Network Working Group                                          A. Newton
Request for Comments: 4414                                VeriSign, Inc.
Category: Standards Track                                  February 2006

An ENUM Registry Type
for the Internet Registry Information Service (IRIS)

Status of This Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (2006).

Abstract

   This document describes an Internet Registry Information Service
   (IRIS) registry schema for registered ENUM information.  The schema
   extends the necessary query and result operations of IRIS to provide
   the functional information service needs for syntaxes and results
   used by ENUM registries.

   1. Introduction ....................................................3
   2. Document Terminology ............................................3
   3. Schema Description ..............................................3
      3.1. Query Derivatives ..........................................3
           3.1.1. <findEnumsByE164> Query .............................3
           3.1.2. <findEnumsByContact> Query ..........................4
           3.1.3. <findContacts> Query ................................4
           3.1.4. <findEnumsByHost> Query .............................4
           3.1.5. Contact Search Group ................................5
      3.2. Result Derivatives .........................................5
           3.2.1. Privacy Labels ......................................5
           3.2.2. Contact Group .......................................7
           3.2.3. <enum> Result .......................................8
           3.2.4. <host> Result ......................................12
           3.2.5. <contact> Result ...................................13
           3.2.6. <registrationAuthority> Result .....................15
           3.2.7. <validationEntity> Result ..........................16
           3.2.8. <communicationServiceProvider> Result ..............17
           3.2.9. <validationEvent> Result ...........................18
      3.3. Generic Code Derivatives ..................................19
           3.3.1. <searchTooWide> ....................................19
           3.3.2. <languageNotSupported> .............................19
      3.4. Support for <iris:lookupEntity> ...........................19
   4. Formal XML Syntax ..............................................21
   5. Blocks Extensible Exchange Protocol (BEEP) Transport
      Compliance .....................................................46
      5.1. Message Pattern ...........................................46
      5.2. Server Authentication .....................................46
   6. URI Resolution .................................................46
      6.1. Application Service Label .................................46
   7. Internationalization Considerations ............................46
   8. IANA Considerations ............................................47
      8.1. XML Namespace URN Registration ............................47
      8.2. S-NAPTR Registration ......................................48
      8.3. BEEP Registration .........................................48
   9. Security Considerations ........................................48
   10. Normative References ..........................................48
   A.  Contributions and Acknowledgements ............................50

1. Introduction

   This document describes an IRIS registry schema for registries of
   ENUM data using an XML Schema [4] derived from and using the IRIS [5]
   schema.

   The schema given is this document is specified using the Extensible
   Markup Language (XML) 1.0 as described in XML [1], XML Schema
   notation as described in XML_SD [3] and XML_SS [4], and XML
   Namespaces as described in XML_NS [2].

2. Document Terminology

   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 [10].

   This document uses the term "ENUM" as the fully qualified domain name
   following the conventions of ENUM [17].

3. Schema Description

   IRIS requires the derivation of both query and result elements by a
   registry schema.  These descriptions follow.

   References to XML elements with no namespace qualifier are from the
   schema defined in Section 4.  References to elements and attributes
   with the "iris" XML namespace qualifier are from the schema defined
   in IRIS [5].

   The descriptions contained within this section refer to XML elements
   and attributes and their relation to the exchange of data within the
   protocol.  These descriptions also contain specifications outside the
   scope of the formal XML syntax.  Therefore, this section will use
   terms defined by RFC 2119 [10] to describe the specification outside
   the scope of the formal XML syntax.  While reading this section,
   please reference Section 4 for needed details on the formal XML
   syntax.

3.1. Query Derivatives

3.1.1. <findEnumsByE164> Query

   <findEnumsByE164> finds ENUM domains by searching on prefixes of
   E.164 numbers and returns <enum> (Section 3.2.3) results.

   The E.164 prefix is specified using the <e164Prefix> child of
   <findEnumsByE164>.  An optional child element of <findEnumsByE164>,

   <specificity>, can narrow the search to ENUM domains associated with
   E.164 numbers that are either more specific or less specific.  If the
   <specificity> element is present and has the content 'less', then the
   search is to be narrowed to E.164 numbers that are less specific
   (i.e., have fewer digits).  If the <specificity> element is present
   and has the content 'more', then the search is to be narrowed to
   E.164 numbers that are more specific (i.e., have more digits).

3.1.2. <findEnumsByContact> Query

   <findEnumsByContact> finds ENUM domains by searches on fields
   associated with an ENUM domain's contact.

   The allowable search fields are handled with either the
   <contactHandle> element or one of the elements in the
   "contactSearchGroup" (see Section 3.1.5).  The <contactHandle>
   element allows for the ENUM domains to be selected based on the
   contact having the specified contact handle.

   The query MAY also be constrained further using the optional <role>
   element.  The contents of this element signify the role the contact
   has with the ENUM domain.

   This query also provides optional <language> elements containing
   language tags.  Clients MAY use these elements to give a hint about
   the natural language(s) of the affected element.  Servers MAY use
   this information in processing the query, such as tailoring
   normalization routines to aid in more effective searches.

3.1.3. <findContacts> Query

   <findContacts> searches for contacts given search constraints.

   The allowable search fields are handled by one of the elements in the
   "contactSearchGroup" (see Section 3.1.5).

   This query also provides optional <language> elements containing
   language tags.  Clients MAY use these elements to give a hint about
   the natural language(s) of the affected element.  Servers MAY use
   this information in processing the query, such as tailoring
   normalization routines to aid in more effective searches.

3.1.4. <findEnumsByHost> Query

   This query does a simple search for the ENUM domains being hosted by
   a name server.  The search is constrained using either the host name
   [12], host handle, IPv4 address, or IPv6 address of the name server.

3.1.5. Contact Search Group

   Some of the queries above have similar query constraints for
   searching on contacts.  This section describes those common
   parameters.

   <commonName> allows the query to be constrained based on the common
   name of the contact.  The constraint can either constrain the query
   by an exact match using the <exactMatch> element, or it may constrain
   the query by a subset of the common name using the <beginsWith> and
   <endsWith> elements.

   <organization> allows the query to be constrained based on the
   organization name of the contact.  It has the same semantics as the
   <commonName> element.

   <eMail> constrains the query based on the e-mail address of the
   contact.  This may be done by an exact e-mail address using the
   <exactMatch> element or by any e-mail address in a domain using the
   <inDomain> element.  The <inDomain> MUST only contain a valid domain
   name (i.e., no '@' symbol), and the matching SHOULD take place only
   on the domain given (i.e., no partial matches with respect to
   substrings or parent domains).  If either the contents of the
   <inDomain> element or domain part of the contents of the <exactMatch>
   element contain a name with non-ASCII characters, they MUST be
   normalized according to the processes of RFC 3491 [15].

   The <city>, <region>, and <postalCode> elements restrict the scope of
   the query based on the city, region, or postal code of the contact,
   respectively.  Each one must only contain an <exactMatch> element
   containing the exact city, region, or postal code (i.e., no substring
   searches).

