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Versions: (draft-carney-regext-validate) 00 01 02 03 04

    Registration Protocols Extensions                              R. Carney
    Internet-Draft                                                J. Snitker
    Intended status: Standards Track                            GoDaddy Inc.
    Expires: April 14, 2019                                 October 11, 2018

        Validate Mapping for the Extensible Provisioning Protocol (EPP)
                         draft-ietf-regext-validate-04

    Abstract

       This document describes an Extensible Provisioning Protocol (EPP)
       mapping for the validation of contact and eligibility data.

    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 https://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 April 14, 2019.

    Copyright Notice

       Copyright (c) 2018 IETF Trust and the persons identified as the
       document authors.  All rights reserved.

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

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    Table of Contents

       1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
         1.1.  Conventions Used in This Document . . . . . . . . . . . .   3
       2.  Object Attributes . . . . . . . . . . . . . . . . . . . . . .   3
         2.1.  Key Value . . . . . . . . . . . . . . . . . . . . . . . .   3
         2.2.  Validate Id . . . . . . . . . . . . . . . . . . . . . . .   4
         2.3.  Validate PostalInfo, Voice, Fax, Email, AuthInfo  . . . .   4
       3.  EPP Command Mapping . . . . . . . . . . . . . . . . . . . . .   4
         3.1.  EPP Query Commands  . . . . . . . . . . . . . . . . . . .   4
           3.1.1.  EPP <check> Command . . . . . . . . . . . . . . . . .   4
           3.1.2.  EPP <info> Command  . . . . . . . . . . . . . . . . .   8
           3.1.3.  EPP <transfer> Command  . . . . . . . . . . . . . . .   8
         3.2.  EPP Transform Commands  . . . . . . . . . . . . . . . . .   9
           3.2.1.  EPP <create> Command  . . . . . . . . . . . . . . . .   9
           3.2.2.  EPP <delete> Command  . . . . . . . . . . . . . . . .   9
           3.2.3.  EPP <renew> Command . . . . . . . . . . . . . . . . .   9
           3.2.4.  EPP <transfer> Command  . . . . . . . . . . . . . . .   9
           3.2.5.  EPP <update> Command  . . . . . . . . . . . . . . . .   9
       4.  Formal Syntax . . . . . . . . . . . . . . . . . . . . . . . .   9
         4.1.  Validate Schema . . . . . . . . . . . . . . . . . . . . .   9
       5.  Security Considerations . . . . . . . . . . . . . . . . . . .  13
       6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  13
         6.1.  XML Namespace . . . . . . . . . . . . . . . . . . . . . .  13
       7.  Implemntation Status  . . . . . . . . . . . . . . . . . . . .  13
         7.1.  To Be Filled In . . . . . . . . . . . . . . . . . . . . .  14
       8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  14
       9.  Change History  . . . . . . . . . . . . . . . . . . . . . . .  14
         9.1.  Change from 03 to 04  . . . . . . . . . . . . . . . . . .  14
         9.2.  Change from 02 to 03  . . . . . . . . . . . . . . . . . .  14
         9.3.  Change from 01 to 02  . . . . . . . . . . . . . . . . . .  14
         9.4.  Change from 00 to 01  . . . . . . . . . . . . . . . . . .  14
         9.5.  Change from carney-regext 01 to ietf-regext 00  . . . . .  15
       10. Normative References  . . . . . . . . . . . . . . . . . . . .  15
       Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  15

    1.  Introduction

       This document describes a Validate mapping for version 1.0 of the
       Extensible Provisioning Protocol (EPP) [RFC5730].  This EPP mapping
       specifies a flexible schema by which EPP clients and servers can
       reliably validate contact and eligibility data.

       With the increased number of restrictions on contacts and required
       data points (license, ids, etc.) to register a domain name, a way to
       validate the data points prior to issuing a transform command is
       becoming more important.

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    1.1.  Conventions Used in This Document

       The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
       "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
       "OPTIONAL" in this document are to be interpreted as described in BCP
       14 [RFC2119] [RFC8174] when, and only when, they appear in all
       capitals, as shown here.

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

       "validate" is used as an abbreviation for
       "urn:ietf:params:xml:ns:validate-0.2".  The XML namespace prefix
       "validate" is used, but implementations MUST NOT depend on it and
       instead employ a proper namespace-aware XML parser and serializer to
       interpret and output the XML documents.

       In 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.

       (Note to RFC Editor: remove the following paragraph before
       publication as an RFC.)

