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Versions: (draft-rosen-ecrit-additional-data) 00 01 02 03 04 05 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 RFC 7852

ECRIT                                                         B.R. Rosen
Internet-Draft                                                   NeuStar
Intended status: Standards Track                           H. Tschofenig
Expires: November 29, 2013                        Nokia Siemens Networks
                                                             R. Marshall
                                         TeleCommunication Systems, Inc.
                                                              R. Gellens
                                             Qualcomm Technologies, Inc.
                                                            May 28, 2013


              Additional Data related to an Emergency Call
                draft-ietf-ecrit-additional-data-09.txt

Abstract

   When an emergency call is sent to a Public Safety Answering Point
   (PSAP), the device that sends it, as well as any application service
   provider in the path of the call, or access network provider through
   which the call originated may have information about the call or the
   caller which the PSAP may be able to use.  This document describes
   data structures and a mechanism to convey such data to the PSAP.  The
   mechanism uses a Uniform Resource Identifier (URI), which may point
   to either an external resource or an object in the body of the SIP
   message.  The mechanism thus allows the data to be passed by
   reference (when the URI points to an external resource) or by value
   (when it points into the body of the message).  This follows the
   tradition of prior emergency services standardization work where data
   can be conveyed by value within the call signaling (i.e., in body of
   the SIP message) and also by reference.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on November 29, 2013.




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Copyright Notice

   Copyright (c) 2013 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   4
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   5
   3.  Data Structures . . . . . . . . . . . . . . . . . . . . . . .   6
     3.1.  Data Provider Information . . . . . . . . . . . . . . . .   7
       3.1.1.  Data Provider String  . . . . . . . . . . . . . . . .   7
       3.1.2.  Data Provider ID  . . . . . . . . . . . . . . . . . .   7
       3.1.3.  Data Provider ID Series . . . . . . . . . . . . . . .   8
       3.1.4.  Type of Data Provider . . . . . . . . . . . . . . . .   8
       3.1.5.  Data Provider Contact URI . . . . . . . . . . . . . .   9
       3.1.6.  Data Provider Languages(s) Supported  . . . . . . . .  10
       3.1.7.  xCard of Data Provider  . . . . . . . . . . . . . . .  10
       3.1.8.  Subcontractor Principal . . . . . . . . . . . . . . .  11
       3.1.9.  Subcontractor Priority  . . . . . . . . . . . . . . .  12
       3.1.10. emergencyCall.ProviderInfo Example  . . . . . . . . .  12
     3.2.  Service Information . . . . . . . . . . . . . . . . . . .  14
       3.2.1.  Service Environment . . . . . . . . . . . . . . . . .  14
       3.2.2.  Service Delivered by Provider to End User . . . . . .  15
       3.2.3.  Service Mobility Environment  . . . . . . . . . . . .  16
       3.2.4.  emergencyCall.SvcInfo Example . . . . . . . . . . . .  17
     3.3.  Device Information  . . . . . . . . . . . . . . . . . . .  17
       3.3.1.  Device Classification . . . . . . . . . . . . . . . .  18
       3.3.2.  Device Manufacturer . . . . . . . . . . . . . . . . .  19
       3.3.3.  Device Model Number . . . . . . . . . . . . . . . . .  20
       3.3.4.  Unique Device Identifier  . . . . . . . . . . . . . .  20
       3.3.5.  Type of Device Identifier . . . . . . . . . . . . . .  21
       3.3.6.  Device/Service Specific Additional Data Structure . .  21
       3.3.7.  Device/Service Specific Additional Data Structure
               Type  . . . . . . . . . . . . . . . . . . . . . . . .  22
       3.3.8.  Choosing between defining a new type of block or new
               type of device/service specific additional data . . .  23
       3.3.9.  emergencyCall.DevInfo Example . . . . . . . . . . . .  23



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     3.4.  Owner/Subscriber Information  . . . . . . . . . . . . . .  24
       3.4.1.  xCard for Subscriber's Data . . . . . . . . . . . . .  24
       3.4.2.  emergencyCall.SubInfo Example . . . . . . . . . . . .  24
     3.5.  Comment . . . . . . . . . . . . . . . . . . . . . . . . .  27
       3.5.1.  Comment . . . . . . . . . . . . . . . . . . . . . . .  27
       3.5.2.  emergencyCall.Comment Example . . . . . . . . . . . .  27
   4.  Transport . . . . . . . . . . . . . . . . . . . . . . . . . .  27
     4.1.  Transmitting Blocks using the Call-Info Header  . . . . .  29
     4.2.  Transmitting Blocks by Reference using the Provided-By
           Element . . . . . . . . . . . . . . . . . . . . . . . . .  30
     4.3.  Transmitting Blocks by Value using the Provided-By
           Element . . . . . . . . . . . . . . . . . . . . . . . . .  31
   5.  Examples  . . . . . . . . . . . . . . . . . . . . . . . . . .  31
   6.  XML Schemas . . . . . . . . . . . . . . . . . . . . . . . . .  33
     6.1.  emergencyCall.ProviderInfo XML Schema . . . . . . . . . .  33
     6.2.  emergencyCall.SvcInfo XML Schema  . . . . . . . . . . . .  34
     6.3.  emergencyCall.DevInfo XML Schema  . . . . . . . . . . . .  35
     6.4.  emergencyCall.SubInfo XML Schema  . . . . . . . . . . . .  36
     6.5.  emergencyCall.Comment XML Schema  . . . . . . . . . . . .  37
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  37
   8.  Privacy Considerations  . . . . . . . . . . . . . . . . . . .  39
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  39
     9.1.  Registry creation . . . . . . . . . . . . . . . . . . . .  39
       9.1.1.  Additional Call Data Provider ID Series Registry  . .  39
       9.1.2.  Additional Call Data Service Provider Type Registry .  40
       9.1.3.  Additional Call Data Service Delivered Registry . . .  40
       9.1.4.  Additional Call Data Device Classification Registry .  40
       9.1.5.  Additional Call Data Device ID Type Type Registry . .  41
       9.1.6.  Device/Service Specific Additional Data Type Registry  41
       9.1.7.  Additional Call Data Blocks Registry  . . . . . . . .  42
     9.2.  'emergencyCallData' Purpose Parameter Value . . . . . . .  42
     9.3.  URN Sub-Namespace Registration for provided-by Registry
           Entry . . . . . . . . . . . . . . . . . . . . . . . . . .  43
       9.3.1.  Provided-By XML Schema  . . . . . . . . . . . . . . .  43
     9.4.  MIME Registrations  . . . . . . . . . . . . . . . . . . .  44
       9.4.1.  MIME Content-type Registration for
               'application/emergencyCall.ProviderInfo+xml'  . . . .  45
       9.4.2.  MIME Content-type Registration for
               'application/emergencyCall.SvcInfo+xml' . . . . . . .  46
       9.4.3.  MIME Content-type Registration for
               'application/emergencyCall.DevInfo+xml' . . . . . . .  47
       9.4.4.  MIME Content-type Registration for
               'application/emergencyCall.SubInfo+xml' . . . . . . .  48
       9.4.5.  MIME Content-type Registration for
               'application/emergencyCall.Comment+xml' . . . . . . .  50
     9.5.  URN Sub-Namespace Registration  . . . . . . . . . . . . .  51
       9.5.1.  Registration for
               urn:ietf:params:xml:ns:emergencyCallAddlData  . . . .  51



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       9.5.2.  Registration for
               urn:ietf:params:xml:ns:emergencyCallProviderInfo  . .  51
       9.5.3.  Registration for
               urn:ietf:params:xml:ns:emergencyCall.SvcInfo  . . . .  52
       9.5.4.  Registration for
               urn:ietf:params:xml:ns:emergencyCall.DevInfo  . . . .  53
       9.5.5.  Registration for
               urn:ietf:params:xml:ns:emergencyCall.SubInfo  . . . .  54
       9.5.6.  Registration for
               urn:ietf:params:xml:ns:emergencyCall.Comment  . . . .  54
     9.6.  Schema Registrations  . . . . . . . . . . . . . . . . . .  55
     9.7.  VCard Parameter Value Registration  . . . . . . . . . . .  56
   10. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  56
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  57
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  57
     11.2.  Informational References . . . . . . . . . . . . . . . .  57
   Appendix A.  XML Schema for vCard/xCard . . . . . . . . . . . . .  58
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  80

1.  Introduction

   When an IP-based emergency call is initiated a rich set of data from
   multiple data sources is conveyed to the Public Safety Answering
   Point (PSAP).  This data includes information about the calling party
   identity, the multimedia capabilities of the device, the emergency
   service number, location information, and meta-data about the
   sources.  The device, the access network provider, and any service
   provider in the call path may have even more information that may be
   useful for a PSAP call taker.  This document extends the basic set of
   data communicated with an IP-based emergency call providing call
   takers and the PSAP organization valuable insight and increased
   situational awareness.

   In general, there are three categories of data communicated in an
   emergency call:

   Data Associated with a Location:  Location data is conveyed in the
      Presence Information Data Format Location Object (PIDF-LO) data
      structure originally defined in RFC 4119 [RFC4119].  There may be
      data that is specific to the location not available in the
      location data structure itself, such as floor plans, tenant and
      building owner contact data, heating, ventilation and air
      conditioning (HVAC) status, etc.

   Data Associated with a Call:  While information is carried in the
      call setup procedure itself (as part of the SIP headers as well as
      in the body of the SIP message), there is additional data known by
      the device making the call, or a service provider in the path of



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      the call.  This information may include the service provider
      contact information, subscriber identity and contact information,
      the type of service the service provider and access network
      provider offer, what kind of device is being used, etc.  Some data
      is device or service dependent data.  For example, a car
      telematics system may have crash information.  A medical
      monitoring device may have sensor data.

   Data Associated with a Caller:  This is personal data about a caller,
      such as medical information and emergency contact data.

   This document only defines data structures relevant to data
   associated with the call.  Other forms of additional data may use
   this mechanism to carry data, but those blocks are not defined in
   this document.

   For interoperability, there needs to be a common way for the
   information conveyed to a PSAP to be encoded and identified.
   Identification allows emergency services authorities to know during
   call processing which types of data are present and to determine if
   they wish to access it.  A common encoding allows the data to be
   accessed.  This document defines the data structures and a way to
   communicate the information in several ways.  Although current
   standization efforts around IP-based emergency services are focused
   on the Session Initiation Protocol (SIP) and HTTP the data structures
   in XML format described in this document are usable for other
   communication systems as well.  In Section 3 the data structures are
   defined and the SIP/HTTP transport components are defined in
   Section 4 to offer a clear separation between the two.

   More technically, the data structure described in this document is
   represented as one or more "blocks" of information.  Each of the
   blocks is an XML structure with an associated Multipurpose Internet
   Mail Extensions (MIME) type for encapsulation, and an extensible set
   of these types constitute the data set.  A registry is defined to
   list the block types that may be included.

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 in RFC 2119 [RFC2119].

   This document also uses terminology from [RFC5012].  We use the term
   service provider to refer to an Application Service Provider (ASP) or
   to Voice Service Provider (VSP), which is a specific type of ASP.
   With the term "Access Network Provider" we refer to the Internet
   Access Provider (IAP) and the Internet Service Provider (ISP) without



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   further distinguishing these two entities, since the difference
   between the two is not relevant for this document.  Note that the
   roles of ASP and access network provider may be provided by a single
   company.

   In the data block definitions, see Section 3, the values for the
   "Use:" label are specified as one of:

   'Required':  means they must be present in the data structure.

   'Conditional':  means they must be present unless the specified
      condition is met, in which case the they may be present.

   'Optional':  means they may be present.

3.  Data Structures

   This section defines the following five data structures, each as a
   data block.  For each block we define the MIME type, and the XML data
   structure

   'Data Provider':  This block supplies name and contact information
      for the entity that created the data.  Section 3.1 provides the
      details.

   'Service Information':  This block supplies information about the
      service.  The description can be found in Section 3.2.

   'Device Information':  This block supplies information about the
      device placing the call.  Device information can be found in
      Section 3.3.

   'Owner/Subscriber':  This block supplies information about the owner
      of the device or about the subscriber.  Details can be found in
      Section 3.4.

   'Comment':  This block provides a way to supply free form human
      readable text to the PSAP or emergency responders.  This simple
      structure is defined in Section 3.5.

   Note that the xCard format is re-used in some of the data structures
   to provide contact information.  In a xCard there is no way to
   specify a "main" telephone number.  These numbers are useful to
   emergency responders who are called to a large enterprise.  This
   document adds a new property value to the "tel" property of the TYPE
   parameter called "main".  It can be used in any xCard in additional
   data.




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3.1.  Data Provider Information

   This block is intended to be provided by any service provider in the
   path of the call or the access network provider.  It includes
   identification and contact information.  This block SHOULD be
   provided by every service provider in the call path, and by the
   access network provider.  Devices MAY use this block to provide
   identifying information.  The MIME subtype is "application/
   emergencyCall.ProviderInfo+xml".

3.1.1.  Data Provider String

   Data Element:  Data Provider String


   Use:  Required


   XML Element:  <DataProviderString>


   Description:  This is a plain language string suitable for displaying
      the name of the service provider that created the additional data
      structure.  If the device created the structure the value is
      identical to the contact header in the SIP INVITE.


   Reason for Need:  Inform the call taker of the identity of the entity
      providing the additional call data structure.

   How Used by Call Taker:  Allows the call taker to interpret the data
      in this structure.  The source of the information often influences
      how the information is used, believed or verified.

3.1.2.  Data Provider ID

   Data Element:  Data Provider ID


   Use:  Conditional.  Must be provided if the service provider is
      located in a jurisdiction that maintains such ids.  Devices are
      not required to provide it.


   XML Element:  <ProviderID>






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   Description:  A jurisdiction specific code for the provider shown in
      the <DataProvidedBy> element that created the structure of the
      call.  This data SHOULD be provided if the local jurisdiction
      maintains such an ID list.  For example, in North America, this
      would be a "NENA Company ID".  Devices SHOULD NOT use this
      element.


   Reason for Need:  Inform the call taker of the identity of the entity
      providing the additional call data structure.


   How Used by Call Taker:  Where jurisdictions have lists of providers
      the Data Provider ID can be useful.

3.1.3.  Data Provider ID Series

   Data Element:  Data Provider ID Series


   Use:  Conditional.  If Data Provider ID is provided, Data Provider ID
      Series is required.


   XML Element:  <ProviderIDSeries>


   Description:  Identifies the issuer of the the ProviderId.  A
      registry will reflect the following valid entries:

      *  NENA

      *  EENA


   Reason for Need:  Identifies how to interpret the Data Provider ID.


   How Used by Call Taker:  Determines which provider ID registry to
      consult for more information

3.1.4.  Type of Data Provider

   Data Element:  Type of Data Provider ID


   Use:  Conditional.  If Data Provider ID is provided, Type of Data
      Provider ID is required.



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   XML Element:  <TypeOfProviderID>


   Description:  Identifies the type of data provider id being supplied
      in the ProviderId data element.  A registry with an initial set of
      values is shown in the table below.

