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Internet Engineering Task Force (IETF)                      B. HoeneisenRequest for Comments: 6118                                       Ucom.chUpdates:3762,3764,3953,4143,4002,                      A. Mayrhofer4238,4355,4415,4769,4969,                           enum.at         4979, 5028, 5278, 5333                               March 2011Category: Standards TrackISSN: 2070-1721Update of Legacy IANA Registrations of EnumservicesAbstract   This document revises all Enumservices that were IANA registered   under the now obsolete specification of the Enumservice registry   defined inRFC 3761.Status of This Memo   This is an Internet Standards Track document.   This document is a product of the Internet Engineering Task Force   (IETF).  It represents the consensus of the IETF community.  It has   received public review and has been approved for publication by the   Internet Engineering Steering Group (IESG).  Further information on   Internet Standards is available inSection 2 of RFC 5741.   Information about the current status of this document, any errata,   and how to provide feedback on it may be obtained athttp://www.rfc-editor.org/info/rfc6118.Copyright Notice   Copyright (c) 2011 IETF Trust and the persons identified as the   document authors.  All rights reserved.   This document is subject toBCP 78 and the IETF Trust's Legal   Provisions Relating to IETF Documents   (http://trustee.ietf.org/license-info) in effect on the date of   publication of this document.  Please review these documents   carefully, as they describe your rights and restrictions with respect   to this document.  Code Components extracted from this document must   include Simplified BSD License text as described in Section 4.e of   the Trust Legal Provisions and are provided without warranty as   described in the Simplified BSD License.Hoeneisen & Mayrhofer        Standards Track                    [Page 1]

RFC 6118         Update Legacy Enumservice Registrations      March 2011   This document may contain material from IETF Documents or IETF   Contributions published or made publicly available before November   10, 2008.  The person(s) controlling the copyright in some of this   material may not have granted the IETF Trust the right to allow   modifications of such material outside the IETF Standards Process.   Without obtaining an adequate license from the person(s) controlling   the copyright in such materials, this document may not be modified   outside the IETF Standards Process, and derivative works of it may   not be created outside the IETF Standards Process, except to format   it for publication as an RFC or to translate it into languages other   than English.Table of Contents1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .42.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .43.  IESG Action  . . . . . . . . . . . . . . . . . . . . . . . . .54.  Legacy Enumservice Registrations Converted to XML Chunks . . .54.1.  email:mailto . . . . . . . . . . . . . . . . . . . . . . .64.2.  ems:mailto . . . . . . . . . . . . . . . . . . . . . . . .74.3.  ems:tel  . . . . . . . . . . . . . . . . . . . . . . . . .84.4.  fax:tel  . . . . . . . . . . . . . . . . . . . . . . . . .94.5.  ft:ftp . . . . . . . . . . . . . . . . . . . . . . . . . .104.6.  h323 . . . . . . . . . . . . . . . . . . . . . . . . . . .114.7.  ical-access:http . . . . . . . . . . . . . . . . . . . . .124.8.  ical-access:https  . . . . . . . . . . . . . . . . . . . .134.9.  ical-sched:mailto  . . . . . . . . . . . . . . . . . . . .144.10. ifax:mailto  . . . . . . . . . . . . . . . . . . . . . . .154.11. im . . . . . . . . . . . . . . . . . . . . . . . . . . . .164.12. mms:mailto . . . . . . . . . . . . . . . . . . . . . . . .174.13. mms:tel  . . . . . . . . . . . . . . . . . . . . . . . . .194.14. pres . . . . . . . . . . . . . . . . . . . . . . . . . . .204.15. pstn:sip . . . . . . . . . . . . . . . . . . . . . . . . .214.16. pstn:tel . . . . . . . . . . . . . . . . . . . . . . . . .224.17. sip  . . . . . . . . . . . . . . . . . . . . . . . . . . .234.18. sms:mailto . . . . . . . . . . . . . . . . . . . . . . . .244.19. sms:tel  . . . . . . . . . . . . . . . . . . . . . . . . .254.20. unifmsg:http . . . . . . . . . . . . . . . . . . . . . . .264.21. unifmsg:https  . . . . . . . . . . . . . . . . . . . . . .274.22. unifmsg:sip  . . . . . . . . . . . . . . . . . . . . . . .284.23. unifmsg:sips . . . . . . . . . . . . . . . . . . . . . . .294.24. vcard  . . . . . . . . . . . . . . . . . . . . . . . . . .304.25. videomsg:http  . . . . . . . . . . . . . . . . . . . . . .314.26. videomsg:https . . . . . . . . . . . . . . . . . . . . . .324.27. videomsg:sip . . . . . . . . . . . . . . . . . . . . . . .334.28. videomsg:sips  . . . . . . . . . . . . . . . . . . . . . .344.29. voice:tel  . . . . . . . . . . . . . . . . . . . . . . . .354.30. voicemsg:http  . . . . . . . . . . . . . . . . . . . . . .37Hoeneisen & Mayrhofer        Standards Track                    [Page 2]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.31. voicemsg:https . . . . . . . . . . . . . . . . . . . . . .384.32. voicemsg:sip . . . . . . . . . . . . . . . . . . . . . . .394.33. voicemsg:sips  . . . . . . . . . . . . . . . . . . . . . .404.34. voicemsg:tel . . . . . . . . . . . . . . . . . . . . . . .414.35. vpim:ldap  . . . . . . . . . . . . . . . . . . . . . . . .424.36. vpim:mailto  . . . . . . . . . . . . . . . . . . . . . . .434.37. web:http . . . . . . . . . . . . . . . . . . . . . . . . .454.38. web:https  . . . . . . . . . . . . . . . . . . . . . . . .464.39. xmpp . . . . . . . . . . . . . . . . . . . . . . . . . . .475.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . .476.  Security Considerations  . . . . . . . . . . . . . . . . . . .477.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . .478.  References . . . . . . . . . . . . . . . . . . . . . . . . . .488.1.  Normative References . . . . . . . . . . . . . . . . . . .488.2.  Informative References . . . . . . . . . . . . . . . . . .49Appendix A.  Former Content of the IANA Repository . . . . . . . .49Hoeneisen & Mayrhofer        Standards Track                    [Page 3]

RFC 6118         Update Legacy Enumservice Registrations      March 20111.  Introduction   [RFC6117] has obsoleted the IANA registration section of [RFC3761].   Since the IANA Enumservice registry contains various Enumservices   registered under the regime ofRFC 3761, those registrations do not   conform to the new guidelines as specified in [RFC6117].  To ensure   consistency among all Enumservice registrations at IANA, this   document adds the (nowadays) missing elements to those legacy   registrations.  Furthermore, all legacy Enumservice registrations are   converted to the new XML-chunk format, and, where deemed necessary,   minor editorial corrections are applied.   However, this document only adds the missing elements to the XML   chunks as specified in the IANA Considerations section of [RFC6117],   but it does not complete the (nowadays) missing sections of the   corresponding Enumservice Specifications.  In order to conform with   the new registration regime as specified in [RFC6117], those   Enumservice Specifications still have to be revised.   It is important to note that this document does not update the   functional specification of the concerned Enumservices.   The following RFCs are updated by this document:   o  [RFC3762]   o  [RFC3764]   o  [RFC3953]   o  [RFC4143]   o  [RFC4002]   o  [RFC4238]   o  [RFC4355]   o  [RFC4415]   o  [RFC4769]   o  [RFC4969]   o  [RFC4979]   o  [RFC5028]   o  [RFC5278]   o  [RFC5333]2.  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 inRFC 2119 [RFC2119].Hoeneisen & Mayrhofer        Standards Track                    [Page 4]

RFC 6118         Update Legacy Enumservice Registrations      March 20113.  IESG Action   According to [RFC3761], any Enumservice registration had to be   published as a Standards Track, Experimental, or BCP (Best Current   Practice) RFC.  [RFC6117] no longer has this requirement, i.e.,   "Specification Required", which implies the use of a Designated   Expert [RFC5226], is sufficient.   This document changes the approval requirement for updates to   Enumservice registrations to Specification Required, whereby the   specification and request are reviewed by a Designated Expert as   described in [RFC6117].4.  Legacy Enumservice Registrations Converted to XML Chunks   In the following, the legacy Enumservice Registrations are converted   to XML chunks that include the new elements introduced by [RFC6117].   (Note that references in Sections4.1 -4.39 refer to the references   section within the respective Enumservice Specification.)4.1.  email:mailto     <record>       <!-- email:mailto -->       <class>Application-Based, Common</class>       <type>email</type>       <subtype>mailto</subtype>       <urischeme>mailto</urischeme>       <functionalspec>         <paragraph>           This Enumservice indicates that the resource can be           addressed by the associated URI in order to send an           email.         </paragraph>       </functionalspec>       <security>         See <xref type="rfc" data="rfc4355"/>,Section 6.       </security>       <usage>COMMON</usage>       <registrationdocs>         <xref type="rfc" data="rfc4355"/> (updated byRFC 6118)         <xref type="rfc" data="RFC 6118"/>       </registrationdocs>       <requesters>         <xref type="person" data="Rudolf_Brandner"/>         <xref type="person" data="Lawrence_Conroy"/>         <xref type="person" data="Richard_Stastny"/>Hoeneisen & Mayrhofer        Standards Track                    [Page 5]

