Internet Engineering Task Force (IETF)                           L. Zhou
Internet-Draft
Request for Comments: 7485                                       N. Kong
Intended status:
Category: Informational                                          S. Shen
Expires: April 30, 2015
ISSN: 2070-1721                                                    CNNIC
                                                                S. Sheng
                                                                   ICANN
                                                               A. Servin
                                                                  LACNIC
                                                        October 27, 2014

      Registration Data Access Protocol Object
                                                           February 2015

          Inventory and Analysis
                 draft-ietf-weirds-object-inventory-06 of WHOIS Registration Objects

Abstract

   WHOIS output objects from registries (including registries, including both Regional
   Internet Registries (RIRs) and Domain Name Registries (DNRs)) (DNRs), were
   collected and analyzed.  This document describes the statistical
   analysis process and
   results of the statistical analysis of existing WHOIS information.
   The purpose of this document is to build an object inventory to
   facilitate discussions of data objects included in Registration Data
   Access Protocol (RDAP) responses.

Status of This Memo

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   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents not an Internet Standards Track specification; it is
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   This Internet-Draft will expire on April 30, 2015.
   http://www.rfc-editor.org/info/rfc7485.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Methodology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  RIR Objects Analysis  . . . . . . . . . . . . . . . . . . . .   5
     4.1.  WHOIS Data for Organizations Holding a Resource . . . . .   5
     4.2.  WHOIS Data for Contacts . . . . . . . . . . . . . . . . .   7
     4.3.  WHOIS data Data for IP Addresses . . . . . . . . . . . . . . .   9
     4.4.  WHOIS data Data for ASNs . . . . . . . . . . . . . . . . . . .  11
     4.5.  Conclusion  . . . . . . . . . . . . . . . . . . . . . . .  13  12
   5.  DNR Objects Object Analysis . . . . . . . . . . . . . . . . . . . .  13 .  12
     5.1.  Overview  . . . . . . . . . . . . . . . . . . . . . . . .  13  12
     5.2.  Public Objects  . . . . . . . . . . . . . . . . . . . . .  13  12
       5.2.1.  WHOIS Data for Domains  . . . . . . . . . . . . . . .  13  12
       5.2.2.  WHOIS Data for Contacts . . . . . . . . . . . . . . .  14  13
         5.2.2.1.  Registrant  . . . . . . . . . . . . . . . . . . .  15  14
         5.2.2.2.  Admin Contact . . . . . . . . . . . . . . . . . .  16  15
         5.2.2.3.  Tech Contact  . . . . . . . . . . . . . . . . . .  17  16
         5.2.2.4.  Billing Contact . . . . . . . . . . . . . . . . .  18  17
       5.2.3.  WHOIS Data for Nameservers  . . . . . . . . . . . . .  19  18
       5.2.4.  WHOIS Data for Registrars . . . . . . . . . . . . . .  19  18
     5.3.  Other Objects . . . . . . . . . . . . . . . . . . . . . .  20  19
     5.4.  Conclusion  . . . . . . . . . . . . . . . . . . . . . . .  22  21
       5.4.1.  Preliminary Statistics  . . . . . . . . . . . . . . .  22  21
       5.4.2.  Data Elements Element Analysis . . . . . . . . . . . . . . .  24 .  23
       5.4.3.  Labels  Label Analysis  . . . . . . . . . . . . . . . . . . .  26  25
       5.4.4.  Analysis of Other Objects Analysis  . . . . . . . . . . . . . . .  26  25
     5.5.  Limitations . . . . . . . . . . . . . . . . . . . . . . .  27  26
   6.  Reference Extension Objects . . . . . . . . . . . . . . . . .  27  26
     6.1.  RIR Reference Extension Objects . . . . . . . . . . . . .  28  27
     6.2.  DNR Reference Extension Objects . . . . . . . . . . . . .  28  27
   7.  IANA  Security Considerations . . . . . . . . . . . . . . . . . . . . .  28  27
   8.  Security considerations . . . . . . . . . . . . . . . . . . .  28
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  29
   10.  Informative References  . . . . . . . . . . . . . . . . . . .  29  27
   Appendix A.  Change Log . . . . . . . . . . . . . . . . . . . . .  30
   Authors' Addresses  . . . . .  Acknowledgements . . . . . . . . . . . . . . . . . .  31  29

1.  Introduction

   Regional Internet Registries (RIRs) and Domain Name Registries (DNRs)
   have historically maintained a lookup service to permit public access
   to some portion of the registry database.  Most registries offer the
   service via the WHOIS protocol [RFC3912], with additional services
   being offered via world wide web World Wide Web pages, bulk downloads, and other
   services, such as Routing Policy Specification Language (RPSL)
   [RFC2622].

   Although the WHOIS protocol is widely adopted and supported, it has
   several shortcomings that limit its usefulness to the evolving needs
   of the Internet community.  Specifically,  Specifically:

   o  It has no query and response format.

   o  It does not support user authentication and or access control for
      differentiated access.

   o  It has not been internationalized and thus does not consistently
      support Internationalized Domain Names (IDNs, (IDNs) as described in
      [RFC5890]).
      [RFC5890].

   This document records an inventory of registry data objects to
   facilitate discussions of registration data objects.  The
   Registration Data Access Protocol (RDAP)
   ([I-D.ietf-weirds-rdap-query], [I-D.ietf-weirds-json-response],
   [I-D.ietf-weirds-using-http] ([RFC7480], [RFC7482],
   [RFC7483], and [I-D.ietf-weirds-bootstrap]) [RFC7484]) was developed using this inventory as
   input.

   In the number space, there were altogether five RIRs.  Although all
   RIRs provided information about IP addresses, Autonomous System
   Numbers (ASNs) (ASNs), and contacts, the data model used was different for
   each RIR.  In the domain name space, there were over 200 country code
   Top-Level Domains (ccTLDs) and over 400 generic Top-Level Domains
   (gTLDs) when the this document was published.  Different domain name
   registries Domain Name
   Registries may have different WHOIS response objects and formats.  A
   common understanding of all these data formats was critical to
   construct a single data model for each object.

   This document describes the WHOIS data collection procedures and
   gives a data object an inventory analysis of data objects based on the collected
   data from the five RIRs and RIRs, 106 ccTLDs ccTLDs, and 18 gTLDs from DNRs.  The RIR
   data objects are classified by the five RIRs into IP address, ASN,
   person or contact contact, and the organization that held the resource.
   According to
   the SPECIFICATION 4 (SPECIFICATION ("SPECIFICATION FOR REGISTRATION DATA
   PUBLICATION
   SERVICES) SERVICES") of the new gTLD applicant guide book guidebook
   [ICANN.AGB-201206] and the Extensible Provisioning Protocol (EPP)
   ([RFC5730], [RFC5731],
   [RFC5732] [RFC5732], and [RFC5733]), the DNR data
   objects are classified into by whether they relate to the domain, contact, nameserver and registrar related objects.  Other
   objects
   nameserver, or registrar.  Objects that do not belong to above the
   categories above are viewed as private
   designed privately specified objects.  In this
   document, there is no intent to analyze all the query and response
   types existed that exist in RIRs and DNRs.  The most common query objects are
   discussed, but other objects such as RPSL data structures used by
   Internet Routing Registries (IRRs) can be documented later if the
   community feels it is necessary.

2.  Terminology

   o  Data element -- - The name of a specific response object.

   o  Label -- - The name given to a particular data element, which element; it may vary
      between registries.

   o  Most popular label -- - The label which that is most supported by the
      registries.

   o  Number of labels -- - The number of different labels.

   o  Total count --  No. of TLDs - The number of registries that support a certain data
      element.

