Network Working Group S. Hollenbeck
Request for Comments: 3731 VeriSign, Inc.
Category: Standards Track March 2004
Extensible Provisioning Protocol (EPP) Domain Name Mapping
Status of this Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2004). All Rights Reserved.
Abstract
This document describes an Extensible Provisioning Protocol (EPP)
mapping for the provisioning and management of Internet domain names
stored in a shared central repository. Specified in XML, the mapping
defines EPP command syntax and semantics as applied to domain names.
Table of Contents
1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Relationship of Domain Objects and Host Objects . . . . 2
1.2. Conventions Used In This Document . . . . . . . . . . . 4
2. Object Attributes . . . . . . . . . . . . . . . . . . . . . . 4
2.1. Domain and Host Names . . . . . . . . . . . . . . . . . 4
2.2. Contact and Client Identifiers. . . . . . . . . . . . . 5
2.3. Status Values . . . . . . . . . . . . . . . . . . . . . 5
2.4. Dates and Times . . . . . . . . . . . . . . . . . . . . 7
2.5. Validity Periods. . . . . . . . . . . . . . . . . . . . 7
2.6. Authorization Information . . . . . . . . . . . . . . . 7
2.7. Other DNS Resource Record Attributes. . . . . . . . . . 7
3. EPP Command Mapping . . . . . . . . . . . . . . . . . . . . . 8
3.1. EPP Query Commands. . . . . . . . . . . . . . . . . . . 8
3.1.1. EPP Command . . . . . . . . . . . . . . 8
3.1.2. EPP Command. . . . . . . . . . . . . . . 10
3.1.3. EPP Query Command. . . . . . . . . . 16
3.2. EPP Transform Commands. . . . . . . . . . . . . . . . . 18
3.2.1. EPP Command. . . . . . . . . . . . . . 19
3.2.2. EPP Command. . . . . . . . . . . . . . 21
3.2.3. EPP Command . . . . . . . . . . . . . . 23
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3.2.4. EPP Command. . . . . . . . . . . . . 24
3.2.5. EPP Command. . . . . . . . . . . . . . 27
3.2.6. Offline Review of Requested Actions . . . . . . 29
4. Formal Syntax . . . . . . . . . . . . . . . . . . . . . . . . 32
5. Internationalization Considerations . . . . . . . . . . . . . 41
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 42
7. Security Considerations . . . . . . . . . . . . . . . . . . . 42
8. Acknowledgements. . . . . . . . . . . . . . . . . . . . . . . 42
9. References. . . . . . . . . . . . . . . . . . . . . . . . . . 43
9.1. Normative References. . . . . . . . . . . . . . . . . . 43
9.2. Informative References. . . . . . . . . . . . . . . . . 43
10. Author's Address. . . . . . . . . . . . . . . . . . . . . . . 44
11. Full Copyright Statement. . . . . . . . . . . . . . . . . . . 45
1. Introduction
This document describes an Internet domain name mapping for version
1.0 of the Extensible Provisioning Protocol (EPP). This mapping is
specified using the Extensible Markup Language (XML) 1.0 as described
in [XML] and XML Schema notation as described in [XMLS-1] and
[XMLS-2].
[RFC3730] provides a complete description of EPP command and response
structures. A thorough understanding of the base protocol
specification is necessary to understand the mapping described in
this document.
XML is case sensitive. Unless stated otherwise, XML specifications
and examples provided in this document MUST be interpreted in the
character case presented to develop a conforming implementation.
1.1. Relationship of Domain Objects and Host Objects
The EPP mapping for host objects is described in [RFC3732]. This
document assumes that domain name objects have a superordinate
relationship to subordinate host name objects. For example, domain
name "example.com" has a superordinate relationship to host name
"ns1.example.com". EPP actions (such as object transfers) that do
not preserve this relationship MUST be explicitly disallowed.
A host name object can be created in a repository for which no
superordinate domain name object exists. For example, host name
"ns1.example.com" can be created in the ".example" repository so that
DNS domains in ".example" can be delegated to the host. Such hosts
are described as "external" hosts in this specification since the
name of the host does not belong to the name space of the repository
in which the host is being used for delegation purposes.
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Whether a host is external or internal relates to the repository in
which the host is being used for delegation purposes. Whether an
internal host is subordinate or not relates to a domain within the
repository. For example, host ns1.example1.com is a subordinate host
of domain example1.com, but it is a not a subordinate host of domain
example2.com. ns1.example1.com can be used as a name server for
example2.com. In this case, ns1.example1.com MUST be treated as an
internal host, subject to the rules governing operations on
subordinate hosts within the same repository.
Name server hosts for domain delegation can be specified as either
references to existing host objects or as domain attributes that
describe a host machine. A server operator MUST use one name server
specification form consistently. A server operator that announces
support for host objects in an EPP greeting MUST NOT allow domain
attributes to describe a name server host machine. A server operator
that does not announce support for host objects MUST allow domain
attributes to describe a name server host machine. When domain
attributes are used to describe a name server host machine, IP
addresses SHOULD be required only as needed to generate DNS glue
records.
