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Internet Engineering Task Force (IETF) T. Sattler
Request for Comments: 9167
Category: Standards Track R. Carney
ISSN: 2070-1721 J. Kolker
GoDaddy Inc.
December 2021
Registry Maintenance Notification for the Extensible Provisioning
Protocol (EPP)
Abstract
This document describes an Extensible Provisioning Protocol (EPP)
extension called "Registry Maintenance Notification", which is used
by EPP servers to notify EPP clients and allow EPP clients to query
EPP servers regarding maintenance events.
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/rfc9167.
Copyright Notice
Copyright (c) 2021 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 Revised BSD License text as described in Section 4.e of the
Trust Legal Provisions and are provided without warranty as described
in the Revised BSD License.
Table of Contents
1. Introduction
1.1. Terminology and Definitions
2. Migrating to Newer Versions of This Extension
3. Object Attributes
3.1. Internationalized Domain Names
3.2. Dates and Times
3.3. Maintenance Elements
4. EPP Command Mapping
4.1. EPP Query Commands
4.1.1. EPP <info> Command
4.1.2. EPP <poll> Command
4.2. EPP Transform Commands
5. Formal Syntax
5.1. Registry Maintenance Notification EPP Mapping Schema
6. IANA Considerations
6.1. XML Namespace
6.2. EPP Extension Registry
7. Security Considerations
8. References
8.1. Normative References
8.2. Informative References
Acknowledgments
Authors' Addresses
1. Introduction
The Extensible Provisioning Protocol (EPP), as defined in [RFC5730],
is a protocol whose original motivation is to provide a standard
Internet domain name registration protocol for use between registries
and registrars.
Registries routinely update systems to ensure a higher quality of
service, implement new services, or upgrade protocols to the latest
standards. These updates are pushed to various registry environments
during time frames communicated to registrars as "maintenance
events". Maintenance events may require making services unavailable
for some limited time while the upgrade happens. Registries usually
inform registrars about maintenance events in various formats, none
of which are standardized between registries.
The DNS namespace expansion has led to many additional registries
that registrars must interact with, adding more maintenance events
and formats. It is now desirable to provide an efficient approach to
notify registrars.
This document describes an extension mapping for version 1.0 of the
EPP to provide a mechanism by which EPP servers may notify EPP
clients of and allow EPP clients to query EPP servers on upcoming
maintenance events.
1.1. Terminology and Definitions
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 [W3C.REC-xml-20081126] is case sensitive. Unless stated
otherwise, XML specifications and examples provided in this document
MUST be interpreted in the character case presented in order to
develop a conforming implementation.
The XML namespace prefix "maint" is used for the namespace
"urn:ietf:params:xml:ns:epp:maintenance-1.0", 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.
"ote" is an abbreviation for "Operational Test and Evaluation".
In examples, "C:" represents lines sent by a protocol client, and
"S:" represents lines returned by a protocol server. Indentation and
white space in 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. A newer version of the
extension is expected to use an XML namespace with a higher version
number than the prior versions.
Servers SHOULD (for a temporary migration period up to server policy)
provide support for older versions of the extension in parallel to
the newest version and allow clients to execute their preferred
version of the <info> command based on the maintenance <objURI>
elements of the server <greeting>. The version of the maintenance
<info> response MUST match the version of the maintenance <info>
command executed by the server.
Servers MUST return a Registry Maintenance Notification poll message
matching the newest negotiated version of the maintenance extension,
based on an intersection of the maintenance <objURI> elements in the
server <greeting> and the client <login> command. If the
intersection of the maintenance <objURI> elements of the server
<greeting> and the client <login> command results in an empty set,
the server MUST return the newest version of the Registry Maintenance
Notification poll message supported by the server based on "Usage
with Poll-Message EPP Responses" in Section 6 of [RFC9038].
3. Object Attributes
3.1. Internationalized Domain Names
Names of affected hosts MUST be provided in A-label form, according
to [RFC5891].