3.  Methodology

   WHOIS information, including port 43 response and web response data,
   was collected between July 9th, 2012 9, 2012, and July 20th, 2012 20, 2012, following the
   procedures described below.

   (1)  First, find the RIR WHOIS servers of the five RIRs RIRs, which are
        AFRINIC, APNIC, ARIN, LACNIC LACNIC, and RIPE NCC.  All the RIRs
        provide information of IPs, ASNs about IP addresses, ASNs, and contacts.

   (2)  Query the corresponding IPs, IP addresses, ASNs, contacts contacts, and
        organizations registered in the five RIRs and RIRs.  Then, make a
        comparative analysis of the
        responses response data.

   (3)  Data  Group together the data elements with that have the same meaning, meaning but using
        use different labels,
        were grouped together. labels.

   DNR objects collections object collection process:

   (1)  A programming script was applied to collect port 43 response
        data from 294 ccTLDs. "nic.ccTLD" is was used as the query string,
        which is usually registered in a domain registry.  Responses for
        106 ccTLDs were received. 18 gTLDs' port 43 response data was
        collected from their contracts with ICANN.  Thus, the sample
        size of port 43 WHOIS response data is 124 registries in total.

   (2)  WHOIS data from the web was collected manually from the 124
        registries that send port 43 WHOIS responses.

   (3)  Some of the responses response that which were collected by the program
        did not seem to be correct, so data of for the top 10 ccTLD
        registries, like .de, .eu .eu, and .uk etc., .uk, was re-verified by querying
        domain names other than "nic.ccTLD".

   (4)  In accordance with the SPECIFICATION 4 of the new gTLD applicant
        guide book
        guidebook [ICANN.AGB-201206] and the Extensible Provisioning
        Protocol (EPP) EPP ([RFC5730], [RFC5731],
        [RFC5732] and [RFC5733]), the response data objects are
        classified into public and other data objects.  Public data
        objects are those which that are defined in the above references.
        Other objects are those which that are privately specified data
        elements or objects in different registries.

   (5)  Data elements with the same meaning, but using different labels,
        were grouped together.  The numbers number of registries that support
        the
        each data elements are element is shown in the total count "No. of TLDs" column.

4.  RIR Objects Analysis

4.1.  WHOIS Data for Organizations Holding a Resource

   The table

   Table 1 shows the organization objects of the five RIRs.

 +--------------+------------+-----+----------+-----------+------------+
 |     RIR      |  AFRINIC   |APNIC|    ARIN  |   LACNIC  |  RIPE NCC  |
 |   Objects    |            |     |          |           |            |
 +--------------+------------+-----+----------+-----------+------------+
 | Organization |organisation|  NA |    Name  |   Owner   |  org-name  |
 |     name     |            |     |          |           |            |
 +--------------+------------+-----+----------+-----------+------------+
 | Organization |  org-name  |  NA |   Handle |  owner-id |organisation|
 |     ID       |            |     |          |           |            |
 +--------------+------------+-----+----------+-----------+------------+
 |   Company    |     NA     |  NA |  Company |     NA    |     NA     |
 +--------------+------------+-----+----------+-----------+------------+
 |   Name of    |     NA     |  NA |     NA   |responsible|     NA     |
 |    person    |            |     |          |           |            |
 |  responsible |            |     |          |           |            |
 +--------------+------------+-----+----------+-----------+------------+
 |    Type of   |  org-type  |  NA |     NA   |     NA    |  org-type  |
 | organization |            |     |          |           |            |
 +--------------+------------+-----+----------+-----------+------------+
 |   Country    |  country   |  NA |  country |  country  |  country   |
 +--------------+------------+-----+----------+-----------+------------+
 |    Postal    |  address   |  NA |  address |  address  |  address   |
 |   Address    |            |     |          |           |            |
 +--------------+------------+-----+----------+-----------+------------+
 |     City     |     NA     |  NA |    city  |     NA    |  address   |
 +--------------+------------+-----+----------+-----------+------------+
 |    State     |     NA     |  NA | StateProv|     NA    |  address   |
 +--------------+------------+-----+----------+-----------+------------+
 |    Postal    |     NA     |  NA |PostalCode|     NA    |  address   |
 |     Code     |            |     |          |           |            |
 +--------------+------------+-----+----------+-----------+------------+
 |    Phone     |   phone    |  NA |   NA     |   phone   |   phone    |
 +--------------+------------+-----+----------+-----------+------------+
 |  Fax Number  |   fax-no   |  NA |   NA     |     NA    |   fax-no   |
 +--------------+------------+-----+----------+-----------+------------+
 |    ID of     |  admin-c   |  NA |   Admin  |  owner-c  |  admin-c   |
 |administrative|            |     |    POC   |           |            |
 |   contact    |            |     |          |           |            |
 +--------------+------------+-----+----------+-----------+------------+
 |    ID of     |   tech-c   |  NA | Tech POC |   tech-c  |   tech-c   |
 |  technical   |            |     |          |           |            |
 |   contact    |            |     |          |           |            |
 +--------------+------------+-----+----------+-----------+------------+
 |  Maintainer  |  mnt-ref   |  NA |  NOC POC |     NA    |  mnt-ref   |
 | organization |            |     |          |           |            |
 +--------------+------------+-----+----------+-----------+------------+
 |  Maintainer  |   mnt-by   |  NA |   Abuse  |     NA    |   mnt-by   |
 |   object     |            |     |    POC   |           |            |
 +--------------+------------+-----+----------+-----------+------------+
 |   Remarks    |  remarks   |  NA |     NA   |     NA    |  remarks   |
 +--------------+------------+-----+----------+-----------+------------+
 |   Date of    |  Changed   |  NA |  RegDate |  created  |  Changed   |
 |    record    |            |     |          |           |            |
 |   creation   |            |     |          |           |            |
 +--------------+------------+-----+----------+-----------+------------+
 |   Date of    |  changed   |  NA |  Updated |  changed  |  changed   |
 |    record    |            |     |          |           |            |
 |   changed    |            |     |          |           |            |
 +--------------+------------+-----+----------+-----------+------------+
 |   List of    |     NA     |  NA |     NA   |  list of  |     NA     |
 |  resources   |            |     |          | resources |            |
 +--------------+------------+-----+----------+-----------+------------+
 |    Source    |   source   |  NA |     NA   |     NA    |   source   |
 +--------------+------------+-----+----------+-----------+------------+
 |  Reference   |     NA     |  NA |    Ref   |     NA    |     NA     |
 +--------------+------------+-----+----------+-----------+------------+

         Table 1.  WHOIS Data for Organizations Holding a Resource

4.2.  WHOIS Data for Contacts

   The table

   Table 2 shows the contact objects of the five RIRs.