Name servers are specified within a element. This
element MUST contain one or more elements or one or
more elements. A element contains
the fully qualified name of a known name server host object. A
element contains the following child elements:
- A element that contains the fully qualified name
of a host.
- Zero or more OPTIONAL elements that contain the
IP addresses to be associated with the host. Each element MAY
contain an "ip" attribute to identify the IP address format.
Attribute value "v4" is used to note IPv4 address format.
Attribute value "v6" is used to note IPv6 address format. If the
"ip" attribute is not specified, "v4" is the default attribute
value. IP address syntax requirements are described in Section
2.5 of the EPP host mapping [RFC3732].
Example host object name server elements for domain example.com:
ns1.example.com
ns1.example.net
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Example host attribute name server elements for domain example.com:
ns1.example.com
192.0.2.2
1080:0:0:0:8:800:200C:417A
ns1.example.net
1.2. Conventions Used In This Document
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [RFC2119].
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 is provided only to illustrate element
relationships and is not a REQUIRED feature of this protocol.
2. Object Attributes
An EPP domain object has attributes and associated values that can be
viewed and modified by the sponsoring client or the server. This
section describes each attribute type in detail. The formal syntax
for the attribute values described here can be found in the "Formal
Syntax" section of this document and in the appropriate normative
references.
2.1. Domain and Host Names
The syntax for domain and host names described in this document MUST
conform to [RFC952] as updated by [RFC1123]. At the time of this
writing, RFC 3490 [RFC3490] describes a standard to use certain ASCII
name labels to represent non-ASCII name labels. These conformance
requirements might change as a result of progressing work in
developing standards for internationalized domain names. A server
MAY restrict allowable domain names to a particular top level domain,
second level domain, or other domain for which the server is
authoritative. The trailing dot required when these names are stored
in a DNS zone is implicit and MUST NOT be provided when exchanging
host and domain names.
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2.2. Contact and Client Identifiers
All EPP contacts are identified by a server-unique identifier.
Contact identifiers are character strings with a specified minimum
length, a specified maximum length, and a specified format. Contact
identifiers use the "clIDType" client identifier syntax described in
[RFC3730].
2.3. Status Values
A domain object MUST always have at least one associated status
value. Status values can be set only by the client that sponsors a
domain object and by the server on which the object resides. A
client can change the status of a domain object using the EPP
command. Each status value MAY be accompanied by a string
of human-readable text that describes the rationale for the status
applied to the object.
A client MUST NOT alter status values set by the server. A server
MAY alter or override status values set by a client subject to local
server policies. The status of an object MAY change as a result of
either a client-initiated transform command or an action performed by
a server operator.
Status values that can be added or removed by a client are prefixed
with "client". Corresponding status values that can be added or
removed by a server are prefixed with "server". Status values that
do not begin with either "client" or "server" are server-managed.
Status Value Descriptions:
- clientDeleteProhibited, serverDeleteProhibited
Requests to delete the object MUST be rejected.
- clientHold, serverHold
DNS delegation information MUST NOT be published for the object.
- clientRenewProhibited, serverRenewProhibited
Requests to renew the object MUST be rejected.
- clientTransferProhibited, serverTransferProhibited
Requests to transfer the object MUST be rejected.
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- clientUpdateProhibited, serverUpdateProhibited
Requests to update the object (other than to remove this status) MUST
be rejected.
- inactive
Delegation information has not been associated with the object.
- ok
This is the normal status value for an object that has no pending
operations or prohibitions. This value is set and removed by the
server as other status values are added or removed.
- pendingCreate, pendingDelete, pendingRenew, pendingTransfer,
pendingUpdate
A transform command has been processed for the object, but the action
has not been completed by the server. Server operators can delay
action completion for a variety of reasons, such as to allow for
human review or third-party action. A transform command that is
processed, but whose requested action is pending, is noted with
response code 1001.
With one exception, transform commands MUST be rejected when a
pendingCreate, pendingDelete, pendingRenew, pendingTransfer, or
pendingUpdate status is set. The only exception is that a
command to approve, reject, or cancel a transfer MAY be processed
while an object is in "pendingTransfer" status.
When the requested action has been completed, the pendingCreate,
pendingDelete, pendingRenew, pendingTransfer, or pendingUpdate status
value MUST be removed. All clients involved in the transaction MUST
be notified using a service message that the action has been
completed and that the status of the object has changed.
"ok" status MUST NOT be combined with any other status.
"pendingDelete" status MUST NOT be combined with either
"clientDeleteProhibited" or "serverDeleteProhibited" status.
"pendingRenew" status MUST NOT be combined with either
"clientRenewProhibited" or "serverRenewProhibited" status.
"pendingTransfer" status MUST NOT be combined with either
"clientTransferProhibited" or "serverTransferProhibited" status.
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"pendingUpdate" status MUST NOT be combined with either
"clientUpdateProhibited" or "serverUpdateProhibited" status.
The pendingCreate, pendingDelete, pendingRenew, pendingTransfer, and
pendingUpdate status values MUST NOT be combined with each other.
