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    Network Working Group                                           J. Gould
    Internet-Draft                                            VeriSign, Inc.
    Intended status: Standards Track                                 T. Tran
    Expires: March 3, 2016                                           Neustar
                                                             August 31, 2015

      Change Poll Extension for the Extensible Provisioning Protocol (EPP)
                           draft-gould-change-poll-03

    Abstract

       This document describes an Extensible Provisioning Protocol (EPP)
       extension for notifying clients of operations on client sponsored
       objects that were not initiated by the client through EPP.  These
       operations MAY include contractual or policy requirements including
       but not limited to regular batch processes, customer support actions,
       Uniform Domain-Name Dispute-Resolution Policy (UDRP) or Uniform Rapid
       Suspension (URS) actions, court directed actions, and bulk updates
       based on customer requests.  Since the client is not directly
       involved or knowledgable of these operations, the extension is used
       along with an EPP object mapping to provide the resulting state of
       the post-operation object, and optionally a pre-operation object,
       with the operation meta-data of what, when, who, and why.

    Status of This Memo

       This Internet-Draft is submitted in full conformance with the
       provisions of BCP 78 and BCP 79.

       Internet-Drafts are working documents of the Internet Engineering
       Task Force (IETF).  Note that other groups may also distribute
       working documents as Internet-Drafts.  The list of current Internet-
       Drafts is at http://datatracker.ietf.org/drafts/current/.

       Internet-Drafts are draft documents valid for a maximum of six months
       and may be updated, replaced, or obsoleted by other documents at any
       time.  It is inappropriate to use Internet-Drafts as reference
       material or to cite them other than as "work in progress."

       This Internet-Draft will expire on March 3, 2016.

    Copyright Notice

       Copyright (c) 2015 IETF Trust and the persons identified as the
       document authors.  All rights reserved.

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       This document is subject to BCP 78 and the IETF Trust's Legal
       Provisions Relating to IETF Documents
       (http://trustee.ietf.org/license-info) in effect on the date of
       publication of this document.  Please review these documents
       carefully, as they describe your rights and restrictions with respect
       to this document.  Code Components extracted from this document must
       include Simplified BSD License text as described in Section 4.e of
       the Trust Legal Provisions and are provided without warranty as
       described in the Simplified BSD License.

    Table of Contents

       1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
         1.1.  Conventions Used in This Document . . . . . . . . . . . .   3
       2.  Object Attributes . . . . . . . . . . . . . . . . . . . . . .   3
         2.1.  Operation . . . . . . . . . . . . . . . . . . . . . . . .   3
         2.2.  Who . . . . . . . . . . . . . . . . . . . . . . . . . . .   4
       3.  EPP Command Mapping . . . . . . . . . . . . . . . . . . . . .   4
         3.1.  EPP Query Commands  . . . . . . . . . . . . . . . . . . .   4
           3.1.1.  EPP <check> Command . . . . . . . . . . . . . . . . .   5
           3.1.2.  EPP <info> Command  . . . . . . . . . . . . . . . . .   5
           3.1.3.  EPP <transfer> Command  . . . . . . . . . . . . . . .  15
         3.2.  EPP Transform Commands  . . . . . . . . . . . . . . . . .  15
           3.2.1.  EPP <create> Command  . . . . . . . . . . . . . . . .  15
           3.2.2.  EPP <delete> Command  . . . . . . . . . . . . . . . .  15
           3.2.3.  EPP <renew> Command . . . . . . . . . . . . . . . . .  15
           3.2.4.  EPP <transfer> Command  . . . . . . . . . . . . . . .  15
           3.2.5.  EPP <update> Command  . . . . . . . . . . . . . . . .  15
       4.  Formal Syntax . . . . . . . . . . . . . . . . . . . . . . . .  15
         4.1.  Change Poll Extension Schema  . . . . . . . . . . . . . .  16
       5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  18
         5.1.  XML Namespace . . . . . . . . . . . . . . . . . . . . . .  18
         5.2.  EPP Extension Registry  . . . . . . . . . . . . . . . . .  19
       6.  Security Considerations . . . . . . . . . . . . . . . . . . .  19
       7.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  19
       8.  Normative References  . . . . . . . . . . . . . . . . . . . .  19
       Appendix A.  Change History . . . . . . . . . . . . . . . . . . .  20
         A.1.  Change from 00 to 01  . . . . . . . . . . . . . . . . . .  20
         A.2.  Change from 01 to 02  . . . . . . . . . . . . . . . . . .  20
         A.3.  Change from 02 to 03  . . . . . . . . . . . . . . . . . .  20
       Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  20