3.2. Dates and Times
All date and time attribute values MUST be expressed in Universal
Coordinated Time (UTC) using the Gregorian calendar. The date-time
format defined as "date-time" in [RFC3339], with time-offset="Z",
MUST be used.
3.3. Maintenance Elements
The <maint:item> element describes a single registry maintenance
event during a specific period. This element is used in a
maintenance item EPP <info> command and response as well as in a
<poll> response.
If an element is not marked as optional, it is mandatory.
<maint:id>
The server-unique identifier for the maintenance event with the
OPTIONAL "name" attribute that includes a human-readable name of
the event. The server-unique identifier SHALL NOT be changed if
the event is updated or deleted. When the "name" attribute is
set, the OPTIONAL "lang" attribute, per the language structure in
[RFC5646], MAY be present to identify the language if the
negotiated value is something other than the default value of "en"
(English).
<maint:type>
Zero or more OPTIONAL types of the maintenance event, with the
possible set of values defined by server policy, such as "Routine
Maintenance", "Software Update", "Software Upgrade", or "Extended
Outage". The OPTIONAL "lang" attribute MAY be present to identify
the language if the negotiated value is something other than the
default value of "en" (English).
<maint:pollType>
The OPTIONAL <maint:pollType> element for a Registry Maintenance
Notification poll message; values MUST be "create", "update",
"delete", "courtesy", or "end". For the "create" and "update"
types, the server includes the state of the maintenance event
after the creation or update. For the "delete" type, the server
includes the state of the event before the delete. The "courtesy"
provides a reminder of an event, and the "end" provides a
notification of the end of the event without updating the
maintenance object and includes the latest state of the event.
This element MUST be present only for poll messages.
<maint:systems>
One or more <maint:system> elements that are affected by the
maintenance event.
<maint:system>
The <maint:system> element contains the following child
elements:
<maint:name>
The name of the affected system, such as "EPP", "WHOIS",
"DNS", "Portal", "RDAP", etc.
<maint:host>
The OPTIONAL affected maintained system's hostname, which
SHALL be in A-label form, according to [RFC5891].
<maint:impact>
The impact level; the values MUST be "full", "partial", or
"none". If access is expected to be intermittently
unavailable, it is "partial". If access is expected to be
completely unavailable, it is "full". If access is not
affected, it is "none".
<maint:environment>
The type of the affected system; the attribute "type" is REQUIRED
and MUST be "production", "ote", "staging", "dev", or "custom".
For extensibility, the <maint:environment> element includes the
OPTIONAL "name" attribute that can define the name of the custom
environment when the <maint:environment> element "type" attribute
has the "custom" value. For example, for the custom "marketing"
environment, the <maint:environment> element should be:
<maint:environment type="custom" name="marketing"/>.
<maint:start>
The date and time of the start of the maintenance event.
<maint:end>
The date and time of the end of the maintenance event. The
<maint:end> element MUST be greater than the <maint:start>
element.
<maint:reason>
The reason behind the maintenance event; the values MUST be either
"planned" or "emergency".
<maint:detail>
The OPTIONAL URI to the detailed maintenance event description,
formatted according to [RFC3986].
<maint:description>
Zero or more OPTIONAL free-form descriptions of the maintenance
event, usable without creating and traversing an external resource
as defined by the <maint:detail> element. The OPTIONAL "lang"
attribute MAY be present to identify the language if the
negotiated value is something other than the default value of "en"
(English). The OPTIONAL "type" attribute MAY be present to
identify the format of the description. It MUST be either "plain"
for plain text or "html" for HTML text, as defined in [HTML5], and
XML-escaped, with a default value of "plain".
<maint:tlds>
The OPTIONAL <maint:tlds> element contains one or more <maint:tld>
child elements. If the <maint:tlds> is not present, the entire
system is affected.
<maint:tld>
The affected top-level domain or registry zone, which SHALL be
in A-label form, according to [RFC5891].
<maint:intervention>
The OPTIONAL <maint:intervention> element contains the
following child elements:
<maint:connection>
The value SHALL be boolean and indicates if a client needs
to perform a connection-related action such as a reconnect.