Other status combinations not expressly prohibited MAY be used.
2.4. Dates and Times
Date and time attribute values MUST be represented in Universal
Coordinated Time (UTC) using the Gregorian calendar. The extended
date-time form using upper case "T" and "Z" characters defined in
[RFC3339] MUST be used to represent date-time values as XML Schema
does not support truncated date-time forms or lower case "T" and "Z"
characters.
2.5. Validity Periods
A domain name object MAY have a specified validity period. If server
policy supports domain object validity periods, the validity period
is defined when a domain object is created, and it MAY be extended by
the EPP or commands. As a matter of server
policy, this specification does not define actions to be taken upon
expiration of a domain object's validity period.
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. The minimum
allowable period value is one decimal (1). The maximum allowable
value is ninety-nine decimal (99). A server MAY support a lower
maximum value.
2.6. Authorization Information
Authorization information is associated with domain objects to
facilitate transfer operations. Authorization information is
assigned when a domain object is created, and it might be updated in
the future. This specification describes password-based
authorization information, though other mechanisms are possible.
2.7. Other DNS Resource Record Attributes
While the DNS allows many resource record types to be associated with
a domain, this mapping only explicitly specifies elements that
describe resource records used for domain delegation and resolution.
Facilities to provision other domain-related resource record types
can be developed by extending this mapping.
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The provisioning method described in this mapping separates discrete
data elements by data type. This method of data definition allows
XML Schema processors to perform basic syntax validation tasks,
reducing ambiguity and the amount of parsing and syntax-checking work
required of protocol processors. Provisioning and extension methods
that aggregate data into opaque strings are possible, but such
methods SHOULD NOT be used because they impose additional parsing,
interpretation, and validation requirements on protocol processors.
3. EPP Command Mapping
A detailed description of the EPP syntax and semantics can be found
in [RFC3730]. The command mappings described here are specifically
for use in provisioning and managing Internet domain names via EPP.
3.1. EPP Query Commands
EPP provides three commands to retrieve domain information:
to determine if a domain object can be provisioned within a
repository, to retrieve detailed information associated with a
domain object, and to retrieve domain object transfer
status information.
3.1.1. EPP Command
The EPP command is used to determine if an object can be
provisioned within a repository. It provides a hint that allows a
client to anticipate the success or failure of provisioning an object
using the command as object provisioning requirements are
ultimately a matter of server policy.
In addition to the standard EPP command elements, the command
MUST contain a element that identifies the domain
namespace and the location of the domain schema. The
element contains the following child elements:
- One or more elements that contain the fully
qualified names of the domain objects to be queried.
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Example command:
C:
C:
C:
C:
C:
C: example.com
C: example.net
C: example.org
C:
C:
C: ABC-12345
C:
C:
When a command has been processed successfully, the EPP
element MUST contain a child element that
identifies the domain namespace and the location of the domain
schema. The element contains one or more
elements that contain the following child elements:
- A element that contains the fully qualified name of
the queried domain object. This element MUST contain an "avail"
attribute whose value indicates object availability (can it be
provisioned or not) at the moment the command was
completed. A value of "1" or "true" means that the object can be
provisioned. A value of "0" or "false" means that the object can
not be provisioned.
- An OPTIONAL element that MAY be provided when an
object can not be provisioned. If present, this element contains
server-specific text to help explain why the object can not be
provisioned. This text MUST be represented in the response
language previously negotiated with the client; an OPTIONAL "lang"
attribute MAY be present to identify the language if the
negotiated value is something other than the default value of "en"
(English).
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Example response:
S:
S:
S:
S:
S: Command completed successfully
S:
S:
S:
S:
S: example.com
S:
S:
S: example.net
S: In use
S:
S:
S: example.org
S:
S:
S:
S:
S: ABC-12345
S: 54322-XYZ
S:
S:
S:
An EPP error response MUST be returned if a command can not
be processed for any reason.
3.1.2. EPP Command
The EPP command is used to retrieve information associated
with a domain object. The response to this command MAY vary
depending on the identity of the querying client, use of
authorization information, and server policy towards unauthorized
clients. If the querying client is the sponsoring client, all
available information MUST be returned. If the querying client is
not the sponsoring client, but the client provides valid
authorization information, all available information MUST be
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returned. If the querying client is not the sponsoring client, and
the client does not provide valid authorization information, server
policy determines which OPTIONAL elements are returned.
In addition to the standard EPP command elements, the command
MUST contain a element that identifies the domain
namespace and the location of the domain schema. The
element contains the following child elements:
- A element that contains the fully qualified name of
the domain object to be queried. An OPTIONAL "hosts" attribute is
available to control return of information describing hosts
related to the domain object. A value of "all" (the default,
which MAY be absent) returns information describing both
subordinate and delegated hosts. A value of "del" returns
information describing only delegated hosts. A value of "sub"
returns information describing only subordinate hosts. A value of
"none" returns no information describing delegated or subordinate
hosts.