       The XML namespace prefix above contains a version number,
       specifically "0.2".  This version number will increment with
       successive versions of this document, and will reach 1.0 if and when
       this document is published as an RFC.  This permits clients to
       distinguish which version of the extension a server has implemented.

    2.  Object Attributes

       A EPP validation object has attributes and associated values that can
       be viewed by the client.  This section describes each attribute type
       in detail.

    2.1.  Key Value

       Key Value provides a flexible mechanism to share data between the
       client and the server.  The <validate:kv> element defines the data,
       with two required simple attributes, key and value, and an optional
       contactType attribute for specificity in the response, more details
       below.

       o  An example <validate:kv key="VATID" value="0123456789"/>.

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       o  An example <validate:kv contactType="Admin" key="contact:cc"
          value="Invalid country code for admin contact, must be MX."/>.

    2.2.  Validate Id

       The <validate:id> element is used in two different scenarios.

       First if the <validate:id> is passed by itself with no other elements
       (e.g. >validate:postalInfo>) then the client intent is that this is
       an already existing contact and the server should handle the request
       by looking up the associated data in its system and using that data
       to validate against.

       Second scenario would be if the request includes additional elements
       then the server should treat the <validate:id> as a temporary contact
       handle and should not perform a look on the contact but use the data
       that is passed in the request to validate against.

    2.3.  Validate PostalInfo, Voice, Fax, Email, AuthInfo

       These elements are intended to mirror the definitions in [RFC5733].

    3.  EPP Command Mapping

       A detailed description of the EPP syntax and semantics can be found
       in [RFC5730].  The command mappings described here are specifically
       for the Validate Extension.

    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.

    3.1.1.  EPP <check> Command

       The EPP <check> command is used to validate a list of contact
       information.  The <check> command MUST contain a <validate:check>
       element that identifies the validate namespace.  The <validate:check>
       element contains the following child elements:

       o  one or more <validate:contact> element(s) for each contact that is
          to be validated that contains the contact type of the contact to
          be validated.

       The <validate:contact> element has two required attributes:
       contactType, which describes the role (registrant, admin, tech,

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       billing, etc.) of the contact that the contact should be validated
       for; and tld, which provides the top level domain to be validated
       against.  The <validate:contact> element contains the following child
       elements:

       o  one <validate:id> element (as described in section 2.2).
       o  an OPTIONAL <validate:postalInfo> element (as described in section
          2.3).
       o  an OPTIONAL <validate:voice> element (as described in section
          2.3).
       o  an OPTIONAL <validate:fax> element (as described in section 2.3).
       o  an OPTIONAL <validate:email> element (as described in section
          2.3).
       o  an OPTIONAL <validate:authInfo> element (as described in section
          2.3).
       o  zero or more <validate:kv> elements (as described in section 2.1).

       The following is an example <check> command where "sh8013" and
       "sh8014" are both "new" contacts and "sh8012" is an existing contact
       on the server.

       C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
       C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0"
       C:  xmlns:validate="urn:ietf:params:xml:ns:validate-0.2"
       C:  xmlns:contact="urn:ietf:params:xml:ns:contact-1.0">
       C:  <command>
       C:    <check>
       C:      <validate:check>
       C:        <validate:contact contactType="registrant" tld="COM">
       C:          <validate:id>sh8013</validate:id>
       C:          <validate:postalInfo type="int">
       C:            <contact:name>John Doe</contact:name>
       C:            <contact:org>Example Inc.</contact:org>
       C:            <contact:addr>
       C:              <contact:street>123 Example Dr.</contact:street>
       C:              <contact:street>Suite 100</contact:street>
       C:              <contact:city>Dulles</contact:city>
       C:              <contact:sp>VA</contact:sp>
       C:              <contact:pc>20166-6503</contact:pc>
       C:              <contact:cc>US</contact:cc>
       C:            </contact:addr>
       C:          </validate:postalInfo>
       C:          <validate:voice>+1.7035555555</validate:voice>
       C:          <validate:fax>+1.7035555556</validate:fax>
       C:          <validate:email>jdoe@example.com</validate:email>
       C:          <validate:authInfo>
       C:            <contact:pw>2fooBAR</contact:pw>
       C:          </validate:authInfo>

