />
<element name="delData" type="fee:transformResultType" />
<!-- client <check> command -->
<complexType name="checkType">
<sequence>
<element name="currency" type="fee:currencyType"
minOccurs="0" />
<element name="command" type="fee:commandType"
minOccurs="1" maxOccurs="unbounded" />
</sequence>
</complexType>
<complexType name="objectIdentifierType">
<simpleContent>
<extension base="eppcom:labelType">
<attribute name="element"
type="NMTOKEN" default="name" />
</extension>
</simpleContent>
</complexType>
<!-- server <check> result -->
<complexType name="chkDataType">
<sequence>
<element name="currency" type="fee:currencyType" />
<element name="cd" type="fee:objectCDType"
maxOccurs="unbounded" />
</sequence>
</complexType>
<complexType name="objectCDType">
<sequence>
<element name="objID" type="fee:objectIdentifierType" />
<element name="class" type="token" minOccurs="0" />
<element name="command" type="fee:commandDataType"
minOccurs="0" maxOccurs="unbounded" />
<element name="reason" type="fee:reasonType" minOccurs="0" />
</sequence>
<attribute name="avail" type="boolean" default="1" />
</complexType>
<!-- general transform (create, renew, update, transfer) command-->
<complexType name="transformCommandType">
<sequence>
<element name="currency" type="fee:currencyType"
minOccurs="0" />
<element name="fee" type="fee:feeType"
maxOccurs="unbounded" />
<element name="credit" type="fee:creditType"
minOccurs="0" maxOccurs="unbounded" />
</sequence>
</complexType>
<!-- general transform (create, renew, update) result -->
<complexType name="transformResultType">
<sequence>
<element name="currency" type="fee:currencyType"
minOccurs="0" />
<element name="period" type="domain:periodType"
minOccurs="0" />
<element name="fee" type="fee:feeType"
minOccurs="0" maxOccurs="unbounded" />
<element name="credit" type="fee:creditType"
minOccurs="0" maxOccurs="unbounded" />
<element name="balance" type="fee:balanceType"
minOccurs="0" />
<element name="creditLimit" type="fee:creditLimitType"
minOccurs="0" />
</sequence>
</complexType>
<!-- common types -->
<simpleType name="currencyType">
<restriction base="string">
<pattern value="[A-Z]{3}" />
</restriction>
</simpleType>
<complexType name="commandType">
<sequence>
<element name="period" type="domain:periodType"
minOccurs="0" maxOccurs="1" />
</sequence>
<attribute name="name" type="fee:commandEnum" use="required"/>
<attribute name="customName" type="token"/>
<attribute name="phase" type="token" />
<attribute name="subphase" type="token" />
</complexType>
<complexType name="commandDataType">
<complexContent>
<extension base="fee:commandType">
<sequence>
<element name="fee" type="fee:feeType"
minOccurs="0" maxOccurs="unbounded" />
<element name="credit" type="fee:creditType"
minOccurs="0" maxOccurs="unbounded" />
<element name="reason" type="fee:reasonType"
minOccurs="0" />
</sequence>
<attribute name="standard" type="boolean" default="0" />
</extension>
</complexContent>
</complexType>
<complexType name="reasonType">
<simpleContent>
<extension base="token">
<attribute name="lang" type="language" default="en"/>
</extension>
</simpleContent>
</complexType>
<simpleType name="commandEnum">
<restriction base="token">
<enumeration value="create"/>
<enumeration value="delete"/>
<enumeration value="renew"/>
<enumeration value="update"/>
<enumeration value="transfer"/>
<enumeration value="restore"/>
<enumeration value="custom"/>
</restriction>
</simpleType>
<simpleType name="nonNegativeDecimal">
<restriction base="decimal">
<minInclusive value="0" />
</restriction>
</simpleType>
<simpleType name="negativeDecimal">
<restriction base="decimal">
<maxInclusive value="0" />
</restriction>
</simpleType>
<complexType name="feeType">
<simpleContent>
<extension base="fee:nonNegativeDecimal">
<attribute name="description"/>
<attribute name="lang" type="language" default="en"/>
<attribute name="refundable" type="boolean" />
<attribute name="grace-period" type="duration" />
<attribute name="applied">
<simpleType>
<restriction base="token">
<enumeration value="immediate" />
<enumeration value="delayed" />
</restriction>
</simpleType>
</attribute>
</extension>
</simpleContent>
</complexType>
<complexType name="creditType">
<simpleContent>
<extension base="fee:negativeDecimal">
<attribute name="description"/>
<attribute name="lang" type="language" default="en"/>
</extension>
</simpleContent>
</complexType>
<simpleType name="balanceType">
<restriction base="decimal" />
</simpleType>
<simpleType name="creditLimitType">
<restriction base="decimal" />
</simpleType>
</schema>
<CODE ENDS>
7. Security Considerations
The mapping extensions described in this document do not provide any
security services beyond those described by the EPP [RFC5730], the
EPP domain name mapping [RFC5731], and the protocol layers used by
the EPP. The security considerations described in these other
specifications apply to this specification as well. This extension
passes financial information using the EPP protocol, so
confidentiality and integrity protection must be provided by the
transport mechanism. All transports compliant with [RFC5730] provide
the needed level of confidentiality and integrity protections. The
server will only provide information, including financial
information, that is relevant to the authenticated client.