- An OPTIONAL element that contains authorization
information associated with the domain object or authorization
information associated with the domain object's registrant or
associated contacts. An OPTIONAL "roid" attribute MUST be used to
identify the registrant or contact object if and only if the given
authInfo is associated with a registrant or contact object, and
not the domain object itself. If this element is not provided or
if the authorization information is invalid, server policy
determines if the command is rejected or if response information
will be returned to the client.
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Example command without authorization information:
C:
C:
C:
C:
C:
C: example.com
C:
C:
C: ABC-12345
C:
C:
Example command with authorization information:
C:
C:
C:
C:
C:
C: example.com
C:
C: 2fooBAR
C:
C:
C:
C: ABC-12345
C:
C:
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When an command has been processed successfully, the EPP
element MUST contain a child element that
identifies the domain namespace and the location of the domain
schema. Elements that are not OPTIONAL MUST be returned; OPTIONAL
elements are returned based on client authorization and server
policy. The element contains the following child
elements:
- A element that contains the fully qualified name of
the domain object.
- A element that contains the Repository Object
IDentifier assigned to the domain object when the object was
created.
- Zero or more OPTIONAL elements that contain the
current status descriptors associated with the domain.
- If supported by the server, one OPTIONAL
element and one or more OPTIONAL elements that
contain identifiers for the human or organizational social
information objects associated with the domain object.
- An OPTIONAL element that contains the fully qualified
names of the delegated host objects or host attributes (name
servers) associated with the domain object. See section 1.1 for a
description of the elements used to specify host objects or host
attributes.
- Zero or more OPTIONAL elements that contain the
fully qualified names of the subordinate host objects that exist
under this superordinate domain object.
- A element that contains the identifier of the
sponsoring client.
- An OPTIONAL element that contains the identifier of
the client that created the domain object.
- An OPTIONAL element that contains the date and
time of domain object creation.
- An OPTIONAL element that contains the date and
time identifying the end of the domain object's registration
period.
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- An OPTIONAL element that contains the identifier of
the client that last updated the domain object. This element MUST
NOT be present if the domain has never been modified.
- An OPTIONAL element that contains the date and
time of the most recent domain object modification. This element
MUST NOT be present if the domain object has never been modified.
- An OPTIONAL elements that contains the date and
time of the most recent successful domain object transfer. This
element MUST NOT be provided if the domain object has never been
transferred.
- An OPTIONAL element that contains authorization
information associated with the domain object. This element MUST
only be returned if the querying client is the current sponsoring
client, or if the client supplied valid authorization information
with the command.
Example response for an authorized client:
S:
S:
S:
S:
S: Command completed successfully
S:
S:
S:
S: example.com
S: EXAMPLE1-REP
S: jd1234
S: sh8013
S: sh8013
S:
S: ns1.example.com
S: ns1.example.net
S:
S: ns1.example.com
S: ns2.example.com
S: ClientX
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S: ClientY
S: 1999-04-03T22:00:00.0Z
S: ClientX
S: 1999-12-03T09:00:00.0Z
S: 2005-04-03T22:00:00.0Z
S: 2000-04-08T09:00:00.0Z
S:
S: 2fooBAR
S:
S:
S:
S:
S: ABC-12345
S: 54322-XYZ
S:
S:
S:
A server with a different information return policy MAY provide less
information in a response.
Example response for an unauthorized client:
S:
S:
S:
S:
S: Command completed successfully
S:
S:
S:
S: example.com
S: EXAMPLE1-REP
S: ClientX
S:
S:
S:
S: ABC-12345
S: 54322-XYZ
S:
S:
S:
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An EPP error response MUST be returned if an command can not
be processed for any reason.
3.1.3. EPP Query Command
The EPP command provides a query operation that allows a
client to determine real-time status of pending and completed
transfer requests. In addition to the standard EPP command elements,
the command MUST contain an "op" attribute with value
"query", and a element that identifies the domain
namespace and the location of the domain schema. The
element contains the following child elements:
- A element that contains the fully qualified name of
the domain object to be queried.
- An OPTIONAL element that contains authorization
information associated with the domain object or authorization
information associated with the domain object's registrant or
associated contacts. An OPTIONAL "roid" attribute MUST be used to
identify the registrant or contact object if and only if the given
authInfo is associated with a registrant or contact object, and
not the domain object itself. If this element is not provided or
if the authorization information is invalid, server policy
determines if the command is rejected or if response information
will be returned to the client.
Example query command:
C:
C:
C:
C:
C:
C: example.com
C:
C: 2fooBAR
C:
C:
C:
C: ABC-12345
C:
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C:
When a query command has been processed successfully, the
EPP element MUST contain a child element
that identifies the domain namespace and the location of the domain
schema. The element contains the following child
elements:
- A element that contains the fully qualified name of
the domain object.
- A element that contains the state of the most
recent transfer request.
- A element that contains the identifier of the client
that requested the object transfer.
- A element that contains the date and time that the
transfer was requested.
- A element that contains the identifier of the client
that SHOULD act upon the transfer request.