    1.  Introduction

       This document describes an extension mapping for version 1.0 of the
       Extensible Provisioning Protocol (EPP) [RFC5730].  This mapping, an
       extension to EPP object mappings like the EPP domain name mapping
       [RFC5731], is used to notify clients of operations they are not

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       directly involved in, on objects that the client sponsors.  It is up
       to server policy to determine what transform operations and clients
       to notify.  Using this extension clients can more easily keep their
       systems in-sync with the objects stored in the server.  When a change
       occurs that a client needs to be notified of, a poll message can be
       inserted by the server for consumption by the client using the EPP
       <poll> command and response defined in [RFC5730].  The extension
       supports including a "before" operation poll message and an "after"
       operation poll message.

    1.1.  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 RFC 2119 [RFC2119].

       XML is case sensitive.  Unless stated otherwise, XML specifications
       and examples provided in this document MUST be interpreted in the
       character case presented in order to develop a conforming
       implementation.

       In examples, "C:" represents lines sent by a protocol client and "S:"
       represents lines returned by a protocol server.  Indentation and
       white space in examples are provided only to illustrate element
       relationships and are not a REQUIRED feature of this protocol.

       "changePoll-1.0" is used as an abbreviation for
       "urn:ietf:params:xml:ns:changePoll-1.0".  The XML namespace prefix
       "changePoll" is used, but implementations MUST NOT depend on it and
       instead employ a proper namespace-aware XML parser and serializer to
       interpret and output the XML documents.

    2.  Object Attributes

       This extension adds additional elements to EPP object mappings like
       the EPP domain name mapping [RFC5731].  Only those new elements are
       described here.

    2.1.  Operation

       An operation consists of any transform operation that impacts objects
       that the client sponsers and SHOULD be notified of.  The
       <changePoll:operation> element defines the operation.  The OPTIONAL
       "op" attribute is used to define a sub-operation or the name of a
       "custom" operation.  The enumerated list of <changePoll:operation>
       values include:

       "create"  Create operation as defined in [RFC5730].

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       "delete"  Delete operation as defined in [RFC5730].  If the delete
           operation results in an immediate purge of the object, then the
           "op" attribute MUST be set to "purge".
       "renew"  Renew operation as defined in [RFC5730].
       "transfer"  Transfer operation as defined in [RFC5730] with the
           OPTIONAL "op" attribute defining the transfer type with the
           possible values of "request", "approve", "cancel", and "reject".
       "update"  Update operation as defined in [RFC5730].
       "restore"  Restore operation as defined in [RFC3915] with the
           OPTIONAL "op" attribute defining the restore type with the
           possible values of "request" and "report".
       "autoRenew"  Auto renew operation executed by the server.
       "autoDelete"  Auto delete operation executed by the server.  If the
           "autoDelete" operation results in an immediate purge of the
           object, then the "op" attribute MUST be set to "purge".
       "autoPurge"  Auto purge operation executed by the server when
           removing the object after it had the "pendingDelete" status.
       "custom"  Custom operation that uses the "op" attribute to define the
           custom operation name.

    2.2.  Who

       Who defines who executed the operation for audit purposes, and is
       represented using the <changePoll:who> element.  The scheme used for
       the possible set of Who values is up to server policy.  The server
       MAY identify Who based on:

       "Identifier"  Unique user identifier of the user that executed the
           operation.  An example is "ClientX".
       "Name"  Name of the user that executed the operation.  An example is
           "John Doe".
       "Role"  Role of the user that executed operation.  An example is
           "CSR" for a Customer Support Representative or "Batch" for a
           server batch.

    3.  EPP Command Mapping

       A detailed description of the EPP syntax and semantics can be found
       in the EPP core protocol specification [RFC5730].

    3.1.  EPP Query Commands

       EPP provides three commands to retrieve object information: <check>
       to determine if an object is known to the server, <info> to retrieve
       detailed information associated with an object, and <transfer> to
       retrieve object transfer status information.