   +------------------------------+------------------------------------+
   | Token                        | Description                        |
   +------------------------------+------------------------------------+
   |Access Network Provider       | Access network service provider    |
   |Service Provider              | Calling or Origination telecom SP  |
   |Service Provider Subcontractor| A contractor to another kind of SP |
   |Telematics Provider           | A sensor based SP, especially      |
   |                              | vehicle based                      |
   |Language Translation Provider | A spoken language translation SP   |
   |Expert Advice Provider        | An SP giving expert advice         |
   |Emergency Modality Translation| An emergency call specific         |
   |                              | modality translation service       |
   |                              | e.g. for sign language             |
   |Relay Provider                | A interpretation SP, for example,  |
   |                              | video relay for sign language      |
   |                              | interpreting                       |
   |Other                         | Any other type of service provider |
   +------------------------------+------------------------------------+

                Figure 1: Type of Data Provider ID Registry


   Reason for Need:  Identifies what kind of data provider this is.


   How Used by Call Taker:  To decide who to contact when further
      information is needed

3.1.5.  Data Provider Contact URI

   Data Element:  Data Provider Contact URI


   Use:  Required


   XML Element:  <ContactURI>


   Description:  For a service provider the contact SHOULD be a contact
      URI.  This MUST be a SIP URI.  If a telephone number is the



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      contact address it should be provided in the form of
      sip:telephonenumber@serviceprovider:user=phone.  If the call is
      from a device, this would reflect the contact information of the
      owner of the device.  When provided by a service provider, this
      would be a URI to a 24/7 support organization tasked to provide
      PSAP support for this emergency call.


   Reason for Need:  Additional data providers may need to be contacted
      for error or other unusual circumstances.


   How Used by Call Taker:  To contact the supplier of the additional
      data for assistance in handling the call.

3.1.6.  Data Provider Languages(s) Supported

   Data Element:  Data Provider Language(s) supported


   Use:  Conditional


   XML Element:  <Language>


   Description:  The language used by the entity at the Data Provider
      Contact URI as an alpha 2-character code as defined in ISO
      639-1:2002 Codes for the representation of names of languages --
      Part 1: Alpha-2 code Multiple instances of this element may occur.
      Order is significant; preferred language should appear first.
      This data is required if a Data Provider Contact URI is provided.
      The content must reflect the languages supported at the contact
      URI.


   Reason for Need:  Information needed to determine if emergency
      service authority can communicate with the service provider or if
      an interpreter will be needed.


   How Used by Call Taker:  If call taker cannot speak language(s)
      supported by the service provider, a translation service will need
      to be added to the conversation.

3.1.7.  xCard of Data Provider

   Data Element:  xCard of Data Provider



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   Use:  Optional


   XML Element:  <DataProviderContact>


   Description:  There are many fields in the xCARD and the creator of
      the data structure is encouraged to provide as much information as
      they have available.  N, ORG, ADR, TEL, EMAIL are suggested at a
      minimum.  N should contain name of support group or device owner
      as appropriate.  If more than one TEL property is provided, a
      parameter from the vCard Property Value registry MUST be specified
      on each TEL.  For encoding of the xCard this specification uses
      the XML-based encoding specified in [RFC6351].

      and is hereinafter referred to as "xCard"

   Reason for Need:  Information needed to determine additional contact
      information.


   How Used by Call Taker:  Assists call taker by providing additional
      contact information that may not be included in the SIP invite or
      the PIDF-LO.

3.1.8.  Subcontractor Principal

   Data Element:  Subcontractor Principal


   XML Element:  <SubcontratorPrincipal>


   Description:  If the data provider is a subcontractor to another
      provider such as an access infrastructure provider or telematics
      provider, this element contains the DataProviderString of the
      service provider to indicate which provider the subcontractor is
      working for.  This data is required if the Data Provider type is
      subcontractor.


   Reason for Need:  Identify the entity the subcontractor works for.

   How Used by Call Taker:  Allows the call taker to understand what the
      relationship between data providers and the service providers in
      the path of the call are.





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3.1.9.  Subcontractor Priority

   Data Element:  Subcontractor Priority


   Use:  Required


   XML Element:  <SubcontractorPriority>


   Description:  If the subcontractor should be contacted first, this
      element should have a "sub" value.  If the access or origination
      service provider should be contacted first, this element should
      have a "main" value.  This data is required if the Data Provider
      type is "subcontractor".


   Reason for Need:  Inform the call taker whether the network operator
      or the subcontractor should be contacted first if support is
      needed.

   How Used by Call Taker:  To decide which entity to contact first if
      assistance is needed.

3.1.10.  emergencyCall.ProviderInfo Example


   <?xml version="1.0" encoding="UTF-8"?>
   <ad:emergencyCall.ProviderInfo
       xmlns:ad="urn:ietf:params:xml:ns:emergencyCall.ProviderInfo"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
       <ad:DataProviderString>Example VoIP Provider
       </ad:DataProviderString>
       <ad:ProviderID>ID123</ad:ProviderID>
       <ad:ProviderIDSeries>NENA</ad:ProviderIDSeries>
       <ad:TypeOfProvider>Service Provider</ad:TypeOfProvider>
       <ad:ContactURI>sip:voip-provider@example.com</ad:ContactURI>
       <ad:Language>EN</ad:Language>
       <xc:DataProviderContact
           xmlns:xc="urn:ietf:params:xml:ns:vcard-4.0">
                   <vcard>
                       <fn><text>Hannes Tschofenig</text></fn>
                       <n>
                           <surname>Hannes</surname>
                           <given>Tschofenig</given>
                           <additional/>
                           <prefix/>



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                           <suffix>Dipl. Ing.</suffix>
                       </n>
                       <bday><date>--0203</date></bday>
                       <anniversary>
                           <date-time>20090808T1430-0500</date-time>
                       </anniversary>
                       <gender><sex>M</sex></gender>
                       <lang>
                           <parameters><pref><integer>1</integer></pref>
                           </parameters>
                           <language-tag>de</language-tag>
                       </lang>
                       <lang>
                           <parameters><pref><integer>2</integer></pref>
                           </parameters>
                           <language-tag>en</language-tag>
                       </lang>
                       <org>
                           <parameters><type><text>work</text></type>
                           </parameters>
                           <text>Example VoIP Provider</text>
                       </org>
                       <adr>
                           <parameters>
                               <type><text>work</text></type>
                               <label><text>Hannes Tschofenig
                                   Linnoitustie 6
                                   Espoo , Finland
                                   02600</text></label>
                           </parameters>
                           <pobox/>
                           <ext/>
                           <street>Linnoitustie 6</street>
                           <locality>Espoo</locality>
                           <region>Uusimaa</region>
                           <code>02600</code>
                           <country>Finland</country>
                       </adr>
                       <tel>
                           <parameters>
                               <type>
                                   <text>work</text>
                                   <text>voice</text>
                               </type>
                           </parameters>
                           <uri>tel:+358 50 4871445</uri>
                       </tel>
                       <email>



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                           <parameters><type><text>work</text></type>
                           </parameters>
                           <text>hannes.tschofenig@nsn.com</text>
                       </email>
                       <geo>
                           <parameters><type><text>work</text></type>
                           </parameters>
                           <uri>geo:60.210796,24.812924</uri>
                       </geo>
                       <key>
                           <parameters><type><text>home</text></type>
                           </parameters>
                           <uri>
                           http://www.tschofenig.priv.at/key.asc
                           </uri>
                       </key>
                       <tz><text>Finland/Helsinki</text></tz>
                       <url>
                           <parameters><type><text>home</text></type>
                           </parameters>
                           <uri>http://www.tschofenig.priv.at</uri>
                       </url>
                   </vcard>
       </xc:DataProviderContact>
   </ad:emergencyCall.ProviderInfo>

               Figure 2: emergencyCall.ProviderInfo Example

3.2.  Service Information

   This block describes the service that the service provider provides
   to the caller.  It SHOULD be included by all SPs in the path of the
   call.  The mime subtype is "application/emergencyCall.SvcInfo+xml".

3.2.1.  Service Environment

   Data Element:  Service Environment


   Use:  Required


   XML Element:  <SvcEnvironment>


   Description:  This element defines whether a call is from a business
      or residence caller.  Currently, the only valid entries are
      'Business' or 'Residence'.



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   Reason for Need:  To assist in determining equipment and manpower
      requirements.


   How Used by Call Taker:  Information may be used to assist in
      determining equipment and manpower requirements for emergency
      responders.  As the information is not always available, and the
      registry is not all encompassing, this is at best advisory
      information, but since it mimics a similar capability in some
      current emergency calling systems, it is known to be valuable.
      The service provider uses its best information (such as a rate
      plan, facilities used to deliver service or service description)
      to determine the information and is not responsible for
      determining the actual characteristics of the location where the
      call originates from.

3.2.2.  Service Delivered by Provider to End User

   Data Element:  Service Delivered by Provider to End User


   Use:  Required


   XML Element:  <SvcDelByProvider>


   Description:  This defines the type of service the end user has
      subscribed to.  The implied mobility of this service can not be
      relied upon.  A registry with a initial set of values is defined
      in the table below.

   +--------+----------------------------------------+
   | Name   | Description                            |
   +--------+----------------------------------------+
   | Wrless | Wireless Telephone Service: Includes   |
   |        |   Satellite, CDMA, GSM, Wi-Fi, WiMAX,  |
   |        |   LTE (Long Term Evolution)            |
   | Coin   | Fixed Public Pay/Coin telephones: Any  |
   |        |   coin or credit card operated device  |
   | 1way   | One way outbound service               |
   | Prison | Inmate call/service                    |
   | Temp   | Soft dialtone/quick service/warm       |
   |        |   disconnect/suspended                 |
   | MLTS   | Multi-line telephone system: Includes  |
   |        |   all PBX, Centrex, key systems,       |
   |        |   Shared Tenant Service                |
   | SenseU | Sensor, unattended: Includes devices   |



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   |        |   that generate DATA ONLY. This is     |
   |        |   one-way information exchange and     |
   |        |   there will be no other form of       |
   |        |   communication                        |
   | SenseA | Sensor, attended: Includes devices     |
   |        |   that are supported by a monitoring   |
   |        |   service provider or automatically    |
   |        |   open a two-way communication path    |
   | POTS   | Wireline: Plain Old Telephone Service  |
   | VOIP   | VoIP Telephone Service: A type of      |
   |        |   service that offers communication    |
   |        |   over internet protocol, such as Fixed|
   |        |   Nomadic, Mobile, ...                 |
   | Remote | Off premise extension                  |
   | Relay  | Relay Service: a type of service where |
   |        |   there is a human 3rd party agent who |
   |        |   provides some kind of additional     |
   |        |   assistance to the caller.  Includes  |
   |        |   sign language relay and telematics   |
   |        |   services which provide a service     |
   |        |   assistant on the call.               |
   +--------+----------------------------------------+

       Figure 3: Service Delivered by Provider to End User Registry

      More than one value MAY be returned.  For example, a VoIP inmate
      telephone service is a reasonable combination.


   Reason for Need:  Knowing the type of service may assist the PSAP
      with the handling of the call.


   How Used by Call Taker:  Call takers often use this information to
      determine what kinds of questions to ask callers, and how much to
      rely on supportive information.  An emergency call from a prison
      is treated differently that a call from a sensor device.  As the
      information is not always available, and the registry is not all
      encompassing, this is at best advisory information, but since it
      mimics a similar capability in some current emergency calling
      systems, it is known to be valuable.

3.2.3.  Service Mobility Environment

   Data Element:  Service Mobility Environment


   Use:  Required



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   XML Element:  <SvcMobility>


   Description:  This provides the service providers view of the
      mobility of the caller.  As the service provider may not know the
      characteristics of the actual access network used, the value not
      be relied upon.  A registry will reflect the following initial
      valid entries:

      *  Mobile: the device should be able to move at any time

      *  Fixed: the device is not expected to move unless the service is
         relocated

      *  Nomadic: the device is not expected to change its point of
         attachment while on a call

      *  Unknown: no information is known about the service mobility
         environment for the device


   Reason for Need:  Knowing the service provider's belief of mobility
      may assist the PSAP with the handling of the call.


   How Used by Call Taker:  To determine whether to assume the location
      of the caller might change.

3.2.4.  emergencyCall.SvcInfo Example


   <?xml version="1.0" encoding="UTF-8"?>
   <svc:emergencyCall.SvcInfo
        xmlns:svc="urn:ietf:params:xml:ns:emergencyCall.SvcInfo"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
       <svc:SvcEnvironment>Business</svc:SvcEnvironment>
       <svc:SvcDelByProvider>MLTS</svc:SvcDelByProvider>
       <svc:SvcMobility>Fixed</svc:SvcMobility>
   </svc:emergencyCall.SvcInfo>

                  Figure 4: emergencyCall.SvcInfo Example

3.3.  Device Information

   This block provides information about the device used to place the
   call.  It should be provided by any service provider that knows what
   device is being used, and by the device itself.  The mime subtype is
   "application/emergencyCall.DevInfo+xml".



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3.3.1.  Device Classification

   Data Element:  Device Classification


   Use:  Optional


   XML Element:  <DeviceClassification>


   Description:  This data element defines the kind of device making the
      emergency call.  If the device provides the data structure, the
      device information SHOULD be provided.  If the service provider
      provides the structure and it knows what the device is, the
      service provider SHOULD provide the device information.  Often the
      carrier does not know what the device is.  It is possible to
      receive two Additional Data Associated with a Call data
      structures, one created by the device and one created by the
      service provider.  This information describes the device, not how
      it is being used.  This data element defines the kind of device
      making the emergency call.  The registry with the initial set of
      values is shown below.

   +--------+----------------------------------------+
   | Token  | Description                            |
   +--------+----------------------------------------+
   |Cordless| Cordless handset                       |
   | Fixed  | Fixed phone                            |
   | Mobile | Mobile handset                         |
   | ATA    | analog terminal adapter                |
   |Satphone| Satellite phone                        |
   | FSense | Stationary computing device (alarm     |
   |        |   system, data sensor)                 |
   | Guard  | Guardian devices                       |
   | Desktop| Desktop PC                             |
   | Laptop | Laptop computing device                |
   | Tablet | Tablet computing device                |
   | Alarm  | Alarm system                           |
   | MSense | Mobile Data sensor                     |
   | Beacon | Personal beacons (spot)                |
   | Auto   | Auto telematics                        |
   | Truck  | Truck telematics                       |
   | Farm   | Farm equipment telematics              |
   | Marine | Marine telematics                      |
   | PDA    | Personal digital assistant             |
   | PND    | Personal navigation device)            |
   | SmrtPhn| Smart phone                            |



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   | Itab   | Internet tablet                        |
   | Game   | Gaming console                         |
   | Video  | Video phone                            |
   | Text   | Other text device                      |
   | NA     | Not Available                          |
   +--------+----------------------------------------+

                 Figure 5: Device Classification Registry


   Reason for Need:  The device classification implies the capability of
      the calling device and assists in identifying the meaning of the
      emergency call location information that is being presented.  For
      example, does the device require human intervention to initiate a
      call or is this call the result of programmed instructions?  Does
      the calling device have the ability to update location or
      condition changes?  Is this device interactive or a one-way
      reporting device?


   How Used by Call Taker:  May assist with location of caller.  For
      example, a cordless handset may be outside or next door.  May
      provide calltaker some context about the caller, the capabilities
      of the device used for the call or the environment the device is
      being used in.

3.3.2.  Device Manufacturer

   Data Element:  Device Manufacturer


   Use:  Optional


   XML Element:  <DeviceMfgr>


   Description:  The plain language name of the manufacturer of the
      device.


   Reason for Need:  Used by PSAP management for post-mortem
      investigation/resolution.


   How Used by Call Taker:  Probably not used by calltaker, but by PSAP
      management.