- A element that contains the date and time of a
required or completed response. For a PENDING request, the value
identifies the date and time by which a response is required
before an automated response action will be taken by the server.
For all other status types, the value identifies the date and time
when the request was completed.
- An OPTIONAL element that contains the end of the
domain object's validity period if the command caused
or causes a change in the validity period.
Example query response:
S:
S:
S:
S:
S: Command completed successfully
S:
S:
S:
S: example.com
S: pending
S: ClientX
S: 2000-06-06T22:00:00.0Z
S: ClientY
S: 2000-06-11T22:00:00.0Z
S: 2002-09-08T22:00:00.0Z
S:
S:
S:
S: ABC-12345
S: 54322-XYZ
S:
S:
S:
An EPP error response MUST be returned if a query command
can not be processed for any reason.
3.2. EPP Transform Commands
EPP provides five commands to transform domain objects: to
create an instance of a domain object, to delete an instance
of a domain object, to extend the validity period of a domain
object, to manage domain object sponsorship changes, and
to change information associated with a domain object.
Transform commands are typically processed and completed in real
time. Server operators MAY receive and process transform commands,
but defer completing the requested action if human or third-party
review is required before the requested action can be completed. In
such situations the server MUST return a 1001 response code to the
client to note that the command has been received and processed, but
the requested action is pending. The server MUST also manage the
status of the object that is the subject of the command to reflect
the initiation and completion of the requested action. Once the
action has been completed, all clients involved in the transaction
MUST be notified using a service message that the action has been
completed and that the status of the object has changed.
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3.2.1. EPP Command
The EPP command provides a transform operation that allows a
client to create a domain object. In addition to the standard EPP
command elements, the command MUST contain a
element that identifies the domain namespace and the location of the
domain schema. The element contains the following
child elements:
- A element that contains the fully qualified name of
the domain object to be created.
- An OPTIONAL element that contains the initial
registration period of the domain object. A server MAY define a
default initial registration period if not specified by the
client.
- An OPTIONAL element that contains the fully qualified
names of the delegated host objects or host attributes (name
servers) associated with the domain object to provide resolution
services for the domain; see section 1.1 for a description of the
elements used to specify host objects or host attributes. A host
object MUST be known to the server before the host object can be
associated with a domain object.
- An OPTIONAL element that contains the
identifier for the human or organizational social information
(contact) object to be associated with the domain object as the
object registrant. This object identifier MUST be known to the
server before the contact object can be associated with the domain
object. The EPP mapping for contact objects is described in
[RFC3733].
- Zero or more OPTIONAL elements that contain the
identifiers for other contact objects to be associated with the
domain object. Contact object identifiers MUST be known to the
server before the contact object can be associated with the domain
object.
- A element that contains authorization
information to be associated with the domain object. This mapping
includes a password-based authentication mechanism, but the schema
allows new mechanisms to be defined in new schemas.
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Example command:
C:
C:
C:
C:
C:
C: example.com
C: 2
C:
C: ns1.example.com
C: ns1.example.net
C:
C: jd1234
C: sh8013
C: sh8013
C:
C: 2fooBAR
C:
C:
C:
C: ABC-12345
C:
C:
When a command has been processed successfully, the EPP
element MUST contain a child element that
identifies the domain namespace and the location of the domain
schema. The element contains the following child
elements:
- A element that contains the fully qualified name of
the domain object.
- A element that contains the date and time of
domain object creation.
- An OPTIONAL element that contains the date and
time identifying the end of the domain object's registration
period.
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Example response:
S:
S:
S:
S:
S: Command completed successfully
S:
S:
S:
S: example.com
S: 1999-04-03T22:00:00.0Z
S: 2001-04-03T22:00:00.0Z
S:
S:
S:
S: ABC-12345
S: 54321-XYZ
S:
S:
S:
An EPP error response MUST be returned if a command can not
be processed for any reason.
3.2.2. EPP Command
The EPP command provides a transform operation that allows a
client to delete a domain object. In addition to the standard EPP
command elements, the command MUST contain a
element that identifies the domain namespace and the location of the
domain schema. The element contains the following
child elements:
- A element that contains the fully qualified name of
the domain object to be deleted.
A domain object SHOULD NOT be deleted if subordinate host objects are
associated with the domain object. For example, if domain
"example.com" exists, and host object "ns1.example.com" also exists,
then domain "example.com" SHOULD NOT be deleted until host
"ns1.example.com" has been either deleted or renamed to exist in a
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RFC 3731 EPP Domain Name Mapping March 2004
different superordinate domain. A server SHOULD notify clients that
object relationships exist by sending a 2305 error response code when
a command is attempted and fails due to existing object
relationships. Delegated and subordinate host objects associated
with a domain object can be determined using the query command
for the domain object.
Example command:
C:
C:
C:
C:
C:
C: example.com
C:
C:
C: ABC-12345
C:
C:
When a command has been processed successfully, a server
MUST respond with an EPP response with no element.
Example response:
S:
S:
S:
S:
S: Command completed successfully
S:
S:
S: ABC-12345
S: 54321-XYZ
S:
S:
S:
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An EPP error response MUST be returned if a command can not
be processed for any reason.