RFC 6118         Update Legacy Enumservice Registrations      March 2011       </requesters>     </record>4.2.  ems:mailto    <record>      <!-- ems:mailto -->      <class>Application-Based, Common</class>      <type>ems</type>      <subtype>mailto</subtype>      <urischeme>mailto</urischeme>      <functionalspec>        <paragraph>          This Enumservice indicates that the resource          identified by the associated URI is capable          of receiving a message using an email protocol.        </paragraph>        <paragraph>          EMS content is sent over SMTP using the format          specified by TS 23.140 [15]Section 8.4.4 and TS          26.140 [16]Section 4, as an MMS message.  Within          such a message, EMS content is carried as either a          text or application/octet-stream MIME sub-part (see          TS 26.140 [16],Section 4.1).        </paragraph>        <paragraph>          References are contained in <xref type="rfc" data="rfc4355"/>.        </paragraph>      </functionalspec>      <security>        <paragraph>          There are no specific security issues with this          Enumservice.  However, the general considerations ofSection 6 of <xref type="rfc" data="rfc4355"/> apply.        </paragraph>      </security>      <usage>COMMON</usage>      <registrationdocs>        <xref type="rfc" data="rfc4355"/> (updated byRFC 6118)        <xref type="rfc" data="RFC 6118"/>      </registrationdocs>      <requesters>        <xref type="person" data="Rudolf_Brandner"/>        <xref type="person" data="Lawrence_Conroy"/>        <xref type="person" data="Richard_Stastny"/>      </requesters>    </record>Hoeneisen & Mayrhofer        Standards Track                    [Page 6]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.3.  ems:tel    <record>      <!-- ems:tel -->      <class>Application-Based, Common</class>      <type>ems</type>      <subtype>tel</subtype>      <urischeme>tel</urischeme>      <functionalspec>        <paragraph>          This Enumservice indicates that the resource          identified by the associated URI is capable          of receiving a message using the Enhanced Message          Service (EMS) [14].        </paragraph>        <paragraph>          References are contained in <xref type="rfc" data="rfc4355"/>.        </paragraph>      </functionalspec>      <security>        <paragraph>          There are no specific security issues with this          Enumservice.  However, the general considerations ofSection 6 of <xref type="rfc" data="rfc4355"/> apply.        </paragraph>      </security>      <usage>COMMON</usage>      <registrationdocs>        <xref type="rfc" data="rfc4355"/> (updated byRFC 6118)        <xref type="rfc" data="RFC 6118"/>      </registrationdocs>      <requesters>        <xref type="person" data="Rudolf_Brandner"/>        <xref type="person" data="Lawrence_Conroy"/>        <xref type="person" data="Richard_Stastny"/>      </requesters>      <additionalinfo>        <paragraph>          Note that an indication of EMS can be taken as          implying that the recipient is capable of receiving          SMS messages at this address as well.        </paragraph>      </additionalinfo>    </record>Hoeneisen & Mayrhofer        Standards Track                    [Page 7]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.4.  fax:tel    <record>      <!-- fax:tel -->      <class>Application-Based, Subset</class>      <type>fax</type>      <subtype>tel</subtype>      <urischeme>tel</urischeme>      <functionalspec>        <paragraph>          This Enumservice indicates that the resource          identified by the associated URI is capable          of being contacted to provide a communication          session during which facsimile documents can be          sent.        </paragraph>        <paragraph>          A client selecting this NAPTR will have support          for generating and sending facsimile documents to          the recipient using the PSTN session and transfer          protocols specified in [12] and [13] in          <xref type="rfc" data="rfc4355"/> -          in short, they will have a fax program with a local          or shared PSTN access over which they can send          faxes.        </paragraph>        <paragraph>          References are contained in <xref type="rfc" data="rfc4355"/>.        </paragraph>      </functionalspec>      <security>        See <xref type="rfc" data="rfc4355"/>,Section 6.      </security>      <usage>COMMON</usage>      <registrationdocs>        <xref type="rfc" data="rfc4355"/> (updated byRFC 6118)        <xref type="rfc" data="RFC 6118"/>      </registrationdocs>      <requesters>        <xref type="person" data="Rudolf_Brandner"/>        <xref type="person" data="Lawrence_Conroy"/>        <xref type="person" data="Richard_Stastny"/>      </requesters>    </record>Hoeneisen & Mayrhofer        Standards Track                    [Page 8]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.5.  ft:ftp     <record>       <!-- ft:ftp -->       <class>Application-Based, Subset</class>       <type>ft</type>       <subtype>ftp</subtype>       <urischeme>ftp</urischeme>       <functionalspec>         <paragraph>           This Enumservice indicates that the resource           identified by the associated URI is a file           service from which a file or file listing can be           retrieved.         </paragraph>       </functionalspec>       <security>         See <xref type="rfc" data="rfc4002"/>,Section 5.       </security>       <usage>COMMON</usage>       <registrationdocs>         <xref type="rfc" data="rfc4002"/> (updated byRFC 6118)         <xref type="rfc" data="RFC 6118"/>       </registrationdocs>       <requesters>         <xref type="person" data="Rudolf_Brandner"/>         <xref type="person" data="Lawrence_Conroy"/>         <xref type="person" data="Richard_Stastny"/>       </requesters>     </record>Hoeneisen & Mayrhofer        Standards Track                    [Page 9]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.6.  h323     <record>       <!-- h323 -->       <class>Protocol-Based</class>       <type>h323</type>       <!-- No subtype -->       <urischeme>h323</urischeme>       <functionalspec>         See <xref type="rfc" data="rfc3762"/>,Section 3.       </functionalspec>       <security>         See <xref type="rfc" data="rfc3762"/>,Section 5.       </security>       <usage>COMMON</usage>       <registrationdocs>         <xref type="rfc" data="rfc3762"/> (updated byRFC 6118)         <xref type="rfc" data="RFC 6118"/>       </registrationdocs>       <requesters>         <xref type="person" data="Orit_Levin"/>       </requesters>     </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 10]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.7.  ical-access:http    <record>      <!-- ical-access:http -->      <class>Application-Based, Common</class>      <type>ical-access</type>      <subtype>http</subtype>      <urischeme>http</urischeme>      <functionalspec>        <paragraph>          This Enumservice indicates that the resource identified          can be addressed by the associated URI in order to access          a user's calendar (for example free/busy status) using          the CalDAV [7] protocol for Internet calendaring.        </paragraph>        <paragraph>          References are contained in <xref type="rfc" data="rfc5333"/>.        </paragraph>      </functionalspec>      <security>        See <xref type="rfc" data="rfc5333"/>,Section 4.      </security>      <usage>COMMON</usage>      <registrationdocs>        <xref type="rfc" data="rfc5333"/> (updated byRFC 6118)        <xref type="rfc" data="RFC 6118"/>      </registrationdocs>      <requesters>        <xref type="person" data="Rohan_Mahy"/>      </requesters>    </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 11]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.8.  ical-access:https    <record>      <!-- ical-access:https -->      <class>Application-Based, Common</class>      <type>ical-access</type>      <subtype>https</subtype>      <urischeme>https</urischeme>      <functionalspec>        <paragraph>          This Enumservice indicates that the resource identified          can be addressed by the associated URI in order to access          a user's calendar (for example free/busy status) using          the CalDAV [7] protocol for Internet calendaring.        </paragraph>        <paragraph>          References are contained in <xref type="rfc" data="rfc5333"/>.        </paragraph>      </functionalspec>      <security>        See <xref type="rfc" data="rfc5333"/>,Section 4.      </security>      <usage>COMMON</usage>      <registrationdocs>        <xref type="rfc" data="rfc5333"/> (updated byRFC 6118)        <xref type="rfc" data="RFC 6118"/>      </registrationdocs>      <requesters>        <xref type="person" data="Rohan_Mahy"/>      </requesters>    </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 12]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.9.  ical-sched:mailto    <record>      <!-- ical-sched:mailto -->      <class>Application-Based, Common</class>      <type>ical-sched</type>      <subtype>mailto</subtype>      <urischeme>mailto</urischeme>      <functionalspec>        <paragraph>          This Enumservice indicates that the resource identified          can be addressed by the associated URI used for          scheduling using Internet calendaring via Internet mail          with the iMIP [6] protocol.        </paragraph>        <paragraph>          References are contained in <xref type="rfc" data="rfc5333"/>.        </paragraph>      </functionalspec>      <security>        See <xref type="rfc" data="rfc5333"/>,Section 4.      </security>      <usage>COMMON</usage>      <registrationdocs>        <xref type="rfc" data="rfc5333"/> (updated byRFC 6118)        <xref type="rfc" data="RFC 6118"/>      </registrationdocs>      <requesters>        <xref type="person" data="Rohan_Mahy"/>      </requesters>    </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 13]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.10.  ifax:mailto     <record>       <!-- ifax:mailto -->       <class>Application-Based, Subset</class>       <type>ifax</type>       <subtype>mailto</subtype>       <urischeme>mailto</urischeme>       <functionalspec>         See <xref type="rfc" data="rfc4143"/>,Section 1.       </functionalspec>       <security>         See <xref type="rfc" data="rfc4143"/>,Section 3.       </security>       <usage>COMMON</usage>       <registrationdocs>         <xref type="rfc" data="rfc4143"/> (updated byRFC 6118)         <xref type="rfc" data="RFC 6118"/>       </registrationdocs>       <requesters>         <xref type="person" data="Kiyoshi_Toyoda"/>         <xref type="person" data="Dave_Crocker"/>       </requesters>       <additionalinfo>         <paragraph>           The URI Scheme is 'mailto' because facsimile is a           profile of standard Internet mail and uses standard           Internet mail addressing.         </paragraph>       </additionalinfo>     </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 14]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.11.  im    <record>      <!-- im -->      <class>Application-Based, Common</class>      <type>im</type>      <!-- No subtype -->      <urischeme>im</urischeme>      <functionalspec>        <paragraph>          This Enumservice indicates that the resource          identified is an 'im:' URI.  The 'im:' URI scheme          does not identify any particular protocol that will          be used to handle instant messaging receipt or          delivery, rather the mechanism inRFC 3861 [4] is          used to discover whether an IM protocol supported by          the party querying ENUM is also supported by the          target resource.        </paragraph>        <paragraph>          References are contained in <xref type="rfc" data="rfc5028"/>.        </paragraph>      </functionalspec>      <security>        See <xref type="rfc" data="rfc5028"/>,Section 3.      </security>      <usage>COMMON</usage>      <registrationdocs>        <xref type="rfc" data="rfc5028"/> (updated byRFC 6118)        <xref type="rfc" data="RFC 6118"/>      </registrationdocs>      <requesters>        <xref type="person" data="Rohan_Mahy"/>      </requesters>    </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 15]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.12.  mms:mailto    <record>      <!-- mms:mailto -->      <class>Application-Based, Common</class>      <type>mms</type>      <subtype>mailto</subtype>      <urischeme>mailto</urischeme>      <functionalspec>        <paragraph>          This Enumservice indicates that the resource          identified by the associated URI is capable          of receiving a message using an email protocol.        </paragraph>        <paragraph>          MMS messages are sent over SMTP using the format          specified by TS 23.140 [15]Section 8.4.4 and TS          26.140 [16]Section 4.        </paragraph>        <paragraph>          Within and between MMS Environments (MMSE,          network infrastructures that support the MultiMedia          Service), other pieces of state data (for example,          charging-significant information) are exchanged          between MMS Relay Servers.  Thus, although these          servers use SMTP as the "bearer" for their          application exchanges, they map their internal state          to specialized header fields carried in the SMTP message          exchanges.  The header fields used in such MMSE are          described in detail in [17].        </paragraph>        <paragraph>          References are contained in <xref type="rfc" data="rfc4355"/>.        </paragraph>      </functionalspec>      <security>        <paragraph>          There are no specific security issues with this          Enumservice.  However, the general considerations ofSection 6 of <xref type="rfc" data="rfc4355"/> apply.        </paragraph>      </security>      <usage>COMMON</usage>      <registrationdocs>        <xref type="rfc" data="rfc4355"/> (updated byRFC 6118)        <xref type="rfc" data="RFC 6118"/>      </registrationdocs>      <requesters>Hoeneisen & Mayrhofer        Standards Track                   [Page 16]

RFC 6118         Update Legacy Enumservice Registrations      March 2011        <xref type="person" data="Rudolf_Brandner"/>        <xref type="person" data="Lawrence_Conroy"/>        <xref type="person" data="Richard_Stastny"/>      </requesters>      <additionalinfo>        <paragraph>          The MMS Architecture describes an interface          between the MMSE and "legacy messaging systems"          (labelled as MM3) that accepts "standard" SMTP          messages.  Thus, although the MMS Relay Server that          supports this interface appears as a standard SMTP          server from the perspective of an Internet-based          mail server, it acts as a gateway and translator,          adding the internal state data that is used within          and between the MMS Environments.  This mechanism is          described in [17], which also includes references to          the specifications agreed by those bodies          responsible for the design of the MMS.        </paragraph>        <paragraph>          References are contained in <xref type="rfc" data="rfc4355"/>.        </paragraph>      </additionalinfo>    </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 17]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.13.  mms:tel    <record>      <!-- mms:tel -->      <class>Application-Based, Common</class>      <type>mms</type>      <subtype>tel</subtype>      <urischeme>tel</urischeme>      <functionalspec>        <paragraph>          This Enumservice indicates that the resource          identified by the associated URI is capable          of receiving a message using the Multimedia          Messaging Service (MMS) [15].        </paragraph>        <paragraph>          References are contained in <xref type="rfc" data="rfc4355"/>.        </paragraph>      </functionalspec>      <security>        <paragraph>          There are no specific security issues with this          Enumservice.  However, the general considerations ofSection 6 of <xref type="rfc" data="rfc4355"/> apply.        </paragraph>      </security>      <usage>COMMON</usage>      <registrationdocs>        <xref type="rfc" data="rfc4355"/> (updated byRFC 6118)        <xref type="rfc" data="RFC 6118"/>      </registrationdocs>      <requesters>        <xref type="person" data="Rudolf_Brandner"/>        <xref type="person" data="Lawrence_Conroy"/>        <xref type="person" data="Richard_Stastny"/>      </requesters>      <additionalinfo>        <paragraph>          Note that MMS can be used as an alternative to          deliver an SMS RP-DATA RPDU if, for example, the          SMS bearer is not supported.  If an entry includes          this Enumservice, then in effect this can be taken          as implying that the recipient is capable of          receiving EMS or SMS messages at this address.  Such          choices on the end system design do have two small          caveats; whilst in practice all terminals supporting          MMS today support SMS as well, it might not          necessarily be the case in the future, and there mayHoeneisen & Mayrhofer        Standards Track                   [Page 18]