8. IANA Considerations
8.1. XML Namespace
This document uses URNs to describe XML namespaces and XML schemas
conforming to a registry mechanism described in [RFC3688].
Registration request for the fee namespace:
URI: urn:ietf:params:xml:ns:epp:fee-1.0
Registrant Contact: IESG
XML: None. Namespace URIs do not represent an XML specification.
Registration request for the fee schema:
URI: urn:ietf:params:xml:schema:epp:fee-1.0
Registrant Contact: IESG
XML: See Section 6 of this document.
8.2. EPP Extension Registry
The EPP extension described in this document has been registered by
IANA in the "Extensions for the Extensible Provisioning Protocol
(EPP)" registry described in [RFC7451]. The details of the
registration are as follows:
Name of Extension: Registry Fee Extension for the Extensible
Provisioning Protocol (EPP)
Document status: Standards Track
Reference: RFC 8748
Registrant Name and Email Address: IESG <iesg@ietf.org>
TLDs: Any
IPR Disclosure: None
Status: Active
Notes: None
9. References
9.1. Normative References
[ISO4217_2015]
ISO, "Codes for the representation of currencies",
ISO 4217:2015, August 2015,
<https://www.iso.org/standard/64758.html>.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/info/rfc2119>.
[RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
DOI 10.17487/RFC3688, January 2004,
<https://www.rfc-editor.org/info/rfc3688>.
[RFC3915] Hollenbeck, S., "Domain Registry Grace Period Mapping for
the Extensible Provisioning Protocol (EPP)", RFC 3915,
DOI 10.17487/RFC3915, September 2004,
<https://www.rfc-editor.org/info/rfc3915>.
[RFC5646] Phillips, A., Ed. and M. Davis, Ed., "Tags for Identifying
Languages", BCP 47, RFC 5646, DOI 10.17487/RFC5646,
September 2009, <https://www.rfc-editor.org/info/rfc5646>.
[RFC5730] Hollenbeck, S., "Extensible Provisioning Protocol (EPP)",
STD 69, RFC 5730, DOI 10.17487/RFC5730, August 2009,
<https://www.rfc-editor.org/info/rfc5730>.
[RFC5731] Hollenbeck, S., "Extensible Provisioning Protocol (EPP)
Domain Name Mapping", STD 69, RFC 5731,
DOI 10.17487/RFC5731, August 2009,
<https://www.rfc-editor.org/info/rfc5731>.
[RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
May 2017, <https://www.rfc-editor.org/info/rfc8174>.
[RFC8334] Gould, J., Tan, W., and G. Brown, "Launch Phase Mapping
for the Extensible Provisioning Protocol (EPP)", RFC 8334,
DOI 10.17487/RFC8334, March 2018,
<https://www.rfc-editor.org/info/rfc8334>.
[W3C.REC-xmlschema-1-20041028]
Thompson, H., Beech, D., Maloney, M., and N. Mendelsohn,
"XML Schema Part 1: Structures Second Edition", World Wide
Web Consortium Recommendation REC-xmlschema-1-20041028,
October 2004,
<http://www.w3.org/TR/2004/REC-xmlschema-1-20041028>.
9.2. Informative References
[RFC7451] Hollenbeck, S., "Extension Registry for the Extensible
Provisioning Protocol", RFC 7451, DOI 10.17487/RFC7451,
February 2015, <https://www.rfc-editor.org/info/rfc7451>.
Acknowledgements
The authors wish to thank the following persons for their feedback
and suggestions:
* James Gould of Verisign Inc.
* Luis Munoz of ISC
* Michael Young
* Ben Levac
* Jeff Eckhaus
* Seth Goldman of Google
* Klaus Malorny and Michael Bauland of Knipp
* Jody Kolker, Joe Snitker, and Kevin Allendorf of GoDaddy
* Michael Holloway of Com Laude
* Santosh Kalsangrah of Impetus Infotech
* Alex Mayrhofer of Nic.at
* Thomas Corte of Knipp Medien und Kommunikation GmbH
Authors' Addresses
Roger Carney
GoDaddy Inc.
14455 N. Hayden Rd. #219
Scottsdale, AZ 85260
United States of America
Email: rcarney@godaddy.com
URI: http://www.godaddy.com
Gavin Brown
CentralNic Group plc
35-39 Moorgate
London
EC2R 6AR
United Kingdom
Phone: +44 20 33 88 0600
Email: gavin.brown@centralnic.com
URI: http://www.centralnic.com
Jothan Frakes
Email: jothan@jothan.com
URI: http://jothan.com