3.2.3. EPP Command
The EPP command provides a transform operation that allows a
client to extend the validity period of a domain object. In addition
to the standard EPP command elements, the command MUST
contain a element that identifies the domain namespace
and the location of the domain schema. The element
contains the following child elements:
- A element that contains the fully qualified name of
the domain object whose validity period is to be extended.
- A element that contains the date on which the
current validity period ends. This value ensures that repeated
commands do not result in multiple unanticipated
successful renewals.
- An OPTIONAL element that contains the number of
units to be added to the registration period of the domain object.
The number of units available MAY be subject to limits imposed by
the server.
Example command:
C:
C:
C:
C:
C:
C: example.com
C: 2000-04-03
C: 5
C:
C:
C: ABC-12345
C:
C:
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When a command has been processed successfully, the EPP
element MUST contain a child element that
identifies the domain namespace and the location of the domain
schema. The element contains the following child
elements:
- A element that contains the fully qualified name of
the domain object.
- An OPTIONAL element that contains the date and
time identifying the end of the domain object's registration
period.
Example response:
S:
S:
S:
S:
S: Command completed successfully
S:
S:
S:
S: example.com
S: 2005-04-03T22:00:00.0Z
S:
S:
S:
S: ABC-12345
S: 54322-XYZ
S:
S:
S:
An EPP error response MUST be returned if a command can not
be processed for any reason.
3.2.4. EPP Command
The EPP command provides a transform operation that allows
a client to manage requests to transfer the sponsorship of a domain
object. In addition to the standard EPP command elements, the
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command MUST contain a element that
identifies the domain namespace and the location of the domain
schema. The element contains the following child
elements:
- A element that contains the fully qualified name of
the domain object for which a transfer request is to be created,
approved, rejected, or cancelled.
- An OPTIONAL element that contains the number of
units to be added to the registration period of the domain object
at completion of the transfer process. This element can only be
used when a transfer is requested, and it MUST be ignored if used
otherwise. The number of units available MAY be subject to limits
imposed by the server.
- A element that contains authorization
information associated with the domain object or authorization
information associated with the domain object's registrant or
associated contacts. An OPTIONAL "roid" attribute MUST be used to
identify the registrant or contact object if and only if the given
authInfo is associated with a registrant or contact object, and
not the domain object itself.
Every EPP command MUST contain an "op" attribute that
identifies the transfer operation to be performed. Valid values,
definitions, and authorizations for all attribute values are defined
in [RFC3730].
Transfer of a domain object MUST implicitly transfer all host objects
that are subordinate to the domain object. For example, if domain
object "example.com" is transferred and host object "ns1.example.com"
exists, the host object MUST be transferred as part of the
"example.com" transfer process. Host objects that are subject to
transfer when transferring a domain object are listed in the response
to an EPP command performed on the domain object.
Example request command:
C:
C:
C:
C:
C:
C: example.com
C: 1
C:
C: 2fooBAR
C:
C:
C:
C: ABC-12345
C:
C:
When a command has been processed successfully, the EPP
element MUST contain a child element that
identifies the domain namespace and the location of the domain
schema. The element contains the same child
elements defined for a transfer query response.
Example response:
S:
S:
S:
S:
S: Command completed successfully; action pending
S:
S:
S:
S: example.com
S: pending
S: ClientX
S: 2000-06-08T22:00:00.0Z
S: ClientY
S: 2000-06-13T22:00:00.0Z
S: 2002-09-08T22:00:00.0Z
S:
S:
S:
S: ABC-12345
S: 54322-XYZ
S:
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S:
S:
An EPP error response MUST be returned if a command can
not be processed for any reason.
3.2.5. EPP Command
The EPP command provides a transform operation that allows a
client to modify the attributes of a domain object. In addition to
the standard EPP command elements, the command MUST contain
a element that identifies the domain namespace and
the location of the domain schema. The element
contains the following child elements:
- A element that contains the fully qualified name of
the domain object to be updated.
- An OPTIONAL element that contains attribute values to
be added to the object.
- An OPTIONAL element that contains attribute values to
be removed from the object.
- An OPTIONAL element that contains object attribute
values to be changed.
At least one , , or element MUST
be provided. The and elements contain the
following child elements:
- An OPTIONAL element that contains the fully qualified
names of the delegated host objects or host attributes (name
servers) associated with the domain object to provide resolution
services for the domain; see section 1.1 for a description of the
elements used to specify host objects or host attributes. A host
object MUST be known to the server before the host object can be
associated with a domain object. If host attributes are used to
specify name servers, note that IP address elements are not needed
to identify a name server that is being removed. IP address
elements can safely be absent or ignored in this situation.
- Zero or more elements that contain the
identifiers for contact objects to be associated with or removed
from the domain object. Contact object identifiers MUST be known
to the server before the contact object can be associated with the
domain object.
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- Zero or more elements that contain status values
to be applied to or removed from the object. When specifying a
value to be removed, only the attribute value is significant;
element text is not required to match a value for removal.
