Appendix B. The Whois DTD
From: http://search.ietf.org/internet-drafts/draft-wesson-whois-export-03.txt
Date: 2001--8-13


   <?xml version="1.0"?>
   <!--

             "-//Rick H. Wesson//DTD for WHOIS Export//EN"

             A DTD for exporting whois data, ICANN Data Escrow in XML and
             providing a means to query XML enabled Whois servers for XML
             responses.


             -anonymous
             The only new thing in this world,
             is the history you don't know.

   -->


       <!ELEMENT whois (domain|contact|ns)*>
       <!ATTLIST whois
           version   CDATA  #FIXED "1.0"
           registrar CDATA  #REQUIRED
           referal   CDATA  #IMPLIED >


       <!ELEMENT escrow (domain|contact|ns)*>
       <!ATTLIST escrow
           version   CDATA  #FIXED "1.0"
           registrar CDATA  #REQUIRED
           date      CDATA  #REQUIRED >

       <!-- ns objects represent (hosts) DNS Servers -->
       <!ELEMENT ns ((ip)*, contact?)?>

       <!-- ns Name Service
           this container must be either be primary or secondary,
           as domains require no less than one primary and one secondary. -->

       <!ATTLIST ns
           id      ID      #IMPLIED
           ref     IDREF   #IMPLIED
           handle  CDATA        #IMPLIED
           name    CDATA   #IMPLIED >

       <!ELEMENT ip             (#PCDATA) >
       <!ATTLIST ip


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           type    (ipv4 | ipv6) "ipv4"  >

       <!ELEMENT created                (#PCDATA) >
       <!ATTLIST created
           date   CDATA    #REQUIRED >

       <!ELEMENT expires                (#PCDATA) >
       <!ATTLIST expires
           date   CDATA    #REQUIRED >


       <!-- the line is an alternate method of specifying an unformatted
         address listing. -->
       <!ELEMENT line   (#PCDATA) >

       <!-- the address container stores formatted or unformatted postal
         postal (snail mail) address of organizations and contacts -->

        <!ELEMENT address (line*|
                          (street*,(city,(state)?)?,
                           postalcode,country))?>



       <!-- Contact Object.
         The contact is the owner of all host and domain objects in the srs.
         Contacts are used for billing purposes, finding responsible parties
         for the objects, and for ownership and authenticating modification
         requests. -->
       <!ELEMENT contact (name,title?,organization?,address?,voice?,fax?,email?)?>

       <!--                    attributes for a contact object            -->
       <!ATTLIST contact
                  id            ID                                #IMPLIED
                 ref           IDREF             #IMPLIED
                  handle            CDATA                         #IMPLIED
                  type          ( admin   |
                                 tech    |
                                 billing |
                                 zone      ) #IMPLIED>


       <!-- contact elements -->
       <!ELEMENT        name                (#PCDATA) >
       <!ELEMENT        title               (#PCDATA) >
       <!ELEMENT        organization    (name,address) >
       <!ELEMENT        street              (#PCDATA) >
       <!ELEMENT        city                (#PCDATA) >
       <!ELEMENT        state               (#PCDATA) >


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       <!ELEMENT   postalcode       (#PCDATA) >
       <!ELEMENT        country             (#PCDATA) >
       <!ELEMENT        voice               (#PCDATA) >
       <!ELEMENT        fax                 (#PCDATA) >
       <!ELEMENT        email               (#PCDATA) >
       <!ELEMENT        extentions      (#PCDATA) >

       <!-- The Domain contains references to host objects for building
            the root's zone files,
             references to contacts for billing, authentication and delegation
             of responsible parties. -->

       <!ELEMENT domain ((organization?)?, (ns*)?, contact*,
                           created?, expires?, extentions?)>

       <!ATTLIST domain
           fqdn CDATA   #REQUIRED
           status       ( registrar_hold | registrar_lock
                     registry_hold  | registry_lock
                                    | active           ) "active" >


       <!-- query elements -->
       <!ELEMENT query (handle)?, name?, fqdn?>
       <!ATTLIST query
           VERSION CDATA   #FIXED "1.0"
           type    (domain | nameserver | registrar | contact | any) "any"
           flags   (local | full ) "local" >