Network Working Group                                      S. Hollenbeck
Internet-Draft                                            VeriSign, Inc.
Obsoletes: 3731 (if approved)                          November 17, 2006
Intended status: Standards Track
Expires: May 21, 2007


       Extensible Provisioning Protocol (EPP) Domain Name Mapping
                 draft-hollenbeck-epp-rfc3731bis-05.txt

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Copyright Notice

   Copyright (C) The IETF Trust (2006).

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.
   This document obsoletes RFC 3731 if approved.





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Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1.  Relationship of Domain Objects and Host Objects  . . . . .  3
     1.2.  Conventions Used In This Document  . . . . . . . . . . . .  5
   2.  Object Attributes  . . . . . . . . . . . . . . . . . . . . . .  5
     2.1.  Domain and Host Names  . . . . . . . . . . . . . . . . . .  5
     2.2.  Contact and Client Identifiers . . . . . . . . . . . . . .  6
     2.3.  Status Values  . . . . . . . . . . . . . . . . . . . . . .  6
     2.4.  Dates and Times  . . . . . . . . . . . . . . . . . . . . .  8
     2.5.  Validity Periods . . . . . . . . . . . . . . . . . . . . .  8
     2.6.  Authorization Information  . . . . . . . . . . . . . . . .  8
     2.7.  Other DNS Resource Record Attributes . . . . . . . . . . .  8
   3.  EPP Command Mapping  . . . . . . . . . . . . . . . . . . . . .  9
     3.1.  EPP Query Commands . . . . . . . . . . . . . . . . . . . .  9
       3.1.1.  EPP <check> Command  . . . . . . . . . . . . . . . . .  9
       3.1.2.  EPP <info> Command . . . . . . . . . . . . . . . . . . 11
       3.1.3.  EPP <transfer> Query Command . . . . . . . . . . . . . 16
     3.2.  EPP Transform Commands . . . . . . . . . . . . . . . . . . 18
       3.2.1.  EPP <create> Command . . . . . . . . . . . . . . . . . 19
       3.2.2.  EPP <delete> Command . . . . . . . . . . . . . . . . . 21
       3.2.3.  EPP <renew> Command  . . . . . . . . . . . . . . . . . 22
       3.2.4.  EPP <transfer> Command . . . . . . . . . . . . . . . . 24
       3.2.5.  EPP <update> Command . . . . . . . . . . . . . . . . . 26
     3.3.  Offline Review of Requested Actions  . . . . . . . . . . . 29
   4.  Formal Syntax  . . . . . . . . . . . . . . . . . . . . . . . . 31
   5.  Internationalization Considerations  . . . . . . . . . . . . . 41
   6.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 41
   7.  Security Considerations  . . . . . . . . . . . . . . . . . . . 42
   8.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 42
   9.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 42
     9.1.  Normative References . . . . . . . . . . . . . . . . . . . 42
     9.2.  Informative References . . . . . . . . . . . . . . . . . . 43
   Appendix A.  Changes from RFC 3731 . . . . . . . . . . . . . . . . 44
   Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 45
   Intellectual Property and Copyright Statements . . . . . . . . . . 46















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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 [W3C.REC-xml-20040204] and XML Schema notation as described in
   [W3C.REC-xmlschema-1-20041028] and [W3C.REC-xmlschema-2-20041028].
   This document obsoletes RFC 3731 [RFC3731] if approved.

   [I-D.hollenbeck-epp-rfc3730bis] 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
   [I-D.hollenbeck-epp-rfc3732bis].  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.

   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



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   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 <domain:ns> element.  This
   element MUST contain one or more <domain:hostObj> elements or one or
   more <domain:hostAttr> elements.  A <domain:hostObj> element contains
   the fully qualified name of a known name server host object.  A
   <domain:hostAttr> element contains the following child elements:

   -  A <domain:hostName> element that contains the fully qualified name
      of a host.

   -  Zero or more OPTIONAL <domain:hostAddr> 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 [I-D.hollenbeck-epp-rfc3732bis].

   Example host object name server elements for domain example.com:

   <domain:ns>
     <domain:hostObj>ns1.example.com</domain:hostObj>
     <domain:hostObj>ns1.example.net</domain:hostObj>
   </domain:ns>

















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   Example host attribute name server elements for domain example.com:

   <domain:ns>
     <domain:hostAttr>
       <domain:hostName>ns1.example.com</domain:hostName>
       <domain:hostAddr
        ip="v4">192.0.2.2</domain:hostAddr>
       <domain:hostAddr
        ip="v6">1080:0:0:0:8:800:200C:417A</domain:hostAddr>
     </domain:hostAttr>
     <domain:hostAttr>
       <domain:hostName>ns1.example.net</domain:hostName>
     </domain:hostAttr>
   </domain:ns>

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 [RFC0952] 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



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   host and domain names.

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
   [I-D.hollenbeck-epp-rfc3730bis].

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
   <update> 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.







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   -  clientTransferProhibited, serverTransferProhibited

      Requests to transfer the object MUST be rejected.

   -  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.

   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.

   "pendingUpdate" status MUST NOT be combined with either
   "clientUpdateProhibited" or "serverUpdateProhibited" status.



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   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
   [W3C.REC-xmlschema-2-20041028] 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 <renew> or <transfer> 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.