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       C:          <validate:kv key="VAT" value="1234567890"/>
       C:        </validate:contact>
       C:        <validate:contact contactType="tech" tld="COM">
       C:          <validate:id>sh8012</validate:id>
       C:        </validate:contact>
       C:        <validate:contact contactType="admin" tld="COM">
       C:          <validate:id>sh8014</validate:id>
       C:          <validate:postalInfo type="int">
       C:            <contact:name>John Doe</contact:name>
       C:            <contact:org>Example Inc.</contact:org>
       C:            <contact:addr>
       C:              <contact:street>123 Example Dr.</contact:street>
       C:              <contact:street>Suite 100</contact:street>
       C:              <contact:city>Dulles</contact:city>
       C:              <contact:sp>VA</contact:sp>
       C:              <contact:pc>20166-6503</contact:pc>
       C:              <contact:cc>US</contact:cc>
       C:            </contact:addr>
       C:          </validate:postalInfo>
       C:          <validate:voice>+1.7035555555</validate:voice>
       C:          <validate:fax>+1.7035555556</validate:fax>
       C:          <validate:email>jdoe@example.com</validate:email>
       C:          <validate:authInfo>
       C:            <contact:pw>2fooBAR</contact:pw>
       C:          </validate:authInfo>
       C:        </validate:contact>
       C:        <validate:contact contactType="billing" tld="COM">
       C:          <validate:id>sh8014</validate:id>
       C:          <validate:postalInfo type="int">
       C:            <contact:name>John Doe</contact:name>
       C:            <contact:org>Example Inc.</contact:org>
       C:            <contact:addr>
       C:              <contact:street>123 Example Dr.</contact:street>
       C:              <contact:street>Suite 100</contact:street>
       C:              <contact:city>Dulles</contact:city>
       C:              <contact:sp>VA</contact:sp>
       C:              <contact:pc>20166-6503</contact:pc>
       C:              <contact:cc>US</contact:cc>
       C:            </contact:addr>
       C:          </validate:postalInfo>
       C:          <validate:voice>+1.7035555555</validate:voice>
       C:          <validate:fax>+1.7035555556</validate:fax>
       C:          <validate:email>jdoe@example.com</validate:email>
       C:          <validate:authInfo>
       C:            <contact:pw>2fooBAR</contact:pw>
       C:          </validate:authInfo>
       C:        </validate:contact>
       C:      </validate:check>

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       C:    </check>
       C:    <clTRID>ABC-12345</clTRID>
       C:  </command>
       C:</epp>

       When the server receives a <check> command with a <validate:contact>
       element that contains only a <validate:id> element the server will
       process this as an existing contact.  If the contact does not exist
       the server MUST return an EPP error response for that specific
       <validate:contact>.

       When a <check> command has been processed succesfully, the EPP
       <resData> element MUST contain a child <validate:chkData> element
       that identifies the validate namespace.  The <validate:chkData>
       element MUST contain a <validate:cd> element for each
       <validate:check> element contained in the <check> command.  The
       <validate:cd> element contains the following child elements:

       o  one <validate:id> element.
       o  one <validate:response> element.
       o  zero or more <validate:kv> elements.

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       The following is an example of the <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:      <validate:chkData
       S:        xmlns:validate="urn:ietf:params:xml:ns:validate-0.2">
       S:        <validate:cd>
       S:          <validate:id>sh8013</validate:id>
       S:          <validate:response>1000</validate:response>
       S:        </validate:cd>
       S:        <validate:cd>
       S:          <validate:id>sh8014</validate:id>
       S:          <validate:response>2306</validate:response>
       S:          <validate:kv key="contact:city" value="City not valid
       S:            for state."/>
       S:          <validate:kv contactType="Admin" key="contact:cc"
       S:            value="Invalid country code for admin, must be mx."/>
       S:          <validate:kv contactType="Billing" key="VAT" value="VAT
       S:            required for Billing contact."/>
       S:        </validate:cd>
       S:      </validate:chkData>
       S:    </resData>
       S:    <trID>
       S:      <clTRID>ABC-12345</clTRID>
       S:      <svTRID>54321-ZYX</svTRID>
       S:    </trID>
       S:  </response>
       S:</epp>

    3.1.2.  EPP <info> Command

       Info semantics do not apply to validate objects, so there is no
       mapping defined for the EPP <info> command.

    3.1.3.  EPP <transfer> Command

       Transfer semantics do not apply to validate objects, so there is no
       mapping defined for the EPP <transfer> command.

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    3.2.  EPP Transform Commands

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

    3.2.1.  EPP <create> Command

       Create semantics do not apply to validate objects, so there is no
       mapping defined for the EPP <create> command.

    3.2.2.  EPP <delete> Command

       Delete semantics do not apply to validate objects, so there is no
       mapping defined for the EPP <delete> command.

    3.2.3.  EPP <renew> Command

       Renew semantics do not apply to validate objects, so there is no
       mapping defined for the EPP <renew> command.