A element contains the following child elements:
- A element that contains the identifier for the
human or organizational social information (contact) object to be
associated with the domain object as the object registrant. This
object identifier MUST be known to the server before the contact
object can be associated with the domain object. An empty element
can be used to remove registrant information.
- A element that contains authorization
information associated with the domain object. This mapping
includes a password-based authentication mechanism, but the schema
allows new mechanisms to be defined in new schemas. A
element can be used within the
element to remove authorization information.
Example command:
C:
C:
C:
C:
C:
C: example.com
C:
C:
C: ns2.example.com
C:
C: mak21
C: Payment overdue.
C:
C:
C:
C: ns1.example.com
C:
C: sh8013
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C:
C:
C: sh8013
C:
C: 2BARfoo
C:
C:
C:
C:
C: ABC-12345
C:
C:
When an command has been processed successfully, a server
MUST respond with an EPP response with no element.
Example response:
S:
S:
S:
S:
S: Command completed successfully
S:
S:
S: ABC-12345
S: 54321-XYZ
S:
S:
S:
An EPP error response MUST be returned if an command can not
be processed for any reason.
3.2.6. Offline Review of Requested Actions
Commands are processed by a server in the order they are received
from a client. Though an immediate response confirming receipt and
processing of the command is produced by the server, a server
operator MAY perform an offline review of requested transform
commands before completing the requested action. In such situations
the response from the server MUST clearly note that the transform
command has been received and processed, but the requested action is
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pending. The status of the corresponding object MUST clearly reflect
processing of the pending action. The server MUST notify the client
when offline processing of the action has been completed.
Examples describing a command that requires offline review
are included here. Note the result code and message returned in
response to the command.
S:
S:
S:
S:
S: Command completed successfully; action pending
S:
S:
S:
S: example.com
S: 1999-04-03T22:00:00.0Z
S: 2001-04-03T22:00:00.0Z
S:
S:
S:
S: ABC-12345
S: 54321-XYZ
S:
S:
S:
The status of the domain object after returning this response MUST
include "pendingCreate". The server operator reviews the request
offline, and informs the client of the outcome of the review by
queuing a service message for retrieval via the command.
The service message MUST contain text in the , ,
element that describes the notification. In addition, the EPP
element MUST contain a child element that
identifies the domain namespace and the location of the domain
schema. The element contains the following child
elements:
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- A element that contains the fully qualified name of
the domain object. The element contains a REQUIRED
"paResult" attribute. A positive boolean value indicates that the
request has been approved and completed. A negative boolean value
indicates that the request has been denied and the requested
action has not been taken.
- A element that contains the client transaction
identifier and server transaction identifier returned with the
original response to process the command. The client transaction
identifier is OPTIONAL and will only be returned if the client
provided an identifier with the original command.
- A element that contains the date and time
describing when review of the requested action was completed.
Example "review completed" service message:
S:
S:
S:
S:
S: Command completed successfully; ack to dequeue
S:
S:
S: 1999-04-04T22:01:00.0Z
S: Pending action completed successfully.
S:
S:
S:
S: example.com
S:
S: ABC-12345
S: 54321-XYZ
S:
S: 1999-04-04T22:00:00.0Z
S:
S:
S:
S: BCD-23456
S: 65432-WXY
S:
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S:
S:
4. Formal Syntax
An EPP object mapping is specified in XML Schema notation. The
formal syntax presented here is a complete schema representation of
the object mapping suitable for automated validation of EPP XML
instances. The BEGIN and END tags are not part of the schema; they
are used to note the beginning and ending of the schema for URI
registration purposes.
BEGIN
Extensible Provisioning Protocol v1.0
domain provisioning schema.
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RFC 3731 EPP Domain Name Mapping March 2004
END
5. Internationalization Considerations
EPP is represented in XML, which provides native support for encoding
information using the Unicode character set and its more compact
representations including UTF-8. Conformant XML processors recognize
both UTF-8 and UTF-16 [RFC2781]. Though XML includes provisions to
identify and use other character encodings through use of an
"encoding" attribute in an declaration, use of UTF-8 is
RECOMMENDED in environments where parser encoding support
incompatibility exists.
All date-time values presented via EPP MUST be expressed in Universal
Coordinated Time using the Gregorian calendar. XML Schema allows use
of time zone identifiers to indicate offsets from the zero meridian,
but this option MUST NOT be used with EPP. The extended date-time
form using upper case "T" and "Z" characters defined in [RFC3339]
MUST be used to represent date-time values as XML Schema does not
support truncated date-time forms or lower case "T" and "Z"
characters.
This document requires domain and host name syntax as specified in
[RFC952] as updated by [RFC1123]. At the time of this writing, RFC
3490 [RFC3490] describes a standard to use certain ASCII name labels
to represent non-ASCII name labels. These conformance requirements
might change as a result of progressing work in developing standards
for internationalized domain names.
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6. IANA Considerations
This document uses URNs to describe XML namespaces and XML schemas
conforming to a registry mechanism described in [RFC3688]. Two URI
assignments have been registered by the IANA.
