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VeriSign Inc. Proprietary Information | J. Gould
| S. Veeramachaneni
| VeriSign, Inc.
| January 10, 2014

#
Whois Info Extension for the Extensible Provisioning Protocol (EPP)

### Abstract

This document describes an Extensible Provisioning Protocol (EPP) extension mapping for retrieving additional information for a domain name, as defined in the EPP domain name mapping, that has historically been available only in Whois.

### Legal Disclaimer

COPYRIGHT NOTIFICATION

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NOTICE AND CAUTION

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### Table of Contents

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### 1. Introduction

This document describes an extension mapping for version 1.0 of the Extensible Provisioning Protocol (EPP) (Hollenbeck, S., “Extensible Provisioning Protocol (EPP),” August 2009.) [RFC5730]. This EPP extension enables a client to retrieve additional information for a domain name, as defined in the EPP domain name mapping (Hollenbeck, S., “Extensible Provisioning Protocol (EPP) Domain Name Mapping,” August 2009.) [RFC5731], that has historically been available only in Whois (Daigle, L., “WHOIS Protocol Specification,” September 2004.) [RFC3912].

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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", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119 (Bradner, S., “Key words for use in RFCs to Indicate Requirement Levels,” March 1997.) [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.

"whoisInf-1.0" is used as an abbreviation for "http://www.verisign.com/epp/whoisInf-1.0". The XML namespace prefix "whoisInf" 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.

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### 2. Object Attributes

This extension adds additional elements to the EPP domain name mapping (Hollenbeck, S., “Extensible Provisioning Protocol (EPP) Domain Name Mapping,” August 2009.) [RFC5731]. Only those new elements are described here.

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### 3. EPP Command Mapping

A detailed description of the EPP syntax and semantics can be found in the EPP core protocol specification [RFC5730] (Hollenbeck, S., “Extensible Provisioning Protocol (EPP),” August 2009.).

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### 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 EPP domain name mapping (Hollenbeck, S., “Extensible Provisioning Protocol (EPP) Domain Name Mapping,” August 2009.) [RFC5731].

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### 3.1.2. EPP <info> Command

This extension defines additional elements to extend the EPP <info> command described in EPP domain name mapping (Hollenbeck, S., “Extensible Provisioning Protocol (EPP) Domain Name Mapping,” August 2009.) [RFC5731].

The EPP <info> command is used to retrieve information associated with a domain object. In addition to the EPP command elements described in the EPP domain name mapping (Hollenbeck, S., “Extensible Provisioning Protocol (EPP) Domain Name Mapping,” August 2009.) [RFC5731], the command MUST contain an <extension> element. The <extension> element MUST contain a child <whoisInf:whoisInf> element that contains the following child element:

> <whoisInf:flag>
>   element MUST contain a boolean value of "1" or "true" to indicate that additional whois information is desired in the response or a value of "0" or "false" to indicate that no additional whois information is desired in the response.

Example <info> command with the Whois Info extension:

    C:<?xml version="1.0" encoding="UTF-8"?>
    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>example.com</domain:name>
    C:      </domain:info>
    C:    </info>
    C:    <extension>
    C:      <whoisInf:whoisInf
    C:        xmlns:whoisInf="http://www.verisign.com/epp/whoisInf-1.0">
    C:        <whoisInf:flag>1</whoisInf:flag>
    C:      </whoisInf:whoisInf>
    C:    </extension>
    C:    <clTRID>ABC-12345</clTRID>
    C:  </command>
    C:</epp>

When an <info> command has been processed successfully, the EPP <infData> element MUST contain child elements as described in the EPP domain name mapping (Hollenbeck, S., “Extensible Provisioning Protocol (EPP) Domain Name Mapping,” August 2009.) [RFC5731]. In addition to the EPP response element described described in EPP domain name mapping (Hollenbeck, S., “Extensible Provisioning Protocol (EPP) Domain Name Mapping,” August 2009.) [RFC5731], the response MUST contain an <extension> element with a <whoisInf:whoisInfData> child element if the <whoisInf:whoisInf> command extension was included with a <whoisInf:flag> value of "1" or "true". The <whoisInf:whoisInfData> element contains the following child elements:

> <whoisInf:registrar>
>   element that contains the full name of the sponsoring Registrar.
> <whoisInf:whoisServer>
>   OPTIONAL element element that contains the sponsoring Registrar's referral whois server name.
> <whoisInf:url>
>   OPTIONAL element element that contains the sponsoring Registrar's referral URL.
> <whoisInf:irisServer>
>   OPTIONAL element element that contains the sponsoring Registrar's referral IRIS server name.