RFC 6118         Update Legacy Enumservice Registrations      March 2011          be tariff differences in using the MMS rather than          using the SMS or EMS.        </paragraph>      </additionalinfo>    </record>4.14.  pres     <record>       <!-- pres -->       <class>Application-Based, Common</class>       <type>pres</type>       <!-- No subtype -->       <urischeme>pres</urischeme>       <functionalspec>         See <xref type="rfc" data="rfc3953"/>,Section 4.       </functionalspec>       <security>         See <xref type="rfc" data="rfc3953"/>,Section 6.       </security>       <usage>COMMON</usage>       <registrationdocs>         <xref type="rfc" data="rfc3953"/> (updated byRFC 6118)         <xref type="rfc" data="RFC 6118"/>       </registrationdocs>       <requesters>         <xref type="person" data="Jon_Peterson"/>       </requesters>       <additionalinfo>         <paragraph>           See <xref type="rfc" data="rfc3953"/>,Section 3.         </paragraph>       </additionalinfo>     </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 19]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.15.  pstn:sip     <record>       <!-- pstn:sip -->       <class>Application-Based, Common</class>       <type>pstn</type>       <subtype>sip</subtype>       <urischeme>sip</urischeme>       <functionalspec>         <paragraph>           These Enumservices indicate that the           resource identified can be addressed by the           associated URI in order to initiate a           telecommunication session, which may include two-way           voice or other communications, to the PSTN.         </paragraph>       </functionalspec>       <security>         See <xref type="rfc" data="rfc4769"/>,Section 7.       </security>       <usage>COMMON</usage>       <registrationdocs>         <xref type="rfc" data="rfc4769"/> (updated byRFC 6118)         <xref type="rfc" data="RFC 6118"/>       </registrationdocs>       <requesters>         <xref type="person" data="Jason_Livingood"/>        <xref type="person" data="Richard_Shockey"/>       </requesters>       <additionalinfo>         <paragraph>           A Number Portability Dip Indicator (npdi) should           be used in practice           (see <xref type="rfc" data="rfc4769"/>,Section 4).         </paragraph>       </additionalinfo>     </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 20]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.16.  pstn:tel    <record>      <!-- pstn:tel -->      <class>Application-Based, Ancillary</class>      <type>pstn</type>      <subtype>tel</subtype>      <urischeme>tel</urischeme>      <functionalspec>        <paragraph>          These Enumservices indicate that the          resource identified can be addressed by the          associated URI in order to initiate a          telecommunication session, which may include two-way          voice or other communications, to the PSTN.  These          URIs may contain number portability data as          specified inRFC4694 [10].        </paragraph>        <paragraph>          References are contained in <xref type="rfc" data="rfc4769"/>.        </paragraph>      </functionalspec>      <security>        See <xref type="rfc" data="rfc4769"/>,Section 7.      </security>      <usage>COMMON</usage>      <registrationdocs>        <xref type="rfc" data="rfc4769"/> (updated byRFC 6118)        <xref type="rfc" data="RFC 6118"/>      </registrationdocs>      <requesters>        <xref type="person" data="Jason_Livingood"/>        <xref type="person" data="Richard_Shockey"/>      </requesters>      <additionalinfo>        <paragraph>          A Number Portability Dip Indicator (npdi) should          be used in practice          (see <xref type="rfc" data="rfc4769"/>,Section 4).        </paragraph>      </additionalinfo>    </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 21]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.17.  sip     <record>       <!-- sip -->       <class>Protocol-Based</class>       <type>sip</type>       <!-- No subtype -->       <urischeme>sip</urischeme>       <urischeme>sips</urischeme>       <functionalspec>         See <xref type="rfc" data="rfc3764"/>,Section 4.       </functionalspec>       <security>         See <xref type="rfc" data="rfc3764"/>,Section 6.       </security>       <usage>COMMON</usage>       <registrationdocs>         <xref type="rfc" data="rfc3764"/> (updated byRFC 6118)         <xref type="rfc" data="RFC 6118"/>       </registrationdocs>       <requesters>         <xref type="person" data="Jon_Peterson"/>       </requesters>       <additionalinfo>         <paragraph>           See <xref type="rfc" data="rfc3764"/>,Section 3.         </paragraph>       </additionalinfo>     </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 22]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.18.  sms:mailto    <record>      <!-- sms:mailto -->      <class>Application-Based, Common</class>      <type>sms</type>      <subtype>mailto</subtype>      <urischeme>mailto</urischeme>      <functionalspec>        <paragraph>          This Enumservice indicates that the resource          identified by the associated URI is capable          of receiving a message using an email protocol.        </paragraph>        <paragraph>          SMS content is sent over SMTP using the format          specified by TS 23.140 [15]Section 8.4.4 and TS          26.140 [16]Section 4, as an MMS message.  Within          such a message, SMS content is carried as either a          text or application/octet-stream MIME sub-part (see          TS 26.140 [16],Section 4.1)        </paragraph>        <paragraph>          References are contained in <xref type="rfc" data="rfc4355"/>.        </paragraph>      </functionalspec>      <security>        <paragraph>          There are no specific security issues with this          Enumservice.  However, the general considerations ofSection 6 of <xref type="rfc" data="rfc4355"/> apply.        </paragraph>      </security>      <usage>COMMON</usage>      <registrationdocs>        <xref type="rfc" data="rfc4355"/> (updated byRFC 6118)        <xref type="rfc" data="RFC 6118"/>      </registrationdocs>      <requesters>        <xref type="person" data="Rudolf_Brandner"/>        <xref type="person" data="Lawrence_Conroy"/>        <xref type="person" data="Richard_Stastny"/>      </requesters>    </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 23]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.19.  sms:tel    <record>      <!-- sms:tel -->      <class>Application-Based, Common</class>      <type>sms</type>      <subtype>tel</subtype>      <urischeme>tel</urischeme>      <functionalspec>        <paragraph>          This Enumservice indicates that the resource          identified by the associated URI is capable          of receiving a message using the Short Message          Service (SMS) [14].        </paragraph>        <paragraph>          References are contained in <xref type="rfc" data="rfc4355"/>.        </paragraph>      </functionalspec>      <security>        <paragraph>          There are no specific security issues with this          Enumservice.  However, the general considerations ofSection 6 of <xref type="rfc" data="rfc4355"/> apply.        </paragraph>      </security>      <usage>COMMON</usage>      <registrationdocs>        <xref type="rfc" data="rfc4355"/> (updated byRFC 6118)        <xref type="rfc" data="RFC 6118"/>      </registrationdocs>      <requesters>        <xref type="person" data="Rudolf_Brandner"/>        <xref type="person" data="Lawrence_Conroy"/>        <xref type="person" data="Richard_Stastny"/>      </requesters>    </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 24]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.20.  unifmsg:http    <record>      <!-- unifmsg:http -->      <class>Application-Based, Common</class>      <type>unifmsg</type>      <subtype>http</subtype>      <urischeme>http</urischeme>      <functionalspec>        <paragraph>          This Enumservice indicates that the resource identified by          the associated URI scheme is capable of being a source of          information.        </paragraph>        <paragraph>          Note that the kind of information retrieved can be manifold.          Usually, contacting a resource by an 'http:' [11] URI          provides a document.  This document can contain references          that will trigger the download of many different kinds of          information, such as text, audio, video, executable code, or          even video message files.  Thus, one cannot be more specific          about the kind of information expected when contacting the          resource.        </paragraph>        <paragraph>          References are contained in <xref type="rfc" data="rfc5278"/>.        </paragraph>      </functionalspec>      <security>        See <xref type="rfc" data="rfc5278"/>,Section 3.      </security>      <usage>COMMON</usage>      <registrationdocs>        <xref type="rfc" data="rfc5278"/> (updated byRFC 6118)        <xref type="rfc" data="RFC 6118"/>      </registrationdocs>      <requesters>        <xref type="person" data="Jason_Livingood"/>        <xref type="person" data="Don_Troshynski"/>      </requesters>      <additionalinfo>        <paragraph>          Implementers should review a non-exclusive list of examples          inSection 7 of <xref type="rfc" data="rfc5278"/>.        </paragraph>      </additionalinfo>    </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 25]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.21.  unifmsg:https    <record>      <!-- unifmsg:https -->      <class>Application-Based, Common</class>      <type>unifmsg</type>      <subtype>https</subtype>      <urischeme>https</urischeme>      <functionalspec>        <paragraph>          This Enumservice indicates that the resource identified by          the associated URI scheme is capable of being a source of          information, which can be contacted using TLS or the Secure          Socket Layer protocol.        </paragraph>        <paragraph>          Note that the kind of information retrieved can be manifold.          Usually, contacting a resource by an 'https:' [12] URI          provides a document.  This document can contain references          that will trigger the download of many different kinds of          information, such as text, audio, video, executable code, or          even video message files.  Thus, one cannot be more specific          about the kind of information expected when contacting the          resource.        </paragraph>        <paragraph>          References are contained in <xref type="rfc" data="rfc5278"/>.        </paragraph>      </functionalspec>      <security>        See <xref type="rfc" data="rfc5278"/>,Section 3.      </security>      <usage>COMMON</usage>      <registrationdocs>        <xref type="rfc" data="rfc5278"/> (updated byRFC 6118)        <xref type="rfc" data="RFC 6118"/>      </registrationdocs>      <requesters>        <xref type="person" data="Jason_Livingood"/>        <xref type="person" data="Don_Troshynski"/>      </requesters>      <additionalinfo>        <paragraph>          Implementers should review a non-exclusive list of examples          inSection 7 of <xref type="rfc" data="rfc5278"/>.        </paragraph>      </additionalinfo>    </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 26]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.22.  unifmsg:sip     <record>       <!-- unifmsg:sip -->       <class>Application-Based, Common</class>       <type>unifmsg</type>       <subtype>sip</subtype>       <urischeme>sip</urischeme>       <functionalspec>         <paragraph>           This Enumservice indicates that the resource identified can           be addressed by the associated URI scheme in order to           initiate a unified communication session to a unified           messaging system.         </paragraph>       </functionalspec>       <security>         See <xref type="rfc" data="rfc5278"/>,Section 3.       </security>       <usage>COMMON</usage>       <registrationdocs>         <xref type="rfc" data="rfc5278"/> (updated byRFC 6118)         <xref type="rfc" data="RFC 6118"/>       </registrationdocs>       <requesters>         <xref type="person" data="Jason_Livingood"/>         <xref type="person" data="Don_Troshynski"/>       </requesters>       <additionalinfo>         <paragraph>           Implementers should review a non-exclusive list of examples           inSection 7 of <xref type="rfc" data="rfc5278"/>.         </paragraph>       </additionalinfo>     </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 27]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.23.  unifmsg:sips     <record>       <!-- unifmsg:sips -->       <class>Application-Based, Common</class>       <type>unifmsg</type>       <subtype>sips</subtype>       <urischeme>sips</urischeme>       <functionalspec>         <paragraph>           This Enumservice indicates that the resource identified can           be addressed by the associated URI scheme in order to           initiate a unified communication session to a unified           messaging system.         </paragraph>       </functionalspec>       <security>         See <xref type="rfc" data="rfc5278"/>,Section 3.       </security>       <usage>COMMON</usage>       <registrationdocs>         <xref type="rfc" data="rfc5278"/> (updated byRFC 6118)         <xref type="rfc" data="RFC 6118"/>       </registrationdocs>       <requesters>         <xref type="person" data="Jason_Livingood"/>         <xref type="person" data="Don_Troshynski"/>       </requesters>       <additionalinfo>         <paragraph>           Implementers should review a non-exclusive list of examples           inSection 7 of <xref type="rfc" data="rfc5278"/>.         </paragraph>       </additionalinfo>     </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 28]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.24.  vcard    <record>      <!-- vcard -->      <class>Data Type-Based</class>      <type>vcard</type>      <!-- No subtype -->      <urischeme>http</urischeme>      <urischeme>https</urischeme>      <functionalspec>        <paragraph>          This Enumservice indicates that the resource          identified is a plain vCard, according toRFC2426,          which may be accessed using HTTP / HTTPS [7].        </paragraph>        <paragraph>          Clients fetching the vCard from the resource          indicated should expect access to be          restricted.  Additionally, the comprehension of the          data provided may vary depending on the client's          identity.        </paragraph>        <paragraph>          References are contained in <xref type="rfc" data="rfc4969"/>.        </paragraph>      </functionalspec>      <security>        See <xref type="rfc" data="rfc4969"/>,Section 5.      </security>      <usage>COMMON</usage>      <registrationdocs>        <xref type="rfc" data="rfc4969"/> (updated byRFC 6118)        <xref type="rfc" data="RFC 6118"/>      </registrationdocs>      <requesters>        <xref type="person" data="Alexander_Mayrhofer"/>      </requesters>    </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 29]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.25.  videomsg:http    <record>      <!-- videomsg:http -->      <class>Application-Based, Common</class>      <type>videomsg</type>      <subtype>http</subtype>      <urischeme>http</urischeme>      <functionalspec>        <paragraph>          This Enumservice indicates that the resource identified by          the associated URI scheme is capable of being a source of          information.        </paragraph>        <paragraph>          Note that the kind of information retrieved can be manifold.          Usually, contacting a resource by an 'http:' [11] URI          provides a document.  This document can contain references          that will trigger the download of many different kinds of          information, such as text, audio, video, executable code, or          even video message files.  Thus, one cannot be more specific          about the kind of information expected when contacting the          resource.        </paragraph>        <paragraph>          References are contained in <xref type="rfc" data="rfc5278"/>.        </paragraph>      </functionalspec>      <security>        See <xref type="rfc" data="rfc5278"/>,Section 3.      </security>      <usage>COMMON</usage>      <registrationdocs>        <xref type="rfc" data="rfc5278"/> (updated byRFC 6118)        <xref type="rfc" data="RFC 6118"/>      </registrationdocs>      <requesters>        <xref type="person" data="Jason_Livingood"/>        <xref type="person" data="Don_Troshynski"/>      </requesters>      <additionalinfo>        <paragraph>          Implementers should review a non-exclusive list of examples          inSection 7 of <xref type="rfc" data="rfc5278"/>.        </paragraph>      </additionalinfo>    </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 30]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.26.  videomsg:https    <record>      <!-- videomsg:https -->      <class>Application-Based, Common</class>      <type>videomsg</type>      <subtype>https</subtype>      <urischeme>https</urischeme>      <functionalspec>        <paragraph>          This Enumservice indicates that the resource identified by          the associated URI scheme is capable of being a source of          information, which can be contacted using TLS or the Secure          Socket Layer protocol.        </paragraph>        <paragraph>          Note that the kind of information retrieved can be manifold.          Usually, contacting a resource by an 'https:' [12] URI          provides a document.  This document can contain references          that will trigger the download of many different kinds of          information, such as text, audio, video, executable code, or          even video message files.  Thus, one cannot be more specific          about the kind of information expected when contacting the          resource.        </paragraph>        <paragraph>          References are contained in <xref type="rfc" data="rfc5278"/>.        </paragraph>      </functionalspec>      <security>        See <xref type="rfc" data="rfc5278"/>,Section 3.      </security>      <usage>COMMON</usage>      <registrationdocs>        <xref type="rfc" data="rfc5278"/> (updated byRFC 6118)        <xref type="rfc" data="RFC 6118"/>      </registrationdocs>      <requesters>        <xref type="person" data="Jason_Livingood"/>        <xref type="person" data="Don_Troshynski"/>      </requesters>      <additionalinfo>        <paragraph>          Implementers should review a non-exclusive list of examples          inSection 7 of <xref type="rfc" data="rfc5278"/>.        </paragraph>      </additionalinfo>    </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 31]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.27.  videomsg:sip     <record>       <!-- videomsg:sip -->       <class>Application-Based, Common</class>       <type>videomsg</type>       <subtype>sip</subtype>       <urischeme>sip</urischeme>       <functionalspec>         <paragraph>           This Enumservice indicates that the resource identified can           be addressed by the associated URI scheme in order to           initiate a video communication session to a video messaging           system.         </paragraph>       </functionalspec>       <security>         See <xref type="rfc" data="rfc5278"/>,Section 3.       </security>       <usage>COMMON</usage>       <registrationdocs>         <xref type="rfc" data="rfc5278"/> (updated byRFC 6118)         <xref type="rfc" data="RFC 6118"/>       </registrationdocs>       <requesters>         <xref type="person" data="Jason_Livingood"/>         <xref type="person" data="Don_Troshynski"/>       </requesters>       <additionalinfo>         <paragraph>           Implementers should review a non-exclusive list of examples           inSection 7 of <xref type="rfc" data="rfc5278"/>.         </paragraph>       </additionalinfo>     </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 32]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.28.  videomsg:sips     <record>       <!-- videomsg:sips -->       <class>Application-Based, Common</class>       <type>videomsg</type>       <subtype>sips</subtype>       <urischeme>sips</urischeme>       <functionalspec>         <paragraph>           This Enumservice indicates that the resource identified can           be addressed by the associated URI scheme in order to           initiate a video communication session to a video messaging           system.         </paragraph>       </functionalspec>       <security>         See <xref type="rfc" data="rfc5278"/>,Section 3.       </security>       <usage>COMMON</usage>       <registrationdocs>         <xref type="rfc" data="rfc5278"/> (updated byRFC 6118)         <xref type="rfc" data="RFC 6118"/>       </registrationdocs>       <requesters>         <xref type="person" data="Jason_Livingood"/>         <xref type="person" data="Don_Troshynski"/>       </requesters>       <additionalinfo>         <paragraph>           Implementers should review a non-exclusive list of examples           inSection 7 of <xref type="rfc" data="rfc5278"/>.         </paragraph>       </additionalinfo>     </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 33]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.29.  voice:tel    <record>      <!-- voice:tel -->      <class>Application-Based, Common</class>      <type>voice</type>      <subtype>tel</subtype>      <urischeme>tel</urischeme>      <functionalspec>        <paragraph>          The kind of communication indicated by this          Enumservice is "Interactive Voice".  From a protocol          perspective, this communication is expected to          involve bidirectional media streams carrying audio          data.        </paragraph>        <paragraph>          A client may imply that the person controlling          population of a NAPTR holding this Enumservice          indicates their capability to engage in an          interactive voice session when contacted using the          URI generated by this NAPTR.        </paragraph>      </functionalspec>      <security>        See <xref type="rfc" data="rfc4415"/>,Section 5.      </security>      <usage>COMMON</usage>      <registrationdocs>        <xref type="rfc" data="rfc4415"/> (updated byRFC 6118)        <xref type="rfc" data="RFC 6118"/>      </registrationdocs>      <requesters>        <xref type="person" data="Rudolf_Brandner"/>        <xref type="person" data="Lawrence_Conroy"/>        <xref type="person" data="Richard_Stastny"/>      </requesters>      <additionalinfo>        <paragraph>          This Enumservice indicates that the person          responsible for the NAPTR is accessible via the PSTN          (Public Switched Telephone Network) or PLMN (Public          Land Mobile Network) using the value of the          generated URI.        </paragraph>        <paragraph>The kind of subsystem required to initiate a          Voice Enumservice with this Subtype is a "Dialler".          This is a subsystem that either provides a localHoeneisen & Mayrhofer        Standards Track                   [Page 34]