    3.2.4.  EPP <transfer> Command

       Transfer semantics do not apply to validate objects, so there is no
       mapping defined for the EPP <transfer> command.

    3.2.5.  EPP <update> Command

       Update semantics do not apply to validate objects, so there is no
       mapping defined for the EPP <update> command.

    4.  Formal Syntax

       One schema is presented here that is the EPP Validate 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.

    4.1.  Validate Schema

       Copyright (c) 2018 IETF Trust and the persons identified as authors
       of the code.  All rights reserved.

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       Redistribution and use in source and binary forms, with or without
       modification, are permitted provided that the following conditions
       are met:

       o  Redistributions of source code must retain the above copyright
          notice, this list of conditions and the following disclaimer.
       o  Redistributions in binary form must reproduce the above copyright
          notice, this list of conditions and the following disclaimer in
          the documentation and/or other materials provided with the
          distribution.
       o  Neither the name of Internet Society, IETF or IETF Trust, nor the
          names of specific contributors, may be used to endorse or promote
          products derived from this software without specific prior written
          permission.

       THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
       "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
       LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
       A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
       OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
       SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
       LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
       DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
       THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
       (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
       OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

       BEGIN
       <?xml version="1.0" encoding="UTF-8"?>
       <schema
          targetNamespace="urn:ietf:params:xml:ns:validate-0.2"
          xmlns:validate="urn:ietf:params:xml:ns:validate-0.2"
          xmlns:epp="urn:ietf:params:xml:ns:epp-1.0"
          xmlns:eppcom="urn:ietf:params:xml:ns:eppcom-1.0"
          xmlns:contact="urn:ietf:params:xml:ns:contact-1.0"
          xmlns="http://www.w3.org/2001/XMLSchema"
          elementFormDefault="qualified">

          <annotation>
            <documentation>
              Extensible Provisioning Protocol v1.0
              Validate Object
            </documentation>
          </annotation>

          <!-- Import common element types. -->
          <import namespace="urn:ietf:params:xml:ns:eppcom-1.0"
            schemaLocation="eppcom-1.0.xsd"/>

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          <import namespace="urn:ietf:params:xml:ns:epp-1.0"
            schemaLocation="epp-1.0.xsd"/>
          <import namespace="urn:ietf:params:xml:ns:contact-1.0"
            schemaLocation="contact-1.0.xsd"/>

       <!--
       Child elements of the <check> command.
       -->
          <element name="check" type="validate:checkType"/>

          <complexType name="checkType">
            <sequence>
              <element name="contact"
                type="validate:validateContactType"
                maxOccurs="unbounded" />
            </sequence>
          </complexType>

          <complexType name="validateContactType">
            <sequence>
              <element name="id"
                type="eppcom:clIDType" />
              <element name="postalInfo"
                type="contact:postalInfoType"
                minOccurs="0" maxOccurs="2" />
              <element name="voice"
                type="contact:e164Type" minOccurs="0" />
              <element name="fax"
                type="contact:e164Type" minOccurs="0" />
              <element name="email"
                type="eppcom:minTokenType" minOccurs="0"/>
              <element name="authInfo"
                type="contact:authInfoType"
                minOccurs="0"/>
              <element name="kv"
                type="validate:kvType" minOccurs="0"
                maxOccurs="unbounded" />
            </sequence>
            <attribute name="contactType" type="eppcom:labelType"
              use="required"/>
            <attribute name="tld"
              type="eppcom:labelType" use="required"/>
          </complexType>

          <complexType name="kvType">
            <attribute name="contactType"
              type="eppcom:labelType" use="optional" />
            <attribute name="key"

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              type="validate:keyType" use="required" />
           <attribute name="value"
              type="validate:valueType" use="required" />
          </complexType>

          <simpleType name="keyType">
            <restriction base="token">
              <minLength value="1" />
            </restriction>
          </simpleType>

          <simpleType name="valueType">
            <restriction base="token">
              <minLength value="0" />
            </restriction>
          </simpleType>

       <!--
       Child elements of the <check> response.
       -->
          <element name="chkData" type="validate:chkDataType" />

          <complexType name="chkDataType">
            <sequence>
              <element name="cd"
                type="validate:resCreateDataType" maxOccurs="unbounded" />
            </sequence>
          </complexType>

          <complexType name="resCreateDataType">
            <sequence>
              <element name="id"
                type="eppcom:clIDType" />
              <element name="response"
                type="epp:resultCodeType" />
              <element name="kv"
                type="validate:kvType"
                minOccurs="0" maxOccurs="unbounded" />
            </sequence>
          </complexType>

       </schema>
       END

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    5.  Security Considerations

       The mapping 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.