3.2. Result Derivatives

3.2.1. Privacy Labels

   Several of the results in this registry type have values that cannot
   be given but must be specified as present or must be flagged so that
   clients do not divulge them.  In order to achieve this, some of the
   results use the following element types:

   o  "dateTimePrivacyType" - contains the XML Schema [3] data type
      "dateTime".  The contents of this element MUST be specified using
      the 'Z' indicator for Coordinated Universal Time (UTC).

   o  "stringPrivacyType" - contains the XML Schema [3] data type
      "string".

   o  "normalizedStringPrivacyType" - contains the XML Schema [3] data
      type "normalizedString".

   o  "tokenPrivacyType" - contains the XML Schema [3] data type
      "token".

   o  "enumStatusType" - describes a state for an ENUM domain.  This
      element has the following optional attributes:

      *  'scope' - indicates the scope or origin of the status value.

      *  'disposition' - contains either the value "pending", meaning
         that initial processing for this status has begun and is not
         yet complete, or the value "prohibited", meaning this ENUM
         domain cannot achieve this status according to either the
         registry or registrar of this ENUM domain.

      *  'actor' - contains either the value "registry", meaning this
         status value has been associated with this ENUM domain by the
         registry, or the value "registrar", meaning this status value
         has been associated with this ENUM domain by the registrar.

      This element has the following optional child elements:

      *  <appliedDate> - indicates the date and time the status was
         applied.

      *  <description> - provides a textual description of the status.
         This element has a required 'language' attribute.

      *  <subStatus> - indicates a jurisdictional-dependent reason for
         this status value.  This element has a required 'authority'
         attribute to indicate the jurisdictional authority associated
         with this sub-status.

   o  "contactTypeType" - contains an optional <description> child
      elements.  Each <description> child element requires a 'language'
      attribute.

   As specified, they are nillable and therefore may be present with
   empty content or present with their specified content.  The use of
   these elements is also optional.

   If present without content, each of these element types MUST have one
   or more of the following boolean attributes:

   o  'private' - if true, this specifies that the content is absent
      because it may never be published.

   o  'denied' - if true, this specifies that the content is absent
      because policy does not allow it to be given under the current
      level of access.

   If present with content, each of these element types MAY have one or
   more of the following boolean attributes:

   o  'doNotRedistribute' - if true, this specifies that the content is
      not to be redistributed.

   o  'specialAccess' - if true, this specifies that the content has
      been provided due to special access rights.

   These boolean attributes SHOULD be used in accordance with the level
   of access being granted the recipient of the data.  For example,
   marking data as 'private' or 'denied' is to be expected if the user
   is anonymous or has some other low level of access that does not
   warrant viewing of that particular data.  Likewise, data marked with
   'doNotRedistribute' or 'specialAccess' is to be expected if the user
   is authenticated and has a high level of access.

3.2.2. Contact Group

   Many of the results share a set of references to contacts regarding
   an associated role.  These are represented by the following elements:

   o  <billingContact>

   o  <technicalContact>

   o  <administrativeContact>

   o  <legalContact>

   o  <zoneContact>

   o  <abuseContact>

   o  <securityContact>

   o  <otherContact>

   Each of these elements contains an entity reference.  The referent of
   each MUST be a <contact> (Section 3.2.5).

3.2.3. <enum> Result

   An example of a <enum> result:

     <enum
       authority="3.0.7.1.e164.arpa" registryType="ereg1"
       entityClass="enum-handle" entityName="555-1234.001" >

       <e164Number>+1 703 555 1234</e164Number>

       <nameServer
           iris:referentType="ereg:host"
           authority="3.0.7.1.e164.arpa" registryType="ereg1"
           entityClass="host-handle" entityName="ns1.001" />
       <nameServer
           iris:referentType="ereg:host"
           authority="3.0.7.1.e164.arpa" registryType="ereg1"
           entityClass="host-handle" entityName="ns2.001" />

       <registrant
         iris:referentType="ereg:contact"
         authority="3.0.7.1.e164.arpa" registryType="ereg1"
         entityClass="contact-handle" entityName="beb140">
         <iris:displayName language="en">
           Bill Eckels
         </iris:displayName>
       </registrant>

       <technicalContact
         iris:referentType="ereg:contact"
         authority="3.0.7.1.e164.arpa" registryType="ereg1"
         entityClass="contact-handle" entityName="mak21">
         <iris:displayName language="en">
           Mark Kosters
         </iris:displayName>
       </technicalContact>

       <status>
         <create/>
         <active/>
         <delete
           actor="registrar"
           disposition="prohibited">
           <subStatus
             authority="regr.example">
             AUTO-LOCK
           </subStatus>
         </delete>

         <update
           actor="registrar"
           disposition="prohibited">
           <subStatus
             authority="regr.example">
             AUTO-LOCK
           </subStatus>
         </update>
         <transfer
           actor="registrar"
           disposition="prohibited">
           <subStatus
             authority="registrar.example">
             AUTO-LOCK
           </subStatus>
         </transfer>
         <redemptionPeriod
           actor="registry"
           disposition="pending">
           <subStatus
             authority="policy-body.example">
             STANDARD RGP
           </subStatus>
         </redemptionPeriod>
       </status>

     </enum>

   The <enum> result represents an instance of an ENUM domain
   assignment.  The children of the <enum> element are as follows:

   o  <e164Number> - the E.164 number for this ENUM domain as defined by
      [13].  It is RECOMMENDED that only space characters be used
      between the digits of these E.164 numbers, as of the international
      number format defined in [14].

   o  <enumHandle> - a registry-unique assigned identifier to an ENUM
      domain.

   o  <nameServer> - MUST contain an entity reference to a referent of
      type <host> (Section 3.2.4).

   o  <registrant> - elements containing an entity reference to the
      registrant of this ENUM domain.  The referent MUST be a <contact>
      (Section 3.2.5) result.

   o  ENUM domain contacts - see Section 3.2.2.

   o  <status> - may contain at least one of the following elements of
      type 'enumStatusType' (see Section 3.2.1).