RFC 6118         Update Legacy Enumservice Registrations      March 2011          connection to the PSTN or PLMN, or that provides an          indirect connection to those networks.  The          subsystem will use the telephone number held in the          generated URI to place a voice call.  The voice call          is placed to a network that uses E.164 numbers to          route calls to an appropriate destination.        </paragraph>        <paragraph>          Note that the PSTN/PLMN connection may be          indirect.  The end user receiving this NAPTR may          have a relationship with a Communications Service          Provider that accepts call initiation requests from          that subsystem using an IP-based protocol such as          SIP or H.323, and places the call to the PSTN using          a remote gateway service.  In this case, the Provider          may either accept requests using "tel:" URIs or has          a defined mechanism to convert "tel:" URI values          into a "protocol-native" form.        </paragraph>        <paragraph>          The "tel:" URI value SHOULD be fully qualified          (using the "global phone number" form ofRFC 3966          [10]).  A "local phone number" as defined in that          document SHOULD NOT be used unless the controller of          the zone in which the NAPTR appears is sure that it          can be distinguished unambiguously by all clients          that can access the resource record and that a call          from their network access points can be routed to          that destination.        </paragraph>        <paragraph>          References are contained in <xref type="rfc" data="rfc4415"/>.        </paragraph>      </additionalinfo>    </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 35]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.30.  voicemsg:http    <record>      <!-- voicemsg:http -->      <class>Application-Based, Common</class>      <type>voicemsg</type>      <subtype>http</subtype>      <urischeme>http</urischeme>      <functionalspec>        <paragraph>          This Enumservice indicates that the resource identified by          the associated URI scheme is capable of being a source of          information.        </paragraph>        <paragraph>          Note that the kind of information retrieved can be manifold.          Usually, contacting a resource by an 'http:' [11] URI          provides a document.  This document can contain references          that will trigger the download of many different kinds of          information, such as text, audio, video, executable code, or          even voice message files.  Thus, one cannot be more specific          about the kind of information expected when contacting the          resource.        </paragraph>        <paragraph>          References are contained in <xref type="rfc" data="rfc5278"/>.        </paragraph>      </functionalspec>      <security>        See <xref type="rfc" data="rfc5278"/>,Section 3.      </security>      <usage>COMMON</usage>      <registrationdocs>        <xref type="rfc" data="rfc5278"/> (updated byRFC 6118)        <xref type="rfc" data="RFC 6118"/>      </registrationdocs>      <requesters>        <xref type="person" data="Jason_Livingood"/>        <xref type="person" data="Don_Troshynski"/>      </requesters>      <additionalinfo>        <paragraph>          Implementers should review a non-exclusive list of examples          inSection 7 of <xref type="rfc" data="rfc5278"/>.        </paragraph>      </additionalinfo>    </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 36]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.31.  voicemsg:https    <record>      <!-- voicemsg:https -->      <class>Application-Based, Common</class>      <type>voicemsg</type>      <subtype>https</subtype>      <urischeme>https</urischeme>      <functionalspec>        <paragraph>          This Enumservice indicates that the resource identified by          the associated URI scheme is capable of being a source of          information, which can be contacted using TLS or the Secure          Socket Layer protocol.        </paragraph>        <paragraph>          Note that the kind of information retrieved can be manifold.          Usually, contacting a resource by an 'https:' [12] URI          provides a document.  This document can contain references          that will trigger the download of many different kinds of          information, such as text, audio, video, executable code, or          even voice message files.  Thus, one cannot be more specific          about the kind of information expected when contacting the          resource.        </paragraph>        <paragraph>          References are contained in <xref type="rfc" data="rfc5278"/>.        </paragraph>      </functionalspec>      <security>        See <xref type="rfc" data="rfc5278"/>,Section 3.      </security>      <usage>COMMON</usage>      <registrationdocs>        <xref type="rfc" data="rfc5278"/> (updated byRFC 6118)        <xref type="rfc" data="RFC 6118"/>      </registrationdocs>      <requesters>        <xref type="person" data="Jason_Livingood"/>        <xref type="person" data="Don_Troshynski"/>      </requesters>      <additionalinfo>        <paragraph>          Implementers should review a non-exclusive list of examples          inSection 7 of <xref type="rfc" data="rfc5278"/>.        </paragraph>      </additionalinfo>    </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 37]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.32.  voicemsg:sip     <record>       <!-- voicemsg:sip -->       <class>Application-Based, Common</class>       <type>voicemsg</type>       <subtype>sip</subtype>       <urischeme>sip</urischeme>       <functionalspec>         <paragraph>           This Enumservice indicates that the resource identified can           be addressed by the associated URI scheme in order to           initiate a voice communication session to a voice messaging           system.         </paragraph>       </functionalspec>       <security>         See <xref type="rfc" data="rfc5278"/>,Section 3.       </security>       <usage>COMMON</usage>       <registrationdocs>         <xref type="rfc" data="rfc5278"/> (updated byRFC 6118)         <xref type="rfc" data="RFC 6118"/>       </registrationdocs>       <requesters>         <xref type="person" data="Jason_Livingood"/>         <xref type="person" data="Don_Troshynski"/>       </requesters>       <additionalinfo>         <paragraph>           Implementers should review a non-exclusive list of examples           inSection 7 of <xref type="rfc" data="rfc5278"/>.         </paragraph>       </additionalinfo>     </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 38]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.33.  voicemsg:sips     <record>       <!-- voicemsg:sips -->       <class>Application-Based, Common</class>       <type>voicemsg</type>       <subtype>sips</subtype>       <urischeme>sips</urischeme>       <functionalspec>         <paragraph>           This Enumservice indicates that the resource identified can           be addressed by the associated URI scheme in order to           initiate a voice communication session to a voice messaging           system.         </paragraph>       </functionalspec>       <security>         See <xref type="rfc" data="rfc5278"/>,Section 3.       </security>       <usage>COMMON</usage>       <registrationdocs>         <xref type="rfc" data="rfc5278"/> (updated byRFC 6118)         <xref type="rfc" data="RFC 6118"/>       </registrationdocs>       <requesters>         <xref type="person" data="Jason_Livingood"/>         <xref type="person" data="Don_Troshynski"/>       </requesters>       <additionalinfo>         <paragraph>           Implementers should review a non-exclusive list of examples           inSection 7 of <xref type="rfc" data="rfc5278"/>.         </paragraph>       </additionalinfo>     </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 39]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.34.  voicemsg:tel     <record>       <!-- voicemsg:tel -->       <class>Application-Based, Common</class>       <type>voicemsg</type>       <subtype>tel</subtype>       <urischeme>tel</urischeme>       <functionalspec>         <paragraph>           This Enumservice indicates that the resource identified can           be addressed by the associated URI scheme in order to           initiate a voice communication session to a voice messaging           system.         </paragraph>       </functionalspec>       <security>         See <xref type="rfc" data="rfc5278"/>,Section 3.       </security>       <usage>COMMON</usage>       <registrationdocs>         <xref type="rfc" data="rfc5278"/> (updated byRFC 6118)         <xref type="rfc" data="RFC 6118"/>       </registrationdocs>       <requesters>         <xref type="person" data="Jason_Livingood"/>         <xref type="person" data="Don_Troshynski"/>       </requesters>       <additionalinfo>         <paragraph>           Implementers should review a non-exclusive list of examples           inSection 7 of <xref type="rfc" data="rfc5278"/>.         </paragraph>       </additionalinfo>     </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 40]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.35.  vpim:ldap     <record>       <!-- vpim:ldap -->       <class>Data Type-Based</class>       <type>vpim</type>       <subtype>ldap</subtype>       <urischeme>ldap</urischeme>       <functionalspec>         See <xref type="rfc" data="rfc4238"/>,Section 3.2 - 3.3.       </functionalspec>       <security>         <paragraph>           Malicious Redirection:           One of the fundamental dangers related to any           service such as this is that a malicious entry in a           resolver's database will cause clients to resolve           the E.164 into the wrong LDAP URI.  The possible           intent may be to cause the client to connect to a           rogue LDAP server and retrieve (or fail to retrieve)           a resource containing fraudulent or damaging           information.         </paragraph>         <paragraph>           Denial of Service:           By removing the URI to which the E.164 maps, a           malicious intruder may remove the client's ability           to access the LDAP directory server.         </paragraph>       </security>       <usage>COMMON</usage>       <registrationdocs>         <xref type="rfc" data="rfc4238"/> (updated byRFC 6118)         <xref type="rfc" data="RFC 6118"/>       </registrationdocs>       <requesters>         <xref type="person" data="Greg_Vaudreuil"/>       </requesters>     </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 41]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.36.  vpim:mailto     <record>       <!-- vpim:mailto -->       <class>Data Type-Based</class>       <type>vpim</type>       <subtype>mailto</subtype>       <urischeme>mailto</urischeme>       <functionalspec>         See <xref type="rfc" data="rfc4238"/>,Section 4.2 - 4.4.       </functionalspec>       <security>         <paragraph>           Malicious Redirection:           One of the fundamental dangers related to any           service such as this is that a malicious entry in a           resolver's database will cause clients to resolve           the E.164 into the wrong email URI.  The possible           intent may be to cause the client to send the           information to an incorrect destination.         </paragraph>         <paragraph>           Denial of Service:           By removing the URI to which the E.164 maps, a           malicious intruder may remove the client's ability           to access the resource.         </paragraph>         <paragraph>           Unsolicited Bulk Email:           The exposure of email addresses through the ENUM           service provides a bulk mailer access to large           numbers of email addresses where only the telephone           number was previously known.         </paragraph>       </security>       <usage>COMMON</usage>       <registrationdocs>         <xref type="rfc" data="rfc4238"/> (updated byRFC 6118)         <xref type="rfc" data="RFC 6118"/>       </registrationdocs>       <requesters>         <xref type="person" data="Greg_Vaudreuil"/>       </requesters>       <additionalinfo>         <paragraph>           Error Conditions:         </paragraph>         <paragraph>Hoeneisen & Mayrhofer        Standards Track                   [Page 42]