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3.3.3.  Device Model Number

   Data Element:  Device Model Number


   Use:  Optional


   XML Element:  <DeviceModelNr>


   Description:  Model number of the device.


   Reason for Need:  Used by PSAP management for after action
      investigation/resolution.


   How Used by Call Taker:  Probably not used by calltaker, but by PSAP
      management.

3.3.4.  Unique Device Identifier

   Data Element:  Unique Device Identifier


   Use:  Optional


   XML Element:  <UniqueDeviceID>


   Description:  String that identifies the specific device making the
      call or creating an event.


   Reason for Need:  Uniquely identifies the device as opposed to any
      signaling identifiers encountered in the call signaling stream.


   How Used by Call Taker:  Probably not used by calltaker they would
      need to refer to management for investigation.









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3.3.5.  Type of Device Identifier

   Data Element:  Type of Device Identifier


   Use:  Conditional: must be provided if DeviceID is provided


   XML Element:  <TypeOfDeviceID>


   Description:  Identifies the type of device identifier being
      generated in the unique device identifier data element.  A
      registry with an initial set of values can be seen below:

   +--------+----------------------------------------+
   | Token  | Description                            |
   +--------+----------------------------------------+
   | MEID   | Mobile Equipment Identifier  (CDMA)    |
   | ESN    | Electronic Serial Number(GSM)          |
   | MAC    | Media Access Control Address (IEEE)    |
   | WiMAX  | Device Certificate Unique ID           |
   | IMEI   | International Mobile Equipment ID (GSM)|
   | UDI    | Unique Device Identifier               |
   | RFID   | Radio Frequency Identification         |
   | SN     | Manufacturer Serial Number             |
   +--------+----------------------------------------+

              Figure 6: Registry with Device Identifier Types


   Reason for Need:  Identifies how to interpret the Unique Device
      Identifier.


   How Used by Call Taker:  Additional information that may be used to
      assist with call handling.

3.3.6.  Device/Service Specific Additional Data Structure

   Data Element:  Device/service specific additional data structure


   Use:  Optional


   XML Element:  <DeviceSpecificData>




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   Description:  A URI representing additional data whose schema is
      specific to the device or service which created it.  An example is
      the VEDs structure for a vehicle telematics device.  The URI, when
      dereferenced, MUST yield a data structure defined by the Device/
      service specific additional data type value.  Different data may
      be created by each classification; e.g., telematics creates VEDS
      data set.


   Reason for Need:  Provides device/service specific data that may be
      used by the call taker and/or responders.


   How Used by Call Taker:  Provide information to guide call takers to
      select appropriate responders, give appropriate pre-arrival
      instructions to callers, and advise responders of what to be
      prepared for.  May be used by responders to guide assistance
      provided.

3.3.7.  Device/Service Specific Additional Data Structure Type

   Data Element:  Type of Device/service specific additional data
      structure


   Use:  Conditional.  MUST be provided when Device/service specific
      additional URI is provided


   XML Element:  <DeviceSpecificType>


   Description:  Value from a registry defined by this document to
      describe the type of data that can be retrieved from the Device/
      service specific additional data structure.  Initial values are:

      *  IEEE 1512 - USDOT Model for traffic incidents

      *  VEDS


   Reason for Need:  This data element allows identification of
      externally defined schemas, which may have additional data that
      may assist in emergency response.


   How Used by Call Taker:  This data element allows the end user
      (calltaker or first responder) to know what type of additional



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      data may be available to aid in providing the needed emergency
      services.


   Note:  Information which is specific to a location or a caller
      (person) should not be placed in this section.

3.3.8.  Choosing between defining a new type of block or new type of
        device/service specific additional data

   For devices that have device or service specific data, there are two
   choices to carry it.  A new block can be defined, or the device/
   service specific additional data URL the the DevInfo block can be
   used and a new type for it defined .  The data passed would likely be
   the same in both cases.  Considerations for choosing which mechanism
   to register under include:

   Applicability:  Information which will be carried by many kinds of
      devices or services are more appropriately defined as separate
      blocks.

   Privacy:  Information which may contain private data may be better
      sent in the DevInfo block, rather than a new block so that
      implementations are not tempted to send the data by value, and
      thus having more exposure to the data than forcing the data to be
      retrieved via the URL in DevInfo.

   Size:  Information which may be very may be better sent in the
      DevInfo block, rather than a new block so that implementations are
      not tempted to send the data by value.  Conversely, data which is
      small may best be sent in a separate block so that it can be sent
      by value

   Availability of a server:  Providing the data via the device block
      requires a server be made available to retrieve the data.
      Providing the data via new block allows it to be sent by value
      (CID).

3.3.9.  emergencyCall.DevInfo Example


   <?xml version="1.0" encoding="UTF-8"?>
   <svc:emergencyCall.DevInfo
        xmlns:svc="urn:ietf:params:xml:ns:emergencyCall.DevInfo"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
       <svc:DeviceClassification>Fixed phone</svc:DeviceClassification>
       <svc:DeviceMfgr>Nokia</svc:DeviceMfgr>
       <svc:DeviceModelNr>Lumia 800</svc:DeviceModelNr>



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       <svc:UniqueDeviceID>35788104</svc:UniqueDeviceID>
       <svc:TypeOfDeviceID>IMEI</svc:TypeOfDeviceID>
   </svc:emergencyCall.DevInfo>

                  Figure 7: emergencyCallDevInfo Example

3.4.  Owner/Subscriber Information

   This block describes the owner of the device (if provided by the
   device) or the subscriber information, if provided by a service
   provider.  The contact location is not necessarily the location of
   the caller or incident, but is rather the nominal contact address.
   The mime subtype is "application/emergencyCall.Subscriber+xml".

3.4.1.  xCard for Subscriber's Data

   Data Element:  xCARD for Subscriber's Data


   Use:  Conditional: Some services (e.g., prepaid phones, initialized
      phones, etc.)  may not have this information.


   XML Element:  <SubscriberData>


   Description:  Information known by the service provider or device
      about the subscriber; e.g., Name, Address, Individual Telephone
      Number, Main Telephone Number and any other data.  N, ORG (if
      appropriate), ADR, TEL, EMAIL are suggested at a minimum.  If more
      than one TEL property is provided, a parameter from the vCard
      Property Value registry MUST be specified on each TEL.


   Reason for Need:  When the caller is unable to provide information,
      this data may be used to obtain it


   How Used by Call Taker:  Obtaining critical information about the
      caller and possibly the location when it is not able to be
      obtained otherwise.

3.4.2.  emergencyCall.SubInfo Example


   <?xml version="1.0" encoding="UTF-8"?>
   <ad:emergencyCall.SubInfo
        xmlns:ad="urn:ietf:params:xml:ns:emergencyCall.SubInfo"



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        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
       <xc:SubscriberData xmlns:xc="urn:ietf:params:xml:ns:vcard-4.0">
           <vcards xmlns="urn:ietf:params:xml:ns:vcard-4.0">
               <vcard>
                   <fn><text>Simon Perreault</text></fn>
                   <n>
                       <surname>Perreault</surname>
                       <given>Simon</given>
                       <additional/>
                       <prefix/>
                       <suffix>ing. jr</suffix>
                       <suffix>M.Sc.</suffix>
                   </n>
                   <bday><date>--0203</date></bday>
                   <anniversary>
                       <date-time>20090808T1430-0500</date-time>
                   </anniversary>
                   <gender><sex>M</sex></gender>
                   <lang>
                       <parameters><pref><integer>1</integer></pref>
                       </parameters>
                       <language-tag>fr</language-tag>
                   </lang>
                   <lang>
                       <parameters><pref><integer>2</integer></pref>
                       </parameters>
                       <language-tag>en</language-tag>
                   </lang>
                   <org>
                       <parameters><type><text>work</text></type>
                       </parameters>
                       <text>Viagenie</text>
                   </org>
                   <adr>
                       <parameters>
                           <type><text>work</text></type>
                           <label><text>Simon Perreault
                               2875 boul. Laurier, suite D2-630
                               Quebec, QC, Canada
                               G1V 2M2</text></label>
                       </parameters>
                       <pobox/>
                       <ext/>
                       <street>2875 boul. Laurier, suite D2-630</street>
                       <locality>Quebec</locality>
                       <region>QC</region>
                       <code>G1V 2M2</code>
                       <country>Canada</country>



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                   </adr>
                   <tel>
                       <parameters>
                           <type>
                               <text>work</text>
                               <text>voice</text>
                           </type>
                       </parameters>
                       <uri>tel:+1-418-656-9254;ext=102</uri>
                   </tel>
                   <tel>
                       <parameters>
                           <type>
                               <text>work</text>
                               <text>text</text>
                               <text>voice</text>
                               <text>cell</text>
                               <text>video</text>
                           </type>
                       </parameters>
                       <uri>tel:+1-418-262-6501</uri>
                   </tel>
                   <email>
                       <parameters><type><text>work</text></type>
                       </parameters>
                       <text>simon.perreault@viagenie.ca</text>
                   </email>
                   <geo>
                       <parameters><type><text>work</text></type>
                       </parameters>
                       <uri>geo:46.766336,-71.28955</uri>
                   </geo>
                   <key>
                       <parameters><type><text>work</text></type>
                       </parameters>
                       <uri>
                       http://www.viagenie.ca/simon.perreault/simon.asc
                       </uri>
                   </key>
                   <tz><text>America/Montreal</text></tz>
                   <url>
                       <parameters><type><text>home</text></type>
                       </parameters>
                       <uri>http://nomis80.org</uri>
                   </url>
               </vcard>
           </vcards>
       </xc:SubscriberData>



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   </ad:emergencyCall.SubInfo>

                  Figure 8: emergencyCall.SubInfo Example

3.5.  Comment

   This block provides a mechanism for the data provider to supply
   extra, human readable information to the PSAP.  It is not intended
   for a general purpose extension mechanism.  The mime subtype is
   "application/emergencyCall.Comment+xml"

3.5.1.  Comment

   Data Element:  EmergencyCall.Comment


   Use:  Optional


   XML Element:  <Comment>


   Description:  Human readable text providing additional information to
      the PSAP staff.


   Reason for Need:  Explanatory information for values in the data
      structure


   How Used by Call Taker:  To interpret the data provided

3.5.2.  emergencyCall.Comment Example


   <?xml version="1.0" encoding="UTF-8"?>
   <sub:emergencyCall.Comment
        xmlns:sub="urn:ietf:params:xml:ns:emergencyCall.Comment"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
      <sub:Comment xml:lang="en">This is an example text.</sub:Comment>
   </sub:emergencyCall.Comment>

                  Figure 9: EmergencyCall.Comment Example

4.  Transport

   This section defines how to convey additional data to an emergency
   service provider.  Two different means are specified: the first uses



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   the call signaling; the second uses the <provided-by> element of a
   PIDF-LO [RFC4119].

   1.  First, the ability to embed a Uniform Resource Identifier (URI)
       in an existing SIP header field, the Call-Info header, is
       defined.  The URI points to the additional data structure.  The
       Call-Info header is specified in Section 20.9 of [RFC3261].  This
       document adds a new token with the value 'emergencyCallData' for
       the Call-Info "purpose" parameter.  If the "purpose" parameter is
       set to 'emergencyCallData' then the Call-Info header contains
       either an HTTPS URL pointing to an external resource or a CID
       (content indirection) URI that allows the data structure to be
       placed in the body of the SIP message.  The "purpose" parameter
       also contains an indication of what kind of data is available at
       the URI.

       As the data is conveyed using a URI in the SIP signaling, the
       data itself may reside on an external resource, or may be
       contained within the body of the SIP message.  When the URI
       refers to data at an external resource, the data is said to be
       passed by reference.  When the URI refers to data contained
       within the body of the SIP message, the data is said to be passed
       by value.  A PSAP or emergency responder is able to examine the
       type of data provided and selectively inspect the data it is
       interested in, while forwarding all of it (the values or
       references) to downstream entities.

       To be conveyed in a SIP body additional data about a call is
       defined as a series of MIME objects, each with an XML data
       structure contained inside.  As usual, whenever more than one
       MIME part is included in the body of a message, MIME-multipart
       (i.e., 'multipart/mixed') encloses them all.  This document
       defines the XML schemas and MIME types used for each block.  When
       additional data is passed by value in the SIP signaling, each CID
       URL points to one block in the body.  Multiple URIs are used
       within a Call-Info header field (or multiple Call-Info header
       fields) to point to multiple blocks.  When additional data is
       provided by reference (in SIP signaling or Provided-By), each
       HTTPS URL references one block; the data is retrieved with an
       HTTPS GET operation, which returns one of the blocks as an XML
       object.

   2.  Second, the ability to embed additional data structures in the
       <provided-by> element of a PIDF-LO [RFC4119] is defined.  Besides
       a service provider in the call path, the access network provider
       may also have similar information that may be valuable to the
       PSAP.  The access network provider may provide location in the
       form of a PIDF-LO from a location server via a location



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       configuration protocol.  The data structures described in this
       document are not specific to the location itsef, but rather
       provides descriptive information having to do with the immediate
       circumstances about the provision of the location (who the access
       network is, how to contact that entity, what kind of service the
       access network provides, subscriber information, etc.).  This
       data is similar in nearly every respect to the data known by
       service providers in the path of the call.  When the access
       network provider and service provider are separate entities, the
       access network does not participate in the application layer
       signaling (and hence cannot add a Call-Info header field to the
       SIP message), but may provide location information to assist in
       locating the caller's device.  The <provided-by> element of the
       PIDF-LO is a mechanism for the access network provider to supply
       the information about the entity or organization that supplied
       this location information.  For this reason, this document
       describes a namespace per RFC 4119 for inclusion in the
       <provided-by> element of a PIDF-LO for adding information known
       to the access network provider.

   One or more blocks of data registered in the Emergency Call
   Additional Data registry, as defined in Section 9.1, may be included
   or referenced in the SIP signaling (using the Call-Info header field)
   or in the <provided-by> element of a PIDF-LO.  Every block must be
   one of the types in the registry.  Since the data of an emergency
   call may come from multiple sources, the data itself needs
   information describing the source.  Consequently, each entity adding
   additional data MUST supply the "Data Provider" block.  All other
   blocks are optional, but each entity SHOULD supply any blocks where
   it has at least some of the information in the block.

4.1.  Transmitting Blocks using the Call-Info Header

   A URI to a block MAY be inserted in a SIP request or response method
   (most often INVITE or MESSAGE) with a Call-Info header field
   containing a purpose of "emergencyCallData" together with the type of
   data available at the URI.  The type of data is denoted by including
   the root of the MIME type (not including the emergencyCall prefix and
   the +xml suffix) with a "."  separator.  For example, when
   referencing a block with MIME type 'application/
   emergencyCall.ProviderInfo+xml', the 'purpose' parameter is set to
   'emergencyCallData.ProviderInfo'.  An example "Call-Info" header
   field for this would be:

   Call-Info:  https://www.example.com/23sedde3;
       purpose="emergencyCallData.ProviderInfo"





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   The Call-info header with purpose='emergencyCallData' MUST only be
   sent on an emergency call, which can be ascertained by the presence
   of an emergency service urn in a Route header of a SIP message.

   If the data is provided by reference, an HTTPS URI MUST be included
   and consequently Transport Layer Security (TLS) protection is applied
   for protecting the retrieval of the information.

   The data may also be supplied by value in a SIP message.  In this
   case, Content Indirection (CID) [RFC2392] is used, with the CID URL
   referencing the MIME body part.