      *  <reserved> - this ENUM domain falls outside the normal
         registration rules and/or processes for registration

      *  <create> - assigned to a registrant

      *  <active> - available via DNS (either via delegation or direct
         publication)

      *  <inactive> - unavailable via DNS

      *  <dispute> - registrant assignment is in dispute

      *  <delete> - registrant assignment removed

      *  <transfer> - change of authority

      *  <update> - modification of this ENUM domain

      *  <renew> - renewal of ENUM domain registration

      *  <addPeriod> - period at the creation or activation of this ENUM
         domain (see RFC 3915 [18])

      *  <renewPeriod> - period at the renewal of this ENUM domain (see
         RFC 3915 [18])

      *  <autoRenewPeriod> - period at the automatic renewal of this
         ENUM domain (see RFC 3915 [18])

      *  <transferPeriod> - period at the transfer of this ENUM domain
         (see RFC 3915 [18])

      *  <redemptionPeriod> - period at the redemption of this ENUM
         domain (see RFC 3915 [18])

      *  <restore> - change to previous status of this ENUM domain

      *  <other> - a status only defined by its <subStatus> child
         element

      As stated in Section 3.2.1, each status value may have flags to
      indicate the entity responsible for assigning the status (e.g.,
      actor='registrar') and the nature of the status (e.g.,
      disposition="prohibited").  Any one status value MUST NOT imply
      other status values.  For instance, <reserved> is just an

      indication that the ENUM domain is given special reserved
      status; the <create disposition="prohibited"/> status value must
      also be present to indicate that the ENUM domain cannot be
      registered.

   o  <registrationReference> - an element containing an entity
      reference, the referent of which MUST be an <enum>
      (Section 3.2.3).  The intention of this element is to point to the
      downstream registration reference.  Therefore, if this is a result
      given back by an ENUM domain registry, it should point to the ENUM
      domain in the ENUM domain registrar or registrant service.

   o  <registry> - contains an entity reference specifying the ENUM
      domain registry operator for this ENUM domain that MUST be a
      <registrationAuthority> (Section 3.2.6).

   o  <registrar> - contains an entity reference specifying the ENUM
      domain registrar operator for this ENUM domain that MUST be a
      <registrationAuthority> (Section 3.2.6).

   o  <validationEntity> - contains an entity reference specifying the
      validation entity for this ENUM domain that MUST be a
      <validationEntity> (Section 3.2.7).

   o  communication service providers - the following elements contain
      an entity reference with a relationship to the ENUM domain.  The
      referent of each MUST be a <communicationServiceProvider>
      (Section 3.2.8).

      *  <lineCSP>

      *  <signalCSP>

      *  <dataCSP>

      *  <voiceCSP>

      *  <otherCSP>

   o  <validationEvent> -- elements containing an entity reference to
      validation events related to this ENUM domain.  The referent MUST
      be a <validationEvent> (Section 3.2.9).

   o  <initialDelegationDateTime> - an element containing the date and
      time of the initial delegation of this ENUM domain.

   o  <lastRenewalDateTime> - an element containing the date and time of
      last renewal of this ENUM domain.

   o  <expirationDateTime> - an element containing the date and time of
      the expiration of this ENUM domain.

   o  <lastContactModificationDateTime> - specifies the last time a
      contact for the ENUM domain was added or removed.

   o  <lastContactModificationBy> - an element containing an entity
      reference.  The referent MUST be a <contact> (Section 3.2.5)
      responsible for the last addition or removal of a contact for this
      ENUM domain.

   o  <lastDelegationModificationDateTime> - an element containing the
      date and time of the last time one of the nameservers was added or
      removed for the delegation of this ENUM domain.

   o  <lastDelegationModificationBy> - an element containing an entity
      reference.  The referent MUST be a <contact> (Section 3.2.5)
      result and be responsible for the last addition or removal of a
      nameserver for this ENUM domain.

   o  <lastVerificationDateTime> - an element containing the date and
      time of the last time the data for this domain was verified by the
      responsible registration authority.

   o  <iris:seeAlso> - an element containing an entity reference
      specifying a referent that is indirectly associated with this
      domain.

3.2.4. <host> Result

   An example of a <host> result:

   <host
     authority="iana.org" registryType="ereg1"
     entityClass="host-handle" entityName="nsol184" >
     <hostHandle>nsol184</hostHandle>
     <hostName>a.iana-servers.net</hostName>
     <ipV4Address>192.0.2.43</ipV4Address>
     <hostContact
       iris:referentType="ereg:contact"
       authority="iana.org" registryType="ereg1"
       entityClass="contact-handle" entityName="dbarton" />
   </host>

   The <host> element represents an instance of a host registration.
   The children of the <host> element are as follows:

   o  <hostHandle> - a registry-unique assigned identifier for the host.

   o  <hostName> - the fully qualified domain name of the host.  The
      contents of this element are a host name and MUST conform to RFC
      1123 [19].

   o  <ipV4Address> - the content of which MUST conform to a valid
      IP version 4 host address as specified by RFC 791 [8].

   o  <ipV6Address> - the content of which MUST conform to a valid
      IP version 6 host address as specified by RFC 3513 [7].

   o  <hostContact> - an element containing an entity reference
      specifying a contact associated with this host.  The referent MUST
      be <contact> (Section 3.2.5) results.

   o  <createdDateTime> - an element containing the date and time this
      host was created.

   o  <lastModificationDateTime> - an element containing the date and
      time this host was last modified.

   o  <lastVerificationDateTime> - an element containing the date and
      time this data for this host was last verified to be correct by
      the appropriate registration authority.

   o  <iris:seeAlso> - an element containing an entity reference
      specifying a referent that is indirectly associated with this
      host.

3.2.5. <contact> Result

   An example of a <contact> result:

   <contact
     authority="example.org" registryType="ereg1"
     entityClass="contact-handle" entityName="example-admin" >
     <contactHandle>example-admin</contactHandle>
     <commonName>Example.Org Manager</commonName>
     <organization>Internet Assigned Numbers Authority</organization>
     <eMail>res-dom@example.org</eMail>
     <postalAddress>
       <address>123 Mocking Bird Lane</address>
       <city>Some City</city>
       <region>CA</region>
       <postalCode>00000</postalCode>
       <country>US</country>
     </postalAddress>
     <phone>+1234567890</phone>
   </contact>

   The <contact> element represents an instance of a contact
   registration.  The children of the <contact> element are as follows:

   o  <contactHandle> - a registry-unique assigned identifier for this
      contact.

   o  <commonName> - the name of the contact.

   o  <language> - a specification of the language code to use to
      localize the data in this result.

   o  <type> - contains one of the following child elements: <person>,
      <organization>, <role>, or <other>.  Each of these elements is a
      "contactTypeType" as defined in Section 3.2.1.

   o  <organization> - an element containing the organization name of
      the contact.

   o  The <legalId> child element contains a jurisdictional identifier
      of this contact (an example of such an identifier is a national
      taxation ID or a commercial registry number).

   o  <eMail> - elements containing an e-mail address for this contact.

   o  <sip> - elements containing a SIP URI for this contact.

   o  <postalAddress> - elements containing children representing a
      postal address. <postalAddress> has the following children:

      *  <address> - an element containing the street address for this
         contact.

      *  <city> - an element containing the city for this contact.

      *  <region> - an element containing the national region for this
         contact.

      *  <postalCode> - an element containing the postal code for this
         contact.