    6.  IANA Considerations

    6.1.  XML Namespace

       This document uses URNs to describe XML namespaces and XML schemas
       conforming to a registry mechanism described in [RFC3688].

       Registration request for the validate namespace:

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

       Registrant Contact: IESG

       XML: None.  Namespace URIs do not represent an XML specification.

       Registration request for the validate schema:

       URI: urn:ietf:params:xml:schema:validate-1.0

       Registrant Contact: IESG

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

    7.  Implemntation Status

       Note to RFC Editor: Please remove this section and the reference to
       [RFC7942] before publication.

       This section records the status of known implementations of the
       protocol defined by this specification at the time of posting of this
       Internet-Draft, and is based on a proposal described in [RFC7942].
       The description of implementations in this section is intended to
       assist the IETF in its decision processes in progressing drafts to
       RFCs.  Please note that the listing of any individual implementation
       here does not imply endorsement by the IETF.  Furthermore, no effort
       has been spent to verify the information presented here that was
       supplied by IETF contributors.  This is not intended as, and must not
       be construed to be, a catalog of available implementations or their
       features.  Readers are advised to note that other implementations may
       exist.

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       According to [RFC7942], "this will allow reviewers and working groups
       to assign due consideration to documents that have the benefit of
       running code, which may serve as evidence of valuable experimentation
       and feedback that have made the implemented protocols more mature.
       It is up to the individual working groups to use this information as
       they see fit".

    7.1.  To Be Filled In

       Add implementation details once available.

    8.  Acknowledgements

       The authors wish to thank the following persons for their feedback
       and suggestions:

       o  Kevin Allendorf of GoDaddy Inc.
       o  Jody Kolker of GoDaddy Inc.
       o  James Gould of Verisign Inc

    9.  Change History

    9.1.  Change from 03 to 04

       Removed the <validate:cd> element from the <check> command, moving
       all sub-elements to the <validate:contact> element to simplify.  Also
       removed the <disclose> element as it was not needed in this context.
       Also updated references to current versions of documents.

    9.2.  Change from 02 to 03

       Corrected some formatting issues.

    9.3.  Change from 01 to 02

       Corrected some formatting issues.

    9.4.  Change from 00 to 01

       After review and broad feedback, extensive changes have been made
       transforming the original document from a standalone extension
       command to using the <check> command and response framework.  Stubbed
       in an Implementation section for later documentation.

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    9.5.  Change from carney-regext 01 to ietf-regext 00

       Updated miscellaneous verbiage to reflect the change from an
       extension and changed to ietf naming as REGEXT WG will assume this
       work.

    10.  Normative References

       [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
                  Requirement Levels", BCP 14, RFC 2119,
                  DOI 10.17487/RFC2119, March 1997,
                  <https://www.rfc-editor.org/info/rfc2119>.

       [RFC3688]  Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
                  DOI 10.17487/RFC3688, January 2004,
                  <https://www.rfc-editor.org/info/rfc3688>.

       [RFC5730]  Hollenbeck, S., "Extensible Provisioning Protocol (EPP)",
                  STD 69, RFC 5730, DOI 10.17487/RFC5730, August 2009,
                  <https://www.rfc-editor.org/info/rfc5730>.

       [RFC5733]  Hollenbeck, S., "Extensible Provisioning Protocol (EPP)
                  Contact Mapping", STD 69, RFC 5733, DOI 10.17487/RFC5733,
                  August 2009, <https://www.rfc-editor.org/info/rfc5733>.

       [RFC7942]  Sheffer, Y. and A. Farrel, "Improving Awareness of Running
                  Code: The Implementation Status Section", BCP 205,
                  RFC 7942, DOI 10.17487/RFC7942, July 2016,
                  <https://www.rfc-editor.org/info/rfc7942>.

       [RFC8174]  Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
                  2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
                  May 2017, <https://www.rfc-editor.org/info/rfc8174>.

    Authors' Addresses

       Roger Carney
       GoDaddy Inc.
       14455 N. Hayden Rd. #219
       Scottsdale, AZ  85260
       US

       Email: rcarney@godaddy.com
       URI:   http://www.godaddy.com

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       Joseph Snitker
       GoDaddy Inc.
       14455 N. Hayden Rd. #219
       Scottsdale, AZ  85260
       US

       Email: jsnitker@godaddy.com
       URI:   http://www.godaddy.com

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