   +--------------+---------+---------+------------+---------+---------+
   | Data Element | AFRINIC |  APNIC  |    ARIN    |  LACNIC |   RIPE  |
   |              |         |         |            |         |   NCC   |
   +--------------+---------+---------+------------+---------+---------+
   |     Name     |  person |  person |    Name    |  person |  person |
   +--------------+---------+---------+------------+---------+---------+
   |   Company    |    NA   |    NA   |  Company   |    NA   |    NA   |
   +--------------+---------+---------+------------+---------+---------+
   |    Postal    | address | address |  Address   | address | address |
   |   Address    |         |         |            |         |         |
   +--------------+---------+---------+------------+---------+---------+
   |     City     |    NA   |    NA   |    City    |    NA   | address |
   +--------------+---------+---------+------------+---------+---------+
   |    State     |    NA   |    NA   | StateProv  |    NA   | address |
   +--------------+---------+---------+------------+---------+---------+
   | Postal Code  |    NA   |    NA   | PostalCode |    NA   | address |
   +--------------+---------+---------+------------+---------+---------+
   |   Country    |    NA   | country |  Country   | country |    NA   |
   +--------------+---------+---------+------------+---------+---------+
   |    Phone     |  phone  |  phone  |   Mobile   |  phone  |  phone  |
   +--------------+---------+---------+------------+---------+---------+
   |  Fax Number  |  fax-no |  fax-no |    Fax     |    NA   |  fax-no |
   +--------------+---------+---------+------------+---------+---------+
   |    Email     |  e-mail |  e-mail |   Email    |  e-mail |    NA   |
   +--------------+---------+---------+------------+---------+---------+
   |      ID      | nic-hdl | nic-hdl |   Handle   | nic-hdl | nic-hdl |
   +--------------+---------+---------+------------+---------+---------+
   |   Remarks    | remarks | remarks |  Remarks   |    NA   | remarks |
   +--------------+---------+---------+------------+---------+---------+
   |    Notify    |  notify |  notify |     NA     |    NA   |  notify |
   +--------------+---------+---------+------------+---------+---------+
   |    ID of     |  mnt-by |  mnt-by |     NA     |    NA   |  mnt-by |
   |  maintainer  |         |         |            |         |         |
   +--------------+---------+---------+------------+---------+---------+
   | Registration | changed |    NA   |  RegDate   | created | changed |
   |     Date     |         |         |            |         |         |
   +--------------+---------+---------+------------+---------+---------+
   | Registration | changed | changed |  Updated   | changed | changed |
   |    update    |         |         |            |         |         |
   +--------------+---------+---------+------------+---------+---------+
   |    Source    |  source |  source |     NA     |    NA   |  source |
   +--------------+---------+---------+------------+---------+---------+
   |  Reference   |    NA   |    NA   |    Ref     |    NA   |    NA   |
   +--------------+---------+---------+------------+---------+---------+

                     Table 2.  WHOIS Data for Contacts

4.3.  WHOIS data Data for IP Addresses

   The table

   Table 4 shows the IP address objects of the five RIRs.

   Note: Because Due to the length 72-character limit of each on line is 72 characters, too
   long length, strings in some
   cells of the table unites are split into two or more parts, which are placed in order in different
   on separate lines of within the same table unit. cell.  A hyphen in the final
   position of a string indicates this string and
   the one in the next line of that the same table unit are divided because
   of string has been split due to
   the length limit.

                      +----------+----------+----------+
                      | Adminis- |          |  abuse-- |
                      | trative  |  admin-c |  mailbox |
                      | contact  |          |          |
                      +----------+----------+----------+

                   Table 3.  Example of String Splitting

   For instance, the original strings in the table units cells of table Table 3 are
   "Administrative contact", "admin-c" "admin-c", and "abuse-mailbox",
   respectively.

+------------+--------+----------+--------------+--------+-------------+
|    Data    | AFRINIC|  APNIC   |     ARIN     | LACNIC |   RIPE NCC  |
|   Element  |        |          |              |        |             |
+------------+--------+----------+--------------+--------+-------------+
|      IP    | inetnum| inetnum  |   NetRange   |   NA   |   inetnum   |
|   address  |        |          |              |        |             |
|    range   |        |          |              |        |             |
+------------+--------+----------+--------------+--------+-------------+
|     IPV6     IPv6   |inet6num| inet6num |     CIDR     |inetnum |  inet6num   |
|   address  |        |          |              |        |             |
|    range   |        |          |              |        |             |
+------------+--------+----------+--------------+--------+-------------+
| Description| descr  |  descr   |   NetName    |   NA   |    descr    |
|            |        |          |              |        |             |
+------------+--------+----------+--------------+--------+-------------+
|   Remarks  | remarks| remarks  |      NA      |   NA   |   remarks   |
|            |        |          |              |        |             |
+------------+--------+----------+--------------+--------+-------------+
|  Origin AS |   NA   |    NA    |   OriginAS   |OriginAS|      NA     |
|            |        |          |              |(future)|             |
+------------+--------+----------+--------------+--------+-------------+
|   Network  | netname| netname  |  NetHandle   |inetrev |   netname   |
|   name/ID  |        |          |              |        |             |
+------------+--------+----------+--------------+--------+-------------+
| Maintainer | mnt-by |    NA    |      NA      |   NA   |    mnt-by   |
| Object     |        |          |              |        |             |

+------------+--------+----------+--------------+--------+-------------+
| Maintainer | mnt--  |    NA    |      NA      |   NA   |      NA     |
| Sub-       | lower  |          |              |        |             |
| assignments|        |          |              |        |             |
+------------+--------+----------+--------------+--------+-------------+
|  Adminis-  | admin-c| admin-c  |    OrgId     | ownerid|   admin-c   |
|  trative   |        |          |              |        |             |
|  contact   |        |          |              |        |             |
+------------+--------+----------+--------------+--------+-------------+
|    Parent  | parent |    NA    |    Parent    |   NA   |      NA     |
|    range   |        |          |              |        |             |
+------------+--------+----------+--------------+--------+-------------+
|    Status  | status |  status  |   NetType    | status |    status   |
+------------+--------+----------+--------------+--------+-------------+
|Registration| changed|    NA    |   RegDate    | created|   changed   |
|   Date     |        |          |              |        |             |
+------------+--------+----------+--------------+--------+-------------+
|Registration| changed| changed  |   Updated    | changed|   changed   |
|   update   |        |          |              |        |             |
+------------+--------+----------+--------------+--------+-------------+
|  Reference |   NA   |    NA    |     Ref      |   NA   |      NA     |
+------------+--------+----------+--------------+--------+-------------+
|      ID    |  org   |    NA    |    OrgId     | owner  |organisation |
|organization|        |          |              |        |             |
|holding the |        |          |              |        |             |
|   resource |        |          |              |        |             |
+------------+--------+----------+--------------+--------+-------------+
|   Referral |   NA   |    NA    |ReferralServer|   NA   |      NA     |
|    server  |        |          |              |        |             |
+------------+--------+----------+--------------+--------+-------------+
|  Technical | tech-c |  tech-c  |OrgTechHandle | tech-c |    tech-c   |
|   contact  |        |          |              |        |             |
+------------+--------+----------+--------------+--------+-------------+
|    Abuse   |   NA   |    NA    |OrgAbuseHandle| abuse-c|abuse-mailbox|
|   contact  |        |          |              |        |             |
+------------+--------+----------+--------------+--------+-------------+
|   Referral |   NA   |    NA    | RTechHandle  |   NA   |      NA     |
|  technical |        |          |              |        |             |
|   contact  |        |          |              |        |             |
+------------+--------+----------+--------------+--------+-------------+
|   Referral | mnt-irt| mnt-irt  | RAbuseHandle |   NA   |      NA     |
|    abuse   |        |          |              |        |             |
|   contact  |        |          |              |        |             |
+------------+--------+----------+--------------+--------+-------------+
|   Referral |   NA   |    NA    |  RNOCHandle  |   NA   |      NA     |
|     NOC    |        |          |              |        |             |
|   contact  |        |          |              |        |             |
+------------+--------+----------+--------------+--------+-------------+

|     Name   |   NA   |    NA    |      NA      | nserver|      NA     |
|    server  |        |          |              |        |             |
+------------+--------+----------+--------------+--------+-------------+