      *  <country> - an element containing the country for this contact.
         This SHOULD be a 2-letter country code compliant with ISO 3166
         [11].

   o  <phone> - elements containing a voice phone number for this
      contact.  If it begins with a '+' (plus) character, it MUST be a
      number defined by E.164 [13].  The format number defined in E.164
      [13] is RECOMMENDED.

   o  <fax> - elements containing a facsimile phone number for this
      contact.  If it begins with a '+' (plus) character, it MUST be a
      number defined by E.164 [13].  The format number defined in E.164
      [13] is RECOMMENDED.

   o  <createdDateTime> - an element containing the date and time this
      contact was created.

   o  <lastModificationDateTime> - an element containing the date and
      time this contact was last modified.

   o  <lastVerificationDateTime> - an element containing the date and
      time this data for this contact was last verified to be correct by
      the appropriate registration authority.

   o  <translatedContacts> - an element containing an entity reference
      specifying equivalents of this contact that have been translated
      into other languages.  The referent MUST be <contact>
      (Section 3.2.5) results.

   o  <iris:seeAlso> - an element containing an entity reference
      specifying a referent that is indirectly associated with this
      contact.

3.2.6. <registrationAuthority> Result

   An example of a <registrationAuthority> result:

   <registrationAuthority
     authority="iana.org" registryType="ereg1"
     entityClass="registration-authority" entityName="iana" >
     <serviceInstance
       iris:referentType="iris:serviceIdentification"
       authority="iana.org" registryType="ereg1"
       entityClass="iris" entityName="id" />
     <organizationName>
       Internet Assigned Numbers Authority
     </organizationName>
     <registrar />
   </registrationAuthority>

   The <registrationAuthority> result represents an entity capable of
   registering domains.

   The <serviceInstance> child element of <registrationAuthority>
   contains an entity reference pointing to the entity "id" in the
   entity class "iris".

   The <organizationName> child element contains the name of the
   registration authority.

   The <legalId> child element contains an identifier of this
   registration authority (an example of such an identifier is a
   national taxation ID or a commercial registry number).

   The registration authority type child elements, <registry>,
   <registrar>, and <other>, determine the role in which this
   registration authority plays in the process of registering ENUM
   domains.  The intent of this element is to explain the various roles
   a registration authority may have with regards to the authority areas
   pointed to by the <serviceInstance> element.  A client MAY understand
   the relationship of a registration authority with respect to an ENUM
   domain by the placement of the reference in the domain (e.g.,
   <registry> or <registrar>).

   contacts - see Section 3.2.2.

   <iris:seeAlso> - an element containing an entity reference specifying
   a referent that is indirectly associated with this registration
   authority.

3.2.7. <validationEntity> Result

   An example of a <validationEntity> result:

   <validationEntity
     authority="example.org" registryType="ereg1"
     entityClass="validation-entity" entityName="govt" >
     <serviceInstance
       iris:referentType="iris:serviceIdentification"
       authority="example.org" registryType="ereg1"
       entityClass="iris" entityName="id" />
     <organizationName>
       Some Government Authority
     </organizationName>
     <technicalContact
       iris:referentType="iris:contact"
       authority="example.org" registryType="ereg1"
       entityClass="contact-handle" entityName="1234" />
     <administrativeContact
       iris:referentType="iris:contact"
       authority="example.org" registryType="ereg1"
       entityClass="contact-handle" entityName="abc" />
   </validationEntity>

   The <validationEntity> result represents an entity responsible for
   validating ENUM domains against E.164 [13] registrations.

   The <serviceInstance> child element of <validationEntity> contains an
   entity reference pointing to the entity "id" in the entity class
   "iris".

   The <organizationName> child element contains the name of the
   validation authority.

   The <legalId> child element contains an identifier of this validation
   authority (an example of such an identifier is a national taxation ID
   or a commercial registry number).

   contacts - see Section 3.2.2.

   <iris:seeAlso> - an element containing an entity reference specifying
   a referent that is indirectly associated with this validation
   authority.

3.2.8. <communicationServiceProvider> Result

   An example of a <communicationServiceProvider> result:

   <communicationServiceProvider
     authority="bell.example.com" registryType="ereg1"
     entityClass="csp" entityName="bellco" >
     <serviceInstance
       iris:referentType="iris:serviceIdentification"
       authority="bell.example.com" registryType="ereg1"
       entityClass="iris" entityName="id" />
     <organizationName>
       Big Phone Co.
     </organizationName>
     <line />
   </communicationServiceProvider>

   The <communicationServiceProvider> result represents an entity
   providing ENUM domain service.

   The <serviceInstance> child element of <communicationServiceProvider>
   contains an entity reference pointing to the entity "id" in the
   entity class "iris".

   The <organizationName> child element contains the name of the
   registration authority.

   The <legalId> child element contains an identifier of this
   communication service provider (an example of such an identifier is a
   national taxation ID or a commercial registry number).

   The <cspId> child element contains an identifier unique to this
   communication service provider and identifies this communication
   service provider with regard to its operating jurisdiction.

   The child elements, <line>, <signal>, <data>, <voice>, and <other>,
   detail the capabilities of this communication service provider.  The
   capabilities this communication service provider provides to a
   specific ENUM domain are a subset of these capabilities and are
   expressed in the <enum> result using the <lineCSP>, <signalCSP>,
   <dataCSP>, <voiceCSP>, and <otherCSP> entity references.

   contacts - see Section 3.2.2.

   <iris:seeAlso> - an element containing an entity reference specifying
   a referent that is indirectly associated with this communication
   service provider.

3.2.9. <validationEvent> Result

   An example of a <validationEvent> result:

   <validationEvent
     authority="example.com" registryType="ereg1"
     entityClass="validation-event" entityName="xyz-0123" >
     <serial>xyz-0123</serial>
     <validationEntity
       iris:referentType="ereg:validationEntity"
       authority="bell.example.com" registryType="ereg1"
       entityClass="iris" entityName="id" />
   </validationEvent>

   The <validationEvent> result represents a record of validation for an
   ENUM domain.

   The <serial> child element contains an identifier identifying this
   validation event between a validation entity and a registrar.

   The <methodId> child element contains an identifier describing the
   method used for validation.

   <registrar> - contains an entity reference specifying the ENUM domain
   registrar operator for this validation event that MUST be a
   <registrationAuthority> (Section 3.2.6).

   <validationEntity> - contains an entity reference specifying the
   validation entity for this validation event that MUST be a
   <validationEntity> (Section 3.2.7).

   <executionDateTime> - an element containing the date and time of the
   creation of this validation event.

   <expirationDateTime> - an element containing the date and time of the
   expiration of this validation event.

   <iris:seeAlso> - an element containing an entity reference specifying
   a referent that is indirectly associated with this validation event.

3.3. Generic Code Derivatives

3.3.1. <searchTooWide>

   Servers MAY use the <searchTooWide> error code when a query must be
   narrowed to yield a result set acceptable to the policies of the
   server operator.