   The provisioning method described in this mapping separates discrete
   data elements by data type.  This method of data definition allows



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   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 [I-D.hollenbeck-epp-rfc3730bis].  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: <check>
   to determine if a domain object can be provisioned within a
   repository, <info> to retrieve detailed information associated with a
   domain object, and <transfer> to retrieve domain object transfer
   status information.

3.1.1.  EPP <check> Command

   The EPP <check> 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 <create> command as object provisioning requirements are
   ultimately a matter of server policy.

   In addition to the standard EPP command elements, the <check> command
   MUST contain a <domain:check> element that identifies the domain
   namespace.  The <domain:check> element contains the following child
   elements:

   -  One or more <domain:name> elements that contain the fully
      qualified names of the domain objects to be queried.













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   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.org</domain:name>
   C:      </domain:check>
   C:    </check>
   C:    <clTRID>ABC-12345</clTRID>
   C:  </command>
   C:</epp>

   When a <check> command has been processed successfully, the EPP
   <resData> element MUST contain a child <domain:chkData> element that
   identifies the domain namespace.  The <domain:chkData> element
   contains one or more <domain:cd> elements that contain the following
   child elements:

   -  A <domain:name> 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 <check> 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 <domain:reason> 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 <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="0">example.net</domain:name>
   S:          <domain:reason>In use</domain:reason>
   S:        </domain:cd>
   S:        <domain:cd>
   S:          <domain:name avail="1">example.org</domain:name>
   S:        </domain:cd>
   S:      </domain:chkData>
   S:    </resData>
   S:    <trID>
   S:      <clTRID>ABC-12345</clTRID>
   S:      <svTRID>54322-XYZ</svTRID>
   S:    </trID>
   S:  </response>
   S:</epp>

   An EPP error response MUST be returned if a <check> command can not
   be processed for any reason.

3.1.2.  EPP <info> Command

   The EPP <info> 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
   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 <info> command



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   MUST contain a <domain:info> element that identifies the domain
   namespace.  The <domain:info> element contains the following child
   elements:

   -  A <domain:name> 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 <domain:authInfo> 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 <info> command without authorization information:

   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:      <domain:info
   C:       xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
   C:        <domain:name hosts="all">example.com</domain:name>
   C:      </domain:info>
   C:    </info>
   C:    <clTRID>ABC-12345</clTRID>
   C:  </command>
   C:</epp>











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   Example <info> command with authorization information:

   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:      <domain:info
   C:       xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
   C:        <domain:name hosts="all">example.com</domain:name>
   C:        <domain:authInfo>
   C:          <domain:pw>2fooBAR</domain:pw>
   C:        </domain:authInfo>
   C:      </domain: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 <domain:infData> element that
   identifies the domain namespace.  Elements that are not OPTIONAL MUST
   be returned; OPTIONAL elements are returned based on client
   authorization and server policy.  The <domain:infData> element
   contains the following child elements:

   -  A <domain:name> element that contains the fully qualified name of
      the domain object.

   -  A <domain:roid> element that contains the Repository Object
      IDentifier assigned to the domain object when the object was
      created.

   -  Zero or more OPTIONAL <domain:status> elements that contain the
      current status descriptors associated with the domain.

   -  If supported by the server, one OPTIONAL <domain:registrant>
      element and one or more OPTIONAL <domain:contact> elements that
      contain identifiers for the human or organizational social
      information objects associated with the domain object.

   -  An OPTIONAL <domain:ns> 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.






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   -  Zero or more OPTIONAL <domain:host> elements that contain the
      fully qualified names of the subordinate host objects that exist
      under this superordinate domain object.

   -  A <domain:clID> element that contains the identifier of the
      sponsoring client.

   -  An OPTIONAL <domain:crID> element that contains the identifier of
      the client that created the domain object.

   -  An OPTIONAL <domain:crDate> element that contains the date and
      time of domain object creation.

   -  An OPTIONAL <domain:exDate> element that contains the date and
      time identifying the end of the domain object's registration
      period.

   -  An OPTIONAL <domain:upID> 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 <domain:upDate> 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 <domain:trDate> 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 <domain:authInfo> 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.
















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   Example <info> response for an authorized client:

   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:infData
   S:       xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
   S:        <domain:name>example.com</domain:name>
   S:        <domain:roid>EXAMPLE1-REP</domain:roid>
   S:        <domain:status s="ok"/>
   S:        <domain:registrant>jd1234</domain:registrant>
   S:        <domain:contact type="admin">sh8013</domain:contact>
   S:        <domain:contact type="tech">sh8013</domain:contact>
   S:        <domain:ns>
   S:          <domain:hostObj>ns1.example.com</domain:hostObj>
   S:          <domain:hostObj>ns1.example.net</domain:hostObj>
   S:        </domain:ns>
   S:        <domain:host>ns1.example.com</domain:host>
   S:        <domain:host>ns2.example.com</domain:host>
   S:        <domain:clID>ClientX</domain:clID>
   S:        <domain:crID>ClientY</domain:crID>
   S:        <domain:crDate>1999-04-03T22:00:00.0Z</domain:crDate>
   S:        <domain:upID>ClientX</domain:upID>
   S:        <domain:upDate>1999-12-03T09:00:00.0Z</domain:upDate>
   S:        <domain:exDate>2005-04-03T22:00:00.0Z</domain:exDate>
   S:        <domain:trDate>2000-04-08T09:00:00.0Z</domain:trDate>
   S:        <domain:authInfo>
   S:          <domain:pw>2fooBAR</domain:pw>
   S:        </domain:authInfo>
   S:      </domain:infData>
   S:    </resData>
   S:    <trID>
   S:      <clTRID>ABC-12345</clTRID>
   S:      <svTRID>54322-XYZ</svTRID>
   S:    </trID>
   S:  </response>
   S:</epp>

   A server with a different information return policy MAY provide less
   information in a response.