                   Table 4.  WHOIS Data for IP Addresses

4.4.  WHOIS data Data for ASNs

+--------------+---------+----------+-------------+---------+----------+
|    Data      | AFRINIC |  APNIC   |     ARIN    |  LACNIC | RIPE NCC |
|  Element     |         |          |             |         |          |
+--------------+---------+----------+-------------+---------+----------+
|     ID       | aut-num | aut-num  |   ASNumber  | aut-num | aut-num  |
|              |         |          |             |         |          |
+--------------+---------+----------+-------------+---------+----------+
| Description  | descr   |  descr   |      NA     |    NA   |  descr   |
|              |         |          |             |         |          |
+--------------+---------+----------+-------------+---------+----------+
|Organization  |  org    |    NA    |    OrgId    |  owner  |   org    |
|              |         |          |             |         |          |
+--------------+---------+----------+-------------+---------+----------+
|  Comment     | remarks |    NA    |   Comment   |    NA   | remarks  |
+--------------+---------+----------+-------------+---------+----------+
|Administrative| admin-c | admin-c  |   ASHandle  |owner-id | admin-c  |
|   contact ID |         |          |             |         |          |
+--------------+---------+----------+-------------+---------+----------+
| Technical    | tech-c  |  tech-c  |OrgTechHandle|routing-c|  tech-c  |
| contact ID   |         |          |             |         |          |
+--------------+---------+----------+-------------+---------+----------+
| Organization |   NA    | nic-hdl  |      NA     | owner-c |  organi- |
|     ID       |         |          |             |         |  sation  |
+--------------+---------+----------+-------------+---------+----------+
|  Notify      | notify  |  notify  |      NA     |    NA   |    NA    |
+--------------+---------+----------+-------------+---------+----------+
|  Abuse       |   NA    |    NA    |   OrgAbuse  | abuse-c |    NA    |
|  contact     |         |          |    Handle   |         |          |
+--------------+---------+----------+-------------+---------+----------+
| Maintainer   | mnt-by  |  mnt-by  |      NA     |    NA   |  mnt-by  |
| Object       |         |          |             |         |          |
+--------------+---------+----------+-------------+---------+----------+
| Maintainer   |mnt-lower| mnt-lower|      NA     |    NA   |mnt-lower |
| Sub-         |         |          |             |         |          |
| assignments  |         |          |             |         |          |
+--------------+---------+----------+-------------+---------+----------+
| Maintainer   |   NA    |    NA    |      NA     |    NA   | mnt-ref  |
| Organization |         |          |             |         |          |
+--------------+---------+----------+-------------+---------+----------+
|Registration  | changed |    NA    |   RegDate   | created |    NA    |

|    Date      |         |          |             |         |          |
+--------------+---------+----------+-------------+---------+----------+
|Registration  | changed | changed  |   Updated   | changed |    NA    |
|   update     |         |          |             |         |          |
+--------------+---------+----------+-------------+---------+----------+
|   Source     | source  |  source  |      NA     |    NA   |  source  |
+--------------+---------+----------+-------------+---------+----------+

                       Table 5.  WHOIS Data for ASNs

4.5.  Conclusion

   As it could can be observed, some data elements were not supported by all
   RIRs
   RIRs, and some ones were named as given different labels by different RIRs.
   There  Also,
   there were identical labels used for different data elements by
   different RIRs.  In order to construct a single data model for each
   object, a selection of the most common and useful fields was made.
   That initial selection was the starting point for
   [I-D.ietf-weirds-json-response]. [RFC7483].

5.  DNR Objects Object Analysis

5.1.  Overview

   WHOIS data was collected from 124 registries, including 106 ccTLDs
   and 18 gTLDs.  All the 124 registries support domain queries.  Among 124
   registries, eight ccTLDs and 15 gTLDs support queries for specific
   contact persons or roles. 10 ccTLDs and 18 gTLDs support queries by
   nameserver.  Four ccTLDs and 18 gTLDs support registrar queries.
   Domain WHOIS data contain 68 data elements that use a total of 550
   labels.  There is a total of 392 other objects for domain WHOIS data.  The raw data can be accessed at WHOIS Statistics Data
   File [Stat-Data-File].

5.2.  Public Objects

   As mentioned above, public objects are those data elements selected
   according to the new gTLD applicant guide book guidebook and EPP protocols. EPP.  They are
   generally classified into four categories: domain, contact,
   nameserver and registrar categories by whether they are related information.
   to the domain, contact, nameserver, or registrar.

5.2.1.  WHOIS Data for Domains

   WHOIS replies about domains include "Domain Name", "Creation Date",
   "Domain Status", "Expiration Date", "Updated Date", "Domain ID",
   "DNSSEC"
   "DNSSEC", and "Last Transferred Date".  The table  Table 6 gives the element
   name, most popular label label, and the corresponding numbers of TLDs and
   labels.

   +-------------------+-------------------+------------+--------------+
   |    Data Element   |    Most Popular   |   No. of   |    No. of    |
   |                   |       Label       |    TLDs    |    Labels    |
   +-------------------+-------------------+------------+--------------+
   |    Domain Name    |    Domain Name    |    118     |      6       |
   +-------------------+-------------------+------------+--------------+
   |   Creation Date   |      Created      |    106     |      24      |
   +-------------------+-------------------+------------+--------------+
   |   Domain Status   |       Status      |     95     |      8       |
   +-------------------+-------------------+------------+--------------+
   |  Expiration Date  |  Expiration Date  |     81     |      21      |
   +-------------------+-------------------+------------+--------------+
   |    Updated Date   |      Modified     |     70     |      20      |
   +-------------------+-------------------+------------+--------------+
   |     Domain ID     |     Domain ID     |     34     |      5       |
   +-------------------+-------------------+------------+--------------+
   |       DNSSEC      |       DNSSEC      |     14     |      4       |
   +-------------------+-------------------+------------+--------------+
   |  Last Transferred |  Last Transferred |     4      |      3       |
   |        Date       |        Date       |            |              |
   +-------------------+-------------------+------------+--------------+

                     Table 6.  WHOIS Data for Domains

   Several statistical conclusion that conclusions obtained from above data include: are:

   o  About  95.16% of the 124 registries support a "Domain Name" data element.

   o  Nearly  85.48% of the 124 registries support a "Creation Date" data
      element.

   o  Almost  76.61% of the 124 registries support a "Domain Status" data
      element
      element.

   o  On the other hand, some elements such as "DNSSEC" and "Last
      Transferred Date" are only supported by 11.29% and 3.23% of all the registries seperately.
      registries, respectively.

5.2.2.  WHOIS Data for Contacts

   In the domain name space, contacts are typically divided into
   registrant, administrative contact, technical contact contact, and billing
   contact.

5.2.2.1.  Registrant

   The table

   Table 7 shows all the contact information for a registrant. 14 data
   elements are listed below.