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    3.1.1.  EPP <check> Command

       This extension does not add any elements to the EPP <check> command
       or <check> response described in the [RFC5730].

    3.1.2.  EPP <info> Command

       This extension does not add any elements to the EPP <info> command
       described in the [RFC5730].

       This extension adds transaction detail of the operations to the EPP
       <info> poll response, as described in [RFC5730], of an EPP Object
       Mapping like [RFC5731].  Any transform operation to an object defined
       in an EPP Object Mapping, by a client other than the sponsoring
       client, MAY result in extending the <info> response of the object for
       inserting an EPP poll message with the operation detail.  The
       sponsoring client will then receive the state of the object with
       operation detail like what, who, when, and why the object was
       changed.  The <changePoll:changeData> element contains the operation
       detail along with an indication of whether the object reflects the
       state before or after the operation, using the OPTIONAL "state"
       attribute, with the possible values of "before" or "after", and with
       a default value of "after".  The "state" attribute describes the
       state of the response data or <resData> block returned in the poll
       response.  The server MAY support providing the "before" state and
       "after" state to the operation, by using one poll message for the
       "before" state and one poll message for the "after" state.  When
       using the "before" state poll message, it MUST be inserted prior to
       the "after" state poll message.  The <changePoll:changeData> element
       includes the operation detail with the following child elements:

       <changePoll:operation>  Transform operation executed on the object as
           defined in Section 2.1.
       <changePoll:date>  Date and time when the operation was executed.
       <changePoll:svTRID>  Server transaction identifier of the operation.
       <changePoll:who>  Who executed the operation as defined in
           Section 2.2.
       <changePoll:caseId>  OPTIONAL case identifer associated with the
           operation.  The required "type" attribute defines the type of
           case with an enumerated list of case types including:

           udrp  a Uniform Domain-Name Dispute-Resolution Policy (UDRP)
               case.
           urs a Uniform Rapid Suspension (URS) case.
           custom  A custom case that is defined using the "name" attribute.
       <changePoll:reason>  OPTIONAL reason for executing the operation.  If
           present, this element contains the server-specific text to help

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           explain the reason the operation was executed.  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).

       Example poll <info> response with the <changePoll:changeData>
       extension for a URS lock transaction on the domain.example domain
       name, with the "before" state.  The "before" state is reflected in
       the <resData> block:

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       S:<?xml version="1.0" encoding="UTF-8"?>
       S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
       S:   <response>
       S:      <result code="1301">
       S:         <msg lang="en-US">
       S:       Command completed successfully; ack to dequeue</msg>
       S:      </result>
       S:      <msgQ id="201" count="1">
       S:         <qDate>2013-10-22T14:25:57.0Z</qDate>
       S:         <msg>Registry initiated update of domain.</msg>
       S:      </msgQ>
       S:    <resData>
       S:      <domain:infData
       S:       xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
       S:        <domain:name>domain.example</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:clID>ClientX</domain:clID>
       S:        <domain:crID>ClientY</domain:crID>
       S:        <domain:crDate>2012-04-03T22:00:00.0Z</domain:crDate>
       S:        <domain:exDate>2014-04-03T22:00:00.0Z</domain:exDate>
       S:      </domain:infData>
       S:    </resData>
       S:    <extension>
       S:      <changePoll:changeData
       S:        xmlns:changePoll="urn:ietf:params:xml:ns:changePoll-1.0"
       S:        state="before">
       S:        <changePoll:operation>update</changePoll:operation>
       S:        <changePoll:date>2013-10-22T14:25:57.0Z</changePoll:date>
       S:        <changePoll:svTRID>12345-XYZ</changePoll:svTRID>
       S:        <changePoll:who>URS Admin</changePoll:who>
       S:        <changePoll:caseId type="urs">urs123</changePoll:caseId>
       S:        <changePoll:reason>URS Lock</changePoll:reason>
       S:      </changePoll:changeData>
       S:    </extension>
       S:    <trID>
       S:      <clTRID>ABC-12345</clTRID>
       S:      <svTRID>54321-XYZ</svTRID>
       S:    </trID>
       S:   </response>
       S:</epp>

       Example poll <info> response with the <changePoll:changeData>
       extension for a URS lock transaction on the domain.example domain
       name, with the "after" state.  The "after" state is reflected in the