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   Example <info> response for an unauthorized client:

   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:infData
   S:       xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
   S:        <domain:name>example.com</domain:name>
   S:        <domain:roid>EXAMPLE1-REP</domain:roid>
   S:        <domain:clID>ClientX</domain:clID>
   S:      </domain:infData>
   S:    </resData>
   S:    <trID>
   S:      <clTRID>ABC-12345</clTRID>
   S:      <svTRID>54322-XYZ</svTRID>
   S:    </trID>
   S:  </response>
   S:</epp>

   An EPP error response MUST be returned if an <info> command can not
   be processed for any reason.

3.1.3.  EPP <transfer> Query Command

   The EPP <transfer> 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 <transfer> command MUST contain an "op" attribute with value
   "query", and a <domain:transfer> element that identifies the domain
   namespace.  The <domain:transfer> element contains the following
   child elements:

   -  A <domain:name> element that contains the fully qualified name of
      the domain object to be queried.

   -  An OPTIONAL <domain:authInfo> 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



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      will be returned to the client.

   Example <transfer> query 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="query">
   C:      <domain:transfer
   C:       xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
   C:        <domain:name>example.com</domain:name>
   C:        <domain:authInfo>
   C:          <domain:pw roid="JD1234-REP">2fooBAR</domain:pw>
   C:        </domain:authInfo>
   C:      </domain:transfer>
   C:    </transfer>
   C:    <clTRID>ABC-12345</clTRID>
   C:  </command>
   C:</epp>

   When a <transfer> query command has been processed successfully, the
   EPP <resData> element MUST contain a child <domain:trnData> element
   that identifies the domain namespace.  The <domain:trnData> element
   contains the following child elements:

   -  A <domain:name> element that contains the fully qualified name of
      the domain object.

   -  A <domain:trStatus> element that contains the state of the most
      recent transfer request.

   -  A <domain:reID> element that contains the identifier of the client
      that requested the object transfer.

   -  A <domain:reDate> element that contains the date and time that the
      transfer was requested.

   -  A <domain:acID> element that contains the identifier of the client
      that SHOULD act upon a PENDING transfer request.  For all other
      status types, the value identifies the client that took the
      indicated action.

   -  A <domain:acDate> 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.



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   -  An OPTIONAL <domain:exDate> element that contains the end of the
      domain object's validity period if the <transfer> command caused
      or causes a change in the validity period.

   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="1000">
   S:      <msg>Command completed successfully</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>2000-06-06T22:00:00.0Z</domain:reDate>
   S:        <domain:acID>ClientY</domain:acID>
   S:        <domain:acDate>2000-06-11T22:00:00.0Z</domain:acDate>
   S:        <domain:exDate>2002-09-08T22:00:00.0Z</domain:exDate>
   S:      </domain:trnData>
   S:    </resData>
   S:    <trID>
   S:      <clTRID>ABC-12345</clTRID>
   S:      <svTRID>54322-XYZ</svTRID>
   S:    </trID>
   S:  </response>
   S:</epp>

   An EPP error response MUST be returned if a <transfer> query command
   can not be processed for any reason.

3.2.  EPP Transform Commands

   EPP provides five commands to transform domain objects: <create> to
   create an instance of a domain object, <delete> to delete an instance
   of a domain object, <renew> to extend the validity period of a domain
   object, <transfer> to manage domain object sponsorship changes, and
   <update> 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



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   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.

3.2.1.  EPP <create> Command

   The EPP <create> command provides a transform operation that allows a
   client to create a domain object.  In addition to the standard EPP
   command elements, the <create> command MUST contain a <domain:create>
   element that identifies the domain namespace.  The <domain:create>
   element contains the following child elements:

   -  A <domain:name> element that contains the fully qualified name of
      the domain object to be created.

   -  An OPTIONAL <domain:period> 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 <domain:ns> 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 <domain:registrant> 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
      [I-D.hollenbeck-epp-rfc3733bis].

   -  Zero or more OPTIONAL <domain:contact> 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.







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   -  A <domain:authInfo> 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.

   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.com</domain:hostObj>
   C:          <domain:hostObj>ns1.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:    <clTRID>ABC-12345</clTRID>
   C:  </command>
   C:</epp>

   When a <create> command has been processed successfully, the EPP
   <resData> element MUST contain a child <domain:creData> element that
   identifies the domain namespace.  The <domain:creData> element
   contains the following child elements:

   -  A <domain:name> element that contains the fully qualified name of
      the domain object.

   -  A <domain:crDate> element that contains the date and time of
      domain object creation.

   -  An OPTIONAL <domain:exDate> element that contains the date and
      time identifying the end of the domain object's registration
      period.