   +--------------------+---------------------+-----------+------------+
   |    Data Element    |  Most Popular Label |   No. of  |   No. of   |
   |                    |                     |    TLDs   |   Labels   |
   +--------------------+---------------------+-----------+------------+
   |  Registrant Name   |         Name        |     65    |     7      |
   +--------------------+---------------------+-----------+------------+
   |  Registrant Email  |   Registrant Email  |     59    |     7      |
   +--------------------+---------------------+-----------+------------+
   |   Registrant ID    |    Registrant ID    |     50    |     12     |
   +--------------------+---------------------+-----------+------------+
   |  Registrant Phone  |   Registrant Phone  |     48    |     6      |
   +--------------------+---------------------+-----------+------------+
   |   Registrant Fax   |    Registrant Fax   |     44    |     6      |
   +--------------------+---------------------+-----------+------------+
   |     Registrant     |      Registrant     |     42    |     4      |
   |    Organization    |     Organization    |           |            |
   +--------------------+---------------------+-----------+------------+
   | Registrant Country |       Country       |     42    |     6      |
   |        Code        |                     |           |            |
   +--------------------+---------------------+-----------+------------+
   |  Registrant City   |   Registrant City   |     38    |     4      |
   +--------------------+---------------------+-----------+------------+
   | Registrant Postal  |  Registrant Postal  |     37    |     5      |
   |        Code        |         Code        |           |            |
   +--------------------+---------------------+-----------+------------+
   |     Registrant     |      Registrant     |     32    |     4      |
   |   State/Province   |    State/Province   |           |            |
   +--------------------+---------------------+-----------+------------+
   | Registrant Street  |  Registrant Street1 |     31    |     16     |
   +--------------------+---------------------+-----------+------------+
   | Registrant Country |  Registrant Country |     19    |     4      |
   +--------------------+---------------------+-----------+------------+
   |  Registrant Phone  |   Registrant Phone  |     18    |     2      |
   |        Ext.        |         Ext.        |           |            |
   +--------------------+---------------------+-----------+------------+
   | Registrant Fax Ext |  Registrant Fax Ext |     17    |     2      |
   +--------------------+---------------------+-----------+------------+

                           Table 7.  Registrant

   Among all the data elements, only "Registrant Name" is supported by
   more than one half of registries and those registries.  Those supported by more than one
   third of registries are: "Registrant Name", "Registrant Email",
   "Registrant ID", "Registrant Phone", "Registrant Fax", "Registrant
   Organization"
   Organization", and "Registrant Country Code".

5.2.2.2.  Admin Contact

   The table

   Table 8 shows all the contact information for an administrative
   contact. 14 data elements are listed below.

   +--------------------+--------------------+-----------+-------------+
   |    Data Element    | Most Popular Label |   No. of  |    No. of   |
   |                    |                    |    TLDs   |    Labels   |
   +--------------------+--------------------+-----------+-------------+
   |    Admin Street    |      Address       |     64    |      19     |
   +--------------------+--------------------+-----------+-------------+
   |     Admin Name     |     Admin Name     |     60    |      9      |
   +--------------------+--------------------+-----------+-------------+
   |    Admin Email     |    Admin Email     |     54    |      12     |
   +--------------------+--------------------+-----------+-------------+
   |      Admin ID      |      Admin ID      |     52    |      16     |
   +--------------------+--------------------+-----------+-------------+
   |     Admin Fax      |     Admin Fax      |     44    |      8      |
   +--------------------+--------------------+-----------+-------------+
   |    Admin Phone     |    Admin Phone     |     43    |      9      |
   +--------------------+--------------------+-----------+-------------+
   | Admin Organization | Admin Organization |     42    |      9      |
   +--------------------+--------------------+-----------+-------------+
   | Admin Country Code |      Country       |     42    |      7      |
   +--------------------+--------------------+-----------+-------------+
   |     Admin City     |     Admin City     |     35    |      5      |
   +--------------------+--------------------+-----------+-------------+
   | Admin Postal Code  | Admin Postal Code  |     35    |      7      |
   +--------------------+--------------------+-----------+-------------+
   |       Admin        |       Admin        |     28    |      5      |
   |   State/Province   |   State/Province   |           |             |
   +--------------------+--------------------+-----------+-------------+
   |   Admin Country    |   Admin Country    |     17    |      5      |
   +--------------------+--------------------+-----------+-------------+
   |  Admin Phone Ext.  |  Admin Phone Ext.  |     17    |      3      |
   +--------------------+--------------------+-----------+-------------+
   |   Admin Fax Ext.   |   Admin Fax Ext.   |     17    |      3      |
   +--------------------+--------------------+-----------+-------------+

                          Table 8.  Admin Contact

   Among all the data elements, only "Admin Street" is supported by more
   than one half of registries and those registries.  Those supported by more than one third
   of registries are: "Admin Street", "Admin Name", "Admin Email",
   "Admin ID", "Admin Fax", "Admin Phone", "Admin Organization" Organization", and
   "Admin Country Code".

5.2.2.3.  Tech Contact

   The table

   Table 9 shows all the information for a domain name technical
   contact. 14 data elements are listed below.

   +--------------------+--------------------+-----------+-------------+
   |    Data Element    | Most Popular Label |   No. of  |    No. of   |
   |                    |                    |    TLDs   |    Labels   |
   +--------------------+--------------------+-----------+-------------+
   |     Tech Email     |     Tech Email     |     59    |      9      |
   +--------------------+--------------------+-----------+-------------+
   |      Tech ID       |      Tech ID       |     55    |      16     |
   +--------------------+--------------------+-----------+-------------+
   |     Tech Name      |     Tech Name      |     47    |      6      |
   +--------------------+--------------------+-----------+-------------+
   |      Tech Fax      |      Tech Fax      |     45    |      9      |
   +--------------------+--------------------+-----------+-------------+
   |     Tech Phone     |     Tech Phone     |     45    |      10     |
   +--------------------+--------------------+-----------+-------------+
   | Tech Country Code  |      Country       |     43    |      9      |
   +--------------------+--------------------+-----------+-------------+
   | Tech Organization  | Tech Organization  |     39    |      7      |
   +--------------------+--------------------+-----------+-------------+
   |     Tech City      |     Tech City      |     36    |      4      |
   +--------------------+--------------------+-----------+-------------+
   |  Tech Postal Code  |  Tech Postal Code  |     36    |      7      |
   +--------------------+--------------------+-----------+-------------+
   |        Tech        |        Tech        |     30    |      4      |
   |   State/Province   |   State/Province   |           |             |
   +--------------------+--------------------+-----------+-------------+
   |    Tech Street     |    Tech Street1    |     27    |      16     |
   +--------------------+--------------------+-----------+-------------+
   |    Tech Country    |    Tech Country    |     18    |      5      |
   +--------------------+--------------------+-----------+-------------+
   |    Tech Fax Ext    |    Tech Fax Ext    |     18    |      3      |
   +--------------------+--------------------+-----------+-------------+
   |  Tech Phone Ext.   |  Tech Phone Ext.   |     13    |      3      |
   +--------------------+--------------------+-----------+-------------+

                          Table 9.  Tech Contact

   Among all the data elements, there are no elements supported by more
   than one half of registries and those registries.  Those supported by more than one third
   of registries are: "Tech Email", "Tech ID", "Tech Name","Tech
   Fax","Tech Phone" Name", "Tech Fax",
   "Tech Phone", and "Tech Country Code".

5.2.2.4.  Billing Contact

   The table

   Table 10 shows all the information for a domain name billing contact.
   14 data elements are listed below.