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       <resData> block:

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       S:<?xml version="1.0" encoding="UTF-8"?>
       S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
       S:   <response>
       S:      <result code="1301">
       S:         <msg lang="en-US">
       S:       Command completed successfully; ack to dequeue</msg>
       S:      </result>
       S:      <msgQ id="202" count="1">
       S:         <qDate>2013-10-22T14:25:57.0Z</qDate>
       S:         <msg>Registry initiated update of domain.</msg>
       S:      </msgQ>
       S:    <resData>
       S:      <domain:infData
       S:       xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
       S:        <domain:name>domain.example</domain:name>
       S:        <domain:roid>EXAMPLE1-REP</domain:roid>
       S:        <domain:status s="serverUpdateProhibited"/>
       S:        <domain:status s="serverDeleteProhibited"/>
       S:        <domain:status s="serverTransferProhibited"/>
       S:        <domain:registrant>jd1234</domain:registrant>
       S:        <domain:contact type="admin">sh8013</domain:contact>
       S:        <domain:contact type="tech">sh8013</domain:contact>
       S:        <domain:clID>ClientX</domain:clID>
       S:        <domain:crID>ClientY</domain:crID>
       S:        <domain:crDate>2012-04-03T22:00:00.0Z</domain:crDate>
       S:        <domain:upID>ClientZ</domain:upID>
       S:        <domain:upDate>2013-10-22T14:25:57.0Z</domain:upDate>
       S:        <domain:exDate>2014-04-03T22:00:00.0Z</domain:exDate>
       S:      </domain:infData>
       S:    </resData>
       S:    <extension>
       S:      <changePoll:changeData
       S:        xmlns:changePoll="urn:ietf:params:xml:ns:changePoll-1.0"
       S:        state="after">
       S:        <changePoll:operation>update</changePoll:operation>
       S:        <changePoll:date>2013-10-22T14:25:57.0Z</changePoll:date>
       S:        <changePoll:svTRID>12345-XYZ</changePoll:svTRID>
       S:        <changePoll:who>URS Admin</changePoll:who>
       S:        <changePoll:caseId type="urs">urs123</changePoll:caseId>
       S:        <changePoll:reason>URS Lock</changePoll:reason>
       S:      </changePoll:changeData>
       S:    </extension>
       S:    <trID>
       S:      <clTRID>ABC-12345</clTRID>
       S:      <svTRID>54321-XYZ</svTRID>
       S:    </trID>
       S:   </response>
       S:</epp>

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       Example poll <info> response with the <changePoll:changeData>
       extension for a custom "sync" operation on the domain.example domain
       name, with the default "after" state.  The "after" state is reflected
       in the <resData> block:

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       S:<?xml version="1.0" encoding="UTF-8"?>
       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 id="201" count="1">
       S:         <qDate>2013-10-22T14:25:57.0Z</qDate>
       S:    <msg>Registry initiated Sync of Domain Expiration Date</msg>
       S:      </msgQ>
       S:    <resData>
       S:      <domain:infData
       S:       xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
       S:        <domain:name>domain.example</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:clID>ClientX</domain:clID>
       S:        <domain:crID>ClientY</domain:crID>
       S:        <domain:crDate>2012-04-03T22:00:00.0Z</domain:crDate>
       S:        <domain:upID>ClientZ</domain:upID>
       S:        <domain:upDate>2013-10-22T14:25:57.0Z</domain:upDate>
       S:        <domain:exDate>2014-04-03T22:00:00.0Z</domain:exDate>
       S:      </domain:infData>
       S:    </resData>
       S:    <extension>
       S:      <changePoll:changeData
       S:        xmlns:changePoll="urn:ietf:params:xml:ns:changePoll-1.0">
       S:        <changePoll:operation op="sync">custom
       S:        </changePoll:operation>
       S:        <changePoll:date>2013-10-22T14:25:57.0Z</changePoll:date>
       S:        <changePoll:svTRID>12345-XYZ</changePoll:svTRID>
       S:        <changePoll:who>CSR</changePoll:who>
       S:        <changePoll:reason lang="en">Customer sync request
       S:        </changePoll:reason>
       S:      </changePoll:changeData>
       S:    </extension>
       S:    <trID>
       S:      <clTRID>ABC-12345</clTRID>
       S:      <svTRID>54321-XYZ</svTRID>
       S:    </trID>
       S:   </response>
       S:</epp>