Example <info> response with the Whois Info extension:

    S:<?xml version="1.0" encoding="UTF-8"?>
    S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
    S:  <response>
    S:    <result code="1000">
    S:      <msg>Command completed successfully</msg>
    S:    </result>
    S:    <resData>
    S:      <domain:infData
    S:        xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
    S:        <domain:name>example.com</domain:name>
    S:        <domain:roid>EXAMPLE1-VRSN</domain:roid>
    S:        <domain:status s="ok"/>
    S:        <domain:clID>ClientX</domain:clID>
    S:        <domain:crID>ClientY</domain:crID>
    S:        <domain:crDate>2005-11-11T18:09:52.0354Z
    S:        </domain:crDate>
    S:        <domain:authInfo>
    S:          <domain:pw>2fooBAR</domain:pw>
    S:        </domain:authInfo>
    S:      </domain:infData>
    S:    </resData>
    S:    <extension>
    S:      <whoisInf:whoisInfData
    S:        xmlns:whoisInf="http://www.verisign.com/epp/whoisInf-1.0">
    S:        <whoisInf:registrar>Example Registrar Inc.
    S:        </whoisInf:registrar>
    S:        <whoisInf:whoisServer>whois.example.com
    S:        </whoisInf:whoisServer>
    S:        <whoisInf:url>http://www.example.com
    S:        </whoisInf:url>
    S:        <whoisInf:irisServer>iris.example.com
    S:        </whoisInf:irisServer>
    S:      </whoisInf:whoisInfData>
    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> command or <transfer> response described in the EPP domain name mapping (Hollenbeck, S., “Extensible Provisioning Protocol (EPP) Domain Name Mapping,” August 2009.) [RFC5731].

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### 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.

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### 3.2.1. EPP <create> Command

This extension does not add any elements to the EPP <create> command or <create> response described in the EPP domain name mapping (Hollenbeck, S., “Extensible Provisioning Protocol (EPP) Domain Name Mapping,” August 2009.) [RFC5731].

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### 3.2.2. EPP <delete> Command

This extension does not add any elements to the EPP <delete> command or <delete> response described in the EPP domain name mapping (Hollenbeck, S., “Extensible Provisioning Protocol (EPP) Domain Name Mapping,” August 2009.) [RFC5731].

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### 3.2.3. EPP <renew> Command

This extension does not add any elements to the EPP <renew> command or <renew> response described in the EPP domain name mapping (Hollenbeck, S., “Extensible Provisioning Protocol (EPP) Domain Name Mapping,” August 2009.) [RFC5731].

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### 3.2.4. EPP <transfer> Command

This extension does not add any elements to the EPP <transfer> command or <transfer> response described in the EPP domain name mapping (Hollenbeck, S., “Extensible Provisioning Protocol (EPP) Domain Name Mapping,” August 2009.) [RFC5731].

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### 3.2.5. EPP <update> Command

This extension does not add any elements to the EPP <update> command or <update> response described in the EPP domain name mapping (Hollenbeck, S., “Extensible Provisioning Protocol (EPP) Domain Name Mapping,” August 2009.) [RFC5731].

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### 4. Formal Syntax

One schema is presented here that is the Whois Info 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. Whois Info Extension Schema

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

    <schema targetNamespace=
      "http://www.verisign.com/epp/whoisInf-1.0"
      xmlns:whoisInf="http://www.verisign.com/epp/whoisInf-1.0"
      xmlns:eppcom="urn:ietf:params:xml:ns:eppcom-1.0"
      xmlns="http://www.w3.org/2001/XMLSchema"
      elementFormDefault="qualified">

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

      <annotation>
         <documentation>
           Extensible Provisioning Protocol v1.0
           extension schema for Whois Info
         </documentation>
      </annotation>

    <!--
    Possible Whois Info extension root elements
    -->
      <element name="whoisInf"
        type="whoisInf:whoisInfType"/>
      <element name="whoisInfData"
        type="whoisInf:whoisInfDataType"/>

    <!--
    Child elements for the <whoisInf> extension which
    is used as an extension to an info command.
    -->
      <complexType name="whoisInfType">
        <sequence>
          <element name="flag" type="boolean"/>
        </sequence>
      </complexType>

    <!--
    Child elements for the <whoisInfData> extension which
    is used as an extension to the info response.
    -->
      <complexType name="whoisInfDataType">
        <sequence>
          <element name="registrar" type="string"/>
          <element name="whoisServer" type="eppcom:labelType"
            minOccurs="0"/>
          <element name="url" type="token"
            minOccurs="0"/>
          <element name="irisServer" type="eppcom:labelType"
            minOccurs="0"/>
        </sequence>
      </complexType>

    </schema>
    END

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### 5. Change History

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### 5.1. Version 00

1. Initial version of Internet-Draft format of the Whois Info Extension, version 1.0.

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### 6. Security Considerations

The mapping extensions described in this document do not provide any security services beyond those described by EPP (Hollenbeck, S., “Extensible Provisioning Protocol (EPP),” August 2009.) [RFC5730] and protocol layers used by EPP. The security considerations described in these other specifications apply to this specification as well.

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### 7. Normative References

[RFC2119] | Bradner, S., “Key words for use in RFCs to Indicate Requirement Levels,” BCP 14, RFC 2119, March 1997 (TXT, HTML, XML).
[RFC3912] | Daigle, L., “WHOIS Protocol Specification,” RFC 3912, September 2004 (TXT).
[RFC5730] | Hollenbeck, S., “Extensible Provisioning Protocol (EPP),” STD 69, RFC 5730, August 2009 (TXT).
[RFC5731] | Hollenbeck, S., “Extensible Provisioning Protocol (EPP) Domain Name Mapping,” STD 69, RFC 5731, August 2009 (TXT).

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### Authors' Addresses

| James Gould
| VeriSign, Inc.
| 12061 Bluemont Way
| Reston, VA 20190
| US
Email: | jgould@verisign.com
URI: | http://www.verisigninc.com
| Srikanth Veeramachaneni
| VeriSign, Inc.
| 12061 Bluemont Way
| Reston, VA 20190
| US
Email: | sveeramachaneni@verisign.com
URI: | http://www.verisigninc.com