   +--------------------+--------------------+-----------+-------------+
   |    Data Element    | Most Popular Label |   No. of  |    No. of   |
   |                    |                    |    TLDs   |    Labels   |
   +--------------------+--------------------+-----------+-------------+
   |    Billing Name    |        Name        |     47    |      5      |
   +--------------------+--------------------+-----------+-------------+
   |    Billing Fax     |        Fax         |     43    |      6      |
   +--------------------+--------------------+-----------+-------------+
   |   Billing Email    |   Email Address    |     42    |      7      |
   +--------------------+--------------------+-----------+-------------+
   |  Billing Country   |      Country       |     38    |      4      |
   |        Code        |                    |           |             |
   +--------------------+--------------------+-----------+-------------+
   |   Billing Phone    |    Phone Number    |     34    |      6      |
   +--------------------+--------------------+-----------+-------------+
   |     Billing ID     |     Billing ID     |     28    |      9      |
   +--------------------+--------------------+-----------+-------------+
   |    Billing City    |    Billing City    |     28    |      4      |
   +--------------------+--------------------+-----------+-------------+
   |      Billing       |      Billing       |     28    |      5      |
   |    Organization    |    Organization    |           |             |
   +--------------------+--------------------+-----------+-------------+
   |   Billing Postal   |   Billing Postal   |     27    |      4      |
   |        Code        |        Code        |           |             |
   +--------------------+--------------------+-----------+-------------+
   |      Billing       |      Billing       |     21    |      4      |
   |   State/Province   |   State/Province   |           |             |
   +--------------------+--------------------+-----------+-------------+
   |   Billing Street   |  Billing Street1   |     19    |      13     |
   +--------------------+--------------------+-----------+-------------+
   |  Billing Country   |  Billing Country   |     13    |      5      |
   +--------------------+--------------------+-----------+-------------+
   | Billing Phone Ext. | Billing Phone Ext. |     10    |      2      |
   +--------------------+--------------------+-----------+-------------+
   |  Billing Fax Ext   |  Billing Fax Ext   |     10    |      2      |
   +--------------------+--------------------+-----------+-------------+

                        Table 10.  Billing Contact

   Among all the data elements, there are no elements supported by more
   than one half of registries and those registries.  Those supported by more than one third
   of registries are "Billing Name", "Billing Fax" Fax", and "Billing Email".

5.2.3.  WHOIS Data for Nameservers

   114 registries (about 92% of all the 124 registries) have the
   "nameserver" data element in their WHOIS responses.  However, there
   are 63 different labels for this element, just as shown in table Table 11.  The
   top three labels for this element are "Name Server" which (which is
   supported by 25% of all the registries, registries), "Name Servers" which (which is
   supported by 16% of all the registries registries), and "nserver" which (which is
   supported by 12% of all the registries. registries).

    +--------------+--------------------+-------------+---------------+
    | Data Element | Most Popular Label | No. of TLDs | No. of Labels |
    +--------------+--------------------+-------------+---------------+
    |  NameServer  |    Name Server     |     114     |       63      |
    +--------------+--------------------+-------------+---------------+

                   Table 11.  WHOIS Data for Nameservers

   Some registries have nameserver elements such like "nameserver 1",
   "nameserver 2" till "nameserver n".  Thus, there are more labels than
   of other data elements.

5.2.4.  WHOIS Data for Registrars

   There are three data elements about registrar information.

   +-------------------+---------------------+-----------+-------------+
   |    Data Element   |  Most Popular Label |   No. of  |    No. of   |
   |                   |                     |    TLDs   |    Labels   |
   +-------------------+---------------------+-----------+-------------+
   |     Sponsoring    |      Registrar      |     84    |      6      |
   |     Registrar     |                     |           |             |
   +-------------------+---------------------+-----------+-------------+
   |     Created by    |      Created by     |     14    |      3      |
   |     Registrar     |                     |           |             |
   +-------------------+---------------------+-----------+-------------+
   |     Updated by    |   Last Updated by   |     11    |      3      |
   |     Registrar     |      Registrar      |           |             |
   +-------------------+---------------------+-----------+-------------+

                   Table 12.  WHOIS Data for Registrars

   67.7% of the registries have the "Sponsoring Registrar" data element.
   Elements such as
   The elements "Created by Registrar" and "Updated by Registrar" are
   supported by 11.3% and 8.9% of the registries. registries, respectively.

5.3.  Other Objects

   So-called "other objects" are those data elements that are privately
   specified or are difficult to be classified.  There are 392 other
   objects altogether.  The table  Table 13 lists the top 50 other objects
   according to the found
   during data collection result. collection.

            +----------------------------------------+-------------+
            |              Data Element              | No. of TLDs |
            +----------------------------------------+-------------+
            |               Registrant               |      41     |
            +----------------------------------------+-------------+
            |                 Phone                  |      32     |
            +----------------------------------------+-------------+
            |           Technical contact            |      26     |
            +----------------------------------------+-------------+
            |         Administrative contact         |      15     |
            +----------------------------------------+-------------+
            |                 source                 |      14     |
            +----------------------------------------+-------------+
            |                 fax-no                 |      13     |
            +----------------------------------------+-------------+
            |                nic-hdl                 |      13     |
            +----------------------------------------+-------------+
            |            Billing Contact             |      12     |
            +----------------------------------------+-------------+
            |              referral url              |      11     |
            +----------------------------------------+-------------+
            |                 e-mail                 |      10     |
            +----------------------------------------+-------------+
            |              WHOIS server              |      9      |
            +----------------------------------------+-------------+
            |             Admin Contact              |      9      |
            +----------------------------------------+-------------+
            |                  Type                  |      9      |
            +----------------------------------------+-------------+
            |                Website                 |      9      |
            +----------------------------------------+-------------+
            |                 zone-c                 |      8      |
            +----------------------------------------+-------------+
            |                remarks                 |      7      |
            +----------------------------------------+-------------+
            |            Registration URL            |      6      |
            +----------------------------------------+-------------+
            |               anonymous                |      6      |
            +----------------------------------------+-------------+
            |              anniversary               |      6      |
            +----------------------------------------+-------------+
            |                  hold                  |      6      |
            +----------------------------------------+-------------+
            |                 nsl-id                 |      6      |
            +----------------------------------------+-------------+
            |               obsoleted                |      6      |
            +----------------------------------------+-------------+
            |        Customer Service Contact        |      5      |
            +----------------------------------------+-------------+
            |         Customer Service Email         |      4      |
            +----------------------------------------+-------------+
            |              Registrar ID              |      4      |
            +----------------------------------------+-------------+
            |                  org                   |      4      |
            +----------------------------------------+-------------+
            |                 person                 |      4      |
            +----------------------------------------+-------------+
            |               Maintainer               |      4      |
            +----------------------------------------+-------------+
            |                 Nombre                 |      3      |
            +----------------------------------------+-------------+
            |      Sponsoring Registrar IANA ID      |      3      |
            +----------------------------------------+-------------+
            |            Trademark Number            |      3      |
            +----------------------------------------+-------------+
            |           Trademark Country            |      3      |
            +----------------------------------------+-------------+
            |                 descr                  |      3      |
            +----------------------------------------+-------------+
            |                  url                   |      3      |
            +----------------------------------------+-------------+
            |             Postal address             |      3      |
            +----------------------------------------+-------------+
            |             Registrar URL              |      3      |
            +----------------------------------------+-------------+
            |           International Name           |      3      |
            +----------------------------------------+-------------+
            |         International Address          |      3      |
            +----------------------------------------+-------------+
            |             Admin Contacts             |      2      |
            +----------------------------------------+-------------+
            |          Contractual Language          |      2      |
            +----------------------------------------+-------------+
            |       Date Trademark Registered        |      2      |
            +----------------------------------------+-------------+
            |       Date Trademark Applied For       |      2      |
            +----------------------------------------+-------------+
            |               IP Address               |      2      |
            +----------------------------------------+-------------+
            |                  Keys                  |      2      |
            +----------------------------------------+-------------+
            |                Language                |      2      |
            +----------------------------------------+-------------+
            |               NIC handle               |      2      |
            +----------------------------------------+-------------+
            |          Record maintained by          |      2      |
            +----------------------------------------+-------------+
            |     Registration Service Provider      |      2      |
            +----------------------------------------+-------------+
            |    Registration Service Provided By    |      2      |
            +----------------------------------------+-------------+
            | Registrar URL (registration services)  |      2      |
            +----------------------------------------+-------------+

                    Table 13.  The Top 50 Other Objects

   Some registries returned things that looked like labels, but were
   not.  For example, in this reply:

         Registrant:
           Name:
           Email:
           ...