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       Example poll <info> response with the <changePoll:changeData>
       extension for a "delete" operation on the domain.example domain name
       that is immediately purged, with the default "after" state.  The
       "after" state is reflected in the <resData> block:

       S:<?xml version="1.0" encoding="UTF-8"?>
       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 id="200" count="1">
       S:         <qDate>2013-10-22T14:25:57.0Z</qDate>
       S:         <msg>Registry initiated delete of
       S:         domain resulting in immediate purge.</msg>
       S:      </msgQ>
       S:      <resData>
       S:        <domain:infData
       S:          xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
       S:          <domain:name>domain.example</domain:name>
       S:          <domain:roid>EXAMPLE1-REP</domain:roid>
       S:          <domain:clID>ClientX</domain:clID>
       S:        </domain:infData>
       S:      </resData>
       S:      <extension>
       S:        <changePoll:changeData
       S:          xmlns:changePoll="urn:ietf:params:xml:ns:changePoll-1.0">
       S:          <changePoll:operation op="purge">
       S:            delete</changePoll:operation>
       S:          <changePoll:date>2013-10-22T14:25:57.0Z</changePoll:date>
       S:          <changePoll:svTRID>12345-XYZ</changePoll:svTRID>
       S:          <changePoll:who>ClientZ</changePoll:who>
       S:          <changePoll:reason>Court order</changePoll:reason>
       S:        </changePoll:changeData>
       S:      </extension>
       S:      <trID>
       S:         <clTRID>ABC-12345</clTRID>
       S:         <svTRID>54321-XYZ</svTRID>
       S:      </trID>
       S:   </response>
       S:</epp>

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       Example poll <info> response with the <changePoll:changeData>
       extension for an "autoPurge" operation on the domain.example domain
       name that previously had the "pendingDelete" status, with the default
       "after" state.  The "after" state is reflected in the <resData>
       block:

       S:<?xml version="1.0" encoding="UTF-8"?>
       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 id="200" count="1">
       S:         <qDate>2013-10-22T14:25:57.0Z</qDate>
       S:    <msg>Registry purged domain with pendingDelete status.</msg>
       S:      </msgQ>
       S:      <resData>
       S:        <domain:infData
       S:          xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
       S:          <domain:name>domain.example</domain:name>
       S:          <domain:roid>EXAMPLE1-REP</domain:roid>
       S:          <domain:clID>ClientX</domain:clID>
       S:        </domain:infData>
       S:      </resData>
       S:      <extension>
       S:        <changePoll:changeData
       S:          xmlns:changePoll="urn:ietf:params:xml:ns:changePoll-1.0">
       S:          <changePoll:operation>
       S:            autoPurge</changePoll:operation>
       S:          <changePoll:date>2013-10-22T14:25:57.0Z</changePoll:date>
       S:          <changePoll:svTRID>12345-XYZ</changePoll:svTRID>
       S:          <changePoll:who>Batch</changePoll:who>
       S:          <changePoll:reason>
       S:            Past pendingDelete 5 day period
       S:          </changePoll:reason>
       S:        </changePoll:changeData>
       S:      </extension>
       S:      <trID>
       S:         <clTRID>ABC-12345</clTRID>
       S:         <svTRID>54321-XYZ</svTRID>
       S:      </trID>
       S:   </response>
       S:</epp>

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       Example poll <info> response with the <changePoll:changeData>
       extension for an "update" operation on the ns1.domain.example host,
       with the default "after" state.  The "after" state is reflected in
       the <resData> block:

       S:<?xml version="1.0" encoding="UTF-8"?>
       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 id="201" count="1">
       S:         <qDate>2013-10-22T14:25:57.0Z</qDate>
       S:         <msg>Registry initiated update of host.</msg>
       S:      </msgQ>
       S:    <resData>
       S:      <host:infData
       S:       xmlns:host="urn:ietf:params:xml:ns:host-1.0">
       S:        <host:name>ns1.domain.example</host:name>
       S:        <host:roid>NS1_EXAMPLE1-REP</host:roid>
       S:        <host:status s="linked"/>
       S:        <host:status s="serverUpdateProhibited"/>
       S:        <host:status s="serverDeleteProhibited"/>
       S:        <host:addr ip="v4">192.0.2.2</host:addr>
       S:        <host:addr ip="v6">1080:0:0:0:8:800:200C:417A</host:addr>
       S:        <host:clID>ClientX</host:clID>
       S:        <host:crID>ClientY</host:crID>
       S:        <host:crDate>2012-04-03T22:00:00.0Z</host:crDate>
       S:        <host:upID>ClientY</host:upID>
       S:        <host:upDate>2013-10-22T14:25:57.0Z</host:upDate>
       S:      </host:infData>
       S:    </resData>
       S:    <extension>
       S:      <changePoll:changeData
       S:        xmlns:changePoll="urn:ietf:params:xml:ns:changePoll-1.0">
       S:        <changePoll:operation>update</changePoll:operation>
       S:        <changePoll:date>2013-10-22T14:25:57.0Z</changePoll:date>
       S:        <changePoll:svTRID>12345-XYZ</changePoll:svTRID>
       S:        <changePoll:who>ClientZ</changePoll:who>
       S:        <changePoll:reason>Host Lock</changePoll:reason>
       S:      </changePoll:changeData>
       S:    </extension>
       S:    <trID>
       S:      <clTRID>ABC-12345</clTRID>
       S:      <svTRID>54321-XYZ</svTRID>
       S:    </trID>
       S:   </response>
       S:</epp>

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    3.1.3.  EPP <transfer> Command

       This extension does not add any elements to the EPP <transfer> query
       command or <transfer> response described in the [RFC5730].

    3.2.  EPP Transform Commands

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

    3.2.1.  EPP <create> Command

       This extension does not add any elements to the EPP <create> command
       or <create> response described in the [RFC5730].

    3.2.2.  EPP <delete> Command

       This extension does not add any elements to the EPP <delete> command
       or <delete> response described in the [RFC5730].

    3.2.3.  EPP <renew> Command

       This extension does not add any elements to the EPP <renew> command
       or <renew> response described in the [RFC5730].

    3.2.4.  EPP <transfer> Command

       This extension does not add any elements to the EPP <transfer>
       command or <transfer> response described in the [RFC5730].

    3.2.5.  EPP <update> Command

       This extension does not add any elements to the EPP <update> command
       or <update> response described in the [RFC5730].

    4.  Formal Syntax

       One schema is presented here that is the EPP Change Poll Extension
       schema.

       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.

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    4.1.  Change Poll Extension Schema

       BEGIN
       <?xml version="1.0" encoding="UTF-8"?>
        <schema targetNamespace="urn:ietf:params:xml:ns:changePoll-1.0"
                xmlns:eppcom="urn:ietf:params:xml:ns:eppcom-1.0"
                xmlns:epp="urn:ietf:params:xml:ns:epp-1.0"
                xmlns:changePoll="urn:ietf:params:xml:ns:changePoll-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"/>

          <annotation>
            <documentation>
              Extensible Provisioning Protocol v1.0
              Change Poll Mapping Schema.
            </documentation>
          </annotation>

          <!--
           Change element.
          -->
          <element name="changeData" type="changePoll:changeDataType"/>

          <!--
           Attributes associated with the change.
          -->
          <complexType name="changeDataType">
            <sequence>
              <element name="operation" type="changePoll:operationType"/>
              <element name="date" type="dateTime"/>
              <element name="svTRID" type="epp:trIDStringType"/>
              <element name="who" type="changePoll:whoType"/>
              <element name="caseId" type="changePoll:caseIdType"
                minOccurs="0"/>
              <element name="reason" type="eppcom:reasonType"
                minOccurs="0"/>
            </sequence>
           <attribute name="state" type="changePoll:stateType"
             default="after"/>
          </complexType>

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          <!--
           Enumerated list of operations, with extensibility via "custom".
          -->
          <simpleType name="operationEnum">
            <restriction base="token">
              <enumeration value="create"/>
              <enumeration value="delete"/>
              <enumeration value="renew"/>
              <enumeration value="transfer"/>
              <enumeration value="update"/>
              <enumeration value="restore"/>
              <enumeration value="autoRenew"/>
              <enumeration value="autoDelete"/>
              <enumeration value="autoPurge"/>
              <enumeration value="custom"/>
            </restriction>
          </simpleType>