3.3.2. <languageNotSupported>

   The queries <findEnumsByContact> and <findContacts> support optional
   language tags that allow a client to suggest to a server the
   languages in which to scope the queries.  If a client passes to the
   server a language that the server does not support, the server MAY
   use this error code to indicate that one of the languages is not
   supported.

   This element contains child elements named <unsupportedLanguage>.
   Each of these child elements specifies a language not supported by
   the server.  When a server returns this error, it MUST give the
   languages from the query that are not supported.

3.4. Support for <iris:lookupEntity>

   The following types of entity classes are recognized by the
   <lookupEntity> query of IRIS for this registry:

   o  host-name - the fully qualified domain name of a nameserver.  It
      yields a <host> (Section 3.2.4) in the response.

   o  host-handle - the registry-unique identifier given a nameserver.
      It yields a <host> (Section 3.2.4) in the response.

   o  e164 - an E.164 number as specified by [13].  It yields an <enum>
      (Section 3.2.3) in the response.  Clients SHOULD remove all non-
      digit characters between the digits of an E.164 number, and
      servers MUST ignore any non-digit characters between the digits of
      an E.164 number (e.g., "+1 703 555 1234" is to be interpreted as
      "+17035551234").

   o  enum - the fully qualified name of an ENUM domain.  This is a
      domain name as specified by RFC 3761 [17].  It yields an <enum>
      (Section 3.2.3) in the response.

   o  enum-handle - the registry-unique identifier given an ENUM domain.
      It yields an <enum> (Section 3.2.3) in the response.

   o  contact-handle - the registry-unique identifier given a contact.
      It yields a <contact> (Section 3.2.5) in the response.

   o  ipv4-address - the IPv4 address of a nameserver.  It yields a
      <host> (Section 3.2.4) in the response.

   o  ipv6-address - the IPv6 address of a nameserver.  It yields a
      <host> (Section 3.2.4) in the response.

   o  registration-authority - the name of a registration authority.  It
      yields a <registrationAuthority> (Section 3.2.6) in the response.

   o  validation-entity - the name of a validation entity.  It yields a
      <validationEntity> (Section 3.2.7)

   o  csp - the identifier of a communication service provider.  Yields
      a <communicationServiceProvider> (Section 3.2.8).

   o  validation-event - the identifier for a validation event.  It
      yields a <validationEvent> (Section 3.2.9).

   o  All names in these entity classes are case insensitive.

4. Formal XML Syntax

This registry schema is specified in the XML Schema notation.  The
   formal syntax presented here is a complete schema representation
   suitable for automated validation of an XML instance when combined
   with the formal schema syntax of IRIS.

   <?xml version="1.0"?>
   <schema xmlns="http://www.w3.org/2001/XMLSchema"
     xmlns:ereg="urn:ietf:params:xml:ns:ereg1"
     xmlns:iris="urn:ietf:params:xml:ns:iris1"
     targetNamespace="urn:ietf:params:xml:ns:ereg1"
     elementFormDefault="qualified" >

     <import namespace="urn:ietf:params:xml:ns:iris1" />

     <annotation>
       <documentation>
         ENUM registry schema
         derived from IRIS schema
       </documentation>
     </annotation>

     
     
     
     
     

     
     
     

     <complexType
       name="findEnumsByE164Type">
       <complexContent>
         <extension
           base="iris:queryType">
           <sequence>
             <element
               name="e164Prefix"
               type="token" />
             <element
               name="specificity"
               minOccurs="0" >
               <simpleType>
                 <restriction
                   base="string">

<enumeration
                     value="less"/>
                   <enumeration
                     value="more"/>
                 </restriction>
               </simpleType>
             </element>
           </sequence>
         </extension>
       </complexContent>
     </complexType>

     <element
       name="findEnumsByE164"
       type="ereg:findEnumsByE164Type"
       substitutionGroup="iris:query" />

     
     
     

     <complexType
       name="findEnumsByContactType">
       <complexContent>
         <extension
           base="iris:queryType">
           <sequence>
             <choice>
               <group
                 ref="ereg:contactSearchGroup" />
               <element
                 name="contactHandle"
                 type="ereg:exactMatchParameter" />
             </choice>
             <element
               name="role"
               minOccurs="0"
               maxOccurs="1" >
               <simpleType>
                 <restriction
                   base="string" >
                   <enumeration
                     value="registrant" />
                   <enumeration
                     value="billingContact" />
                   <enumeration
                     value="technicalContact" />
                   <enumeration

value="administrativeContact" />
                   <enumeration
                     value="legalContact" />
                   <enumeration
                     value="zoneContact" />
                   <enumeration
                     value="abuseContact" />
                   <enumeration
                     value="securityContact" />
                   <enumeration
                     value="otherContact" />
                 </restriction>
               </simpleType>
             </element>
             <element
               name="language"
               type="language"
               minOccurs="0"
               maxOccurs="unbounded"/>
           </sequence>
         </extension>
       </complexContent>
     </complexType>

     <element
       name="findEnumsByContact"
       type="ereg:findEnumsByContactType"
       substitutionGroup="iris:query" />

     
     
     

     <complexType
       name="findContactsType">
       <complexContent>
         <extension
           base="iris:queryType">
           <sequence>
             <group
               ref="ereg:contactSearchGroup" />
             <element
               name="language"
               type="language"
               minOccurs="0"
               maxOccurs="unbounded"/>
            </sequence>
         </extension>

</complexContent>
     </complexType>

     <element
       name="findContacts"
       type="ereg:findContactsType"
       substitutionGroup="iris:query" />

     
     
     

     <complexType
       name="findEnumsByHostType">
       <complexContent>
         <extension
           base="iris:queryType">
           <sequence>
             <choice>
               <element
                 name="hostName"
                 type="ereg:exactMatchParameter" />
               <element
                 name="hostHandle"
                 type="ereg:exactMatchParameter" />
               <element
                 name="ipV4Address"
                 type="ereg:exactMatchParameter" />
               <element
                 name="ipV6Address"
                 type="ereg:exactMatchParameter" />
             </choice>
           </sequence>
         </extension>
       </complexContent>
     </complexType>

     <element
       name="findEnumsByHost"
       type="ereg:findEnumsByHostType"
       substitutionGroup="iris:query" />

     
     
     