   "Name" and "Email" appeared to be data elements, but "Registrant" was did
   not.  The inventory work proceeded on that assumption, i.e., there
   were two data elements to be recorded in this example.

   Some other data elements, like "Remarks", "anniversary" "anniversary", and
   "Customer service Contact" etc., Contact", are designed particularly for their own
   purpose by different registries.

5.4.  Conclusion

5.4.1.  Preliminary Statistics

   Some preliminary conclusions could be drawn from the raw data.

   o  All of the 124 domain registries have the object names in their
      responses
      responses, although they are in various formats.

   o  Of the 118 WHOIS services contacted, 65 registries show their
      registrant contact.  About half of the registries (60 registries)
      support admin contact information.  There are 47 registries, which
      is about one third of the total number, that have technical and
      billing contact information.  Only seven of all the 124 registries
      give their abuse email in a "remarks" section.  No explicit abuse
      contact information is provided.

   o  There are mainly two presentation formats.  One is key:value, key-value; the
      other is data block format.  Example of key-value format:

   Domain Information
   Query: nic.example.com
   Status: Delegated
   Created: 17 Apr 2004
   Modified: 14 Nov 2010
   Expires: 31 Dec 9999
   Name Servers: ns.example.net
   ns1.na.example.net
   ns2.na.example.net
   ...

      Example of data block format:

  WHOIS database
  domain nic.example.org

  Domain Name nic.example.org
  Registered 1998-09-02
  Expiry 2012-09-02

  Resource Records

  a   198.51.100.1
  mx 10 test.example.net
  www a   198.51.100.10

  Contact details

  Registrant,
  Technical Contact,
  Billing Contact,
  Admin. Contact AdamsNames Reserved Domains (i)
  These domains are not available for registration
  United Kingdom
  Identifier: test123

  Servidor WHOIS de NIC-Example

  Este servidor contiene informacion autoritativa exclusivamente de
  dominios nic.example.org Cualquier consulta sobre este servicio, puede
  hacerla al correo electronico whois@nic.example.org

  Titular:
  John (nic.example.org) john@nic.example.org
  NIC Example
  Av. Veracruz con calle Cali, Edif Aguila, Urb. Las Mercedes
  Caracas, Distrito Capital VE
  0212-1234567 (FAX) +582123456789

   o  11 registries give local script responses.  The WHOIS information
      of other registries are all represented in English.

5.4.2.  Data Elements Element Analysis

   The top 10 data elements are listed in table 14: Table 14.

                     +----------------------+-------------+
                     |     Data Element     | No. of TLDs |
                     +----------------------+-------------+
                     |     Domain Name      |     118     |
                     +----------------------+-------------+
                     |     Name Server      |     114     |
                     +----------------------+-------------+
                     |    Creation Date     |     106     |
                     +----------------------+-------------+
                     |    Domain Status     |      95     |
                     +----------------------+-------------+
                     | Sponsoring Registrar |      84     |
                     +----------------------+-------------+
                     |   Expiration Date    |      81     |
                     +----------------------+-------------+
                     |     Updated Date     |      70     |
                     +----------------------+-------------+
                     |   Registrant Name    |      65     |
                     +----------------------+-------------+
                     |     Admin Street     |      64     |
                     +----------------------+-------------+
                     |      Admin Name      |      60     |
                     +----------------------+-------------+

                    Table 14.  The Top 10 Data Elements

   Most of the domain related domain-related WHOIS information is included in the top
   10 data elements.  Other information like name server and registrar
   name are is also supported by most registries.

   A cumulative distribution analysis of all the data elements was done.

   (1)  About 5% of the data elements discovered by the inventory work
        are supported by over 111 (90%) registries. registries (i.e., 90%).

   (2)  About 30% of the data elements discovered by the inventory work
        are supported by over 44 (35%) registries. registries (i.e., 35%).

   (3)  About 60% of the data elements discovered by the inventory work
        are supported by over 32 (26%) registries. registries (i.e., 26%).

   (4)  About 90% of the data elements discovered by the inventory work
        are supported by over 14 (11%) registries. registries (i.e., 11%).

   From the above result, it is clear that only a few registries support
   all the public objects, most of the registries support just some of
   all
   the objects.

5.4.3.  Labels  Label Analysis

   The top 10 labels of different data elements include: are listed in Table 15.

                      +-------------------+---------------+
                      |       Labels      | No. of Labels |
                      +-------------------+---------------+
                      |    Name Server    |       63      |
                      +-------------------+---------------+
                      |   Creation Date   |       24      |
                      +-------------------+---------------+
                      |  Expiration Date  |       21      |
                      +-------------------+---------------+
                      |    Updated Date   |       20      |
                      +-------------------+---------------+
                      |    Admin Street   |       19      |
                      +-------------------+---------------+
                      |      Tech ID      |       18      |
                      +-------------------+---------------+
                      | Registrant Street |       16      |
                      +-------------------+---------------+
                      |      Admin ID     |       16      |
                      +-------------------+---------------+
                      |    Tech Street    |       16      |
                      +-------------------+---------------+
                      |   Billing Street  |       13      |
                      +-------------------+---------------+

                       Table 15.  The Top 10 Labels

   As explained above, the "Name Server" label is a unique example that
   because many registries define the name server elements from
   "nameserver 1"
   till through "nameserver n".  Thus, the count of labels for
   name servers is much higher than other elements.  Data elements
   representing dates and street addresses were also common.

   A cumulative distribution analysis of label numbers was done.  About
   90% of data elements have more than two labels.  It is therefore
   necessary to specify a standard and unified format for object names
   in a WHOIS response.

5.4.4.  Analysis of Other Objects Analysis

   The results indicate that there are 392 other data objects in total
   that are not easy to be classified or are privately defined by
   various registries.  The top 50 other objects are listed in the table Table 13
   in section 4.3. Section 5.3.  It is clear that various different objects are
   designed for some particular purpose.  In order to ensure uniqueness
   of JSON names used in the RDAP service, establishment of an IANA
   registry is advised.

5.5.  Limitations

   This section enumerates lists the limitations of the survey and some assumptions
   that were made in the execution of this work.

   o  The input "nic.ccTLD" maybe is may not be a good choice, for the term "nic"
      is often specially used by the corresponding ccTLD ccTLD, so the
      collected WHOIS data may be customized and different from the
      common data.

   o  Since the programming script queried the "nic.ccTLD" in an
      anonymous way, only the public WHOIS data from WHOIS servers
      having nic.ccTLD were collected.  So  So, the private WHOIS data were
      not covered by this document.

   o  11 registries did not provide responses in English.  The
      classification of data elements within their responses may not be
      accurate.

   o  The extension data elements are used randomly by different
      registries.  It is difficult to do statistical analysis.

   o  Sample sizes of contact, name server server, and registrar queries are
      small.