          <!--
           Enumerated of state of the object in the poll message.
          -->
          <simpleType name="stateType">
            <restriction base="token">
              <enumeration value="before"/>
              <enumeration value="after"/>
            </restriction>
          </simpleType>

          <!--
           Transform operation type
          -->
         <complexType name="operationType">
           <simpleContent>
             <extension base="changePoll:operationEnum">
               <attribute name="op" type="token"/>
             </extension>
           </simpleContent>
         </complexType>

          <!--
           Case identifier type
          -->
         <complexType name="caseIdType">
           <simpleContent>
             <extension base="token">
               <attribute name="type" type="changePoll:caseTypeEnum"
                 use="required"/>
               <attribute name="name" type="token"

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                 use="optional"/>
             </extension>
           </simpleContent>
         </complexType>

          <!--
           Enumerated list of case identifier types
          -->
          <simpleType name="caseTypeEnum">
            <restriction base="token">
              <enumeration value="udrp"/>
              <enumeration value="urs"/>
              <enumeration value="custom"/>
            </restriction>
          </simpleType>

          <!--
           Who type
          -->
         <simpleType name="whoType">
           <restriction base="normalizedString">
             <minLength value="1"/>
             <maxLength value="255"/>
           </restriction>
         </simpleType>

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

    5.  IANA Considerations

    5.1.  XML Namespace

       This document uses URNs to describe XML namespaces and XML schemas
       conforming to a registry mechanism described in [RFC3688].  The
       following URI assignment is requested of IANA:

       URI: urn:ietf:params:xml:ns:changePoll-1.0

       Registrant Contact: See the "Author's Address" section of this
       document.

       XML: See the "Formal Syntax" section of this document.

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    5.2.  EPP Extension Registry

       The EPP extension described in this document should be registered by
       the IANA in the EPP Extension Registry described in [RFC7451].  The
       details of the registration are as follows:

       Name of Extension: "Change Poll Extension for the Extensible
       Provisioning Protocol (EPP)"

       Document status: Standards Track

       Reference: (insert reference to RFC version of this document)

       Registrant Name and Email Address: IESG, <iesg@ietf.org>

       TLDs: Any

       IPR Disclosure: None

       Status: Active

       Notes: None

    6.  Security Considerations

       The mapping extensions described in this document do not provide any
       security services beyond those described by EPP [RFC5730] and
       protocol layers used by EPP.  The security considerations described
       in these other specifications apply to this specification as well.

    7.  Acknowledgements

       Special suggestions that have been incorporated into this document
       were provided by Michael Holloway.

    8.  Normative References

       [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.

       [RFC3915]  Hollenbeck, S., "Domain Registry Grace Period Mapping for
                  the Extensible Provisioning Protocol (EPP)", RFC 3915,
                  September 2004.

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       [RFC5730]  Hollenbeck, S., "Extensible Provisioning Protocol (EPP)",
                  STD 69, RFC 5730, August 2009.

       [RFC5731]  Hollenbeck, S., "Extensible Provisioning Protocol (EPP)
                  Domain Name Mapping", STD 69, RFC 5731, August 2009.

       [RFC7451]  Hollenbeck, S., "Extension Registry for the Extensible
                  Provisioning Protocol", RFC 7451, February 2015.

    Appendix A.  Change History

    A.1.  Change from 00 to 01

       1.  Added an optional caseId element that defines the case identifier
           from UDRP, URS, or custom case, based on feedback from Michael
           Holloway.

    A.2.  Change from 01 to 02

       1.  Amended XML Namespace section of IANA Considerations, added EPP
           Extension Registry section.
       2.  Moved Change History to the back section as an Appendix.

    A.3.  Change from 02 to 03

       1.  Fixed "before" state example to use the "before" state value
           based on feedback from Patrick Mevzek.

    Authors' Addresses

       James Gould
       VeriSign, Inc.
       12061 Bluemont Way
       Reston, VA  20190
       US

       Email: jgould@verisign.com
       URI:   http://www.verisigninc.com

       Trung Tran
       Neustar
       21575 Ridgetop Circle
       Sterling, VA  20166
       US

       Email: Trung.Tran@neustar.biz
       URI:   http://www.neustar.biz

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