   More than one Call-Info header with an emergencyCallData purpose can
   be expected, but at least one MUST be provided.  The device MUST
   provide one if it knows no service provider is in the path of the
   call.  The device MAY insert one if it uses a service provider.  Any
   service provider in the path of the call MUST insert its own.  For
   example, a device, a telematics service provider in the call path, as
   well as the mobile carrier handling the call will each provide one.
   There may be circumstances where there is a service provider who is
   unaware that the call is an emergency call and cannot reasonably be
   expected to determine that it is an emergency call.  In that case,
   that service provider is not expected to provide emergencyCallData.

4.2.  Transmitting Blocks by Reference using the Provided-By Element

   The 'emergencyCallDataReference' element is used to transmit an
   additional data block by reference within a 'Provided-By' element of
   a PIDF-LO.  The 'emergencyCallDataReference' element has two
   attributes: 'ref' to specify the URL, and 'purpose' to indicate the
   type of data block referenced.  The value of 'ref' is an HTTPS URL
   that resolves to a data structure with information about the call.
   The value of 'purpose' is the same as used in a 'Call-Info' header
   field (as specified in Section 4.1).

   For example, to reference a block with MIME type 'application/
   emergencyCall.ProviderInfo+xml', the 'purpose' parameter is set to
   'emergencyCallData.ProviderInfo'.  An example
   'emergencyCallDataReference' element for this would be:

      <emergencyCallDataReference ref="https://www.example.com/23sedde3"
      purpose="emergencyCallData.ProviderInfo"/>









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4.3.  Transmitting Blocks by Value using the Provided-By Element

   It is RECOMMENDED that access networks supply the data specified in
   this document by reference, but they MAY provide the data by value.

   The 'emergencyCallDataValue' element is used to transmit an
   additional data block by value within a 'Provided-By' element of a
   PIDF-LO.  The 'emergencyCallDataValue' element has one attribute:
   'purpose' to indicate the type of data block contained.  The value of
   'purpose' is the same as used in a 'Call-Info' header field (as
   specified in Section 4.1, and in Section 4.1).  The same XML
   structure as would be wrapped in the corresponding MIME type is
   placed inside the emergencyCallDataValue element.

   For example:



   <provided-by xmlns="urn:ietf:params:xml:ns:emergencyCallAddlData">
      <emergencyCallDataValue purpose="emergencyCallData.ProviderInfo">
           <ProviderID>Test</ProviderID>
           <ProviderIDSeries>NENA</ProviderIDSeries>
           <TypeOfProviderID>Access Infrastructure Provider
           </TypeOfProviderID>
           <ContactURI>sip:15555550987@burf.example.com;user=phone
           </ContactURI>
       </emergencyCallDataValue>
   </provided-by>


                       Example Provided-By by Value.

5.  Examples

   This section provides three examples of communicating additional
   data.  In Figure 10 additional data is communicated in a SIP INVITE
   per value.  In Figure 11 we illustrate how additional data is added
   by a SIP proxy per reference.  Finally, an example of conveying
   additional data in the <Provided-By> is illustrated.


      INVITE sips:bob@biloxi.example.com SIP/2.0
      Via: SIPS/2.0/TLS pc33.atlanta.example.com;branch=z9hG4bK74bf9
      Max-Forwards: 70
      To: Bob <sips:bob@biloxi.example.com>
      From: Alice <sips:alice@atlanta.example.com>;tag=9fxced76sl
      Call-ID: 3848276298220188511@atlanta.example.com
      Call-Info: <http://wwww.example.com/alice/photo.jpg> ;purpose=icon,



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        <http://www.example.com/alice/> ;purpose=info,
        <cid:1234567890@atlanta.example.com>
            ;purpose=emergencyCallData.ProviderInfo
      Geolocation: <cid:target123@atlanta.example.com>
      Geolocation-Routing: no
      Accept: application/sdp, application/pidf+xml,
         application/emergencyCallProviderinfo+xml
      CSeq: 31862 INVITE
      Contact: <sips:alice@atlanta.example.com>
      Content-Type: multipart/mixed; boundary=boundary1

      Content-Length: ...

      --boundary1

      Content-Type: application/sdp

      ...SDP goes here

      --boundary1

      Content-Type: application/pidf+xml
      Content-ID: <target123@atlanta.example.com>

      \0x2026PIDF-LO goes here

      --boundary1--

      Content-Type: application/emergencyCall.ProviderInfo+xml
      Content-ID: <1234567890@atlanta.example.com>

      ...Additional Data goes here

      --boundary1--

      Figure 10: Example: Attaching Additional Data via CID to a SIP
                                  INVITE.


      INVITE sips:bob@biloxi.example.com SIP/2.0
      Via: SIPS/2.0/TLS pc33.atlanta.example.com;branch=z9hG4bK74bf9
      Max-Forwards: 70
      To: Bob <sips:bob@biloxi.example.com>
      From: Alice <sips:alice@atlanta.example.com>;tag=9fxced76sl
      Call-ID: 3848276298220188511@atlanta.example.com
      Call-Info: <http://wwww.example.com/alice/photo.jpg> ;purpose=icon,
        <http://www.example.com/alice/> ;purpose=info,
        <https://www.example.com/abc123456/>



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            ;purpose=emergencyCallData.ProviderInfo
      Geolocation: <cid:target123@atlanta.example.com>
      Geolocation-Routing: no
      Accept: application/sdp, application/pidf+xml,
         application/emergencyCallProviderinfo+xml
      CSeq: 31862 INVITE
      Contact: <sips:alice@atlanta.example.com>
      Content-Type: multipart/mixed; boundary=boundary1

      Content-Length: ...

      --boundary1

      Content-Type: application/sdp

      ...SDP goes here

      --boundary1

      Content-Type: application/pidf+xml
      Content-ID: <target123@atlanta.example.com>

      PIDF-LO goes here

      --boundary1--

   Figure 11: Example: Attaching Additional Data per Reference in a SIP
                                  INVITE.


   TBD.

   Figure 12: Example: Attaching Additional Data to Provided-By Element.

6.  XML Schemas

   This section defines the XML schemas of the five data blocks.

6.1.  emergencyCall.ProviderInfo XML Schema



   <?xml version="1.0"?>
   <xs:schema
      targetNamespace="urn:ietf:params:xml:ns:emergencyCall.ProviderInfo"
      xmlns:xs="http://www.w3.org/2001/XMLSchema"
      xmlns:ad="urn:ietf:params:xml:ns:emergencyCall.ProviderInfo"
      xmlns:xml="http://www.w3.org/XML/1998/namespace"



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      xmlns:xc="urn:ietf:params:xml:ns:vcard-4.0"
      elementFormDefault="qualified"
       ttributeFormDefault="unqualified">

        <xs:import namespace="http://www.w3.org/XML/1998/namespace"
                   schemaLocation="http://www.w3.org/2001/xml.xsd"/>


        <xs:simpleType name="iso3166a2">
          <xs:restriction base="xs:token">
            <xs:pattern value="[A-Z]{2}"/>
          </xs:restriction>
        </xs:simpleType>

       <xs:element name="emergencyCall.ProviderInfo">
           <xs:complexType>
               <xs:sequence>
                   <xs:element name="DataProviderString"
                       type="xs:string" minOccurs="1" maxOccurs="1"/>
                   <xs:element name="ProviderID"
                       type="xs:string" minOccurs="0" maxOccurs="1"/>
                   <xs:element name="ProviderIDSeries"
                       type="xs:string" minOccurs="0" maxOccurs="1"/>
                   <xs:element name="TypeOfProvider"
                       type="xs:string" minOccurs="0" maxOccurs="1"/>
                   <xs:element name="ContactURI" type="xs:anyURI"
                       minOccurs="1" maxOccurs="1"/>
                   <xs:element name="Language" type="ad:iso3166a2"
                       minOccurs="0" maxOccurs="unbounded" />
                     <xs:element name="DataProviderContact"
                         type="xc:vcardType" minOccurs="0"
                         maxOccurs="1"/>

                   <xs:any namespace="##other" processContents="lax"
                       minOccurs="0" maxOccurs="unbounded"/>
               </xs:sequence>
           </xs:complexType>
       </xs:element>
   </xs:schema>

             Figure 13: emergencyCall.ProviderInfo XML Schema

6.2.  emergencyCall.SvcInfo XML Schema


   <?xml version="1.0"?>
   <xs:schema
        targetNamespace="urn:ietf:params:xml:ns:emergencyCall.SvcInfo"



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        xmlns:xs="http://www.w3.org/2001/XMLSchema"
        xmlns:svc="urn:ietf:params:xml:ns:emergencyCall.SvcInfo"
        xmlns:xml="http://www.w3.org/XML/1998/namespace"
        elementFormDefault="qualified"
        attributeFormDefault="unqualified">

        <xs:import namespace="http://www.w3.org/XML/1998/namespace"
                   schemaLocation="http://www.w3.org/2001/xml.xsd"/>

       <xs:element name="emergencyCall.SvcInfo">
           <xs:complexType>
               <xs:sequence>
                   <xs:element name="SvcEnvironment"
                     type="xs:string" minOccurs="1" maxOccurs="1"/>
                   <xs:element name="SvcDelByProvider"
                     type="xs:string" minOccurs="1" maxOccurs="unbounded"/>
                   <xs:element name="SvcMobility"
                     type="xs:string" minOccurs="1" maxOccurs="1"/>
                   <xs:element name="Link"
                       type="xs:string" minOccurs="0" maxOccurs="1"/>
                   <xs:any namespace="##other" processContents="lax"
                       minOccurs="0" maxOccurs="unbounded"/>
               </xs:sequence>
           </xs:complexType>
       </xs:element>
   </xs:schema>

                Figure 14: emergencyCall.SvcInfo XML Schema

6.3.  emergencyCall.DevInfo XML Schema



   <?xml version="1.0"?>
   <xs:schema
        targetNamespace="urn:ietf:params:xml:ns:emergencyCall.DevInfo"
        xmlns:xs="http://www.w3.org/2001/XMLSchema"
        xmlns:svc="urn:ietf:params:xml:ns:emergencyCall.DevInfo"
        xmlns:xml="http://www.w3.org/XML/1998/namespace"
        elementFormDefault="qualified"
        attributeFormDefault="unqualified">

        <xs:import namespace="http://www.w3.org/XML/1998/namespace"
                   schemaLocation="http://www.w3.org/2001/xml.xsd"/>

       <xs:element name="emergencyCall.DevInfo">
           <xs:complexType>
               <xs:sequence>



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                   <xs:element name="DeviceClassification"
                       type="xs:string" minOccurs="0" maxOccurs="1"/>
                   <xs:element name="DeviceMfgr"
                       type="xs:string" minOccurs="0" maxOccurs="1"/>
                   <xs:element name="DeviceModelNr"
                       type="xs:string" minOccurs="0" maxOccurs="1"/>
                   <xs:element name="UniqueDeviceID"
                       type="xs:string" minOccurs="0" maxOccurs="1"/>
                   <xs:element name="TypeOfDeviceID"
                       type="xs:string" minOccurs="0" maxOccurs="1"/>
                   <xs:element name="DeviceSpecificData"
                       type="xs:anyURI" minOccurs="0" maxOccurs="1"/>
                   <xs:element name="DeviceSpecificType"
                       type="xs:string" minOccurs="0" maxOccurs="1"/>
                   <xs:any namespace="##other" processContents="lax"
                       minOccurs="0" maxOccurs="unbounded"/>
               </xs:sequence>
           </xs:complexType>
       </xs:element>
   </xs:schema>

                Figure 15: emergencyCallDevInfo XML Schema

6.4.  emergencyCall.SubInfo XML Schema



   <?xml version="1.0"?>
   <xs:schema
       targetNamespace="urn:ietf:params:xml:ns:emergencyCall.SubInfo"
       xmlns:xs="http://www.w3.org/2001/XMLSchema"
       xmlns:sub="urn:ietf:params:xml:ns:emergencyCall.SubInfo"
       xmlns:xml="http://www.w3.org/XML/1998/namespace"
       xmlns:xc="urn:ietf:params:xml:ns:vcard-4.0"
       elementFormDefault="qualified" attributeFormDefault="unqualified">

       <xs:import namespace="http://www.w3.org/XML/1998/namespace"
           schemaLocation="http://www.w3.org/2001/xml.xsd"/>

       <xs:element name="emergencyCall.SubInfo">
           <xs:complexType>
               <xs:sequence>
                   <!-- VCard data structure goes in here.
                   <xs:element name="SubscriberData"
                       type="xc:vcard" minOccurs="0" maxOccurs="1"/>
                   -->
                <xs:any namespace="##other" processContents="lax"
                    minOccurs="0" maxOccurs="unbounded"/>



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               </xs:sequence>
           </xs:complexType>
       </xs:element>
   </xs:schema>

                Figure 16: emergencyCall.SubInfo XML Schema

6.5.  emergencyCall.Comment XML Schema



   <?xml version="1.0"?>
   <xs:schema
        targetNamespace="urn:ietf:params:xml:ns:emergencyCall.Comment"
        xmlns:xs="http://www.w3.org/2001/XMLSchema"
        xmlns:sub="urn:ietf:params:xml:ns:emergencyCall.Comment"
        xmlns:xml="http://www.w3.org/XML/1998/namespace"
        elementFormDefault="qualified" attributeFormDefault="unqualified">

        <xs:import namespace="http://www.w3.org/XML/1998/namespace"
                   schemaLocation="http://www.w3.org/2001/xml.xsd"/>

       <xs:element name="emergencyCall.Comment">
           <xs:complexType>
               <xs:sequence>
                   <xs:element name="Comment"
                       type="sub:CommentType" minOccurs="0" maxOccurs="unbounded"/>
                   <xs:any namespace="##other" processContents="lax" minOccurs="0"
                       maxOccurs="unbounded"/>
              </xs:sequence>
           </xs:complexType>
       </xs:element>

       <xs:complexType name="CommentType">
        <xs:simpleContent>
         <xs:extension base="xs:string">
          <xs:attribute ref="xml:lang"/>
         </xs:extension>
        </xs:simpleContent>
       </xs:complexType>

   </xs:schema>

                Figure 17: EmergencyCall.Comment XML Schema

7.  Security Considerations





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   The information in this data structure will usually be considered
   private.  HTTPS is specified to require the provider of the
   information to validate the credentials of the requester.  While the
   creation of a PKI that has global scope may be difficult, the
   alternatives to creating devices and services that can provide
   critical information securely are more daunting.  The provider may
   enforce any policy it wishes to use, but PSAPs and responder agencies
   should deploy a PKI so that providers of additional data can check
   the certificate of the client and decide the appropriate policy to
   enforce based on that certificate.

   Ideally, the PSAP and emergency responders will be given credentials
   signed by an authority trusted by the data provider.  In most
   circumstances, nationally recognized credentials would be sufficient,
   and if the emergency services arranges a PKI, data providers could be
   provisioned with the root CA public key for a given nation.  Some
   nations are developing a PKI for this, and related, purposes.  Since
   calls could be made from devices where the device and/or the service
   provider(s) are not local to the emergency authorities, globally
   recognized credentials are useful.  This might be accomplished by
   extending the notion of the "forest guide" described in [RFC5222] to
   allow the forest guide to provide the credential of the PKI root for
   areas that it has coverage information for, but standards for such a
   mechanism are not yet available.  In its absence, the data provider
   will need to obtain the root CA credentials for any areas it is
   willing to provide additional data by out of band means.  With the
   credential of the root CA for a national emergency services PKI, the
   data provider server can validate the credentials of an entity
   requesting additional data by reference.