     <group
       name="contactSearchGroup">

             <element
               name="lastContactModificationBy"
               type="iris:entityType"
               minOccurs="0"
               maxOccurs="1" />
             <element
               name="status"
               minOccurs="0"
               maxOccurs="1">
               <complexType>
                 <choice
                   minOccurs="1"
                   maxOccurs="unbounded">
                   <element
                     name="reserved"
                     type="ereg:enumStatusType" />
                   <element
                     name="create"
                     type="ereg:enumStatusType" />
                   <element
                     name="active"
                     type="ereg:enumStatusType" />
                   <element
                     name="inactive"
                     type="ereg:enumStatusType" />
                   <element
                     name="dispute"
                     type="ereg:enumStatusType" />
                   <element
                     name="delete"
                     type="ereg:enumStatusType" />
                   <element
                     name="transfer"
                     type="ereg:enumStatusType" />
                   <element
                     name="renew"
                     type="ereg:enumStatusType" />
                   <element
                     name="update"
                     type="ereg:enumStatusType" />
                   <element
                     name="addPeriod"
                     type="ereg:enumStatusType" />
                   <element
                     name="renewPeriod"
                     type="ereg:enumStatusType" />
                   <element
                     name="autoRenewPeriod"

                     type="ereg:enumStatusType" />
                   <element
                     name="transferPeriod"
                     type="ereg:enumStatusType" />
                   <element
                     name="redemptionPeriod"
                     type="ereg:enumStatusType" />
                   <element
                     name="restore"
                     type="ereg:enumStatusType" />
                   <element
                     name="other"
                     type="ereg:enumStatusType" />
                 </choice>
               </complexType>
             </element>
             <element
               name="registrationReference"
               type="iris:entityType"
               minOccurs="0"
               maxOccurs="1" />
             <element
               name="registry"
               type="iris:entityType"
               minOccurs="0"
               maxOccurs="1" />
             <element
               name="registrar"
               type="iris:entityType"
               minOccurs="0"
               maxOccurs="1" />
             <element
               name="validationEntity"
               type="iris:entityType"
               minOccurs="0"
               maxOccurs="unbounded" />
             <element
               name="signalCSP"
               type="iris:entityType"
               minOccurs="0"
               maxOccurs="unbounded" />
             <element
               name="dataCSP"
               type="iris:entityType"
               minOccurs="0"
               maxOccurs="unbounded" />
             <element
               name="lineCSP"

               type="iris:entityType"
               minOccurs="0"
               maxOccurs="unbounded"/>
             <element
               name="voiceCSP"
               type="iris:entityType"
               minOccurs="0"
               maxOccurs="unbounded" />
             <element
               name="otherCSP"
               type="iris:entityType"
               minOccurs="0"
               maxOccurs="unbounded" />
             <element
               name="validationEvent"
               type="iris:entityType"
               minOccurs="0"
               maxOccurs="unbounded"/>
             <element
               name="initialDelegationDateTime"
               type="ereg:dateTimePrivacyType"
               nillable="true"
               minOccurs="0"
               maxOccurs="1" />
             <element
               name="lastRenewalDateTime"
               type="ereg:dateTimePrivacyType"
               nillable="true"
               minOccurs="0"
               maxOccurs="1" />
             <element
               name="expirationDateTime"
               type="ereg:dateTimePrivacyType"
               nillable="true"
               minOccurs="0"
               maxOccurs="1" />
             <element
               name="lastDelegationModificationDateTime"
               type="ereg:dateTimePrivacyType"
               nillable="true"
               minOccurs="0"
               maxOccurs="1" />
             <element
               name="lastDelegationModificationBy"
               type="iris:entityType"
               minOccurs="0"
               maxOccurs="1" />
             <element

name="lastVerificationDateTime"
               type="ereg:dateTimePrivacyType"
               nillable="true"
               minOccurs="0"
               maxOccurs="1" />
             <element
               ref="iris:seeAlso"
               minOccurs="0"
               maxOccurs="unbounded" />
           </sequence>
         </extension>
       </complexContent>
     </complexType>

     <element
       name="enum"
       type="ereg:enumType"
       substitutionGroup="iris:result" />

     
     
     

     <complexType
       name="hostType">
       <complexContent>
         <extension
           base="iris:resultType">
           <sequence>
             <element
               name="hostHandle"
               type="ereg:normalizedStringPrivacyType"
               nillable="true"
               minOccurs="0"
               maxOccurs="1" />
             <element
               name="hostName"
               type="normalizedString" />
             <element
               name="ipV4Address"
               type="token"
               minOccurs="0"
               maxOccurs="unbounded" />
             <element
               name="ipV6Address"
               type="token"
               minOccurs="0"
               maxOccurs="unbounded" />

<element
               name="hostContact"
               type="iris:entityType"
               minOccurs="0"
               maxOccurs="unbounded" />
             <element
               name="createdDateTime"
               type="ereg:dateTimePrivacyType"
               nillable="true"
               minOccurs="0"
               maxOccurs="1" />
             <element
               name="lastModificationDateTime"
               type="ereg:dateTimePrivacyType"
               nillable="true"
               minOccurs="0"
               maxOccurs="1" />
             <element
               name="lastVerificationDateTime"
               type="ereg:dateTimePrivacyType"
               nillable="true"
               minOccurs="0"
               maxOccurs="1" />
             <element
               ref="iris:seeAlso"
               minOccurs="0"
               maxOccurs="unbounded" />
           </sequence>
         </extension>
       </complexContent>
     </complexType>

     <element
       name="host"
       type="ereg:hostType"
       substitutionGroup="iris:result" />

     
     
     

     <complexType
       name="contactType">
       <complexContent>
         <extension
           base="iris:resultType">
           <sequence>
             <element

               name="contactHandle"
               type="ereg:normalizedStringPrivacyType"
               nillable="true"
               minOccurs="0"
               maxOccurs="1" />
             <element
               name="commonName"
               type="ereg:normalizedStringPrivacyType"
               nillable="true"
               minOccurs="0"
               maxOccurs="1"/>
             <element
               name="language"
               type="language"
               minOccurs="0"
               maxOccurs="1" />
             <element
               name="type"
               minOccurs="0"
               maxOccurs="1">
               <complexType>
                 <choice>
                   <element
                     name="person"
                     type="ereg:contactTypeType" />
                   <element
                     name="organization"
                     type="ereg:contactTypeType" />
                   <element
                     name="role"
                     type="ereg:contactTypeType" />
                   <element
                     name="other"
                     type="ereg:contactTypeType" />
                 </choice>
               </complexType>
             </element>
             <element
               name="organization"
               type="ereg:normalizedStringPrivacyType"
               nillable="true"
               minOccurs="0"
               maxOccurs="1" />
             <element
               name="legalId"
               type="ereg:tokenPrivacyType"
               nillable="true"
               minOccurs="0"

               maxOccurs="unbounded" />
             <element
               name="eMail"
               type="ereg:stringPrivacyType"
               nillable="true"
               minOccurs="0"
               maxOccurs="unbounded" />
             <element
               name="sip"
               type="ereg:stringPrivacyType"
               nillable="true"
               minOccurs="0"
               maxOccurs="unbounded" />
             <element
               name="postalAddress"
               minOccurs="0"
               maxOccurs="unbounded" >
               <complexType>
                 <sequence>
                   <element
                     name="address"
                     type="ereg:stringPrivacyType"
                     nillable="true"
                     minOccurs="0"
                     maxOccurs="1" />
                   <element
                     name="city"
                     type="ereg:stringPrivacyType"
                     nillable="true"
                     minOccurs="0"
                     maxOccurs="1" />
                   <element
                     name="region"
                     type="ereg:stringPrivacyType"
                     nillable="true"
                     minOccurs="0"
                     maxOccurs="1" />
                   <element
                     name="postalCode"
                     type="ereg:normalizedStringPrivacyType"
                     nillable="true"
                     minOccurs="0"
                     maxOccurs="1" />
                   <element
                     name="country"
                     type="ereg:tokenPrivacyType"
                     nillable="true"
                     minOccurs="0"

