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.
























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Table of Contents

   1. Introduction ....................................................3
   2. Document Terminology ............................................3
   3. Schema Description ..............................................3
      3.1. Query Derivatives ..........................................3
           3.1.1.  Query .............................3
           3.1.2.  Query ..........................4
           3.1.3.  Query ................................4
           3.1.4.  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.  Result .......................................8
           3.2.4.  Result ......................................12
           3.2.5.  Result ...................................13
           3.2.6.  Result .....................15
           3.2.7.  Result ..........................16
           3.2.8.  Result ..............17
           3.2.9.  Result ...........................18
      3.3. Generic Code Derivatives ..................................19
           3.3.1.  ....................................19
           3.3.2.  .............................19
      3.4. Support for  ...........................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











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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.   Query

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

   The E.164 prefix is specified using the  child of
   .  An optional child element of ,



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   , can narrow the search to ENUM domains associated with
   E.164 numbers that are either more specific or less specific.  If the
    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  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.   Query

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

   The allowable search fields are handled with either the
    element or one of the elements in the
   "contactSearchGroup" (see Section 3.1.5).  The 
   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 
   element.  The contents of this element signify the role the contact
   has with the ENUM domain.

   This query also provides optional  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.   Query

    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  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.   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.




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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.

    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  element, or it may constrain
   the query by a subset of the common name using the  and
    elements.

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

    constrains the query based on the e-mail address of the
   contact.  This may be done by an exact e-mail address using the
    element or by any e-mail address in a domain using the
    element.  The  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
    element or domain part of the contents of the 
   element contain a name with non-ASCII characters, they MUST be
   normalized according to the processes of RFC 3491 [15].

   The , , and  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  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".



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   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:

      *   - indicates the date and time the status was
         applied.

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

      *   - 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  child
      elements.  Each  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.



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   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  

   o  

   o  

   o  

   o  

   o  

   o  

   o  

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







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3.2.3.   Result

   An example of a  result:

     

       +1 703 555 1234

       
       

       
         
           Bill Eckels
         
       

       
         
           Mark Kosters
         
       

       
         
         
         
           
             AUTO-LOCK
           
         



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             AUTO-LOCK
           
         
         
           
             AUTO-LOCK
           
         
         
           
             STANDARD RGP
           
         
       

     

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

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

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

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

   o  ENUM domain contacts - see Section 3.2.2.




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

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

      *   - assigned to a registrant

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

      *   - unavailable via DNS

      *   - registrant assignment is in dispute

      *   - registrant assignment removed

      *   - change of authority

      *   - modification of this ENUM domain

      *   - renewal of ENUM domain registration

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

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

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

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

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

      *   - change to previous status of this ENUM domain

      *   - a status only defined by its  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,  is just an



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      indication that the ENUM domain is given special reserved
      status; the  status value must
      also be present to indicate that the ENUM domain cannot be
      registered.

   o   - an element containing an entity
      reference, the referent of which MUST be an 
      (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   - contains an entity reference specifying the ENUM
      domain registry operator for this ENUM domain that MUST be a
       (Section 3.2.6).

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

   o   - contains an entity reference specifying the
      validation entity for this ENUM domain that MUST be a
       (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 
      (Section 3.2.8).

      *  

      *  

      *  

      *  

      *  

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

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

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



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

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

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

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

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

   o   - an element containing an entity reference
      specifying a referent that is indirectly associated with this
      domain.

3.2.4.   Result

   An example of a  result:

   
     nsol184
     a.iana-servers.net
     192.0.2.43
     
   

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

   o   - a registry-unique assigned identifier for the host.



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

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

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

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

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

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

   o   - an element containing an entity reference
      specifying a referent that is indirectly associated with this
      host.

3.2.5.   Result

   An example of a  result:

   
     example-admin
     Example.Org Manager
     Internet Assigned Numbers Authority
     res-dom@example.org
     