RFC 6118         Update Legacy Enumservice Registrations      March 2011           E.164 number not in the numbering plan         </paragraph>         <paragraph>           E.164 number in the numbering plan, but no           URIs exist for that number         </paragraph>         <paragraph>           E2U+vpim:mailto Service unavailable of email           addresses where only the telephone number was           previously known.         </paragraph>       </additionalinfo>     </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 43]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.37.  web:http     <record>       <!-- web:http -->       <class>Application-Based, Common</class>       <type>web</type>       <subtype>http</subtype>       <urischeme>http</urischeme>       <functionalspec>         <paragraph>           This Enumservice indicates that the resource           identified by the associated URI is capable           of being a source of information.  It has to be           noted that the kind of information retrieved can be           manifold.  Usually, contacting a resource by an           "http:" URI provides a document.  This document can           contain references that will trigger download of           many different kinds of information, like audio or           video or executable code.  Thus, one cannot be more           specific about the kind of information that can be           expected when contacting the resource.         </paragraph>       </functionalspec>       <security>         See <xref type="rfc" data="rfc4002"/>,Section 5.       </security>       <usage>COMMON</usage>       <registrationdocs>         <xref type="rfc" data="rfc4002"/> (updated byRFC 6118)         <xref type="rfc" data="RFC 6118"/>       </registrationdocs>       <requesters>         <xref type="person" data="Rudolf_Brandner"/>         <xref type="person" data="Lawrence_Conroy"/>         <xref type="person" data="Richard_Stastny"/>       </requesters>     </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 44]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.38.  web:https     <record>       <!-- web:https -->       <class>Application-Based, Common</class>       <type>web</type>       <subtype>https</subtype>       <urischeme>https</urischeme>       <functionalspec>         <paragraph>           This Enumservice indicates that the resource           identified by the associated URI is capable           of being a source of information, which can be           contacted by using TLS or the Secure Socket Layer           protocol.  It has to be noted that the kind of           information retrieved can be manifold.  Usually,           contacting a resource by an "https:" URI provides a           document.  This document can contain all different           kinds of information, like audio or video or           executable code.  Thus, one cannot be more specific           what information to expect when contacting the           resource.         </paragraph>       </functionalspec>       <security>         See <xref type="rfc" data="rfc4002"/>,Section 5.       </security>       <usage>COMMON</usage>       <registrationdocs>         <xref type="rfc" data="rfc4002"/> (updated byRFC 6118)         <xref type="rfc" data="RFC 6118"/>       </registrationdocs>       <requesters>         <xref type="person" data="Rudolf_Brandner"/>         <xref type="person" data="Lawrence_Conroy"/>         <xref type="person" data="Richard_Stastny"/>       </requesters>     </record>Hoeneisen & Mayrhofer        Standards Track                   [Page 45]

RFC 6118         Update Legacy Enumservice Registrations      March 20114.39.  xmpp     <record>       <!-- xmpp -->       <class>Protocol-Based</class>       <type>xmpp</type>       <!-- No subtype -->       <urischeme>xmpp</urischeme>       <functionalspec>         <paragraph>           This Enumservice indicates that the resource           identified is an XMPP entity.         </paragraph>       </functionalspec>       <security>         See <xref type="rfc" data="rfc4979"/>,Section 6.       </security>       <usage>COMMON</usage>       <registrationdocs>         <xref type="rfc" data="rfc4979"/> (updated byRFC 6118)         <xref type="rfc" data="RFC 6118"/>       </registrationdocs>       <requesters>         <xref type="person" data="Alexander_Mayrhofer"/>       </requesters>     </record>5.  IANA Considerations   IANA replaced all legacy Enumservice Registrations as perSection 4.6.  Security Considerations   Since this document does not introduce any technology or protocol,   there are no security issues to be considered for this document   itself.7.  Acknowledgements   The authors would like to thank the following people who have   provided feedback or significant contributions to the development of   this document: Jari Arkko, Scott Bradner, Gonzalo Camarillo, Alfred   Hoenes, Ari Keranen, and Alexey Melnikov.Hoeneisen & Mayrhofer        Standards Track                   [Page 46]

RFC 6118         Update Legacy Enumservice Registrations      March 20118.  References8.1.  Normative References   [RFC2026]  Bradner, S., "The Internet Standards Process -- Revision              3",BCP 9,RFC 2026, October 1996.   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate              Requirement Levels",BCP 14,RFC 2119, March 1997.   [RFC3761]  Faltstrom, P. and M. Mealling, "The E.164 to Uniform              Resource Identifiers (URI) Dynamic Delegation Discovery              System (DDDS) Application (ENUM)",RFC 3761, April 2004.   [RFC3762]  Levin, O., "Telephone Number Mapping (ENUM) Service              Registration for H.323",RFC 3762, April 2004.   [RFC3764]  Peterson, J., "enumservice registration for Session              Initiation Protocol (SIP) Addresses-of-Record",RFC 3764,              April 2004.   [RFC3953]  Peterson, J., "Telephone Number Mapping (ENUM) Service              Registration for Presence Services",RFC 3953,              January 2005.   [RFC4002]  Brandner, R., Conroy, L., and R. Stastny, "IANA              Registration for Enumservice 'web' and 'ft'",RFC 4002,              February 2005.   [RFC4143]  Toyoda, K. and D. Crocker, "Facsimile Using Internet Mail              (IFAX) Service of ENUM",RFC 4143, November 2005.   [RFC4238]  Vaudreuil, G., "Voice Message Routing Service",RFC 4238,              October 2005.   [RFC4355]  Brandner, R., Conroy, L., and R. Stastny, "IANA              Registration for Enumservices email, fax, mms, ems, and              sms",RFC 4355, January 2006.   [RFC4415]  Brandner, R., Conroy, L., and R. Stastny, "IANA              Registration for Enumservice Voice",RFC 4415,              February 2006.   [RFC4769]  Livingood, J. and R. Shockey, "IANA Registration for an              Enumservice Containing Public Switched Telephone Network              (PSTN) Signaling Information",RFC 4769, November 2006.Hoeneisen & Mayrhofer        Standards Track                   [Page 47]