                     maxOccurs="1" />
                 </sequence>
               </complexType>
             </element>
             <element
               name="phone"
               type="ereg:normalizedStringPrivacyType"
               nillable="true"
               minOccurs="0"
               maxOccurs="unbounded" />
             <element
               name="fax"
               type="ereg:normalizedStringPrivacyType"
               nillable="true"
               minOccurs="0"
               maxOccurs="unbounded" />
             <element
               name="createdDateTime"
               type="ereg:dateTimePrivacyType"
               nillable="true"
               minOccurs="0"
               maxOccurs="1" />
             <element
               name="lastModificationDateTime"
               type="ereg:dateTimePrivacyType"
               nillable="true"
               minOccurs="0"
               maxOccurs="1" />
             <element
               name="lastVerificationDateTime"
               type="ereg:dateTimePrivacyType"
               nillable="true"
               minOccurs="0"
               maxOccurs="1" />
             <element
               name="translatedContact"
               type="iris:entityType"
               minOccurs="0"
               maxOccurs="unbounded" />
             <element
               ref="iris:seeAlso"
               minOccurs="0"
               maxOccurs="unbounded" />
           </sequence>
         </extension>
       </complexContent>
     </complexType>

<element
       name="contact"
       type="ereg:contactType"
       substitutionGroup="iris:result" />

     
     
     

     <complexType
       name="registrationAuthorityType">
       <complexContent>
         <extension
           base="iris:resultType">
           <sequence>
             <element
               name="serviceInstance"
               type="iris:entityType"
               minOccurs="0"
               maxOccurs="1" />
             <element
               name="organizationName"
               type="string"
               minOccurs="0"
               maxOccurs="1" />
             <element
               name="legalId"
               type="token"
               minOccurs="0"
               maxOccurs="1"/>
             <choice
               minOccurs="0"
               maxOccurs="3">
               <element
                 name="registry">
                 <complexType/>
               </element>
               <element
                 name="registrar">
                 <complexType/>
               </element>
               <element
                 name="other">
                 <complexType/>
               </element>
             </choice>
             <group ref="ereg:contactGroup" />
             <element

ref="iris:seeAlso"
               minOccurs="0"
               maxOccurs="unbounded" />
           </sequence>
         </extension>
       </complexContent>
     </complexType>

     <element
       name="registrationAuthority"
       type="ereg:registrationAuthorityType"
       substitutionGroup="iris:result" />

     
     
     

     <complexType
       name="validationEntityType">
       <complexContent>
         <extension
           base="iris:resultType">
           <sequence>
             <element
               name="serviceInstance"
               type="iris:entityType"
               minOccurs="0"
               maxOccurs="1" />
             <element
               name="organizationName"
               type="string"
               minOccurs="0"
               maxOccurs="1" />
             <element
               name="legalId"
               type="token"
               minOccurs="0"
               maxOccurs="1"/>
             <group ref="ereg:contactGroup" />
             <element
               ref="iris:seeAlso"
               minOccurs="0"
               maxOccurs="unbounded" />
           </sequence>
         </extension>
       </complexContent>
     </complexType>

<complexType/>
               </element>
               <element
                 minOccurs="0"
                 maxOccurs="1"
                 name="voice">
                 <complexType/>
               </element>
               <element
                 minOccurs="0"
                 maxOccurs="1"
                 name="signal">
                 <complexType/>
               </element>
               <element
                 minOccurs="0"
                 maxOccurs="1"
                 name="other">
                 <complexType/>
               </element>
             </choice>
             <group ref="ereg:contactGroup" />
             <element
               ref="iris:seeAlso"
               minOccurs="0"
               maxOccurs="unbounded" />
           </sequence>
         </extension>
       </complexContent>
     </complexType>

     <element
       name="communicationServiceProvider"
       type="ereg:communicationServiceProviderType"
       substitutionGroup="iris:result" />

     
     
     

     <complexType
       name="validationEventType">
       <complexContent>
         <extension
           base="iris:resultType">
           <sequence>
             <element
               name="serial"

type="token"
               minOccurs="0"
               maxOccurs="unbounded" />
             <element
               name="methodId"
               type="token"
               minOccurs="0"
               maxOccurs="unbounded" />
             <element
               name="validationEntity"
               type="iris:entityType"
               minOccurs="0"
               maxOccurs="unbounded" />
             <element
               name="registrar"
               type="iris:entityType"
               minOccurs="0"
               maxOccurs="unbounded" />
             <element
               name="executionDateTime"
               type="ereg:dateTimePrivacyType"
               nillable="true"
               minOccurs="0"
               maxOccurs="1" />
             <element
               name="expirationDateTime"
               type="ereg:dateTimePrivacyType"
               nillable="true"
               minOccurs="0"
               maxOccurs="1" />
             <element
               ref="iris:seeAlso"
               minOccurs="0"
               maxOccurs="unbounded" />
           </sequence>
         </extension>
       </complexContent>
     </complexType>

     <element
       name="validationEvent"
       type="ereg:validationEventType"
       substitutionGroup="iris:result" />

             </simpleContent>
           </complexType>
         </element>
       </sequence>
       <attributeGroup
         ref="ereg:privacyLabelAttributeGroup" />
       <attribute
         name="actor">
         <simpleType>
           <restriction
             base="string">
             <enumeration
               value="registry"/>
             <enumeration
               value="registrar"/>
           </restriction>
         </simpleType>
       </attribute>
       <attribute
         name="disposition">
         <simpleType>
           <restriction
             base="string">
             <enumeration
               value="prohibited"/>
             <enumeration
               value="pending"/>
           </restriction>
         </simpleType>
       </attribute>
       <attribute
         name="scope"
         type="token" />
     </complexType>

     <complexType
       name="contactTypeType">
       <sequence>
         <element
           name="description"
           minOccurs="0"
           maxOccurs="unbounded">
           <complexType>
             <simpleContent>
               <extension
                 base="string">
                 <attribute
                   name="language"

type="language"
                   use="required" />
               </extension>
             </simpleContent>
           </complexType>
         </element>
       </sequence>
       <attributeGroup
         ref="ereg:privacyLabelAttributeGroup" />
     </complexType>

     
     
     
     
     

     
     
     

     <element
       name="searchTooWide"
       type="iris:codeType"
       substitutionGroup="iris:genericCode" />

     
     
     

     <complexType
       name="languageNotSupportedType">
       <complexContent>
         <extension
           base="iris:codeType">
           <sequence>
             <element
               name="unsupportedLanguage"
               type="language"
               minOccurs="1"
               maxOccurs="unbounded" />
           </sequence>
         </extension>
       </complexContent>
     </complexType>

     <element
       name="languageNotSupported"

       type="ereg:languageNotSupportedType"
       substitutionGroup="iris:genericCode" />

   </schema>

                            Figure 1: ereg.xsd

5. Blocks Extensible Exchange Protocol (BEEP) Transport Compliance

IRIS allows several extensions of the core capabilities. This
section outlines those extensions allowable by IRIS-BEEP [6].