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   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>1999-04-03T22:00:00.0Z</domain:crDate>
   S:        <domain:exDate>2001-04-03T22:00:00.0Z</domain:exDate>
   S:      </domain:creData>
   S:    </resData>
   S:    <trID>
   S:      <clTRID>ABC-12345</clTRID>
   S:      <svTRID>54321-XYZ</svTRID>
   S:    </trID>
   S:  </response>
   S:</epp>

   An EPP error response MUST be returned if a <create> command can not
   be processed for any reason.

3.2.2.  EPP <delete> Command

   The EPP <delete> command provides a transform operation that allows a
   client to delete a domain object.  In addition to the standard EPP
   command elements, the <delete> command MUST contain a <domain:delete>
   element that identifies the domain namespace.  The <domain:delete>
   element contains the following child elements:

   -  A <domain:name> 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
   different superordinate domain.  A server SHOULD notify clients that
   object relationships exist by sending a 2305 error response code when
   a <delete> 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 <info> query command
   for the domain object.



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   Example <delete> 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:    <delete>
   C:      <domain:delete
   C:       xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
   C:        <domain:name>example.com</domain:name>
   C:      </domain:delete>
   C:    </delete>
   C:    <clTRID>ABC-12345</clTRID>
   C:  </command>
   C:</epp>

   When a <delete> command has been processed successfully, a server
   MUST respond with an EPP response with no <resData> element.
   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:    <trID>
   S:      <clTRID>ABC-12345</clTRID>
   S:      <svTRID>54321-XYZ</svTRID>
   S:    </trID>
   S:  </response>
   S:</epp>

   An EPP error response MUST be returned if a <delete> command can not
   be processed for any reason.

3.2.3.  EPP <renew> Command

   The EPP <renew> 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 <renew> command MUST
   contain a <domain:renew> element that identifies the domain
   namespace.  The <domain:renew> element contains the following child
   elements:








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   -  A <domain:name> element that contains the fully qualified name of
      the domain object whose validity period is to be extended.

   -  A <domain:curExpDate> element that contains the date on which the
      current validity period ends.  This value ensures that repeated
      <renew> commands do not result in multiple unanticipated
      successful renewals.

   -  An OPTIONAL <domain:period> 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 <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>2000-04-03</domain:curExpDate>
   C:        <domain:period unit="y">5</domain:period>
   C:      </domain:renew>
   C:    </renew>
   C:    <clTRID>ABC-12345</clTRID>
   C:  </command>
   C:</epp>

   When a <renew> command has been processed successfully, the EPP
   <resData> element MUST contain a child <domain:renData> element that
   identifies the domain namespace.  The <domain:renData> element
   contains the following child elements:

   -  A <domain:name> element that contains the fully qualified name of
      the domain object.

   -  An OPTIONAL <domain:exDate> element that contains the date and
      time identifying the end of the domain object's registration
      period.










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   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>2005-04-03T22:00:00.0Z</domain:exDate>
   S:      </domain:renData>
   S:    </resData>
   S:    <trID>
   S:      <clTRID>ABC-12345</clTRID>
   S:      <svTRID>54322-XYZ</svTRID>
   S:    </trID>
   S:  </response>
   S:</epp>

   An EPP error response MUST be returned if a <renew> command can not
   be processed for any reason.

3.2.4.  EPP <transfer> Command

   The EPP <transfer> 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
   <transfer> command MUST contain a <domain:transfer> element that
   identifies the domain namespace.  The <domain:transfer> element
   contains the following child elements:

   -  A <domain:name> 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 <domain:period> 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.







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   -  A <domain:authInfo> 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 <transfer> 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 [I-D.hollenbeck-epp-rfc3730bis].

   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 <info> command performed on the domain object.

   Example <transfer> request 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:    <clTRID>ABC-12345</clTRID>
   C:  </command>
   C:</epp>

   When a <transfer> command has been processed successfully, the EPP
   <resData> element MUST contain a child <domain:trnData> element that
   identifies the domain namespace.  The <domain:trnData> element
   contains the same child elements defined for a transfer query
   response.






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   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>2000-06-08T22:00:00.0Z</domain:reDate>
   S:        <domain:acID>ClientY</domain:acID>
   S:        <domain:acDate>2000-06-13T22:00:00.0Z</domain:acDate>
   S:        <domain:exDate>2002-09-08T22:00:00.0Z</domain:exDate>
   S:      </domain:trnData>
   S:    </resData>
   S:    <trID>
   S:      <clTRID>ABC-12345</clTRID>
   S:      <svTRID>54322-XYZ</svTRID>
   S:    </trID>
   S:  </response>
   S:</epp>

   An EPP error response MUST be returned if a <transfer> command can
   not be processed for any reason.

3.2.5.  EPP <update> Command

   The EPP <update> 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 <update> command MUST contain
   a <domain:update> element that identifies the domain namespace.  The
   <domain:update> element contains the following child elements:

   -  A <domain:name> element that contains the fully qualified name of
      the domain object to be updated.

   -  An OPTIONAL <domain:add> element that contains attribute values to
      be added to the object.








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   -  An OPTIONAL <domain:rem> element that contains attribute values to
      be removed from the object.

   -  An OPTIONAL <domain:chg> element that contains object attribute
      values to be changed.