RFC 6118         Update Legacy Enumservice Registrations      March 2011   [RFC4969]  Mayrhofer, A., "IANA Registration for vCard Enumservice",RFC 4969, August 2007.   [RFC4979]  Mayrhofer, A., "IANA Registration for Enumservice 'XMPP'",RFC 4979, August 2007.   [RFC5028]  Mahy, R., "A Telephone Number Mapping (ENUM) Service              Registration for Instant Messaging (IM) Services",RFC 5028, October 2007.   [RFC5278]  Livingood, J. and D. Troshynski, "IANA Registration of              Enumservices for Voice and Video Messaging",RFC 5278,              July 2008.   [RFC5333]  Mahy, R. and B. Hoeneisen, "IANA Registration of              Enumservices for Internet Calendaring",RFC 5333,              October 2009.   [RFC6117]  Hoeneisen, B., Mayrhofer, A., and J. Livingood, "IANA              Registration of Enumservices: Guide, Template, and IANA              Considerations",RFC 6117, March 2011.8.2.  Informative References   [RFC5226]  Narten, T. and H. Alvestrand, "Guidelines for Writing an              IANA Considerations Section in RFCs",BCP 26,RFC 5226,              May 2008.Hoeneisen & Mayrhofer        Standards Track                   [Page 48]

RFC 6118         Update Legacy Enumservice Registrations      March 2011Appendix A.  Former Content of the IANA Repository Enumservice Registrations (last updated 2009-10-13) Registries included below: - Enumservice Registrations Registry Name: Enumservice Registrations Reference: [RFC3761] Registration Procedures: Require an RFC approved by the IESG Note: Enumservice specifications contain the functional specification (i.e. what it can be used for), the valid protocols, and the URI schemes that may be returned. Registry: Service Name: "H323"      URI Scheme(s): "h323:"      Functional Specification:         See Section "3. The E2U+H323 ENUM Service" of [RFC3762]      Security considerations:         see section "5. Security Considerations" of [RFC3762]      Intended usage: COMMON      Author: Orit Levin      [RFC3762] Service Name: "SIP"      Type(s): "SIP"      Subtype(s): N/A      URI Scheme(s): "sip", "sips:"      Functional Specification: seeSection 4 of [RFC3764]      Security considerations: seeSection 6 of [RFC3764]      Intended usage: COMMON      Author: Jon Peterson (jon.peterson&neustar.biz)      Any other information that the author deems interesting:         seeSection 3 of [RFC3764]      [RFC3764]Hoeneisen & Mayrhofer        Standards Track                   [Page 49]

RFC 6118         Update Legacy Enumservice Registrations      March 2011 Service Name: "ifax"     Type: "ifax"     Subtype: "mailto"     URI Scheme: "mailto"        The URI Scheme is "mailto" because facsimile is a profile of        standard Internet mail and uses standard Internet mail        addressing.     Functional Specification: seesection 1 of [RFC4143]     Security Considerations: seesection 3 of [RFC4143]     Intended usage: COMMON     Author: Kiyoshi Toyoda(toyoda.kiyoshi&jp.panasonic.com)             Dave Crocker(dcrocker&brandenburg.com)     [RFC4143] Service Name: "pres"     URI Scheme(s): "pres:"     Functional Specification: seeSection 4 of [RFC3953]     Security considerations: seeSection 6 of [RFC3953]     Intended usage: COMMON     Author: Jon Peterson (jon.peterson&neustar.biz)     Any other information that the author deems interesting:        SeeSection 3 of [RFC3953]     [RFC3953] Service Name: "web"     Type: "web"     Subtype: "http"     URI Scheme: 'http:'     Functional Specification:        This ENUMservice indicates that the resource identified by the        associated URI scheme is capable of being a source of        information.  It has to be noted that the kind of information        retrieved can be manifold.  Usually, contacting a resource by an        'http:' URI provides a document.  This document can contain        references that will trigger download of many different kinds        of information, like audio or video or executable code.  Thus,        one can not be more specific about the kind of information that        can be expected when contacting the resource.     Security Considerations:        Seesection 5 of [RFC4002].     Intended Usage: COMMON     Authors:        Rudolf Brandner (rudolf.brandner&siemens.com)        Lawrence Conroy (lwc&roke.co.uk)        Richard Stastny (richard.stastny&oefeg.at)     Any other information the author deems interesting:  None     [RFC4002]Hoeneisen & Mayrhofer        Standards Track                   [Page 50]

RFC 6118         Update Legacy Enumservice Registrations      March 2011 Service Name: "web"     Type: "web"     Subtype: "https"     URI Scheme: 'https:'     Functional Specification:        This ENUMservice indicates that the resource identified by the        associated URI scheme is capable of being a source of        information, which can be contacted by using TLS or Secure        Socket Layer protocol.  It has to be noted that the kind of        information retrieved can be manifold.  Usually, contacting a        resource by an 'https:' URI provides a document.  This document        can contain all different kind of information, like audio or        video or executable code.  Thus, one can not be more specific        what information to expect when contacting the resource.     Security Considerations:        Seesection 5 of [RFC4002].     Intended Usage: COMMON     Authors:        Rudolf Brandner (rudolf.brandner&siemens.com)        Lawrence Conroy (lwc&roke.co.uk)        Richard Stastny (richard.stastny&oefeg.at)     Any other information the author deems interesting:  None     [RFC4002] Service Name: "ft"     Type: "ft"     Subtype: "ftp"     URI Scheme: 'ftp:'     Functional Specification:        This ENUMservice indicates that the resource identified by the        associated URI scheme is a file service from which a file or        file listing can be retrieved.     Security Considerations:        Seesection 5 of [RFC4002].     Intended Usage: COMMON     Authors:        Rudolf Brandner (rudolf.brandner&siemens.com)        Lawrence Conroy (lwc&roke.co.uk)        Richard Stastny (richard.stastny&oefeg.at)     Any other information the author deems interesting: None     [RFC4002]Hoeneisen & Mayrhofer        Standards Track                   [Page 51]

RFC 6118         Update Legacy Enumservice Registrations      March 2011 Enumservice Name: "email"    Enumservice Type: "email"    Enumservice Subtype: "mailto"    URI Scheme: 'mailto:'    Functional Specification:       This Enumservice indicates that the remote resource can be       addressed by the associated URI scheme in order to send an       email.    Security Considerations:       SeeSection 6 of [RFC4355]    Intended Usage: COMMON    Authors:       Rudolf Brandner, Lawrence Conroy, Richard Stastny (for author       contact detail see [RFC4355])    Any other information the author deems interesting:       None Enumservice Name: "fax"    Enumservice Type: "fax"    Enumservice Subtype: "tel"    URI Scheme: 'tel:'    Functional Specification:       This Enumservice indicates that the resource identified by the       associated URI scheme is capable of being contacted to provide       a communication session during which facsimile documents can be       sent.       A client selecting this NAPTR will have support for generating       and sending facsimile documents to the recipient using the PSTN       session and transfer protocols specified in [12] and [13] in       [RFC4355]  - in short, they will have a fax       program with a local or shared PSTN access over which they can       send faxes.    Security Considerations:       SeeSection 6 of [RFC4355]    Intended Usage: COMMON    Authors:       Rudolf Brandner, Lawrence Conroy, Richard Stastny (for author       contact detail see  [RFC4355])    Any other information the author deems interesting:       NoneHoeneisen & Mayrhofer        Standards Track                   [Page 52]

RFC 6118         Update Legacy Enumservice Registrations      March 2011 Enumservice Name: "sms"    Enumservice Type: "sms"    Enumservice Subtypes: "tel"    URI Scheme: 'tel:'    Functional Specification:       This Enumservice indicates that the resource identified by the       associated URI scheme is capable of receiving a message using       the Short Message Service (SMS) [14] in [RFC4355].    Security Considerations:       There are no specific security issues with this Enumservice.       However, the general considerations ofSection 6 apply.    Intended Usage: COMMON    Authors:       Rudolf Brandner, Lawrence Conroy, Richard Stastny (for author       contact detail see [RFC4355])    Any other information the author deems interesting:       None Enumservice Name: "sms"    Enumservice Type: "sms"    Enumservice Subtypes: "mailto"    URI Scheme: 'mailto:'    Functional Specification:       This Enumservice indicates that the resource identified by the       associated URI scheme is capable of receiving a message using       an email protocol.       SMS content is sent over SMTP using the format specified by TS       23.140 [15]section 8.4.4 and TS 26.140 [16]section 4 (for       references see [RFC4355]), as an MMS message.  Within such a       message, SMS content is carried as either a text or       application/octet-stream MIME sub-part (see TS 26.140 [16] ,section 4.1)       For references see [RFC4355].    Security Considerations:       There are no specific security issues with this Enumservice.       However, the general considerations ofSection 6 apply, see       [RFC4355].    Intended Usage: COMMON    Authors:       Rudolf Brandner, Lawrence Conroy, Richard Stastny (for author       contact detail see [RFC4355])    Any other information the author deems interesting:       NoneHoeneisen & Mayrhofer        Standards Track                   [Page 53]

RFC 6118         Update Legacy Enumservice Registrations      March 2011 Enumservice Name: "ems"    Enumservice Type: "ems"    Enumservice Subtype: "tel"    URI Scheme: 'tel:'    Functional Specification:       This Enumservice indicates that the resource identified by the       associated URI scheme is capable of receiving a message using       the Enhanced Message Service (EMS) [14] (For reference see       [RFC4355]).    Security Considerations:       There are no specific security issues with this Enumservice.       However, the general considerations ofSection 6 apply.       See [RFC4355]    Intended Usage: COMMON    Authors:       Rudolf Brandner, Lawrence Conroy, Richard Stastny (for author       contact detail see [RFC4355])    Any other information the author deems interesting:       Note that an indication of EMS can be taken as implying that       the recipient is capable of receiving SMS messages at this       address as well. Enumservice Name: "ems"    Enumservice Type: "ems"    Enumservice Subtypes: "mailto"    URI Scheme: 'mailto:'    Functional Specification:       This Enumservice indicates that the resource identified by the       associated URI scheme is capable of receiving a message using       an email protocol.       EMS content is sent over SMTP using the format specified by TS       23.140 [15]section 8.4.4 and TS 26.140 [16]section 4, as an       MMS message.  Within such a message, EMS content is carried as       either a text or application/octet-stream MIME sub-part (see       TS 26.140 [16] ,section 4.1).       For references see [RFC4355]    Security Considerations:       There are no specific security issues with this Enumservice.       However, the general considerations ofSection 6 of [RFC4355]       apply.    Intended Usage: COMMON    Authors:       Rudolf Brandner, Lawrence Conroy, Richard Stastny (for author       contact detail see [RFC4355])    Any other information the author deems interesting:       NoneHoeneisen & Mayrhofer        Standards Track                   [Page 54]