The attribute should only be used as a flag to indicate
connections will be affected. Servers SHOULD include a
description of how the connections are affected in the
<maint:description> element or use the <maint:detail>
element above.
<maint:implementation>
The value SHALL be boolean and indicates if a client needs
to perform an implementation-related action such as a code
change. The attribute should only be used as a flag to
indicate implementation will be affected. Servers SHOULD
include a description of how the implementation is affected
in the <maint:description> element or use the <maint:detail>
element above.
<maint:crDate>
The date and time of the maintenance object creation.
<maint:upDate>
The OPTIONAL date and time of the most recent maintenance
object modification. This element MUST NOT be present if the
maintenance object has never been modified.
4. EPP Command Mapping
A detailed description of the EPP syntax and semantics can be found
in the EPP core protocol specification [RFC5730]. The command
mappings described here are specifically used to notify registrars of
registry maintenance events and object mapping.
4.1. EPP Query Commands
EPP [RFC5730] provides three commands to retrieve object information:
<check> to determine if an object is known to the server, <info> to
retrieve detailed information associated with an object, and
<transfer> to retrieve object transfer status information.
This extension does not add any elements to EPP <check> and
<transfer> commands or responses.
4.1.1. EPP <info> Command
EPP provides the <info> command that is used to retrieve registry
maintenance information. In addition to the standard EPP command
elements, the <info> command MUST contain a <maint:info> element that
identifies the maintenance namespace.
The <maint:info> element MUST contain a child element. It is either
the <maint:id> child element, described in Section 4.1.1.1, to query
for a specific maintenance item or the <maint:list> child element,
described in Section 4.1.1.2, to query all maintenance items.
4.1.1.1. Info Maintenance Item
The information regarding a specific maintenance item can be
retrieved by using the <info> command with the <maint:info> element
and the <maint:id> child element, defined in Section 3.3. If the
maintenance identifier does not exist, the server MUST return an EPP
error result code of 2303 ("Object does not exist") [RFC5730].
The following is an example of retrieving a specific maintenance item
in an <info> 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: <info>
C: <maint:info
C: xmlns:maint="urn:ietf:params:xml:ns:epp:maintenance-1.0">
C: <maint:id>2e6df9b0-4092-4491-bcc8-9fb2166dcee6</maint:id>
C: </maint:info>
C: </info>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
When an <info> command has been processed successfully, the EPP
<resData> element MUST contain a child <maint:infData> element that
identifies the maintenance namespace. The <maint:infData> element
contains the <maint:item> element defined in Section 3.3.
The following is an example of returning a specific maintenance item
in an <info> response.
S:<?xml version="1.0" encoding="UTF-8"?>
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: <maint:infData
S: xmlns:maint="urn:ietf:params:xml:ns:epp:maintenance-1.0">
S: <maint:item>
S: <maint:id>2e6df9b0-4092-4491-bcc8-9fb2166dcee6
S: </maint:id>
S: <maint:type lang="en">Routine Maintenance</maint:type>
S: <maint:systems>
S: <maint:system>
S: <maint:name>EPP</maint:name>
S: <maint:host>epp.registry.example
S: </maint:host>
S: <maint:impact>full</maint:impact>
S: </maint:system>
S: </maint:systems>
S: <maint:environment type="production"/>
S: <maint:start>2021-12-30T06:00:00Z</maint:start>
S: <maint:end>2021-12-30T07:00:00Z</maint:end>
S: <maint:reason>planned</maint:reason>
S: <maint:detail>
S: https://www.registry.example/notice?123
S: </maint:detail>
S: <maint:description lang="en">free-text
S: </maint:description>
S: <maint:description lang="de">Freitext
S: </maint:description>
S: <maint:tlds>
S: <maint:tld>example</maint:tld>
S: <maint:tld>test</maint:tld>
S: </maint:tlds>
S: <maint:intervention>
S: <maint:connection>false</maint:connection>
S: <maint:implementation>false</maint:implementation>
S: </maint:intervention>
S: <maint:crDate>2021-11-08T22:10:00Z</maint:crDate>
S: </maint:item>
S: </maint:infData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
4.1.1.2. Info Maintenance List
The information for a list of maintenance items can be retrieved by
using the <info> command with the <maint:info> element and the empty
<maint:list> child element. Server policy determines if completed
maintenance events will be included in the list of maintenance items.