   At least one <domain:add>, <domain:rem>, or <domain:chg> element MUST
   be provided if the command is not being extended.  All of these
   elements MAY be omitted if an <update> extension is present.  The
   <domain:add> and <domain:rem> elements contain the following child
   elements:

   -  An OPTIONAL <domain:ns> 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 <domain:contact> 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.

   -  Zero or more <domain:status> 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 <domain:chg> element contains the following child elements:

   -  A <domain:registrant> 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 <domain:authInfo> 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 <domain:
      null> element can be used within the <domain:authInfo> element to



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      remove authorization information.

   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:add>
   C:          <domain:ns>
   C:            <domain:hostObj>ns2.example.com</domain:hostObj>
   C:          </domain:ns>
   C:          <domain:contact type="tech">mak21</domain:contact>
   C:          <domain:status s="clientHold"
   C:           lang="en">Payment overdue.</domain:status>
   C:        </domain:add>
   C:        <domain:rem>
   C:          <domain:ns>
   C:            <domain:hostObj>ns1.example.com</domain:hostObj>
   C:          </domain:ns>
   C:          <domain:contact type="tech">sh8013</domain:contact>
   C:          <domain:status s="clientUpdateProhibited"/>
   C:        </domain:rem>
   C:        <domain:chg>
   C:          <domain:registrant>sh8013</domain:registrant>
   C:          <domain:authInfo>
   C:            <domain:pw>2BARfoo</domain:pw>
   C:          </domain:authInfo>
   C:        </domain:chg>
   C:      </domain:update>
   C:    </update>
   C:    <clTRID>ABC-12345</clTRID>
   C:  </command>
   C:</epp>

   When an <update> command has been processed successfully, a server
   MUST respond with an EPP response with no <resData> element.











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   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:    <trID>
   S:      <clTRID>ABC-12345</clTRID>
   S:      <svTRID>54321-XYZ</svTRID>
   S:    </trID>
   S:  </response>
   S:</epp>

   An EPP error response MUST be returned if an <update> command can not
   be processed for any reason.

3.3.  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
   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 <create> command that requires offline review
   are included here.  Note the result code and message returned in
   response to the <create> command.

















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   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:creData
   S:       xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
   S:        <domain:name>example.com</domain:name>
   S:        <domain:crDate>1999-04-03T22:00:00.0Z</domain:crDate>
   S:        <domain:exDate>2001-04-03T22:00:00.0Z</domain:exDate>
   S:      </domain:creData>
   S:    </resData>
   S:    <trID>
   S:      <clTRID>ABC-12345</clTRID>
   S:      <svTRID>54321-XYZ</svTRID>
   S:    </trID>
   S:  </response>
   S:</epp>

   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
   either queuing a service message for retrieval via the <poll> command
   or by using an out-of-band mechanism to inform the client of the
   request.

   The service message MUST contain text in the <response>, <msgQ>,
   <msg> element that describes the notification.  In addition, the EPP
   <resData> element MUST contain a child <domain:panData> element that
   identifies the domain namespace.  The <domain:panData> element
   contains the following child elements:

   -  A <domain:name> element that contains the fully qualified name of
      the domain object.  The <domain:name> 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 <domain:paTRID> 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 <create> command.





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   -  A <domain:paDate> element that contains the date and time
      describing when review of the requested action was completed.

   Example "review completed" service message:

   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="5" id="12345">
   S:      <qDate>1999-04-04T22:01:00.0Z</qDate>
   S:      <msg>Pending action completed successfully.</msg>
   S:    </msgQ>
   S:    <resData>
   S:      <domain:panData
   S:       xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
   S:        <domain:name paResult="1">example.com</domain:name>
   S:        <domain:paTRID>
   S:          <clTRID>ABC-12345</clTRID>
   S:          <svTRID>54321-XYZ</svTRID>
   S:        </domain:paTRID>
   S:        <domain:paDate>1999-04-04T22:00:00.0Z</domain:paDate>
   S:      </domain:panData>
   S:    </resData>
   S:    <trID>
   S:      <clTRID>BCD-23456</clTRID>
   S:      <svTRID>65432-WXY</svTRID>
   S:    </trID>
   S:  </response>
   S:</epp>


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
   <?xml version="1.0" encoding="UTF-8"?>

   <schema targetNamespace="urn:ietf:params:xml:ns:domain-1.0"
        xmlns:domain="urn:ietf:params:xml:ns:domain-1.0"



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        xmlns:host="urn:ietf:params:xml:ns:host-1.0"
        xmlns:epp="urn:ietf:params:xml:ns:epp-1.0"
        xmlns:eppcom="urn:ietf:params:xml:ns:eppcom-1.0"
        xmlns="http://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"/>
   <import namespace="urn:ietf:params:xml:ns:host-1.0"/>

   <annotation>
    <documentation>
      Extensible Provisioning Protocol v1.0
      domain provisioning schema.
    </documentation>
   </annotation>