RFC 6118         Update Legacy Enumservice Registrations      March 2011 Enumservice Name: "mms"    Enumservice Type: "mms"    Enumservice Subtype: "tel"    URI Scheme: 'tel:'    Functional Specification:       This Enumservice indicates that the resource identified by the       associated URI scheme is capable of receiving a message using       the Multimedia Messaging Service (MMS) [15].       For references see [RFC4355]    Security Considerations:       There are no specific security issues with this Enumservice.       However, the general considerations ofSection 6 of [RFC4355]       apply.    Intended Usage: COMMON    Authors:       Rudolf Brandner, Lawrence Conroy, Richard Stastny (for author       contact detail see [RFC4355])    Any other information the author deems interesting:       Note that MMS can be used as an alternative to deliver an SMS       RP-DATA RPDU if, for example, the SMS bearer is not supported.       If an entry includes this Enumservice, then in effect this can       be taken as implying that the recipient is capable of receiving       EMS or SMS messages at this address.  Such choices on the end       system design do have two small caveats; whilst in practice all       terminals supporting MMS today support SMS as well, it might       not necessarily be the case in the future, and there may be       tariff differences in using the MMS rather than using the SMS       or EMS. Enumservice Name: "mms"    Enumservice Type: "mms"    Enumservice Subtypes: "mailto"    URI Scheme: 'mailto:'    Functional Specification:       This Enumservice indicates that the resource identified by the       associated URI scheme is capable of receiving a message using       an email protocol.       MMS messages are sent over SMTP using the format specified by       TS 23.140 [15]section 8.4.4 and TS 26.140 [16]section 4.       Within and between MMS Environments (MMSE, network       infrastructures that support the MultiMedia Service), other       pieces of state data (for example, charging-significant       information) are exchanged between MMS Relay Servers.  Thus,       although these servers use SMTP as the "bearer" for their       application exchanges, they map their internal state to       specialised headers carried in the SMTP message exchanges.       The headers used in such MMSE are described in detail in [17].       For references see [RFC4355]Hoeneisen & Mayrhofer        Standards Track                   [Page 55]

RFC 6118         Update Legacy Enumservice Registrations      March 2011    Security Considerations:       There are no specific security issues with this Enumservice.       However, the general considerations ofSection 6 of [RFC4355]       apply.    Intended Usage: COMMON    Authors:       Rudolf Brandner, Lawrence Conroy, Richard Stastny (for author       contact detail see [RFC4355])    Any other information the author deems interesting:       The MMS Architecture describes an interface between the MMSE and       "legacy messaging systems" (labelled as MM3) which accepts       "standard" SMTP messages.  Thus although the MMS Relay Server       that supports this interface appears as a standard SMTP server       from the perspective of an Internet-based mail server, it acts       as a gateway and translator, adding the internal state data that       is used within and between the MMS Environments.  This mechanism       is described in [17], which also includes references to the       specifications agreed by those bodies responsible for the design       of the MMS. Service Name: E.164 to VPIM MailTo: URL    URI Type: "Mailto:"    Type: VPIM    Subtype: MAILTO    Functional Specification: Seesection 4.2 through 4.4 of [RFC4238]    Intended Usage: COMMON    Author: Greg Vaudreuil (gregv&ieee.org)    Error Conditions:       o E.164 number not in the numbering plan       o E.164 number in the numbering plan, but no URLs exist for that         number       o E2U+VPIM:Mailto Service unavailable    Security Considerations:       o Malicious Redirection         One of the fundamental dangers related to any service such as         this is that a malicious entry in a resolver's database will         cause clients to resolve the E.164 into the wrong email URL.         The possible intent may be to cause the client to send the         information to an incorrect destination.       o Denial of Service         By removing the URL to which the E.164 maps, a malicious         intruder may remove the client's ability to access the         resource.       o Unsolicited Bulk Email         The exposure of email addresses through the ENUM         service provides a bulk mailer access to large numbers         of email addresses where only the telephone number was         previously known.Hoeneisen & Mayrhofer        Standards Track                   [Page 56]

RFC 6118         Update Legacy Enumservice Registrations      March 2011 Service Name: E.164 to VPIM LDAP URL    URI Type: "LDAP:"    Type: VPIM    Subtype: LDAP    Functional Specification: Seesection 3.2 through 3.3 of [RFC4238]    Intended Usage: COMMON    Author: Greg Vaudreuil (gregv&ieee.org)    Security Considerations:       o Malicious Redirection         One of the fundamental dangers related to any service         such as this is that a malicious entry in a resolver's         database will cause clients to resolve the E.164 into         the wrong LDAP URL.  The possible intent may be to cause         the client to connect to a rogue LDAP server and         retrieve (or fail to retrieve) a resource containing         fraudulent or damaging information.       o Denial of Service         By removing the URL to which the E.164 maps, a         malicious intruder may remove the client's ability to         access the LDAP directory server. Enumservice Name: "voice"    Enumservice Type: "voice"    Enumservice Subtype: "tel"    URI Scheme: 'tel:'    Functional Specification:       The kind of communication indicated by this Enumservice is       "Interactive Voice".  From a protocol perspective, this       communication is expected to involve bidirectional media streams       carrying audio data.       A client may imply that the person controlling population of a       NAPTR holding this Enumservice indicates their capability to       engage in an interactive voice session when contacted using the       URI generated by this NAPTR.    Security Considerations:       SeeSection 5 of [RFC4415]    Intended Usage: COMMON    Authors:  Rudolf Brandner, Lawrence Conroy, Richard Stastny (for              author contact detail see Authors' Addresses section)    Any other information the author deems interesting:     o This Enumservice indicates that the person responsible for the       NAPTR is accessible via the PSTN (Public Switched Telephone       Network) or PLMN (Public Land Mobile Network) using the value of       the generated URI.     o The kind of subsystem required to initiate a Voice Enumservice       with this sub-type is a "Dialler".  This is a subsystem that       either provides a local connection to the PSTN or PLMN, or that       provides an indirect connection to those networks.  TheHoeneisen & Mayrhofer        Standards Track                   [Page 57]

RFC 6118         Update Legacy Enumservice Registrations      March 2011       subsystem will use the telephone number held in the generated       URI to place a voice call.  The voice call is placed to a       network that uses E.164 numbers to route calls to an appropriate       destination.     o Note that the PSTN/PLMN connection may be indirect.  The end       user receiving this NAPTR may have a relationship with a       Communications Service Provider that accepts call initiation       requests from that subsystem using an IP-based protocol such as       SIP or H.323, and places the call to the PSTN using a remote       gateway service.  In this case the Provider may either accept       requests using "tel:" URIs or has a defined mechanism to convert       "tel:" URI values into a "protocol-native" form.     o The "tel:" URI value SHOULD be fully qualified (using the       "global phone number" form ofRFC3966 [10]).  A "local phone       number" as defined in that document SHOULD NOT be used unless       the controller of the zone in which the NAPTR appears is sure       that it can be distinguished unambiguously by all clients that       can access the resource record and that a call from their       network access points can be routed to that destination. Enumservice Name: "pstn"    Enumservice Type: "pstn"    Enumservice Subtype: "tel"    URI Scheme: 'tel:'    Functional Specification:       These Enumservices indicate that the remote resource identified       can be addressed by the associated URI scheme in order to       initiate a telecommunication session, which may include two-way       voice or other communications, to the PSTN.  These URIs may       contain number portability data as specified inRFC 4694 [10].    Security Considerations: SeeSection 7 of [RFC4769].    Intended Usage: COMMON    Authors:       Jason Livingood (jason_livingood&cable.comcast.com)       Richard Shockey (richard.shockey&neustar.biz)    Any other information the author deems interesting:       A Number Portability Dip Indicator (npdi) should be used in       practice (see examples below inSection 4 of [RFC4769]).Hoeneisen & Mayrhofer        Standards Track                   [Page 58]

RFC 6118         Update Legacy Enumservice Registrations      March 2011 Enumservice Name: "pstn"    Enumservice Type: "pstn"    Enumservice Subtype: "sip"    URI Scheme: 'sip:'    Functional Specification:       These Enumservices indicate that the remote resource identified       can be addressed by the associated URI scheme in order to       initiate a telecommunication session, which may include two-way       voice or other communications, to the PSTN.    Security Considerations: SeeSection 7 of [RFC4769].    Intended Usage: COMMON    Authors:       Jason Livingood (jason_livingood&cable.comcast.com)       Richard Shockey (richard.shockey&neustar.biz)    Any other information the author deems interesting:       A Number Portability Dip Indicator (npdi) should be used in       practice (see examples below inSection 4 of [RFC4769]). Enumservice Name: "vCard"    Enumservice Name: "vCard"    Enumservice Type: "vcard"    Enumservice Subtype: n/a    URI Schemes: "http", "https"    Functional Specification:       This Enumservice indicates that the resource identified is a       plain vCard, according toRFC 2426, which may be accessed using       HTTP/ HTTPS [7].       Clients fetching the vCard from the resource indicated should       expect access to be restricted.  Additionally, the comprehension       of the data provided may vary depending on the client's       identity.    Security Considerations: seeSection 5 [RFC4969]    Intended Usage: COMMON    Author: Alexander Mayrhofer <alexander.mayrhofer&enum.at> Enumservice Name: "XMPP"    Enumservice Type: "xmpp"    Enumservice Subtype: n/a    URI Schemes: "xmpp"    Functional Specification:       This Enumservice indicates that the resource identified is an       XMPP entity.    Security Considerations: seeSection 6 of [RFC4979]    Intended Usage: COMMON    Author: Alexander Mayrhofer <alexander.mayrhofer&enum.at>Hoeneisen & Mayrhofer        Standards Track                   [Page 59]

RFC 6118         Update Legacy Enumservice Registrations      March 2011 Enumservice Name: "im"    Enumservice Type: "im"    Enumservice Subtypes: N/A    URI scheme(s): "im:"    Functional Specification:       This Enumservice indicates that the resource identified       is an 'im:' URI.  The 'im:' URI scheme does not identify       any particular protocol that will be used to handle       instant messaging receipt or delivery, rather the mechanism       inRFC 3861 [4] is used to discover whether an IM protocol       supported by the party querying ENUM is also supported by       the target resource.    Security considerations: Seesection 3 of [RFC5028]    Intended usage: COMMON    Author: Rohan Mahy (rohan&ekabal.com) Enumservice Name: "voicemsg"    Enumservice Type: "voicemsg"    Enumservice Subtypes: "sip"    URI Schemes: 'sip:'    Functional Specification:       This Enumservice indicates that the remote resource identified       can be addressed by the associated URI scheme in order to       initiate a voice communication session to a voice messaging       system.    Security Considerations: SeeSection 3 of [RFC5278]    Intended Usage: COMMON    Authors:       Jason Livingood (jason_livingood&cable.comcast.com)       Don Troshynski (dtroshynski&acmepacket.com)    Any other information the author deems interesting:       Implementers should review a non-exclusive list of examples       below inSection 7 of [RFC5278] Enumservice Name: "voicemsg"    Enumservice Type: "voicemsg"    Enumservice Subtypes: "sips"    URI Schemes: 'sips:'    Functional Specification:       This Enumservice indicates that the remote resource identified       can be addressed by the associated URI scheme in order to       initiate a voice communication session to a voice messaging       system.    Security Considerations: SeeSection 3 of [RFC5278]    Intended Usage: COMMON    Authors:       Jason Livingood (jason_livingood&cable.comcast.com)       Don Troshynski (dtroshynski&acmepacket.com)Hoeneisen & Mayrhofer        Standards Track                   [Page 60]