   The data provider also needs a credential that can be verified by the
   emergency services to know that it is receiving data from the right
   server.  The emergency authorities could provide credentials,
   distinguishable from credentials it provides to emergency responders
   and PSAPs, which could be used to validate data providers.  Such
   credentials would have to be acceptable to any PSAP or responder that
   could receive a call with additional data supplied by that provider.
   This would be extensible to global credential validation using the
   forest guide as above.  In the absence of such credentials, the
   emergency authorities could maintain a list of local data providers'
   credentials provided to it out of band.  At a minimum, the emergency
   authorities could obtain a credential from the DNS entry of the
   domain in the Addional Data URI to at least validate that the server
   is known to the domain providing the URI.

   Data provided by devices by reference have similar credential
   validation issues to service providers, and the solutions are the
   same.



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8.  Privacy Considerations

   [Editor's Note: Text to be re-written.]

   In regions where callers can elect to suppress certain personally
   identifying information, the network or PSAP functionality can
   inspect privacy flags within the SIP headers to determine what
   information may be passed, stored, or displayed to comply with local
   policy or law.

   There is much private data in this information.  Local regulations
   may govern what data must be provided in emergency calls, but in
   general, the emergency call system is often aided by the kinds of
   information described in this document.  There is a tradeoff between
   the privacy considerations and the utility of the data.  Certainly,
   if the data cannot be protected, due to failure to establish (by TLS)
   a secure connection to the data provider, data SHOULD NOT be sent
   unless specifically required by regulation.

   Some forms of data can be sent by value in the SIP signaling or by
   value (URL in SIP signaling).  When data is sent by value, all
   intermediaries have access to the data.  If the data is private,
   sending by reference is more appropriate.

9.  IANA Considerations

9.1.  Registry creation

   This document creates a new registry called 'Emergency Call
   Additional Data'.  The following subregistries are created in
   Emergency Call Additional Data:

9.1.1.  Additional Call Data Provider ID Series Registry

   This document creates a new subregistry called 'Additional Call Data
   Provider ID Series'.  As defined in [RFC5226], this registry operates
   under "Expert Review" rules.  The expert should determine that the
   entity requesting a new value is a legitimate issuer of service
   provider IDs suitable for use in Additional Call Data.

   The content of this registry includes:

   Name: The identifier which will be used in the ProviderIDSeries
   element

   Source: The full name of the organization issuing the identifiers

   URL: A URL to the organization for further information



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   The initial set of values is listed in the table below.

   +-----------+-----------+--------------+----------------------+
   | Name      | Source                   | URL                  |
   +-----------+--------------------------+----------------------+
   | NENA      | North American Emergency | http://www.nena.org  |
   |           | Number Association       |                      |
   | EENA      | European Emergency       | http://www.eena.org  |
   |           | Number Association       |                      |
   +-----------+--------------------------+----------------------+


9.1.2.  Additional Call Data Service Provider Type Registry

   This document creates a new subregistry called 'Service Provider
   Type'.  As defined in [RFC5226], this registry operates under "Expert
   Review".  The expert should determine that the proposed new value is
   distinct from existing values and appropriate for use in the
   TypeOfServicerProvider element

   The content of this registry includes:

   Name: Value to be used in TypeOfServiceProvider.

   Description: A short description of the type of service provider

   The initial set of values is defined in Figure 1.

9.1.3.  Additional Call Data Service Delivered Registry

   This document creates a new registry called 'Additional Call Data
   Service Delivered'.  As defined in [RFC5226], this registry operates
   under "Expert Review" rules.  The expert should consider whether the
   proposed service is unique from existing services and the definition
   of the service will be clear to implementors and PSAPS/responders.

   The content of this registry includes:

   Name: enumeration token of the service.

   Description: Short description identifying the service.

   The initial set of values are defined in Figure 3.

9.1.4.  Additional Call Data Device Classification Registry

   This document creates a new registry called 'Additional Call Data
   Device Classification'.  As defined in [RFC5226], this registry



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   operates under "Expert Review" rules.  The expert should consider
   whether the proposed class is unique from existing classes and the
   definition of the class will be clear to implementors and PSAPS/
   responders.

   The content of this registry includes:

   Name: enumeration token of the device classification.

   Description: Short description identifying the device type.

   The initial set of values are defined in Figure 5.

9.1.5.  Additional Call Data Device ID Type Type Registry

   This document creates a new registry called 'Additional Call Data
   Device ID Type'.  As defined in [RFC5226], this registry operates
   under "Expert Review" rules.  The expert should ascertain that the
   proposed type is well understood, and provides the information useful
   to PSAPs and responders to uniquely identify a device.

   The content of this registry includes:

   Name: enumeration token of the device id type.

   Description: Short description identifying type of device id.

   The initial set of values are defined in Figure 6.

9.1.6.  Device/Service Specific Additional Data Type Registry

   This document creates a new registry called 'Device/Service Specific
   Additional Data Type Registry'.  As defined in [RFC5226], this
   registry operates under "Expert Review" and "Specification Required"
   rules.  The expert should ascertain that the proposed type is well
   understood, and provides information useful to PSAPs and responders.
   The specification must contain a complete description of the data,
   and a precise format specification suitable to allow interoperable
   implementations.

   The content of this registry includes:

   Name: enumeration token of the data type.

   Description: Short description identifying the the data.

   Specification: Citation for the specification of the data.




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   The initial set of values are listed below:

   +---------+----------------------------------------+----------------+
   | Token   | Description                            | Specification  |
   +---------+----------------------------------------+----------------+
   | IEE1512 | Common Incident Management Message Set | IEEE 1512-2006 |
   +---------+----------------------------------------+----------------+
   | VEDS    | Vehicle Emergency Data Set             | APCO/NENA VEDS |
   +---------+----------------------------------------+----------------+


9.1.7.  Additional Call Data Blocks Registry

   This document creates a new subregistry called 'Additional Call Data
   Blocks' in the purpose registry established by RFC 261.  As defined
   in [RFC5226], this registry operates under "Expert Review" and
   "Specification Required" rules.  The expert is responsible for
   verifying that the document contains a complete and clear
   specification of the block and the block does not obviously duplicate
   existing blocks.

   The content of this registry includes:

   Name: Element Name of enclosing block.

   Reference: The document that describes the block

   This document defines the following set of values:

      +--------------+-----------+
      | Token        | Reference |
      +--------------+-----------+
      | ProviderInfo | RFCXXXX   |
      | SvcInfo      | RFCXXXX   |
      | DevInfo      | RFCXXXX   |
      | Subscriber   | RFCXXXX   |
      | Comment      | RFCXXXX   |
      +--------------+-----------+
   RFC Editor Note:
      replace XXXX in the table above with this documents RFC number


9.2.  'emergencyCallData' Purpose Parameter Value

   This document defines the 'emergencyCall' value for the "purpose"
   parameter of the Call-Info header field.  The Call-Info header and
   the corresponding registry for the 'purpose' parameter was
   established with RFC 3261 [RFC3261].



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      Header       Parameter   New
      Field        Name        Value               Reference
      ----------   ---------   -----------------   ---------
      Call-Info    purpose     emergencyCall   [This RFC]




9.3.  URN Sub-Namespace Registration for provided-by Registry Entry

   This section registers the namespace specified in Section 9.5.1 in
   the provided-by registry established by RFC 4119, for usage within
   the 'provided-by' element of a PIDF-LO.

9.3.1.  Provided-By XML Schema



   <?xml version="1.0"?>
   <xs:schema
     targetNamespace="urn:ietf:params:xml:ns:pidf:geopriv10:emergencyCallData"
     xmlns:xs="http://www.w3.org/2001/XMLSchema";
     xmlns:ad="urn:ietf:params:xml:ns:pidf:geopriv10:emergencyCallData"
     xmlns:xml="http://www.w3.org/XML/1998/namespace";
     xmlns:pi="urn:ietf:params:xml:ns:emergencyCall.ProviderInfo"
     xmlns:svc="urn:ietf:params:xml:ns:emergencyCall.SvcInfo"
     xmlns:dev="urn:ietf:params:xml:ns:emergencyCall.DevInfo"
     xmlns:sub="urn:ietf:params:xml:ns:emergencyCall.SubInfo"
     xmlns:com="urn:ietf:params:xml:ns:emergencyCall.Comment"
     elementFormDefault="qualified" attributeFormDefault="unqualified">

     <!-- Additional Data By Reference -->

     <xs:element name="emergencyCallDataReference">
       <xs:complexType>
         <xs:sequence>
         <xs:element name="emergencyProviderInfo"
             type="xs:anyURI" minOccurs="0" maxOccurs="1"/>
         <xs:element name="emergencyServiceInfo"
             type="xs:anyURI" minOccurs="0" maxOccurs="1"/>
         <xs:element name="emergencyDeviceInfo"
             type="xs:anyURI" minOccurs="0" maxOccurs="1"/>
         <xs:element name="emergencySubscriberInfo"
             type="xs:anyURI" minOccurs="0" maxOccurs="1"/>
         <xs:element name="emergencyComment"
             type="xs:anyURI" minOccurs="0" maxOccurs="1"/>
         <xs:element name="anyOtherRefs"
             type="xs:anyURI" minOccurs="0" maxOccurs="unbounded"/>



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         <xs:any namespace="##other" processContents="lax"
             minOccurs="0" maxOccurs="unbounded"/>

       </xs:sequence>
       </xs:ComplexType>
     </xs:element>

     <!-- Additional Data By Value -->

     <xs:element name="emergencyCallDataValue">
       <xs:complexType>
         <xs:sequence>
         <xs:element name="emergencyProviderInfo"
             type="pi:emergencyCall.ProviderInfo"
             minOccurs="0" maxOccurs="1"/>
         <xs:element name="emergencyServiceInfo"
             type="svc:emergencyCall.SvcInfo"
             minOccurs="0" maxOccurs="1"/>
         <xs:element name="emergencyDeviceInfo"
             type="dev:emergencyCall.DeviceInfo"
             minOccurs="0" maxOccurs="1"/>
         <xs:element name="emergencySubscriberInfo"
             type="sub:emergencyCall.SubInfo"
             minOccurs="0" maxOccurs="1"/>
         <xs:element name="emergencyComment"
             type="com:emergencyCall.Comment"
             minOccurs="0" maxOccurs="1"/>
         <xs:any namespace="##other" processContents="lax"
             minOccurs="0" maxOccurs="unbounded"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>

     <xs:any namespace="##other" processContents="lax"
             minOccurs="0" maxOccurs="unbounded"/>

   </xs:schema>

                     Figure 18: Provided-By XML Schema

9.4.  MIME Registrations










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9.4.1.  MIME Content-type Registration for 'application/
        emergencyCall.ProviderInfo+xml'

   This specification requests the registration of a new MIME type
   according to the procedures of RFC 4288 [RFC4288] and guidelines in
   RFC 3023 [RFC3023].

      MIME media type name: application

      MIME subtype name: emergencyCall.ProviderInfo+xml

      Mandatory parameters: none

      Optional parameters: charset

      Indicates the character encoding of enclosed XML.

      Encoding considerations:

      Uses XML, which can employ 8-bit characters, depending on the
      character encoding used.  See Section 3.2 of RFC 3023 [RFC3023].

      Security considerations:

      This content type is designed to carry the data provider
      information, which is a sub-category of additional data about an
      emergency call.

      Since this data contains personal information appropriate
      precautions have to be taken to limit unauthorized access,
      inappropriate disclosure to third parties, and eavesdropping of
      this information.  Please refer to Section 7 and Section 8 for
      more information.

      Interoperability considerations: None

      Published specification: [TBD: This specification]

      Applications which use this media type: Emergency Services

      Additional information:

      Magic Number: None

      File Extension: .xml

      Macintosh file type code: 'TEXT'




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      Person and email address for further information: Hannes
      Tschofenig, Hannes.Tschofenig@gmx.net

      Intended usage: LIMITED USE

      Author: This specification is a work item of the IETF ECRIT
      working group, with mailing list address <ecrit@ietf.org>.

      Change controller: The IESG <ietf@ietf.org>

9.4.2.  MIME Content-type Registration for 'application/
        emergencyCall.SvcInfo+xml'

   This specification requests the registration of a new MIME type
   according to the procedures of RFC 4288 [RFC4288] and guidelines in
   RFC 3023 [RFC3023].

      MIME media type name: application

      MIME subtype name: emergencyCall.SvcInfo+xml

      Mandatory parameters: none

      Optional parameters: charset

      Indicates the character encoding of enclosed XML.

      Encoding considerations:

      Uses XML, which can employ 8-bit characters, depending on the
      character encoding used.  See Section 3.2 of RFC 3023 [RFC3023].

      Security considerations:

      This content type is designed to carry the service information,
      which is a sub-category of additional data about an emergency
      call.

      Since this data contains personal information appropriate
      precautions have to be taken to limit unauthorized access,
      inappropriate disclosure to third parties, and eavesdropping of
      this information.  Please refer to Section 7 and Section 8 for
      more information.

      Interoperability considerations: None

      Published specification: [TBD: This specification]




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      Applications which use this media type: Emergency Services

      Additional information:

      Magic Number: None

      File Extension: .xml

      Macintosh file type code: 'TEXT'


      Person and email address for further information: Hannes
      Tschofenig, Hannes.Tschofenig@gmx.net

      Intended usage: LIMITED USE

      Author: This specification is a work item of the IETF ECRIT
      working group, with mailing list address <ecrit@ietf.org>.

      Change controller: The IESG <ietf@ietf.org>

9.4.3.  MIME Content-type Registration for 'application/
        emergencyCall.DevInfo+xml'

   This specification requests the registration of a new MIME type
   according to the procedures of RFC 4288 [RFC4288] and guidelines in
   RFC 3023 [RFC3023].

      MIME media type name: application

      MIME subtype name: emergencyCall.DevInfo+xml

      Mandatory parameters: none

      Optional parameters: charset

      Indicates the character encoding of enclosed XML.

      Encoding considerations:

      Uses XML, which can employ 8-bit characters, depending on the
      character encoding used.  See Section 3.2 of RFC 3023 [RFC3023].

      Security considerations:

      This content type is designed to carry the device information
      information, which is a sub-category of additional data about an
      emergency call.



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      Since this data contains personal information appropriate
      precautions have to be taken to limit unauthorized access,
      inappropriate disclosure to third parties, and eavesdropping of
      this information.  Please refer to Section 7 and Section 8 for
      more information.

      Interoperability considerations: None

      Published specification: [TBD: This specification]

      Applications which use this media type: Emergency Services

      Additional information:

      Magic Number: None

      File Extension: .xml

      Macintosh file type code: 'TEXT'


      Person and email address for further information: Hannes
      Tschofenig, Hannes.Tschofenig@gmx.net

      Intended usage: LIMITED USE

      Author: This specification is a work item of the IETF ECRIT
      working group, with mailing list address <ecrit@ietf.org>.

      Change controller: The IESG <ietf@ietf.org>

9.4.4.  MIME Content-type Registration for 'application/
        emergencyCall.SubInfo+xml'

   This specification requests the registration of a new MIME type
   according to the procedures of RFC 4288 [RFC4288] and guidelines in
   RFC 3023 [RFC3023].