   <!--
   Child elements found in EPP commands.
   -->
   <element name="check" type="domain:mNameType"/>
   <element name="create" type="domain:createType"/>
   <element name="delete" type="domain:sNameType"/>
   <element name="info" type="domain:infoType"/>
   <element name="renew" type="domain:renewType"/>
   <element name="transfer" type="domain:transferType"/>
   <element name="update" type="domain:updateType"/>
   <!--
   Child elements of the <create> command.
   -->
   <complexType name="createType">
    <sequence>
      <element name="name" type="eppcom:labelType"/>
      <element name="period" type="domain:periodType"
       minOccurs="0"/>
      <element name="ns" type="domain:nsType"
       minOccurs="0"/>
      <element name="registrant" type="eppcom:clIDType"
       minOccurs="0"/>
      <element name="contact" type="domain:contactType"
       minOccurs="0" maxOccurs="unbounded"/>
      <element name="authInfo" type="domain:authInfoType"/>
    </sequence>
   </complexType>




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   <complexType name="periodType">
    <simpleContent>
      <extension base="domain:pLimitType">
        <attribute name="unit" type="domain:pUnitType"
         use="required"/>
      </extension>
    </simpleContent>
   </complexType>

   <simpleType name="pLimitType">
    <restriction base="unsignedShort">
      <minInclusive value="1"/>
      <maxInclusive value="99"/>
    </restriction>
   </simpleType>

   <simpleType name="pUnitType">
    <restriction base="token">
      <enumeration value="y"/>
      <enumeration value="m"/>
    </restriction>
   </simpleType>

   <complexType name="nsType">
    <choice>
      <element name="hostObj" type="eppcom:labelType"
       maxOccurs="unbounded"/>
      <element name="hostAttr" type="domain:hostAttrType"
       maxOccurs="unbounded"/>
    </choice>
   </complexType>
   <!--
   Name servers are either host objects or attributes.
   -->

   <complexType name="hostAttrType">
    <sequence>
      <element name="hostName" type="eppcom:labelType"/>
      <element name="hostAddr" type="host:addrType"
       minOccurs="0" maxOccurs="unbounded"/>
    </sequence>
   </complexType>
   <!--
   If attributes, addresses are optional and follow the
   structure defined in the host mapping.
   -->

   <complexType name="contactType">



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    <simpleContent>
      <extension base="eppcom:clIDType">
        <attribute name="type" type="domain:contactAttrType"/>
      </extension>
    </simpleContent>
   </complexType>

   <simpleType name="contactAttrType">
    <restriction base="token">
      <enumeration value="admin"/>
      <enumeration value="billing"/>
      <enumeration value="tech"/>
    </restriction>
   </simpleType>

   <complexType name="authInfoType">
    <choice>
      <element name="pw" type="eppcom:pwAuthInfoType"/>
      <element name="ext" type="eppcom:extAuthInfoType"/>
    </choice>
   </complexType>

   <!--
   Child element of commands that require a single name.
   -->
   <complexType name="sNameType">
    <sequence>
      <element name="name" type="eppcom:labelType"/>
    </sequence>
   </complexType>
   <!--
   Child element of commands that accept multiple names.
   -->
   <complexType name="mNameType">
    <sequence>
      <element name="name" type="eppcom:labelType"
       maxOccurs="unbounded"/>
    </sequence>
   </complexType>

   <!--
   Child elements of the <info> command.
   -->
   <complexType name="infoType">
    <sequence>
      <element name="name" type="domain:infoNameType"/>
      <element name="authInfo" type="domain:authInfoType"
       minOccurs="0"/>



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    </sequence>
   </complexType>

   <complexType name="infoNameType">
    <simpleContent>
      <extension base = "eppcom:labelType">
        <attribute name="hosts" type="domain:hostsType"
         default="all"/>
      </extension>
    </simpleContent>
   </complexType>

   <simpleType name="hostsType">
    <restriction base="token">
      <enumeration value="all"/>
      <enumeration value="del"/>
      <enumeration value="none"/>
      <enumeration value="sub"/>
    </restriction>
   </simpleType>

   <!--
   Child elements of the <renew> command.
   -->
   <complexType name="renewType">
    <sequence>
      <element name="name" type="eppcom:labelType"/>
      <element name="curExpDate" type="date"/>
      <element name="period" type="domain:periodType"
       minOccurs="0"/>
    </sequence>
   </complexType>

   <!--
   Child elements of the <transfer> command.
   -->
   <complexType name="transferType">
    <sequence>
      <element name="name" type="eppcom:labelType"/>
      <element name="period" type="domain:periodType"
       minOccurs="0"/>
      <element name="authInfo" type="domain:authInfoType"
       minOccurs="0"/>
    </sequence>
   </complexType>

   <!--
   Child elements of the <update> command.



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   -->
   <complexType name="updateType">
    <sequence>
      <element name="name" type="eppcom:labelType"/>
      <element name="add" type="domain:addRemType"
       minOccurs="0"/>
      <element name="rem" type="domain:addRemType"
       minOccurs="0"/>
      <element name="chg" type="domain:chgType"
       minOccurs="0"/>
    </sequence>
   </complexType>

   <!--
   Data elements that can be added or removed.
   -->
   <complexType name="addRemType">
    <sequence>
      <element name="ns" type="domain:nsType"
       minOccurs="0"/>
      <element name="contact" type="domain:contactType"
       minOccurs="0" maxOccurs="unbounded"/>
      <element name="status" type="domain:statusType"
       minOccurs="0" maxOccurs="11"/>
    </sequence>
   </complexType>