The following is an example of retrieving the list of maintenance
items in an <info> 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: <info>
C: <maint:info
C: xmlns:maint="urn:ietf:params:xml:ns:epp:maintenance-1.0">
C: <maint:list/>
C: </maint:info>
C: </info>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
When an <info> command has been processed successfully, the EPP
<resData> element MUST contain a child <maint:infData> element that
identifies the maintenance namespace. The <maint:infData> element
contains the <maint:list> element with zero or more <maint:listItem>
child elements. The <maint:listItem> element contains the following
child elements:
<maint:id>
The <maint:id> element defined in Section 3.3.
<maint:start>
The <maint:start> element defined in Section 3.3.
<maint:end>
The <maint:end> element defined in Section 3.3.
<maint:crDate>
The <maint:crDate> element defined in Section 3.3.
<maint:upDate>
The OPTIONAL <maint:upDate> element defined in Section 3.3.
The following is an example of returning the list of maintenance
items in an <info> response.
S:<?xml version="1.0" encoding="UTF-8"?>
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: <maint:infData
S: xmlns:maint="urn:ietf:params:xml:ns:epp:maintenance-1.0">
S: <maint:list>
S: <maint:listItem>
S: <maint:id>2e6df9b0-4092-4491-bcc8-9fb2166dcee6
S: </maint:id>
S: <maint:start>2021-12-30T06:00:00Z</maint:start>
S: <maint:end>2021-12-30T07:00:00Z</maint:end>
S: <maint:crDate>2021-11-08T22:10:00Z</maint:crDate>
S: </maint:listItem>
S: <maint:listItem>
S: <maint:id>91e9dabf-c4e9-4c19-a56c-78e3e89c2e2f
S: </maint:id>
S: <maint:start>2021-12-15T04:30:00Z</maint:start>
S: <maint:end>2021-12-15T05:30:00Z</maint:end>
S: <maint:crDate>2021-11-08T22:11:00Z</maint:crDate>
S: <maint:upDate>2021-11-17T15:00:00Z</maint:upDate>
S: </maint:listItem>
S: </maint:list>
S: </maint:infData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
4.1.2. EPP <poll> Command
The EPP <poll> command and response are defined in Section 2.9.2.3 of
[RFC5730]. The Registry Maintenance Notification is included in the
EPP <poll> response in [RFC5730].
There are five types of poll messages for the Registry Maintenance
Notification, defined by the <maint:pollType> element in Section 3.3.
A poll message might be generated when a maintenance event is
created, updated, or deleted. A courtesy poll message can be sent as
a reminder of an upcoming maintenance event. An end poll message can
be sent when the maintenance event is completed. In the case of a
message specific to Registry Maintenance, a <maint:infData> element
that identifies the maintenance namespace will be included within the
<resData> element of the standard <poll> response. The
<maint:infData> element contains the <maint:item> element defined in
Section 3.3.