      MIME media type name: application

      MIME subtype name: emergencyCall.SubInfo+xml

      Mandatory parameters: none

      Optional parameters: charset

      Indicates the character encoding of enclosed XML.




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      Encoding considerations:

      Uses XML, which can employ 8-bit characters, depending on the
      character encoding used.  See Section 3.2 of RFC 3023 [RFC3023].

      Security considerations:

      This content type is designed to carry owner/subscriber
      information, which is a sub-category of additional data about an
      emergency call.

      Since this data contains personal information appropriate
      precautions have to be taken to limit unauthorized access,
      inappropriate disclosure to third parties, and eavesdropping of
      this information.  Please refer to Section 7 and Section 8 for
      more information.

      Interoperability considerations: None

      Published specification: [TBD: This specification]

      Applications which use this media type: Emergency Services

      Additional information:

      Magic Number: None

      File Extension: .xml

      Macintosh file type code: 'TEXT'


      Person and email address for further information: Hannes
      Tschofenig, Hannes.Tschofenig@gmx.net

      Intended usage: LIMITED USE

      Author: This specification is a work item of the IETF ECRIT
      working group, with mailing list address <ecrit@ietf.org>.

      Change controller: The IESG <ietf@ietf.org>










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9.4.5.  MIME Content-type Registration for 'application/
        emergencyCall.Comment+xml'

   This specification requests the registration of a new MIME type
   according to the procedures of RFC 4288 [RFC4288] and guidelines in
   RFC 3023 [RFC3023].

      MIME media type name: application

      MIME subtype name: emergencyCall.Comment+xml

      Mandatory parameters: none

      Optional parameters: charset

      Indicates the character encoding of enclosed XML.

      Encoding considerations:

      Uses XML, which can employ 8-bit characters, depending on the
      character encoding used.  See Section 3.2 of RFC 3023 [RFC3023].

      Security considerations:

      This content type is designed to carry a comment, which is a sub-
      category of additional data about an emergency call.

      This data may contain personal information.  Appropriate
      precautions may have to be taken to limit unauthorized access,
      inappropriate disclosure to third parties, and eavesdropping of
      this information.  Please refer to Section 7 and Section 8 for
      more information.

      Interoperability considerations: None

      Published specification: [TBD: This specification]

      Applications which use this media type: Emergency Services

      Additional information:

      Magic Number: None

      File Extension: .xml

      Macintosh file type code: 'TEXT'





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      Person and email address for further information: Hannes
      Tschofenig, Hannes.Tschofenig@gmx.net

      Intended usage: LIMITED USE

      Author: This specification is a work item of the IETF ECRIT
      working group, with mailing list address <ecrit@ietf.org>.

      Change controller: The IESG <ietf@ietf.org>

9.5.  URN Sub-Namespace Registration

9.5.1.  Registration for urn:ietf:params:xml:ns:emergencyCallAddlData

   This section registers a new XML namespace, as per the guidelines in
   RFC 3688 [RFC3688].

   URI:  urn:ietf:params:xml:ns:emergencyCallAddlData

   Registrant Contact:  IETF, ECRIT working group, <ecrit@ietf.org>, as
      delegated by the IESG <iesg@ietf.org>.

   XML:


      BEGIN
      <?xml version="1.0"?>
      <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.0//EN"
        "http://www.w3.org/TR/xhtml-basic/xhtml-basic10.dtd">
      <html xmlns="http://www.w3.org/1999/xhtml">
      <head>
        <meta http-equiv="content-type"
              content="text/html;charset=iso-8859-1"/>
        <title>Namespace for Additional Emergency Call Data</title>
      </head>
      <body>
        <h1>Namespace for Additional Data related to an Emergency Call</h1>
      <p>See [TBD: This document].</p>
      </body>
      </html>
      END



9.5.2.  Registration for
        urn:ietf:params:xml:ns:emergencyCallProviderInfo





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   This section registers a new XML namespace, as per the guidelines in
   RFC 3688 [RFC3688].

   URI:  urn:ietf:params:xml:ns:emergencyCallProviderInfo

   Registrant Contact:  IETF, ECRIT working group, <ecrit@ietf.org>, as
      delegated by the IESG <iesg@ietf.org>.

   XML:


      BEGIN
      <?xml version="1.0"?>
      <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.0//EN"
        "http://www.w3.org/TR/xhtml-basic/xhtml-basic10.dtd">
      <html xmlns="http://www.w3.org/1999/xhtml">
      <head>
        <meta http-equiv="content-type"
              content="text/html;charset=iso-8859-1"/>
        <title>Namespace for Additional Emergency Call Data:
               Data Provider Information</title>
      </head>
      <body>
        <h1>Namespace for Additional Data related to an Emergency Call</h1>
        <h2>Data Provider Information</h2>
      <p>See [TBD: This document].</p>
      </body>
      </html>
      END



9.5.3.  Registration for urn:ietf:params:xml:ns:emergencyCall.SvcInfo

   This section registers a new XML namespace, as per the guidelines in
   RFC 3688 [RFC3688].

   URI:  urn:ietf:params:xml:ns:emergencyCall.SvcInfo

   Registrant Contact:  IETF, ECRIT working group, <ecrit@ietf.org>, as
      delegated by the IESG <iesg@ietf.org>.

   XML:


      BEGIN
      <?xml version="1.0"?>
      <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.0//EN"



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        "http://www.w3.org/TR/xhtml-basic/xhtml-basic10.dtd">
      <html xmlns="http://www.w3.org/1999/xhtml">
      <head>
        <meta http-equiv="content-type"
              content="text/html;charset=iso-8859-1"/>
        <title>Namespace for Additional Emergency Call Data:
               Service Information</title>
      </head>
      <body>
        <h1>Namespace for Additional Data related to an Emergency Call</h1>
        <h2>Service Information</h2>
      <p>See [TBD: This document].</p>
      </body>
      </html>
      END



9.5.4.  Registration for urn:ietf:params:xml:ns:emergencyCall.DevInfo

   This section registers a new XML namespace, as per the guidelines in
   RFC 3688 [RFC3688].

   URI:  urn:ietf:params:xml:ns:emergencyCall.DevInfo

   Registrant Contact:  IETF, ECRIT working group, <ecrit@ietf.org>, as
      delegated by the IESG <iesg@ietf.org>.

   XML:


      BEGIN
      <?xml version="1.0"?>
      <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.0//EN"
        "http://www.w3.org/TR/xhtml-basic/xhtml-basic10.dtd">
      <html xmlns="http://www.w3.org/1999/xhtml">
      <head>
        <meta http-equiv="content-type"
              content="text/html;charset=iso-8859-1"/>
        <title>Namespace for Additional Emergency Call Data:
               Device Information</title>
      </head>
      <body>
        <h1>Namespace for Additional Data related to an Emergency Call</h1>
        <h2>Device Information</h2>
      <p>See [TBD: This document].</p>
      </body>
      </html>



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      END



9.5.5.  Registration for urn:ietf:params:xml:ns:emergencyCall.SubInfo

   This section registers a new XML namespace, as per the guidelines in
   RFC 3688 [RFC3688].

   URI:  urn:ietf:params:xml:ns:emergencyCall.SubInfo

   Registrant Contact:  IETF, ECRIT working group, <ecrit@ietf.org>, as
      delegated by the IESG <iesg@ietf.org>.

   XML:


      BEGIN
      <?xml version="1.0"?>
      <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.0//EN"
        "http://www.w3.org/TR/xhtml-basic/xhtml-basic10.dtd">
      <html xmlns="http://www.w3.org/1999/xhtml">
      <head>
        <meta http-equiv="content-type"
              content="text/html;charset=iso-8859-1"/>
        <title>Namespace for Additional Emergency Call Data:
               Owner/Subscriber Information</title>
      </head>
      <body>
        <h1>Namespace for Additional Data related to an Emergency Call</h1>
        <h2> Owner/Subscriber Information</h2>
      <p>See [TBD: This document].</p>
      </body>
      </html>
      END



9.5.6.  Registration for urn:ietf:params:xml:ns:emergencyCall.Comment

   This section registers a new XML namespace, as per the guidelines in
   RFC 3688 [RFC3688].

   URI:  urn:ietf:params:xml:ns:emergencyCall.Comment

   Registrant Contact:  IETF, ECRIT working group, <ecrit@ietf.org>, as
      delegated by the IESG <iesg@ietf.org>.




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   XML:


      BEGIN
      <?xml version="1.0"?>
      <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.0//EN"
        "http://www.w3.org/TR/xhtml-basic/xhtml-basic10.dtd">
      <html xmlns="http://www.w3.org/1999/xhtml">
      <head>
        <meta http-equiv="content-type"
              content="text/html;charset=iso-8859-1"/>
        <title>Namespace for Additional Emergency Call Data:Comment</title>
      </head>
      <body>
        <h1>Namespace for Additional Data related to an Emergency Call</h1>
        <h2> Comment</h2>
      <p>See [TBD: This document].</p>
      </body>
      </html>
      END



9.6.  Schema Registrations

   This specification registers five schemas, as per the guidelines in
   RFC 3688 [RFC3688].

      URI: urn:ietf:params:xml:schema:additional-
      data:emergencyCallProviderInfo

      Registrant Contact: IETF, ECRIT Working Group (ecrit@ietf.org), as
      delegated by the IESG (iesg@ietf.org).

      XML: The XML schema can be found in Figure 13.

      URI: urn:ietf:params:xml:schema:additional-data:addCallSvcInfo

      Registrant Contact: IETF, ECRIT Working Group (ectit@ietf.org), as
      delegated by the IESG (iesg@ietf.org).

      XML: The XML schema can be found in Figure 14.

      URI: urn:ietf:params:xml:schema:additional-
      data:emergencyCallDevInfo

      Registrant Contact: IETF, ECRIT Working Group (ecrit@ietf.org), as
      delegated by the IESG (iesg@ietf.org).



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      XML: The XML schema can be found in Figure 15.

      URI: urn:ietf:params:xml:schema:additional-
      data:emergencyCall.SubInfo

      Registrant Contact: IETF, ECRIT Working Group (ecrit@ietf.org), as
      delegated by the IESG (iesg@ietf.org).

      XML: The XML schema can be found in Section 6.4.

      URI: urn:ietf:params:xml:schema:additional-
      data:emergencyCall.Comment

      Registrant Contact: IETF, ECRIT Working Group (ecrit@ietf.org), as
      delegated by the IESG (iesg@ietf.org).

      XML: The XML schema can be found in Section 6.5.

9.7.  VCard Parameter Value Registration

   This document registers a new value in the vCARD Parameter Values
   registry as defined by [RFC6350] with the following template:

   Value:  main

   Purpose:  The main telephone number, typically of an enterprise, as
      opposed to a direct dial number of an individual employee

   Conformance:  This value can be used with the "TYPE" parameter
      applied on the "TEL" property.

   Example(s):  TEL;VALUE=uri;TYPE="main,voice";PREF=1:tel:+1-418-656-90
      00

10.  Acknowledgments

   This work was originally started in NENA and has benefitted from a
   large number of participants in NENA standardization efforts,
   originally in the Long Term Definition Working Group, the Data
   Technical Committee and most recently the Additional Data working
   group.  The authors are grateful for the initial work and extended
   comments provided by many NENA participants, including Delaine
   Arnold, Marc Berryman, Guy Caron, Mark Fletcher, Brian Dupras, James
   Leyerle, Kathy McMahon, Christian, Militeau, Ira Pyles, Matt Serra,
   and Robert (Bob) Sherry.






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   We would also like to thank James Winterbottom, Paul Kyzivat, Gunnar
   Hellstrom, Martin Thomson, Keith Drage, and Laura Liess for their
   review comments.

11.  References

11.1.  Normative References

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119, March 1997.

   [RFC2392]  Levinson, E., "Content-ID and Message-ID Uniform Resource
              Locators", RFC 2392, August 1998.

   [RFC3023]  Murata, M., St. Laurent, S., and D. Kohn, "XML Media
              Types", RFC 3023, January 2001.

   [RFC3261]  Rosenberg, J., Schulzrinne, H., Camarillo, G., Johnston,
              A., Peterson, J., Sparks, R., Handley, M., and E.
              Schooler, "SIP: Session Initiation Protocol", RFC 3261,
              June 2002.

   [RFC3688]  Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
              January 2004.

   [RFC4119]  Peterson, J., "A Presence-based GEOPRIV Location Object
              Format", RFC 4119, December 2005.

   [RFC4288]  Freed, N. and J. Klensin, "Media Type Specifications and
              Registration Procedures", RFC 4288, December 2005.

   [RFC5226]  Narten, T. and H. Alvestrand, "Guidelines for Writing an
              IANA Considerations Section in RFCs", BCP 26, RFC 5226,
              May 2008.

   [RFC6350]  Perreault, S., "vCard Format Specification", RFC 6350,
              August 2011.

   [RFC6351]  Perreault, S., "xCard: vCard XML Representation", RFC
              6351, August 2011.

11.2.  Informational References

   [I-D.iab-privacy-considerations]
              Cooper, A., Tschofenig, H., Aboba, B., Peterson, J.,
              Morris, J., Hansen, M., and R. Smith, "Privacy
              Considerations for Internet Protocols", draft-iab-privacy-
              considerations-03 (work in progress), July 2012.



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   [RFC5012]  Schulzrinne, H. and R. Marshall, "Requirements for
              Emergency Context Resolution with Internet Technologies",
              RFC 5012, January 2008.

   [RFC5222]  Hardie, T., Newton, A., Schulzrinne, H., and H.
              Tschofenig, "LoST: A Location-to-Service Translation
              Protocol", RFC 5222, August 2008.

   [RFC5985]  Barnes, M., "HTTP-Enabled Location Delivery (HELD)", RFC
              5985, September 2010.

   [RFC6443]  Rosen, B., Schulzrinne, H., Polk, J., and A. Newton,
              "Framework for Emergency Calling Using Internet
              Multimedia", RFC 6443, December 2011.

   [RFC6881]  Rosen, B. and J. Polk, "Best Current Practice for
              Communications Services in Support of Emergency Calling",
              BCP 181, RFC 6881, March 2013.

Appendix A.  XML Schema for vCard/xCard

   This section contains the vCard/xCard XML schema version of the Relax
   NG schema defined in RFC 6351 [RFC6351] for simplified use with the
   XML schemas defined in this document.  The schema in RFC 6351
   [RFC6351] is the normative source and this section is informative
   only.