   <!--
   Data elements that can be changed.
   -->
   <complexType name="chgType">
    <sequence>
      <element name="registrant" type="domain:clIDChgType"
       minOccurs="0"/>
      <element name="authInfo" type="domain:authInfoChgType"
       minOccurs="0"/>
    </sequence>
   </complexType>

   <!--
   Allow the registrant value to be nullified by changing the
   minLength restriction to "0".
   -->
   <simpleType name="clIDChgType">
    <restriction base="token">
      <minLength value="0"/>
      <maxLength value="16"/>
    </restriction>



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   </simpleType>

   <!--
   Allow the authInfo value to be nullified by including an
   empty element within the choice.
   -->
   <complexType name="authInfoChgType">
    <choice>
      <element name="pw" type="eppcom:pwAuthInfoType"/>
      <element name="ext" type="eppcom:extAuthInfoType"/>
      <element name="null"/>
    </choice>
   </complexType>

   <!--
   Child response elements.
   -->
   <element name="chkData" type="domain:chkDataType"/>
   <element name="creData" type="domain:creDataType"/>
   <element name="infData" type="domain:infDataType"/>
   <element name="panData" type="domain:panDataType"/>
   <element name="renData" type="domain:renDataType"/>
   <element name="trnData" type="domain:trnDataType"/>

   <!--
   <check> response elements.
   -->
   <complexType name="chkDataType">
    <sequence>
      <element name="cd" type="domain:checkType"
       maxOccurs="unbounded"/>
    </sequence>
   </complexType>

   <complexType name="checkType">
    <sequence>
      <element name="name" type="domain:checkNameType"/>
      <element name="reason" type="eppcom:reasonType"
       minOccurs="0"/>
    </sequence>
   </complexType>

   <complexType name="checkNameType">
    <simpleContent>
      <extension base="eppcom:labelType">
        <attribute name="avail" type="boolean"
         use="required"/>
      </extension>



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    </simpleContent>
   </complexType>

   <!--
   <create> response elements.
   -->
   <complexType name="creDataType">
    <sequence>
      <element name="name" type="eppcom:labelType"/>
      <element name="crDate" type="dateTime"/>
      <element name="exDate" type="dateTime"
       minOccurs="0"/>
    </sequence>
   </complexType>

   <!--
   <info> response elements.
   -->
   <complexType name="infDataType">
    <sequence>
      <element name="name" type="eppcom:labelType"/>
      <element name="roid" type="eppcom:roidType"/>
      <element name="status" type="domain:statusType"
       minOccurs="0" maxOccurs="11"/>
      <element name="registrant" type="eppcom:clIDType"
       minOccurs="0"/>
      <element name="contact" type="domain:contactType"
       minOccurs="0" maxOccurs="unbounded"/>
      <element name="ns" type="domain:nsType"
       minOccurs="0"/>
      <element name="host" type="eppcom:labelType"
       minOccurs="0" maxOccurs="unbounded"/>
      <element name="clID" type="eppcom:clIDType"/>
      <element name="crID" type="eppcom:clIDType"
       minOccurs="0"/>
      <element name="crDate" type="dateTime"
       minOccurs="0"/>
      <element name="upID" type="eppcom:clIDType"
       minOccurs="0"/>
      <element name="upDate" type="dateTime"
       minOccurs="0"/>
      <element name="exDate" type="dateTime"
       minOccurs="0"/>
      <element name="trDate" type="dateTime"
       minOccurs="0"/>
      <element name="authInfo" type="domain:authInfoType"
       minOccurs="0"/>
    </sequence>



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   </complexType>

   <!--
   Status is a combination of attributes and an optional
   human-readable message that may be expressed in languages other
   than English.
   -->
   <complexType name="statusType">
    <simpleContent>
      <extension base="normalizedString">
        <attribute name="s" type="domain:statusValueType"
         use="required"/>
        <attribute name="lang" type="language"
         default="en"/>
      </extension>
    </simpleContent>
   </complexType>

   <simpleType name="statusValueType">
    <restriction base="token">
      <enumeration value="clientDeleteProhibited"/>
      <enumeration value="clientHold"/>
      <enumeration value="clientRenewProhibited"/>
      <enumeration value="clientTransferProhibited"/>
      <enumeration value="clientUpdateProhibited"/>
      <enumeration value="inactive"/>
      <enumeration value="ok"/>
      <enumeration value="pendingCreate"/>
      <enumeration value="pendingDelete"/>
      <enumeration value="pendingRenew"/>
      <enumeration value="pendingTransfer"/>
      <enumeration value="pendingUpdate"/>
      <enumeration value="serverDeleteProhibited"/>
      <enumeration value="serverHold"/>
      <enumeration value="serverRenewProhibited"/>
      <enumeration value="serverTransferProhibited"/>
      <enumeration value="serverUpdateProhibited"/>
    </restriction>
   </simpleType>

   <!--
   Pending action notification response elements.
   -->
   <complexType name="panDataType">
    <sequence>
      <element name="name" type="domain:paNameType"/>
      <element name="paTRID" type="epp:trIDType"/>
      <element name="paDate" type="dateTime"/>



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    </sequence>
   </complexType>

   <complexType name="paNameType">
    <simpleContent>
      <extension base="eppcom:labelType">
        <attribute name="paResult" type="boolean"
         use="required"/>
      </extension>
    </simpleContent>
   </complexType>