The following is an example of a <poll> 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: <poll op="req"/>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
Example <poll> 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="1301">
S: <msg>Command completed successfully; ack to dequeue</msg>
S: </result>
S: <msgQ count="1" id="12345">
S: <qDate>2021-11-08T22:10:00Z</qDate>
S: <msg lang="en">Registry Maintenance Notification</msg>
S: </msgQ>
S: <resData>
S: <maint:infData
S: xmlns:maint="urn:ietf:params:xml:ns:epp:maintenance-1.0">
S: <maint:item>
S: <maint:id>2e6df9b0-4092-4491-bcc8-9fb2166dcee6</maint:id>
S: <maint:pollType>create</maint:pollType>
S: <maint:systems>
S: <maint:system>
S: <maint:name>EPP</maint:name>
S: <maint:host>epp.registry.example
S: </maint:host>
S: <maint:impact>full</maint:impact>
S: </maint:system>
S: </maint:systems>
S: <maint:environment type="production"/>
S: <maint:start>2021-12-30T06:00:00Z</maint:start>
S: <maint:end>2021-12-30T07:00:00Z</maint:end>
S: <maint:reason>planned</maint:reason>
S: <maint:detail>
S: https://www.registry.example/notice?123
S: </maint:detail>
S: <maint:tlds>
S: <maint:tld>example</maint:tld>
S: <maint:tld>test</maint:tld>
S: </maint:tlds>
S: <maint:intervention>
S: <maint:connection>false</maint:connection>
S: <maint:implementation>false</maint:implementation>
S: </maint:intervention>
S: <maint:crDate>2021-11-08T22:10:00Z</maint:crDate>
S: </maint:item>
S: </maint:infData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
4.2. EPP Transform Commands
EPP provides five commands to transform objects: <create> to create
an instance of an object, <delete> to delete an instance of an
object, <renew> to extend the validity period of an object,
<transfer> to manage object sponsorship changes, and <update> to
change information associated with an object.
This extension does not add any elements to the EPP <create>,
<delete>, <renew>, <transfer>, and <update> commands.
5. Formal Syntax
The EPP Registry Maintenance Notification schema is presented here.
The formal syntax is a complete schema representation 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.
5.1. Registry Maintenance Notification EPP Mapping Schema
<CODE BEGINS>
<?xml version="1.0" encoding="UTF-8"?>
<schema targetNamespace="urn:ietf:params:xml:ns:epp:
maintenance-1.0"
xmlns:eppcom="urn:ietf:params:xml:ns:eppcom-1.0"
xmlns:epp="urn:ietf:params:xml:ns:epp-1.0"
xmlns:maint="urn:ietf:params:xml:ns:epp:maintenance-1.0"
xmlns="https://www.w3.org/2001/XMLSchema"
elementFormDefault="qualified">
<!--
Import common element types
-->
<import namespace="urn:ietf:params:xml:ns:eppcom-1.0"/>
<import namespace="urn:ietf:params:xml:ns:epp-1.0"/>
<annotation>
<documentation>
Extensible Provisioning Protocol v1.0
Registry Maintenance Notification Mapping Schema.
</documentation>
</annotation>
<!--
Child elements found in EPP commands.
-->
<element name="info" type="maint:infoType"/>
<!--
Child elements of the <info> command.
-->
<complexType name="infoType">
<sequence>
<choice>
<element name="list"/>
<element name="id" type="maint:idType"/>
</choice>
</sequence>
</complexType>
<!--
Human-readable text may describe the maintenance
-->
<complexType name="idType">
<simpleContent>
<extension base="token">
<attribute name="name" type="token"/>
<attribute name="lang" type="language" default="en"/>
</extension>
</simpleContent>
</complexType>
<!--
Info Response element
-->
<element name="infData" type="maint:infDataType"/>
<!--
<info> response elements.