Registration request for the domain namespace:
URI: urn:ietf:params:xml:ns:domain-1.0
Registrant Contact: See the "Author's Address" section of this
document.
XML: None. Namespace URIs do not represent an XML specification.
Registration request for the domain XML schema:
URI: urn:ietf:params:xml:schema:domain-1.0
Registrant Contact: See the "Author's Address" section of this
document.
XML: See the "Formal Syntax" section of this document.
7. Security Considerations
Authorization information as described in section 2.6 is REQUIRED to
create a domain object. This information is used in some query and
transfer operations as an additional means of determining client
authorization to perform the command. Failure to protect
authorization information from inadvertent disclosure can result in
unauthorized transfer operations and unauthorized information
release. Both client and server MUST ensure that authorization
information is stored and exchanged with high-grade encryption
mechanisms to provide privacy services.
The object mapping described in this document does not provide any
other security services or introduce any additional considerations
beyond those described by [RFC3730] and protocol layers used by EPP.
8. Acknowledgements
This document was originally written as an individual submission
Internet-Draft. The provreg working group later adopted it as a
working group document and provided many invaluable comments and
suggested improvements. The author wishes to acknowledge the efforts
of WG chairs Edward Lewis and Jaap Akkerhuis for their process and
editorial contributions.
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Specific suggestions that have been incorporated into this document
were provided by Joe Abley, Chris Bason, Eric Brunner-Williams,
Jordyn Buchanan, Dave Crocker, Ayesha Damaraju, Anthony Eden, Sheer
El-Showk, Klaus Malorny, Dan Manley, Michael Mealling, Patrick
Mevzek, Asbjorn Steira, Bruce Tonkin, and Rick Wesson.
9. References
9.1. Normative References
[RFC952] Harrenstien, K., Stahl, M. and E. Feinler, "DOD Internet
Host Table Specification", RFC 952, October 1985.
[RFC1123] Braden, R., Ed., "Requirements for Internet Hosts --
Application and Support", STD 3, RFC 1123, October 1989.
[RFC2119] Bradner, S., "Key Words for Use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC3339] Klyne, G. and C. Newman, "Date and Time on the Internet:
Timestamps", RFC 3339, July 2002.
[RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
January 2004.
[RFC3730] Hollenbeck, S., "Extensible Provisioning Protocol (EPP)",
RFC 3730, March 2004.
[RFC3732] Hollenbeck, S., "Extensible Provisioning Protocol (EPP)
Host Mapping", RFC 3732, March 2004.
[RFC3733] Hollenbeck, S., "Extensible Provisioning Protocol (EPP)
Contact Mapping", RFC 3733, March 2004.
[XML] Editor T. Bray et al.: "Extensible Markup Language (XML)
1.0 (Second Edition)", W3C Recommendation 6 October 2000.
[XMLS-1] Editors H. Thompson et al.: "XML Schema Part 1:
Structures", W3C Recommendation 2 May 2001.
[XMLS-2] Editors P. Biron, A. Malhotra: "XML Schema Part 2:
Datatypes", W3C Recommendation 2 May 2001.
9.2. Informative References
[RFC2781] Hoffman, P. and F. Yergeau, "UTF-16, an encoding of ISO
10646", RFC 2781, February 2000.
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RFC 3731 EPP Domain Name Mapping March 2004
[RFC3490] Faltstrom, P., Hoffman, P. and A. Costello,
"Internationalizing Domain Names in Applications (IDNA)",
RFC 3490, March 2003.
10. Author's Address
Scott Hollenbeck
VeriSign Global Registry Services
21345 Ridgetop Circle
Dulles, VA 20166-6503
USA
EMail: shollenbeck@verisign.com
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RFC 3731 EPP Domain Name Mapping March 2004
11. Full Copyright Statement
Copyright (C) The Internet Society (2004). This document is subject
to the rights, licenses and restrictions contained in BCP 78 and
except as set forth therein, the authors retain all their rights.
This document and the information contained herein are provided on an
"AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS
OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY AND THE INTERNET
ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE
INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
Intellectual Property
The IETF takes no position regarding the validity or scope of any
Intellectual Property Rights or other rights that might be claimed to
pertain to the implementation or use of the technology described in
this document or the extent to which any license under such rights
might or might not be available; nor does it represent that it has
made any independent effort to identify any such rights. Information
on the procedures with respect to rights in RFC documents can be
found in BCP 78 and BCP 79.
Copies of IPR disclosures made to the IETF Secretariat and any
assurances of licenses to be made available, or the result of an
attempt made to obtain a general license or permission for the use of
such proprietary rights by implementers or users of this
specification can be obtained from the IETF on-line IPR repository at
http://www.ietf.org/ipr.
The IETF invites any interested party to bring to its attention any
copyrights, patents or patent applications, or other proprietary
rights that may cover technology that may be required to implement
this standard. Please address the information to the IETF at ietf-
ipr@ietf.org.
Acknowledgement
Funding for the RFC Editor function is currently provided by the
Internet Society.
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RFC, FYI, BCP