   <?xml version="1.0" encoding="UTF-8"?>
   <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
   elementFormDefault="qualified"
   targetNamespace="urn:ietf:params:xml:ns:vcard-4.0"
   xmlns:ns1="urn:ietf:params:xml:ns:vcard-4.0">
     <!--

       3.3
       iana-token = xsd:string { pattern = "[a-zA-Z0-9-]+" }
       x-name = xsd:string { pattern = "x-[a-zA-Z0-9-]+" }
     -->
     <xs:simpleType name="iana-token">
       <xs:annotation>
         <xs:documentation>vCard Format Specification
         </xs:documentation>
       </xs:annotation>
       <xs:restriction base="xs:string"/>
     </xs:simpleType>
     <xs:simpleType name="x-name">
       <xs:restriction base="xs:string"/>



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     </xs:simpleType>
     <!--

       4.1
     -->
     <xs:element name="text" type="xs:string"/>
     <xs:group name="value-text-list">
       <xs:sequence>
         <xs:element maxOccurs="unbounded" ref="ns1:text"/>
       </xs:sequence>
     </xs:group>
     <!-- 4.2 -->
     <xs:element name="uri" type="xs:anyURI"/>
     <!-- 4.3.1 -->
     <xs:element name="date"
     substitutionGroup="ns1:value-date-and-or-time">
       <xs:simpleType>
         <xs:restriction base="xs:string">
           <xs:pattern value="\d{8}|\d{4}-\d\d|
           --\d\d(\d\d)?|---\d\d"/>
         </xs:restriction>
       </xs:simpleType>
     </xs:element>
     <!-- 4.3.2 -->
     <xs:element name="time"
     substitutionGroup="ns1:value-date-and-or-time">
       <xs:simpleType>
         <xs:restriction base="xs:string">
           <xs:pattern value="(\d\d(\d\d(\d\d)?)?|-\d\d(\d\d?)|--\d\d)
           (Z|[+\-]\d\d(\d\d)?)?"/>
         </xs:restriction>
       </xs:simpleType>
     </xs:element>
     <!-- 4.3.3 -->
     <xs:element name="date-time"
     substitutionGroup="ns1:value-date-and-or-time">
       <xs:simpleType>
         <xs:restriction base="xs:string">
           <xs:pattern value=
           "(\d{8}|--\d{4}|---\d\d)T
           \d\d(\d\d(\d\d)?)?(Z|[+\-]\d\d(\d\d)?)?"/>
         </xs:restriction>
       </xs:simpleType>
     </xs:element>
     <!-- 4.3.4 -->
     <xs:element name="value-date-and-or-time" abstract="true"/>
     <!-- 4.3.5 -->
     <xs:complexType name="value-timestamp">



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       <xs:sequence>
         <xs:element ref="ns1:timestamp"/>
       </xs:sequence>
     </xs:complexType>
     <xs:element name="timestamp">
       <xs:simpleType>
         <xs:restriction base="xs:string">
           <xs:pattern value="\d{8}T\d{6}(Z|[+\-]\d\d(\d\d)?)?"/>
         </xs:restriction>
       </xs:simpleType>
     </xs:element>
     <!-- 4.4 -->
     <xs:element name="boolean" type="xs:boolean"/>
     <!-- 4.5 -->
     <xs:element name="integer" type="xs:integer"/>
     <!-- 4.6 -->
     <xs:element name="float" type="xs:float"/>
     <!-- 4.7 -->
     <xs:element name="utc-offset">
       <xs:simpleType>
         <xs:restriction base="xs:string">
           <xs:pattern value="[+\-]\d\d(\d\d)?"/>
         </xs:restriction>
       </xs:simpleType>
     </xs:element>
     <!-- 4.8 -->
     <xs:element name="language-tag">
       <xs:simpleType>
         <xs:restriction base="xs:string">
           <xs:pattern
           value="([a-z]{2,3}((-[a-z]{3}){0,3})?|[a-z]{4,8})
           (-[a-z]{4})?(-([a-z]{2}|\d{3}))?(-([0-9a-z]{5,8}|
           \d[0-9a-z]{3}))*(-[0-9a-wyz](-[0-9a-z]{2,8})+)*
           (-x(-[0-9a-z]{1,8})+)?|x(-[0-9a-z]{1,8})+|[a-z]{1,3}
           (-[0-9a-z]{2,8}){1,2}"/>
         </xs:restriction>
       </xs:simpleType>
     </xs:element>
     <!--

       5.1
     -->
     <xs:group name="param-language">
       <xs:annotation>
         <xs:documentation>Section 5: Parameters</xs:documentation>
       </xs:annotation>
       <xs:sequence>
         <xs:element minOccurs="0" ref="ns1:language"/>



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       </xs:sequence>
     </xs:group>
     <xs:element name="language">
       <xs:complexType>
         <xs:sequence>
           <xs:element ref="ns1:language-tag"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 5.2 -->
     <xs:group name="param-pref">
       <xs:sequence>
         <xs:element minOccurs="0" ref="ns1:pref"/>
       </xs:sequence>
     </xs:group>
     <xs:element name="pref">
       <xs:complexType>
         <xs:sequence>
           <xs:element name="integer">
             <xs:simpleType>
               <xs:restriction base="xs:integer">
                 <xs:minInclusive value="1"/>
                 <xs:maxInclusive value="100"/>
               </xs:restriction>
             </xs:simpleType>
           </xs:element>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 5.4 -->
     <xs:group name="param-altid">
       <xs:sequence>
         <xs:element minOccurs="0" ref="ns1:altid"/>
       </xs:sequence>
     </xs:group>
     <xs:element name="altid">
       <xs:complexType>
         <xs:sequence>
           <xs:element ref="ns1:text"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 5.5 -->
     <xs:group name="param-pid">
       <xs:sequence>
         <xs:element minOccurs="0" ref="ns1:pid"/>
       </xs:sequence>
     </xs:group>



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     <xs:element name="pid">
       <xs:complexType>
         <xs:sequence>
           <xs:element maxOccurs="unbounded" name="text">
             <xs:simpleType>
               <xs:restriction base="xs:string">
                 <xs:pattern value="\d+(\.\d+)?"/>
               </xs:restriction>
             </xs:simpleType>
           </xs:element>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 5.6 -->
     <xs:group name="param-type">
       <xs:sequence>
         <xs:element minOccurs="0" ref="ns1:type"/>
       </xs:sequence>
     </xs:group>
     <xs:element name="type">
       <xs:complexType>
         <xs:sequence>
           <xs:element maxOccurs="unbounded" name="text">
             <xs:simpleType>
               <xs:restriction base="xs:token">
                 <xs:enumeration value="work"/>
                 <xs:enumeration value="home"/>
               </xs:restriction>
             </xs:simpleType>
           </xs:element>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 5.7 -->
     <xs:group name="param-mediatype">
       <xs:sequence>
         <xs:element minOccurs="0" ref="ns1:mediatype"/>
       </xs:sequence>
     </xs:group>
     <xs:element name="mediatype">
       <xs:complexType>
         <xs:sequence>
           <xs:element ref="ns1:text"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 5.8 -->
     <xs:group name="param-calscale">



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       <xs:sequence>
         <xs:element minOccurs="0" ref="ns1:calscale"/>
       </xs:sequence>
     </xs:group>
     <xs:element name="calscale">
       <xs:complexType>
         <xs:sequence>
           <xs:element name="text">
             <xs:simpleType>
               <xs:restriction base="xs:token">
                 <xs:enumeration value="gregorian"/>
               </xs:restriction>
             </xs:simpleType>
           </xs:element>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 5.9 -->
     <xs:group name="param-sort-as">
       <xs:sequence>
         <xs:element minOccurs="0" ref="ns1:sort-as"/>
       </xs:sequence>
     </xs:group>
     <xs:element name="sort-as">
       <xs:complexType>
         <xs:sequence>
           <xs:element maxOccurs="unbounded" ref="ns1:text"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 5.10 -->
     <xs:group name="param-geo">
       <xs:sequence>
         <xs:element minOccurs="0" name="geo">
           <xs:complexType>
             <xs:sequence>
               <xs:element ref="ns1:uri"/>
             </xs:sequence>
           </xs:complexType>
         </xs:element>
       </xs:sequence>
     </xs:group>
     <!-- 5.11 -->
     <xs:group name="param-tz">
       <xs:sequence>
         <xs:element minOccurs="0" name="tz">
           <xs:complexType>
             <xs:choice>



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               <xs:element ref="ns1:text"/>
               <xs:element ref="ns1:uri"/>
             </xs:choice>
           </xs:complexType>
         </xs:element>
       </xs:sequence>
     </xs:group>
     <!--

       6.1.3
     -->
     <xs:element name="source">
       <xs:complexType>
         <xs:sequence>
           <xs:element name="parameters">
             <xs:complexType>
               <xs:sequence>
                 <xs:group ref="ns1:param-altid"/>
                 <xs:group ref="ns1:param-pid"/>
                 <xs:group ref="ns1:param-pref"/>
                 <xs:group ref="ns1:param-mediatype"/>
               </xs:sequence>
             </xs:complexType>
           </xs:element>
           <xs:element ref="ns1:uri"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 6.1.4 -->
     <xs:element name="kind">
       <xs:complexType>
         <xs:sequence>
           <xs:element minOccurs="0" maxOccurs="unbounded" name="text">
             <xs:simpleType>
               <xs:union memberTypes="ns1:x-name ns1:iana-token">
                 <xs:simpleType>
                   <xs:restriction base="xs:token">
                     <xs:enumeration value="individual"/>
                   </xs:restriction>
                 </xs:simpleType>
                 <xs:simpleType>
                   <xs:restriction base="xs:token">
                     <xs:enumeration value="group"/>
                   </xs:restriction>
                 </xs:simpleType>
                 <xs:simpleType>
                   <xs:restriction base="xs:token">
                     <xs:enumeration value="org"/>



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                   </xs:restriction>
                 </xs:simpleType>
                 <xs:simpleType>
                   <xs:restriction base="xs:token">
                     <xs:enumeration value="location"/>
                   </xs:restriction>
                 </xs:simpleType>
               </xs:union>
             </xs:simpleType>
           </xs:element>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 6.2.1 -->
     <xs:element name="fn">
       <xs:complexType>
         <xs:sequence>
           <xs:element minOccurs="0" name="parameters">
             <xs:complexType>
               <xs:sequence>
                 <xs:group ref="ns1:param-language"/>
                 <xs:group ref="ns1:param-altid"/>
                 <xs:group ref="ns1:param-pid"/>
                 <xs:group ref="ns1:param-pref"/>
                 <xs:group ref="ns1:param-type"/>
               </xs:sequence>
             </xs:complexType>
           </xs:element>
           <xs:element ref="ns1:text"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 6.2.2 -->
     <xs:element name="n">
       <xs:complexType>
         <xs:sequence>
           <xs:element minOccurs="0" name="parameters">
             <xs:complexType>
               <xs:sequence>
                 <xs:group ref="ns1:param-language"/>
                 <xs:group ref="ns1:param-sort-as"/>
                 <xs:group ref="ns1:param-altid"/>
               </xs:sequence>
             </xs:complexType>
           </xs:element>
           <xs:element maxOccurs="unbounded" ref="ns1:surname"/>
           <xs:element maxOccurs="unbounded" ref="ns1:given"/>
           <xs:element maxOccurs="unbounded" ref="ns1:additional"/>



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           <xs:element maxOccurs="unbounded" ref="ns1:prefix"/>
           <xs:element maxOccurs="unbounded" ref="ns1:suffix"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <xs:element name="surname" type="xs:string"/>
     <xs:element name="given" type="xs:string"/>
     <xs:element name="additional" type="xs:string"/>
     <xs:element name="prefix" type="xs:string"/>
     <xs:element name="suffix" type="xs:string"/>
     <!-- 6.2.3 -->
     <xs:element name="nickname">
       <xs:complexType>
         <xs:sequence>
           <xs:element minOccurs="0" name="parameters">
             <xs:complexType>
               <xs:sequence>
                 <xs:group ref="ns1:param-language"/>
                 <xs:group ref="ns1:param-altid"/>
                 <xs:group ref="ns1:param-pid"/>
                 <xs:group ref="ns1:param-pref"/>
                 <xs:group ref="ns1:param-type"/>
               </xs:sequence>
             </xs:complexType>
           </xs:element>
           <xs:group ref="ns1:value-text-list"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 6.2.4 -->
     <xs:element name="photo">
       <xs:complexType>
         <xs:sequence>
           <xs:element minOccurs="0" name="parameters">
             <xs:complexType>
               <xs:sequence>
                 <xs:group ref="ns1:param-altid"/>
                 <xs:group ref="ns1:param-pid"/>
                 <xs:group ref="ns1:param-pref"/>
                 <xs:group ref="ns1:param-type"/>
                 <xs:group ref="ns1:param-mediatype"/>
               </xs:sequence>
             </xs:complexType>
           </xs:element>
           <xs:element ref="ns1:uri"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>



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     <!-- 6.2.5 -->
     <xs:element name="bday">
       <xs:complexType>
         <xs:sequence>
           <xs:element minOccurs="0" name="parameters">
             <xs:complexType>
               <xs:sequence>
                 <xs:group ref="ns1:param-altid"/>
                 <xs:group ref="ns1:param-calscale"/>
               </xs:sequence>
             </xs:complexType>
           </xs:element>
           <xs:choice>
             <xs:element ref="ns1:value-date-and-or-time"/>
             <xs:element ref="ns1:text"/>
           </xs:choice>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 6.2.6 -->
     <xs:element name="anniversary">
       <xs:complexType>
         <xs:sequence>
           <xs:element minOccurs="0" name="parameters">
             <xs:complexType>
               <xs:sequence>
                 <xs:group ref="ns1:param-altid"/>
                 <xs:group ref="ns1:param-calscale"/>
               </xs:sequence>
             </xs:complexType>
           </xs:element>
           <xs:choice>
             <xs:element ref="ns1:value-date-and-or-time"/>
             <xs:element ref="ns1:text"/>
           </xs:choice>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 6.2.7 -->
     <xs:element name="gender">
       <xs:complexType>
         <xs:sequence>
           <xs:element ref="ns1:sex"/>
           <xs:element minOccurs="0" ref="ns1:identity"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <xs:element name="sex">



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       <xs:simpleType>
         <xs:restriction base="xs:token">
           <xs:enumeration value=""/>
           <xs:enumeration value="M"/>
           <xs:enumeration value="F"/>
           <xs:enumeration value="O"/>
           <xs:enumeration value="N"/>
           <xs:enumeration value="U"/>
         </xs:restriction>
       </xs:simpleType>
     </xs:element>
     <xs:element name="identity" type="xs:string"/>
     <!-- 6.3.1 -->
     <xs:group name="param-label">
       <xs:sequence>
         <xs:element minOccurs="0" ref="ns1:label"/>
       </xs:sequence>
     </xs:group>
     <xs:element name="label">
       <xs:complexType>
         <xs:sequence>
           <xs:element ref="ns1:text"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <xs:element name="adr">
       <xs:complexType>
         <xs:sequence>
           <xs:element minOccurs="0" name="parameters">
             <xs:complexType>
               <xs:sequence>
                 <xs:group ref="ns1:param-language"/>
                 <xs:group ref="ns1:param-altid"/>
                 <xs:group ref="ns1:param-pid"/>
                 <xs:group ref="ns1:param-pref"/>
                 <xs:group ref="ns1:param-type"/>
                 <xs:group ref="ns1:param-geo"/>
                 <xs:group ref="ns1:param-tz"/>
                 <xs:group ref="ns1:param-label"/>
               </xs:sequence>
             </xs:complexType>
           </xs:element>
           <xs:element maxOccurs="unbounded" ref="ns1:pobox"/>
           <xs:element maxOccurs="unbounded" ref="ns1:ext"/>
           <xs:element maxOccurs="unbounded" ref="ns1:street"/>
           <xs:element maxOccurs="unbounded" ref="ns1:locality"/>
           <xs:element maxOccurs="unbounded" ref="ns1:region"/>
           <xs:element maxOccurs="unbounded" ref="ns1:code"/>