      *  Only WHOIS queries for contact ID, nameserver nameserver, and registrar
         were used.

      *  Some registries may not support contact, name server server, or
         registrar queries.

      *  Some may not support query contact by ID.

      *  Contact information of some registries may be protected.

6.  Reference Extension Objects

   There are some objects that are included in the existing WHOIS system
   but not mentioned in [I-D.ietf-weirds-json-response]. [RFC7483].  This document is intended to give a
   list of reference extension objects for discussion.

6.1.  RIR Reference Extension Objects

   o  company -- - the company name registered by the registrant.

   o  maintainer -- - authentication information that identifies who can
      modify the contents of this object.

   o  list of resources -- - a list of IPv4 addresses, IPv6 addresses addresses, and
      Autonomous System numbers.

   o  referral NOC contact -- - the Network Operation Operations Center contact.

6.2.  DNR Reference Extension Objects

   The following objects are selected from the top 50 other objects in
   section
   Section 5.3 that are supported by more than five registries.  These
   objects are considered as possible extension objects.

   o  zone-c -- - The identifier of a 'role' object with authority over a
      zone.

   o  maintainer -- - authentication information that identifies who can
      modify the contents of this object.

   o  Registration URL -- - typically the website address of a registry.

   o  anonymous -- - whether the registration information is anonymous or
      not.

   o  hold -- - whether the domain is "on hold" or not.

   o  nsl-id -- - nameserver list ID.

   o  obsoleted -- - whether a domain is obsoleted or not.

   o  Customer Service Contact -- - a kind of contact.

7.  IANA Considerations

   This document does not specify any IANA actions.  [RFC Editor: Please
   delete this section prior to publication.]

8.  Security considerations Considerations

   This document does not provide any other security services or introduce any
   additional considerations.

10. considerations to those discussed in [RFC7481].

8.  Informative References

   [ICANN.AGB-201206]
              ICANN, "gTLD Applicant Guidebook", June 2012,
              <http://newgtlds.icann.org/en/applicants/agb/
              guidebook-full-04jun12-en.pdf>.

   [RFC2622]  Alaettinoglu, C., Villamizar, C., Gerich, E., Kessens, D.,
              Meyer, D., Bates, T., Karrenberg, D., and M. Terpstra,
              "Routing Policy Specification Language (RPSL)", RFC 2622,
              June 1999. 1999, <http://www.rfc-editor.org/info/rfc2622>.

   [RFC3912]  Daigle, L., "WHOIS Protocol Specification", RFC 3912,
              September 2004. 2004, <http://www.rfc-editor.org/info/rfc3912>.

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

   [RFC5731]  Hollenbeck, S., "Extensible Provisioning Protocol (EPP)
              Domain Name Mapping", STD 69, RFC 5731, August 2009. 2009,
              <http://www.rfc-editor.org/info/rfc5731>.

   [RFC5732]  Hollenbeck, S., "Extensible Provisioning Protocol (EPP)
              Host Mapping", STD 69, RFC 5732, August 2009. 2009,
              <http://www.rfc-editor.org/info/rfc5732>.

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

   [RFC5890]  Klensin, J., "Internationalized Domain Names for
              Applications (IDNA): Definitions and Document Framework",
              RFC 5890, August 2010.

   [I-D.ietf-weirds-using-http] 2010,
              <http://www.rfc-editor.org/info/rfc5890>.

   [RFC7480]  Newton, A., Ellacott, B., and N. Kong, "HTTP usage Usage in the
              Registration Data Access Protocol (RDAP)", draft-ietf-
              weirds-using-http-13 (work in progress), October 2014.

   [I-D.ietf-weirds-rdap-query] RFC 7480,
              February 2015, <http://www.rfc-editor.org/info/rfc7480>.

   [RFC7481]  Hollenbeck, S. and N. Kong, "Security Services for the
              Registration Data Access Protocol (RDAP)", RFC 7481,
              February 2015, <http://www.rfc-editor.org/info/rfc7481>.

   [RFC7482]  Newton, A. and S. Hollenbeck, "Registration Data Access
              Protocol (RDAP) Query Format", draft-ietf-weirds-rdap-query-15
              (work in progress), October 2014.

   [I-D.ietf-weirds-json-response] RFC 7482, February 2015,
              <http://www.rfc-editor.org/info/rfc7482>.

   [RFC7483]  Newton, A. and S. Hollenbeck, "JSON Responses for the
              Registration Data Access Protocol (RDAP)", draft-ietf-
              weirds-json-response-10 (work in progress), October 2014.

   [I-D.ietf-weirds-bootstrap] RFC 7483,
              February 2015, <http://www.rfc-editor.org/info/rfc7483>.

   [RFC7484]  Blanchet, M., "Finding the Authoritative Registration Data
              (RDAP) Service", draft-ietf-weirds-bootstrap-09 (work in
              progress), October 2014.

   [Stat-Data-File]
              Kong, N., Zhou, L., and G. Deng, "WHOIS Statistics Data
              File", July 2012, <https://docs.google.com/
              open?id=0B96TtoK8a--MTTRuVUt3UHZMdEk>. RFC 7484, February 2015,
              <http://www.rfc-editor.org/info/rfc7484>.

Appendix A.  Change Log

   Initial -00:  Adopted as working group document.

   -01:

      *  Added Change Log section.

      *  Added RIR data objects.

      *  Exchanged section 2 and section 3.

   -02:

      *  Modified some object names in the section of RIR Objects
         Analysis.

      *  Added reference extension objects.

   -03:

      *  Updated to the keep-alive version.  Changed the expiry dates
         and the draft number.

   -04:

      *  Updated based on Murray's and Edward's comments during the WG
         last call.

   -05:

      *  Addressed AD feedback.

   -06:

      *  Addressed IETF Last Call comments.

9.  Acknowledgements

   This document is the work product of the IETF's WEIRDS working group,
   of which Olaf Kolkman and Murray Kucherawy were chairs.

   The authors especially thank the following individuals who gave their
   suggestions and contributions to this document: Guangqing Deng,
   Frederico A C Neves, Ray Bellis, Edward Shryane, Kaveh Ranjbar,
   Murray Kucherawy, Edward Lewis, Pete Resnick, Juergen Schoenwaelder,
   Ben Campbell Campbell, and Claudio Allocchio.

Authors' Addresses

   Linlin Zhou
   CNNIC
   4 South 4th Street, Zhongguancun, Haidian District
   Beijing,
   Beijing  100190
   China

   Phone: +86 10 5881 2677
   Email:
   EMail: zhoulinlin@cnnic.cn

   Ning Kong
   CNNIC
   4 South 4th Street, Zhongguancun, Haidian District
   Beijing,
   Beijing  100190
   China

   Phone: +86 10 5881 3147
   Email:
   EMail: nkong@cnnic.cn

   Sean Shen
   CNNIC
   4 South 4th Street, Zhongguancun, Haidian District
   Beijing,
   Beijing  100190
   China

   Phone: +86 10 5881 3038
   Email:
   EMail: shenshuo@cnnic.cn
   Steve Sheng
   ICANN
   12025 Waterfront Drive, Suite 300
   Los Angeles, CA  90094-2536
   USA
   United States

   Phone: +1 310 301 5800
   Email:
   EMail: steve.sheng@icann.org

   Arturo Servin
   LACNIC
   Rambla Mexico 6125
   Montevideo,
   Montevideo  11400
   Uruguay

   Phone: +598-2604-2222
   Email: aservin@lacnic.net
   EMail: arturo.servin@gmail.com