   <!--
   <renew> response elements.
   -->
   <complexType name="renDataType">
   <sequence>
    <element name="name" type="eppcom:labelType"/>
    <element name="exDate" type="dateTime"
     minOccurs="0"/>
   </sequence>
   </complexType>

   <!--
   <transfer> response elements.
   -->
   <complexType name="trnDataType">
   <sequence>
    <element name="name" type="eppcom:labelType"/>
    <element name="trStatus" type="eppcom:trStatusType"/>
    <element name="reID" type="eppcom:clIDType"/>
    <element name="reDate" type="dateTime"/>
    <element name="acID" type="eppcom:clIDType"/>
    <element name="acDate" type="dateTime"/>
    <element name="exDate" type="dateTime"
     minOccurs="0"/>
   </sequence>
   </complexType>

   <!--
   End of schema.
   -->
   </schema>
   END







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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 <?xml?> 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
   [W3C.REC-xmlschema-2-20041028] 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
   [RFC0952] 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.


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



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   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 [I-D.hollenbeck-epp-rfc3730bis] 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.

   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

   [I-D.hollenbeck-epp-rfc3730bis]
              Hollenbeck, S., "Extensible Provisioning Protocol (EPP)",
              draft-hollenbeck-epp-rfc3730bis-04 (work in progress),
              November 2006.




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   [I-D.hollenbeck-epp-rfc3732bis]
              Hollenbeck, S., "Extensible Provisioning Protocol (EPP)
              Host Mapping", draft-hollenbeck-epp-rfc3732bis-04 (work in
              progress), November 2006.

   [I-D.hollenbeck-epp-rfc3733bis]
              Hollenbeck, S., "Extensible Provisioning Protocol (EPP)
              Contact Mapping", draft-hollenbeck-epp-rfc3733bis-05 (work
              in progress), November 2006.

   [RFC0952]  Harrenstien, K., Stahl, M., and E. Feinler, "DoD Internet
              host table specification", RFC 952, October 1985.

   [RFC1123]  Braden, R., "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.

   [RFC3688]  Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
              January 2004.

   [W3C.REC-xml-20040204]
              Paoli, J., Maler, E., Sperberg-McQueen, C., Bray, T., and
              F. Yergeau, "Extensible Markup Language (XML) 1.0 (Third
              Edition)", World Wide Web Consortium Recommendation REC-
              xml-20040204, February 2004,
              <http://www.w3.org/TR/2004/REC-xml-20040204>.

   [W3C.REC-xmlschema-1-20041028]
              Beech, D., Thompson, H., 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>.

   [W3C.REC-xmlschema-2-20041028]
              Biron, P. and A. Malhotra, "XML Schema Part 2: Datatypes
              Second Edition", World Wide Web Consortium
              Recommendation REC-xmlschema-2-20041028, October 2004,
              <http://www.w3.org/TR/2004/REC-xmlschema-2-20041028>.

9.2.  Informative References

   [RFC2781]  Hoffman, P. and F. Yergeau, "UTF-16, an encoding of ISO
              10646", RFC 2781, February 2000.

   [RFC3490]  Faltstrom, P., Hoffman, P., and A. Costello,



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              "Internationalizing Domain Names in Applications (IDNA)",
              RFC 3490, March 2003.

   [RFC3731]  Hollenbeck, S., "Extensible Provisioning Protocol (EPP)
              Domain Name Mapping", RFC 3731, March 2004.


Appendix A.  Changes from RFC 3731

   1.  Minor reformatting as a result of converting I-D source format
       from nroff to XML.

   2.  Removed this text from Section 2.3:

       "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
       <transfer> command to approve, reject, or cancel a transfer MAY
       be processed while an object is in "pendingTransfer" status."

   3.  Changed text in Section 3.1.3 from "A <domain:acID> element that
       contains the identifier of the client that SHOULD act upon the
       transfer request" to "A <domain:acID> element that contains the
       identifier of the client that SHOULD act upon a PENDING transfer
       request.  For all other status types, the value identifies the
       client that took the indicated action".

   4.  Changed text in Section 3.2.1.4 from "At least one <domain:add>,
       <domain:rem>, or <domain:chg> element MUST be provided." to "At
       least one <domain:add>, <domain:rem>, or <domain:chg> element
       MUST be provided if the command is not being extended.  All of
       these elements MAY be omitted if an <update> extension is
       present.".

   5.  Renumbered old section 3.2.6 to new section 3.3.

   6.  Changed text in Section 3.3 (old Section 3.2.6) from this:

       "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 <poll> command."

       to this:

       "The server operator reviews the request offline, and informs the
       client of the outcome of the review by either queuing a service
       message for retrieval via the <poll> command or by using an out-
       of-band mechanism to inform the client of the request."



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   7.  Removed text describing use of the XML Schema schemaLocation
       attribute.  This is an optional attribute that doesn't need to be
       mandated for use in EPP.

   8.  Removed references to RFC 3339 and replaced them with references
       to the W3C XML Schema specification.

   9.  Updated EPP and XML references.


Author's Address

   Scott Hollenbeck
   VeriSign, Inc.
   21345 Ridgetop Circle
   Dulles, VA  20166-6503
   US

   Email: shollenbeck@verisign.com
































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