RFC 6118         Update Legacy Enumservice Registrations      March 2011    Any other information the author deems interesting:       Implementers should review a non-exclusive list of examples       below inSection 7 of [RFC5278] Enumservice Name: "voicemsg"    Enumservice Type: "voicemsg"    Enumservice Subtype: "tel"    URI Schemes: 'tel:'    Functional Specification:       This Enumservice indicates that the remote resource identified       can be addressed by the associated URI scheme in order to       initiate a voice communication session to a voice messaging       system.    Security Considerations: SeeSection 3 of [RFC5278]    Intended Usage: COMMON    Authors:       Jason Livingood (jason_livingood&cable.comcast.com)       Don Troshynski (dtroshynski&acmepacket.com)    Any other information the author deems interesting:       Implementers should review a non-exclusive list of examples       below inSection 7 of [RFC5278] Enumservice Name: "voicemsg"    Enumservice Type: "voicemsg"    Enumservice Subtype: "http"    URI Schemes: 'http:'    Functional Specification:       This Enumservice indicates that the remote resource identified       by the associated URI scheme is capable of being a source of       information.       Note that the kind of information retrieved can be manifold.       Usually, contacting a resource by an 'http:' [11] URI provides a       document.  This document can contain references that will trigger       the download of many different kinds of information, such as       text, audio, video, executable code, or even voice message       files.  Thus, one cannot be more specific about the kind of       information expected when contacting the resource.    Security Considerations: SeeSection 3 of [RFC5278]    Intended Usage: COMMON    Authors:       Jason Livingood (jason_livingood&cable.comcast.com)       Don Troshynski (dtroshynski&acmepacket.com)    Any other information the author deems interesting:       Implementers should review a non-exclusive list of examples       below inSection 7 of [RFC5278]Hoeneisen & Mayrhofer        Standards Track                   [Page 61]

RFC 6118         Update Legacy Enumservice Registrations      March 2011 Enumservice Name: "voicemsg"    Enumservice Type: "voicemsg"    Enumservice Subtype: "https"    URI Schemes: 'https:'    Functional Specification:       This Enumservice indicates that the remote resource identified       by the associated URI scheme is capable of being a source of       information, which can be contacted using TLS or the Secure       Socket Layer protocol.       Note that the kind of information retrieved can be manifold.       Usually, contacting a resource by an 'https:' [12] URI provides       a document.  This document can contain references that will       trigger the download of many different kinds of information,       such as text, audio, video, executable code, or even voice       message files.  Thus, one cannot be more specific about the kind       of information expected when contacting the resource.    Security Considerations: SeeSection 3 of [RFC5278]    Intended Usage: COMMON    Authors:       Jason Livingood (jason_livingood&cable.comcast.com)       Don Troshynski (dtroshynski&acmepacket.com)    Any other information the author deems interesting:       Implementers should review a non-exclusive list of examples       below inSection 7 of [RFC5278] Enumservice Name: "videomsg"    Enumservice Type: "videomsg"    Enumservice Subtypes: "sip"    URI Schemes: 'sip:'    Functional Specification:       This Enumservice indicates that the remote resource identified       can be addressed by the associated URI scheme in order to       initiate a video communication session to a video messaging       system.    Security Considerations: SeeSection 3 of [RFC5278]    Intended Usage: COMMON    Authors:       Jason Livingood (jason_livingood&cable.comcast.com)       Don Troshynski (dtroshynski&acmepacket.com)    Any other information the author deems interesting:       Implementers should review a non-exclusive list of examples       below inSection 7 of [RFC5278]Hoeneisen & Mayrhofer        Standards Track                   [Page 62]

RFC 6118         Update Legacy Enumservice Registrations      March 2011 Enumservice Name: "videomsg"    Enumservice Type: "videomsg"    Enumservice Subtypes: "sips"    URI Schemes: 'sips:'    Functional Specification:       This Enumservice indicates that the remote resource identified       can be addressed by the associated URI scheme in order to       initiate a video communication session to a video messaging       system.    Security Considerations: SeeSection 3 of [RFC5278]    Intended Usage: COMMON    Authors:       Jason Livingood (jason_livingood&cable.comcast.com)       Don Troshynski (dtroshynski&acmepacket.com)    Any other information the author deems interesting:       Implementers should review a non-exclusive list of examples       below inSection 7 of [RFC5278] Enumservice Name: "videomsg"    Enumservice Type: "videomsg"    Enumservice Subtype: "http"    URI Schemes: 'http:'    Functional Specification:       This Enumservice indicates that the remote resource identified       by the associated URI scheme is capable of being a source of       information.       Note that the kind of information retrieved can be manifold.       Usually, contacting a resource by an 'http:' [11] URI provides a       document.  This document can contain references that will trigger       the download of many different kinds of information, such as       text, audio, video, executable code, or even video message       files.  Thus, one cannot be more specific about the kind of       information expected when contacting the resource.    Security Considerations: SeeSection 3 of [RFC5278]    Intended Usage: COMMON    Authors:       Jason Livingood (jason_livingood&cable.comcast.com)       Don Troshynski (dtroshynski&acmepacket.com)    Any other information the author deems interesting:       Implementers should review a non-exclusive list of examples       below inSection 7 of [RFC5278]Hoeneisen & Mayrhofer        Standards Track                   [Page 63]

RFC 6118         Update Legacy Enumservice Registrations      March 2011 Enumservice Name: "videomsg"    Enumservice Type: "videomsg"    Enumservice Subtype: "https"    URI Schemes: 'https:'    Functional Specification:       This Enumservice indicates that the remote resource identified       by the associated URI scheme is capable of being a source of       information, which can be contacted using TLS or the Secure       Socket Layer protocol.       Note that the kind of information retrieved can be manifold.       Usually, contacting a resource by an 'https:' [12] URI provides       a document.  This document can contain references that will       trigger the download of many different kinds of information,       such as text, audio, video, executable code, or even video       message files.  Thus, one cannot be more specific about the kind       of information expected when contacting the resource.    Security Considerations: SeeSection 3 of [RFC5278]    Intended Usage: COMMON    Authors:       Jason Livingood (jason_livingood&cable.comcast.com)       Don Troshynski (dtroshynski&acmepacket.com)    Any other information the author deems interesting:       Implementers should review a non-exclusive list of examples       below inSection 7 of [RFC5278] Enumservice Name: "unifmsg"    Enumservice Type: "unifmsg"    Enumservice Subtypes: "sip"    URI Schemes: 'sip:'    Functional Specification:       This Enumservice indicates that the remote resource identified       can be addressed by the associated URI scheme in order to       initiate a unified communication session to a unified messaging       system.    Security Considerations: SeeSection 3 of [RFC5278]    Intended Usage: COMMON    Authors:       Jason Livingood (jason_livingood&cable.comcast.com)       Don Troshynski (dtroshynski&acmepacket.com)    Any other information the author deems interesting:       Implementers should review a non-exclusive list of examples       below inSection 7 of [RFC5278]Hoeneisen & Mayrhofer        Standards Track                   [Page 64]

RFC 6118         Update Legacy Enumservice Registrations      March 2011 Enumservice Name: "unifmsg"    Enumservice Type: "unifmsg"    Enumservice Subtypes: "sips"    URI Schemes: 'sips:'    Functional Specification:       This Enumservice indicates that the remote resource identified       can be addressed by the associated URI scheme in order to       initiate a unified communication session to a unified messaging       system.    Security Considerations: SeeSection 3 of [RFC5278]    Intended Usage: COMMON    Authors:       Jason Livingood (jason_livingood&cable.comcast.com)    Any other information the author deems interesting:       Implementers should review a non-exclusive list of examples       below inSection 7 of [RFC5278] Enumservice Name: "unifmsg"    Enumservice Type: "unifmsg"    Enumservice Subtype: "http"    URI Schemes: 'http:'    Functional Specification:       This Enumservice indicates that the remote resource identified       by the associated URI scheme is capable of being a source of       information.       Note that the kind of information retrieved can be manifold.       Usually, contacting a resource by an 'http:' [11] URI provides a       document.  This document can contain references that will trigger       the download of many different kinds of information, such as       text, audio, video, executable code, or even video message       files.  Thus, one cannot be more specific about the kind of       information expected when contacting the resource.    Security Considerations: SeeSection 3 of [RFC5278]    Intended Usage: COMMON    Authors:       Jason Livingood (jason_livingood&cable.comcast.com)       Don Troshynski (dtroshynski&acmepacket.com)    Any other information the author deems interesting:       Implementers should review a non-exclusive list of examples       below inSection 7 of [RFC5278]Hoeneisen & Mayrhofer        Standards Track                   [Page 65]

RFC 6118         Update Legacy Enumservice Registrations      March 2011 Enumservice Name: "unifmsg"    Enumservice Type: "unifmsg"    Enumservice Subtype: "https"    URI Schemes: 'https:'    Functional Specification:       This Enumservice indicates that the remote resource identified       by the associated URI scheme is capable of being a source of       information, which can be contacted using TLS or the Secure       Socket Layer protocol.       Note that the kind of information retrieved can be manifold.       Usually, contacting a resource by an 'https:' [12] URI provides       a document.  This document can contain references that will       trigger the download of many different kinds of information,       such as text, audio, video, executable code, or even video       message files.  Thus, one cannot be more specific about the kind       of information expected when contacting the resource.    Security Considerations: SeeSection 3 of [RFC5278]    Intended Usage: COMMON    Authors:       Jason Livingood (jason_livingood&cable.comcast.com)       Don Troshynski (dtroshynski&acmepacket.com)    Any other information the author deems interesting:       Implementers should review a non-exclusive list of examples       below inSection 7 of [RFC5278] Enumservice Name: "ical-sched"    Enumservice Type: "ical-sched"    Enumservice Subtypes: "mailto"    URI scheme(s): 'mailto:'    Functional Specification:       This Enumservice indicates that the resource identified can be       addressed by the associated URI used for scheduling using       Internet calendaring via Internet mail with the iMIP [6]       protocol.    Security considerations: SeeSection 4 of [RFC5333].    Intended usage: COMMON    Author:       Rohan Mahy (rohan&ekabal.com)Hoeneisen & Mayrhofer        Standards Track                   [Page 66]

RFC 6118         Update Legacy Enumservice Registrations      March 2011 Enumservice Name: "ical-access"    Enumservice Type: "ical-access"    Enumservice Subtypes: "http"    URI scheme(s): 'http:'    Functional Specification:       This Enumservice indicates that the resource identified can be       addressed by the associated URI in order to access a user's       calendar (for example free/busy status) using the CalDAV [7]       protocol for Internet calendaring.    Security considerations: SeeSection 4 of [RFC5333].    Intended usage: COMMON    Author:       Rohan Mahy (rohan&ekabal.com) Enumservice Name: "ical-access"    Enumservice Type: "ical-access"    Enumservice Subtypes: "https"    URI scheme(s): 'https:'    Functional Specification:       This Enumservice indicates that the resource identified can be       addressed by the associated URI in order to access a user's       calendar (for example free/busy status) using the CalDAV [7]       protocol for Internet calendaring.    Security considerations: SeeSection 4 of [RFC5333].    Intended usage: COMMON    Author:       Rohan Mahy (rohan&ekabal.com)Hoeneisen & Mayrhofer        Standards Track                   [Page 67]

RFC 6118         Update Legacy Enumservice Registrations      March 2011Authors' Addresses   Bernie Hoeneisen   Ucom Standards Track Solutions GmbH   CH-8000 Zuerich   Switzerland   Phone: +41 44 500 52 44   EMail: bernie@ietf.hoeneisen.ch (bernhard.hoeneisen AT ucom.ch)   URI:http://www.ucom.ch/   Alexander Mayrhofer   enum.at GmbH   Karlsplatz 1/9   Wien  A-1010   Austria   Phone: +43 1 5056416 34   EMail: alexander.mayrhofer@enum.at   URI:http://www.enum.at/Hoeneisen & Mayrhofer        Standards Track                   [Page 68]

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