-->
<complexType name="infDataType">
<choice>
<element name="list" type="maint:listDataType"/>
<element name="item" type="maint:maintDataType"/>
</choice>
</complexType>
<!--
Attributes associated with the list info response
-->
<complexType name="listDataType">
<sequence>
<element name="listItem" type="maint:maintItemType"
minOccurs="0" maxOccurs="unbounded"/>
</sequence>
</complexType>
<!--
Attributes associated with the list item info response
-->
<complexType name="maintItemType">
<sequence>
<element name="id" type="maint:idType"/>
<element name="start" type="dateTime"/>
<element name="end" type="dateTime"/>
<element name="crDate" type="dateTime"/>
<element name="upDate" type="dateTime" minOccurs="0"/>
</sequence>
</complexType>
<!--
Attributes associated with the maintenance info response
-->
<complexType name="maintDataType">
<sequence>
<element name="id" type="maint:idType"/>
<element name="type" type="maint:typeType" minOccurs="0"
maxOccurs="unbounded"/>
<element name="pollType" type="maint:pollType" minOccurs="0"/>
<element name="systems" type="maint:systemsType"/>
<element name="environment" type="maint:envType"/>
<element name="start" type="dateTime"/>
<element name="end" type="dateTime"/>
<element name="reason" type="maint:reasonEnum"/>
<element name="detail" type="anyURI" minOccurs="0"/>
<element name="description" type="maint:descriptionType"
minOccurs="0" maxOccurs="unbounded"/>
<element name="tlds" type="maint:tldsType" minOccurs="0"/>
<element name="intervention" type="maint:interventionType"
minOccurs="0"/>
<element name="crDate" type="dateTime"/>
<element name="upDate" type="dateTime" minOccurs="0"/>
</sequence>
</complexType>
<!--
systems element
-->
<complexType name="systemsType">
<sequence>
<element name="system" type="maint:systemType"
maxOccurs="unbounded"/>
</sequence>
</complexType>
<!--
Enumerated list of poll types
-->
<simpleType name="pollType">
<restriction base="token">
<enumeration value="create"/>
<enumeration value="update"/>
<enumeration value="delete"/>
<enumeration value="courtesy"/>
<enumeration value="end"/>
</restriction>
</simpleType>
<!--
Enumerated list of impacts
-->
<simpleType name="impactEnum">
<restriction base="token">
<enumeration value="none"/>
<enumeration value="partial"/>
<enumeration value="full"/>
</restriction>
</simpleType>
<!--
description element
-->
<complexType name="descriptionType">
<simpleContent>
<extension base="string">
<attribute name="lang" type="language" default="en"/>
<attribute name="type" type="maint:descEnum" default="plain"
/>
</extension>
</simpleContent>
</complexType>
<!--
Enumerated list of description mime types
-->
<simpleType name="descEnum">
<restriction base="token">
<enumeration value="plain"/>
<enumeration value="html"/>
</restriction>
</simpleType>
<!--
type element
-->
<complexType name="typeType">
<simpleContent>
<extension base="string">
<attribute name="lang" type="language" default="en"/>
</extension>
</simpleContent>
</complexType>
<!--
system element
-->
<complexType name="systemType">
<sequence>
<element name="name" type="token"/>
<element name="host" type="eppcom:labelType" minOccurs="0"/>
<element name="impact" type="maint:impactEnum"/>
</sequence>
</complexType>
<!--
Enumerated list of environments
-->
<simpleType name="envEnum">
<restriction base="token">
<enumeration value="production"/>
<enumeration value="ote"/>
<enumeration value="staging"/>
<enumeration value="dev"/>
<enumeration value="custom"/>
</restriction>
</simpleType>
<!--
environment element
-->
<complexType name="envType">
<simpleContent>
<extension base="token">
<attribute name="type" type="maint:envEnum" use="required"/>
<attribute name="name" type="token" use="optional"/>
</extension>
</simpleContent>
</complexType>
<!--
Enumerated list of reasons
-->
<simpleType name="reasonEnum">
<restriction base="token">
<enumeration value="planned"/>
<enumeration value="emergency"/>
</restriction>
</simpleType>
<!--
tlds element
-->
<complexType name="tldsType">
<sequence>
<element name="tld" type="eppcom:labelType"
maxOccurs="unbounded"/>
</sequence>
</complexType>
<!--
intervention element
-->
<complexType name="interventionType">
<sequence>
<element name="connection" type="boolean"/>
<element name="implementation" type="boolean"/>
</sequence>
</complexType>
<!--
End of schema.
-->
</schema>
<CODE ENDS>
6. IANA Considerations
6.1. XML Namespace
This document uses URNs to describe XML namespaces and XML schemas
conforming to a registry mechanism defined in [RFC3688].