5.1. Message Pattern

This registry type uses the default message pattern as described in
IRIS-BEEP [6].

5.2. Server Authentication

This registry type only uses the basic Transport Layer Security (TLS)
server authentication method as described in IRIS-BEEP [6].

6. URI Resolution

6.1. Application Service Label

   The application service label associated with this registry type MUST
   be "EREG1".  This is the abbreviated form of the URN for this
   registry type, urn:ietf:params:xml:ns:ereg1.

7. Internationalization Considerations

   Implementers should be aware of considerations for
   internationalization in IRIS [5].

   The social data associated with contacts may be non-ASCII, and could
   contain virtually any Unicode character.  The <language> element is
   provided in queries that have potential to traverse such data.
   Clients should use these elements to indicate to the server of the
   target languages desired, and servers should use these elements to
   better enable normalization and search processes (see
   <http://www.unicode.org/reports/tr15/>).

   Clients needing to localize the data tags in this protocol should
   take note that localization is only needed on the names of XML
   elements and attributes with the exception of elements containing
   date and time information.  The schema for this registry has been
   designed so that clients need not interpret the content of elements

   or attributes for localization, other than those elements containing
   date and time information.

   Clients should also make use of the <language> elements provided in
   many of the results.  Results containing data that may be in Unicode
   are accompanied by these elements in order to aid better presentation
   of the data to the user.

   The "dateTimePrivacyType" element content conforms to the XML Schema
   [3] data type "dateTime".  The contents of this element MUST be
   specified using the 'Z' indicator for Coordinated Universal Time
   (UTC).

8. IANA Considerations

8.1. XML Namespace URN Registration

   This document makes use of a proposed XML namespace and schema
   registry specified in XML_URN [16].  Accordingly, the following
   registration information is provided for the IANA:

   o  URN/URI:

      *  urn:ietf:params:xml:schema:ereg1

   o  Contact:

      *  Andrew Newton <andy@hxr.us>

   o  XML:

      *  The XML Schema specified in Section 4

   o  URN/URI:

      *  urn:ietf:params:xml:ns:ereg1

   o  Contact:

      *  Andrew Newton <andy@hxr.us>

   o  XML:

      *  None.

8.2. S-NAPTR Registration

   The following S-NAPTR application service tag [20] has been
   registered with IANA according to the IANA considerations defined in
   IRIS [5]:

      EREG1

8.3. BEEP Registration

   The following BEEP Profile URI has been registered with IANA
   (http://www.iana.org/assignments/beep-parameters), in addition to the
   registration provided in IRIS-BEEP [6].

      http://iana.org/beep/iris1/ereg1

9. Security Considerations

This document lays out no new considerations for security precautions
beyond that specified in IRIS [5].

10. Normative References

   [1]   World Wide Web Consortium, "Extensible Markup Language (XML)
         1.0", W3C XML, February 1998,
         <http://www.w3.org/TR/1998/REC-xml-19980210>.

   [2]   World Wide Web Consortium, "Namespaces in XML", W3C XML
         Namespaces, January 1999,
         <http://www.w3.org/TR/1999/REC-xml-names-19990114>.

   [3]   World Wide Web Consortium, "XML Schema Part 2: Datatypes", W3C
         XML Schema, October 2004, <http://www.w3.org/TR/xmlschema-2/>.

   [4]   World Wide Web Consortium, "XML Schema Part 1: Structures", W3C
         XML Schema, October 2004, <http://www.w3.org/TR/xmlschema-1/>.

   [5]   Newton, A. and M. Sanz, "IRIS: The Internet Registry
         Information Service (IRIS) Core Protocol", RFC 3981, January
         2005.

   [6]   Newton, A. and M. Sanz, "Using the Internet Registry
         Information Service (IRIS) over the Blocks Extensible Exchange
         Protocol (BEEP)", RFC 3983, January 2005.

   [7]   Hinden, R. and S. Deering, "Internet Protocol Version 6 (IPv6)
         Addressing Architecture", RFC 3513, April 2003.

   [8]   Postel, J., "Internet Protocol", STD 5, RFC 791, September
         1981.

   [9]   Mockapetris, P., "Domain names - implementation and
         specification", STD 13, RFC 1035, November 1987.

   [10]  Bradner, S., "Key words for use in RFCs to Indicate Requirement
         Levels", RFC 2119, BCP 14, March 1997.

   [11]  International Organization for Standardization, "Codes for the
         representation of names of countries, 3rd edition", ISO
         Standard 3166, August 1988.

   [12]  Braden, R., "Requirements for Internet Hosts - Application and
         Support", STD 3, RFC 1123, October 1989.

   [13]  International Telecommunications Union, "The International
         Public Telecommunication Numbering Plan", ITU-T Recommendation
         E.164, February 2005.

   [14]  International Telecommunications Union, "Notation for national
         and international telephone numbers, e-mail addresses and Web
         addresses", ITU-T Recommendation E.123, February 2001.

   [15]  Hoffman, P. and M. Blanchet, "Nameprep: A Stringprep Profile
         for Internationalized Domain Names (IDN)", RFC 3491, March
         2003.

   [16]  Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
         January 2004.

   [17]  Faltstrom, P. and M. Mealling, "The E.164 to Uniform Resource
         Identifiers (URI)  Dynamic Delegation Discovery System (DDDS)
         Application  (ENUM)", RFC 3761, April 2004.

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

   [19]  Braden, R., "Requirements for Internet Hosts - Application and
         Support", STD 3, RFC 1123, October 1989.

   [20]  Daigle, L. and A. Newton, "Domain-Based Application Service
         Location Using SRV RRs and the Dynamic Delegation Discovery
         Service (DDDS)", RFC 3958, January 2005.

Appendix A. Contributions and Acknowledgements

   This document is a derivative of the specification used to define
   forward domain registries for IRIS.  Marcos Sanz was a major
   contributor to that specification, and many of his words and ideas
   are present in this document.  Other contributors include Alexander
   Mayrhofer, Bernie Hoeneisen, Otmar Lendl, and Scott Hollenbeck.

Author's Address

   Andrew L. Newton
   VeriSign, Inc.
   21345 Ridgetop Circle
   Sterling, VA  20166
   USA

   Phone: +1.7039483382
   EMail: andy@hxr.us
   URI:   http://www.verisignlabs.com/

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