       
123 Mocking Bird Lane
Some City CA 00000 US
+1234567890
Newton Standards Track [Page 13] RFC 4414 ENUM Registry Type for IRIS February 2006 The element represents an instance of a contact registration. The children of the element are as follows: o - a registry-unique assigned identifier for this contact. o - the name of the contact. o - a specification of the language code to use to localize the data in this result. o - contains one of the following child elements: , , , or . Each of these elements is a "contactTypeType" as defined in Section 3.2.1. o - an element containing the organization name of the contact. o The 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 - elements containing an e-mail address for this contact. o - elements containing a SIP URI for this contact. o - elements containing children representing a postal address. has the following children: *
- an element containing the street address for this contact. * - an element containing the city for this contact. * - an element containing the national region for this contact. * - an element containing the postal code for this contact. * - an element containing the country for this contact. This SHOULD be a 2-letter country code compliant with ISO 3166 [11]. o - 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. Newton Standards Track [Page 14] RFC 4414 ENUM Registry Type for IRIS February 2006 o - 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 - an element containing the date and time this contact was created. o - an element containing the date and time this contact was last modified. o - an element containing the date and time this data for this contact was last verified to be correct by the appropriate registration authority. o - an element containing an entity reference specifying equivalents of this contact that have been translated into other languages. The referent MUST be (Section 3.2.5) results. o - an element containing an entity reference specifying a referent that is indirectly associated with this contact. 3.2.6. Result An example of a result: Internet Assigned Numbers Authority The result represents an entity capable of registering domains. The child element of contains an entity reference pointing to the entity "id" in the entity class "iris". Newton Standards Track [Page 15] RFC 4414 ENUM Registry Type for IRIS February 2006 The child element contains the name of the registration authority. The 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, , , and , 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 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., or ). contacts - see Section 3.2.2. - an element containing an entity reference specifying a referent that is indirectly associated with this registration authority. 3.2.7. Result An example of a result: Some Government Authority Newton Standards Track [Page 16] RFC 4414 ENUM Registry Type for IRIS February 2006 The result represents an entity responsible for validating ENUM domains against E.164 [13] registrations. The child element of contains an entity reference pointing to the entity "id" in the entity class "iris". The child element contains the name of the validation authority. The 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. - an element containing an entity reference specifying a referent that is indirectly associated with this validation authority. 3.2.8. Result An example of a result: Big Phone Co. The result represents an entity providing ENUM domain service. The child element of contains an entity reference pointing to the entity "id" in the entity class "iris". The child element contains the name of the registration authority. Newton Standards Track [Page 17] RFC 4414 ENUM Registry Type for IRIS February 2006 The 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 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, , , , , and , 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 result using the , , , , and entity references. contacts - see Section 3.2.2. - an element containing an entity reference specifying a referent that is indirectly associated with this communication service provider. 3.2.9. Result An example of a result: xyz-0123 The result represents a record of validation for an ENUM domain. The child element contains an identifier identifying this validation event between a validation entity and a registrar. The child element contains an identifier describing the method used for validation. - contains an entity reference specifying the ENUM domain registrar operator for this validation event that MUST be a (Section 3.2.6). Newton Standards Track [Page 18] RFC 4414 ENUM Registry Type for IRIS February 2006 - contains an entity reference specifying the validation entity for this validation event that MUST be a (Section 3.2.7). - an element containing the date and time of the creation of this validation event. - an element containing the date and time of the expiration of this validation event. - 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. Servers MAY use the error code when a query must be narrowed to yield a result set acceptable to the policies of the server operator. 3.3.2. The queries and 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 . 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 The following types of entity classes are recognized by the query of IRIS for this registry: o host-name - the fully qualified domain name of a nameserver. It yields a (Section 3.2.4) in the response. o host-handle - the registry-unique identifier given a nameserver. It yields a (Section 3.2.4) in the response. Newton Standards Track [Page 19] RFC 4414 ENUM Registry Type for IRIS February 2006 o e164 - an E.164 number as specified by [13]. It yields an (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 (Section 3.2.3) in the response. o enum-handle - the registry-unique identifier given an ENUM domain. It yields an (Section 3.2.3) in the response. o contact-handle - the registry-unique identifier given a contact. It yields a (Section 3.2.5) in the response. o ipv4-address - the IPv4 address of a nameserver. It yields a (Section 3.2.4) in the response. o ipv6-address - the IPv6 address of a nameserver. It yields a (Section 3.2.4) in the response. o registration-authority - the name of a registration authority. It yields a (Section 3.2.6) in the response. o validation-entity - the name of a validation entity. It yields a (Section 3.2.7) o csp - the identifier of a communication service provider. Yields a (Section 3.2.8). o validation-event - the identifier for a validation event. It yields a (Section 3.2.9). o All names in these entity classes are case insensitive. Newton Standards Track [Page 20] RFC 4414 ENUM Registry Type for IRIS February 2006 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. ENUM registry schema derived from IRIS schema Newton Standards Track [Page 21] RFC 4414 ENUM Registry Type for IRIS February 2006 Newton Standards Track [Page 23] RFC 4414 ENUM Registry Type for IRIS February 2006 Newton Standards Track [Page 24] RFC 4414 ENUM Registry Type for IRIS February 2006 Newton Standards Track [Page 25] RFC 4414 ENUM Registry Type for IRIS February 2006 Newton Standards Track [Page 26] RFC 4414 ENUM Registry Type for IRIS February 2006 Newton Standards Track [Page 27] RFC 4414 ENUM Registry Type for IRIS February 2006 Newton Standards Track [Page 31] RFC 4414 ENUM Registry Type for IRIS February 2006 Newton Standards Track [Page 35] RFC 4414 ENUM Registry Type for IRIS February 2006 Newton Standards Track [Page 37] RFC 4414 ENUM Registry Type for IRIS February 2006 Newton Standards Track [Page 38] RFC 4414 ENUM Registry Type for IRIS February 2006 Newton Standards Track [Page 40] RFC 4414 ENUM Registry Type for IRIS February 2006 Newton Standards Track [Page 41] RFC 4414 ENUM Registry Type for IRIS February 2006 Newton Standards Track [Page 42] RFC 4414 ENUM Registry Type for IRIS February 2006 Newton Standards Track [Page 43] RFC 4414 ENUM Registry Type for IRIS February 2006 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 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 ). 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 Newton Standards Track [Page 46] RFC 4414 ENUM Registry Type for IRIS February 2006 or attributes for localization, other than those elements containing date and time information. Clients should also make use of the 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 o XML: * The XML Schema specified in Section 4 o URN/URI: * urn:ietf:params:xml:ns:ereg1 o Contact: * Andrew Newton o XML: * None. Newton Standards Track [Page 47] RFC 4414 ENUM Registry Type for IRIS February 2006 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, . [2] World Wide Web Consortium, "Namespaces in XML", W3C XML Namespaces, January 1999, . [3] World Wide Web Consortium, "XML Schema Part 2: Datatypes", W3C XML Schema, October 2004, . [4] World Wide Web Consortium, "XML Schema Part 1: Structures", W3C XML Schema, October 2004, . [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. Newton Standards Track [Page 48] RFC 4414 ENUM Registry Type for IRIS February 2006 [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. Newton Standards Track [Page 49] RFC 4414 ENUM Registry Type for IRIS February 2006 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/ Newton Standards Track [Page 50] RFC 4414 ENUM Registry Type for IRIS February 2006 Full Copyright Statement Copyright (C) The Internet Society (2006). 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