The following entry has been registered as an XML namespace:
URI: urn:ietf:params:xml:ns:epp:maintenance-1.0
Registrant Contact: IESG
XML: None. Namespace URIs do not represent an XML specification.
The following entry has been registered to the XML maintenance
schema:
URI: urn:ietf:params:xml:schema:epp:maintenance-1.0
Registrant Contact: IESG
XML: See the "Formal Syntax" section of this document.
6.2. EPP Extension Registry
The following entry has been added to the "Extensions for the
Extensible Provisioning Protocol (EPP)" registry, described in
[RFC7451]:
Name of Extension: Registry Maintenance Notification for the
Extensible Provisioning Protocol (EPP)
Document status: Standards Track
Reference: RFC 9167
Registrant Name and Email Address: IESG <iesg@ietf.org>
TLDs: Any
IPR Disclosure: None
Status: Active
Notes: None
7. Security Considerations
The security considerations of [RFC5730] apply in this document.
Additionally, a server MUST only provide maintenance information to
clients that are authorized. Suppose a client queries a maintenance
identifier that it is not authorized to access per Section 4.1.1.1,
"Info Maintenance Item". In that case, the server SHOULD return an
EPP error result code of 2201 ("Authorization error") or 2303
("Object does not exist") [RFC5730]. The list of top-level domains
or registry zones returned in the "Info Maintenance Item" response
SHOULD be filtered based on the top-level domains or registry zones
for which the client is authorized. Authorization of poll messages
is done at the time of poll message insertion and not at the time of
poll message consumption.
8. References
8.1. Normative References
[HTML5] WHATWG, "HTML - Living Standard", December 2021,
<https://html.spec.whatwg.org/multipage/>.
[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>.
[RFC3339] Klyne, G. and C. Newman, "Date and Time on the Internet:
Timestamps", RFC 3339, DOI 10.17487/RFC3339, July 2002,
<https://www.rfc-editor.org/info/rfc3339>.
[RFC3986] Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform
Resource Identifier (URI): Generic Syntax", STD 66,
RFC 3986, DOI 10.17487/RFC3986, January 2005,
<https://www.rfc-editor.org/info/rfc3986>.
[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>.
[RFC5891] Klensin, J., "Internationalized Domain Names in
Applications (IDNA): Protocol", RFC 5891,
DOI 10.17487/RFC5891, August 2010,
<https://www.rfc-editor.org/info/rfc5891>.
[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>.
[RFC9038] Gould, J. and M. Casanova, "Extensible Provisioning
Protocol (EPP) Unhandled Namespaces", RFC 9038,
DOI 10.17487/RFC9038, May 2021,
<https://www.rfc-editor.org/info/rfc9038>.
[W3C.REC-xml-20081126]
Bray, T., Paoli, J., Sperberg-McQueen, M., Maler, E., and
F. Yergeau, "Extensible Markup Language (XML) 1.0 (Fifth
Edition)", World Wide Web Consortium Recommendation REC-
xml-20081126, November 2008,
<https://www.w3.org/TR/2008/REC-xml-20081126>.
8.2. Informative References
[RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
DOI 10.17487/RFC3688, January 2004,
<https://www.rfc-editor.org/info/rfc3688>.
[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>.
Acknowledgments
The authors wish to thank the following persons for their feedback
and suggestions: James Gould, Michael Bauland, Patrick Mevzek, Quoc-
Anh Pham, Raymond Zylstra, Christopher Martens, Anthony Eden, Neal
McPherson, Craig Marchant, and Andreas Huber.
Authors' Addresses
Tobias Sattler
Email: mail@tobiassattler.com
URI: https://tobiassattler.com
Roger Carney
GoDaddy Inc.
2155 E GoDaddy Way
Tempe, AZ 85284
United States of America
Email: rcarney@godaddy.com
URI: https://www.godaddy.com
Jody Kolker
GoDaddy Inc.
2155 E GoDaddy Way
Tempe, AZ 85284
United States of America
Email: jkolker@godaddy.com
URI: https://www.godaddy.com