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           <xs:element maxOccurs="unbounded" ref="ns1:country"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <xs:element name="pobox" type="xs:string"/>
     <xs:element name="ext" type="xs:string"/>
     <xs:element name="street" type="xs:string"/>
     <xs:element name="locality" type="xs:string"/>
     <xs:element name="region" type="xs:string"/>
     <xs:element name="code" type="xs:string"/>
     <xs:element name="country" type="xs:string"/>
     <!-- 6.4.1 -->
     <xs:element name="tel">
       <xs:complexType>
         <xs:sequence>
           <xs:element minOccurs="0" name="parameters">
             <xs:complexType>
               <xs:sequence>
                 <xs:group ref="ns1:param-altid"/>
                 <xs:group ref="ns1:param-pid"/>
                 <xs:group ref="ns1:param-pref"/>
                 <xs:element minOccurs="0" name="type">
                   <xs:complexType>
                     <xs:sequence>
                       <xs:element maxOccurs="unbounded" name="text">
                         <xs:simpleType>
                           <xs:restriction base="xs:token">
                             <xs:enumeration value="work"/>
                             <xs:enumeration value="home"/>
                             <xs:enumeration value="text"/>
                             <xs:enumeration value="voice"/>
                             <xs:enumeration value="fax"/>
                             <xs:enumeration value="cell"/>
                             <xs:enumeration value="video"/>
                             <xs:enumeration value="pager"/>
                             <xs:enumeration value="textphone"/>
                           </xs:restriction>
                         </xs:simpleType>
                       </xs:element>
                     </xs:sequence>
                   </xs:complexType>
                 </xs:element>
                 <xs:group ref="ns1:param-mediatype"/>
               </xs:sequence>
             </xs:complexType>
           </xs:element>
           <xs:choice>
             <xs:element ref="ns1:text"/>



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             <xs:element ref="ns1:uri"/>
           </xs:choice>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 6.4.2 -->
     <xs:element name="email">
       <xs:complexType>
         <xs:sequence>
           <xs:element minOccurs="0" name="parameters">
             <xs:complexType>
               <xs:sequence>
                 <xs:group ref="ns1:param-altid"/>
                 <xs:group ref="ns1:param-pid"/>
                 <xs:group ref="ns1:param-pref"/>
                 <xs:group ref="ns1:param-type"/>
               </xs:sequence>
             </xs:complexType>
           </xs:element>
           <xs:element ref="ns1:text"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 6.4.3 -->
     <xs:element name="impp">
       <xs:complexType>
         <xs:sequence>
           <xs:element minOccurs="0" name="parameters">
             <xs:complexType>
               <xs:sequence>
                 <xs:group ref="ns1:param-altid"/>
                 <xs:group ref="ns1:param-pid"/>
                 <xs:group ref="ns1:param-pref"/>
                 <xs:group ref="ns1:param-type"/>
                 <xs:group ref="ns1:param-mediatype"/>
               </xs:sequence>
             </xs:complexType>
           </xs:element>
           <xs:element ref="ns1:uri"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 6.4.4 -->
     <xs:element name="lang">
       <xs:complexType>
         <xs:sequence>
           <xs:element minOccurs="0" name="parameters">
             <xs:complexType>



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               <xs:sequence>
                 <xs:group ref="ns1:param-altid"/>
                 <xs:group ref="ns1:param-pid"/>
                 <xs:group ref="ns1:param-pref"/>
                 <xs:group ref="ns1:param-type"/>
               </xs:sequence>
             </xs:complexType>
           </xs:element>
           <xs:element ref="ns1:language-tag"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 6.5.1 -->
     <xs:group name="property-tz">
       <xs:sequence>
         <xs:element name="tz">
           <xs:complexType>
             <xs:sequence>
               <xs:element minOccurs="0" name="parameters">
                 <xs:complexType>
                   <xs:sequence>
                     <xs:group ref="ns1:param-altid"/>
                     <xs:group ref="ns1:param-pid"/>
                     <xs:group ref="ns1:param-pref"/>
                     <xs:group ref="ns1:param-type"/>
                     <xs:group ref="ns1:param-mediatype"/>
                   </xs:sequence>
                 </xs:complexType>
               </xs:element>
               <xs:choice>
                 <xs:element ref="ns1:text"/>
                 <xs:element ref="ns1:uri"/>
                 <xs:element ref="ns1:utc-offset"/>
               </xs:choice>
             </xs:sequence>
           </xs:complexType>
         </xs:element>
       </xs:sequence>
     </xs:group>
     <!-- 6.5.2 -->
     <xs:group name="property-geo">
       <xs:sequence>
         <xs:element name="geo">
           <xs:complexType>
             <xs:sequence>
               <xs:element minOccurs="0" name="parameters">
                 <xs:complexType>
                   <xs:sequence>



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                     <xs:group ref="ns1:param-altid"/>
                     <xs:group ref="ns1:param-pid"/>
                     <xs:group ref="ns1:param-pref"/>
                     <xs:group ref="ns1:param-type"/>
                     <xs:group ref="ns1:param-mediatype"/>
                   </xs:sequence>
                 </xs:complexType>
               </xs:element>
               <xs:element ref="ns1:uri"/>
             </xs:sequence>
           </xs:complexType>
         </xs:element>
       </xs:sequence>
     </xs:group>
     <!-- 6.6.1 -->
     <xs:element name="title">
       <xs:complexType>
         <xs:sequence>
           <xs:element minOccurs="0" name="parameters">
             <xs:complexType>
               <xs:sequence>
                 <xs:group ref="ns1:param-language"/>
                 <xs:group ref="ns1:param-altid"/>
                 <xs:group ref="ns1:param-pid"/>
                 <xs:group ref="ns1:param-pref"/>
                 <xs:group ref="ns1:param-type"/>
               </xs:sequence>
             </xs:complexType>
           </xs:element>
           <xs:element ref="ns1:text"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 6.6.2 -->
     <xs:element name="role">
       <xs:complexType>
         <xs:sequence>
           <xs:element minOccurs="0" name="parameters">
             <xs:complexType>
               <xs:sequence>
                 <xs:group ref="ns1:param-language"/>
                 <xs:group ref="ns1:param-altid"/>
                 <xs:group ref="ns1:param-pid"/>
                 <xs:group ref="ns1:param-pref"/>
                 <xs:group ref="ns1:param-type"/>
               </xs:sequence>
             </xs:complexType>
           </xs:element>



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           <xs:element ref="ns1:text"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 6.6.3 -->
     <xs:element name="logo">
       <xs:complexType>
         <xs:sequence>
           <xs:element minOccurs="0" name="parameters">
             <xs:complexType>
               <xs:sequence>
                 <xs:group ref="ns1:param-language"/>
                 <xs:group ref="ns1:param-altid"/>
                 <xs:group ref="ns1:param-pid"/>
                 <xs:group ref="ns1:param-pref"/>
                 <xs:group ref="ns1:param-type"/>
                 <xs:group ref="ns1:param-mediatype"/>
               </xs:sequence>
             </xs:complexType>
           </xs:element>
           <xs:element ref="ns1:uri"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 6.6.4 -->
     <xs:element name="org">
       <xs:complexType>
         <xs:sequence>
           <xs:element minOccurs="0" name="parameters">
             <xs:complexType>
               <xs:sequence>
                 <xs:group ref="ns1:param-language"/>
                 <xs:group ref="ns1:param-altid"/>
                 <xs:group ref="ns1:param-pid"/>
                 <xs:group ref="ns1:param-pref"/>
                 <xs:group ref="ns1:param-type"/>
                 <xs:group ref="ns1:param-sort-as"/>
               </xs:sequence>
             </xs:complexType>
           </xs:element>
           <xs:group ref="ns1:value-text-list"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 6.6.5 -->
     <xs:element name="member">
       <xs:complexType>
         <xs:sequence>



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           <xs:element minOccurs="0" name="parameters">
             <xs:complexType>
               <xs:sequence>
                 <xs:group ref="ns1:param-altid"/>
                 <xs:group ref="ns1:param-pid"/>
                 <xs:group ref="ns1:param-pref"/>
                 <xs:group ref="ns1:param-mediatype"/>
               </xs:sequence>
             </xs:complexType>
           </xs:element>
           <xs:element ref="ns1:uri"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 6.6.6 -->
     <xs:element name="related">
       <xs:complexType>
         <xs:sequence>
           <xs:element minOccurs="0" name="parameters">
             <xs:complexType>
               <xs:sequence>
                 <xs:group ref="ns1:param-altid"/>
                 <xs:group ref="ns1:param-pid"/>
                 <xs:group ref="ns1:param-pref"/>
                 <xs:element minOccurs="0" name="type">
                   <xs:complexType>
                     <xs:sequence>
                       <xs:element maxOccurs="unbounded" name="text">
                         <xs:simpleType>
                           <xs:restriction base="xs:token">
                             <xs:enumeration value="work"/>
                             <xs:enumeration value="home"/>
                             <xs:enumeration value="contact"/>
                             <xs:enumeration value="acquaintance"/>
                             <xs:enumeration value="friend"/>
                             <xs:enumeration value="met"/>
                             <xs:enumeration value="co-worker"/>
                             <xs:enumeration value="colleague"/>
                             <xs:enumeration value="co-resident"/>
                             <xs:enumeration value="neighbor"/>
                             <xs:enumeration value="child"/>
                             <xs:enumeration value="parent"/>
                             <xs:enumeration value="sibling"/>
                             <xs:enumeration value="spouse"/>
                             <xs:enumeration value="kin"/>
                             <xs:enumeration value="muse"/>
                             <xs:enumeration value="crush"/>
                             <xs:enumeration value="date"/>



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                             <xs:enumeration value="sweetheart"/>
                             <xs:enumeration value="me"/>
                             <xs:enumeration value="agent"/>
                             <xs:enumeration value="emergency"/>
                           </xs:restriction>
                         </xs:simpleType>
                       </xs:element>
                     </xs:sequence>
                   </xs:complexType>
                 </xs:element>
                 <xs:group ref="ns1:param-mediatype"/>
               </xs:sequence>
             </xs:complexType>
           </xs:element>
           <xs:choice>
             <xs:element ref="ns1:uri"/>
             <xs:element ref="ns1:text"/>
           </xs:choice>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 6.7.1 -->
     <xs:element name="categories">
       <xs:complexType>
         <xs:sequence>
           <xs:element minOccurs="0" name="parameters">
             <xs:complexType>
               <xs:sequence>
                 <xs:group ref="ns1:param-altid"/>
                 <xs:group ref="ns1:param-pid"/>
                 <xs:group ref="ns1:param-pref"/>
                 <xs:group ref="ns1:param-type"/>
               </xs:sequence>
             </xs:complexType>
           </xs:element>
           <xs:group ref="ns1:value-text-list"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 6.7.2 -->
     <xs:element name="note">
       <xs:complexType>
         <xs:sequence>
           <xs:element minOccurs="0" name="parameters">
             <xs:complexType>
               <xs:sequence>
                 <xs:group ref="ns1:param-language"/>
                 <xs:group ref="ns1:param-altid"/>



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                 <xs:group ref="ns1:param-pid"/>
                 <xs:group ref="ns1:param-pref"/>
                 <xs:group ref="ns1:param-type"/>
               </xs:sequence>
             </xs:complexType>
           </xs:element>
           <xs:element ref="ns1:text"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 6.7.3 -->
     <xs:element name="prodid">
       <xs:complexType>
         <xs:sequence>
           <xs:element ref="ns1:text"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 6.7.4 -->
     <xs:element name="rev" type="ns1:value-timestamp"/>
     <!-- 6.7.5 -->
     <xs:element name="sound">
       <xs:complexType>
         <xs:sequence>
           <xs:element minOccurs="0" name="parameters">
             <xs:complexType>
               <xs:sequence>
                 <xs:group ref="ns1:param-language"/>
                 <xs:group ref="ns1:param-altid"/>
                 <xs:group ref="ns1:param-pid"/>
                 <xs:group ref="ns1:param-pref"/>
                 <xs:group ref="ns1:param-type"/>
                 <xs:group ref="ns1:param-mediatype"/>
               </xs:sequence>
             </xs:complexType>
           </xs:element>
           <xs:element ref="ns1:uri"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 6.7.6 -->
     <xs:element name="uid">
       <xs:complexType>
         <xs:sequence>
           <xs:element ref="ns1:uri"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>



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     <!-- 6.7.7 -->
     <xs:element name="clientpidmap">
       <xs:complexType>
         <xs:sequence>
           <xs:element ref="ns1:sourceid"/>
           <xs:element ref="ns1:uri"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <xs:element name="sourceid" type="xs:positiveInteger"/>
     <!-- 6.7.8 -->
     <xs:element name="url">
       <xs:complexType>
         <xs:sequence>
           <xs:element minOccurs="0" name="parameters">
             <xs:complexType>
               <xs:sequence>
                 <xs:group ref="ns1:param-altid"/>
                 <xs:group ref="ns1:param-pid"/>
                 <xs:group ref="ns1:param-pref"/>
                 <xs:group ref="ns1:param-type"/>
                 <xs:group ref="ns1:param-mediatype"/>
               </xs:sequence>
             </xs:complexType>
           </xs:element>
           <xs:element ref="ns1:uri"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 6.8.1 -->
     <xs:element name="key">
       <xs:complexType>
         <xs:sequence>
           <xs:element minOccurs="0" name="parameters">
             <xs:complexType>
               <xs:sequence>
                 <xs:group ref="ns1:param-altid"/>
                 <xs:group ref="ns1:param-pid"/>
                 <xs:group ref="ns1:param-pref"/>
                 <xs:group ref="ns1:param-type"/>
                 <xs:group ref="ns1:param-mediatype"/>
               </xs:sequence>
             </xs:complexType>
           </xs:element>
           <xs:choice>
             <xs:element ref="ns1:uri"/>
             <xs:element ref="ns1:text"/>
           </xs:choice>



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         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 6.9.1 -->
     <xs:element name="fburl">
       <xs:complexType>
         <xs:sequence>
           <xs:element minOccurs="0" name="parameters">
             <xs:complexType>
               <xs:sequence>
                 <xs:group ref="ns1:param-altid"/>
                 <xs:group ref="ns1:param-pid"/>
                 <xs:group ref="ns1:param-pref"/>
                 <xs:group ref="ns1:param-type"/>
                 <xs:group ref="ns1:param-mediatype"/>
               </xs:sequence>
             </xs:complexType>
           </xs:element>
           <xs:element ref="ns1:uri"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 6.9.2 -->
     <xs:element name="caladruri">
       <xs:complexType>
         <xs:sequence>
           <xs:element minOccurs="0" name="parameters">
             <xs:complexType>
               <xs:sequence>
                 <xs:group ref="ns1:param-altid"/>
                 <xs:group ref="ns1:param-pid"/>
                 <xs:group ref="ns1:param-pref"/>
                 <xs:group ref="ns1:param-type"/>
                 <xs:group ref="ns1:param-mediatype"/>
               </xs:sequence>
             </xs:complexType>
           </xs:element>
           <xs:element ref="ns1:uri"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- 6.9.3 -->
     <xs:element name="caluri">
       <xs:complexType>
         <xs:sequence>
           <xs:element minOccurs="0" name="parameters">
             <xs:complexType>
               <xs:sequence>



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                 <xs:group ref="ns1:param-altid"/>
                 <xs:group ref="ns1:param-pid"/>
                 <xs:group ref="ns1:param-pref"/>
                 <xs:group ref="ns1:param-type"/>
                 <xs:group ref="ns1:param-mediatype"/>
               </xs:sequence>
             </xs:complexType>
           </xs:element>
           <xs:element ref="ns1:uri"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>
     <!-- Top-level grammar -->
     <xs:group name="property">
       <xs:choice>
         <xs:element ref="ns1:adr"/>
         <xs:element ref="ns1:anniversary"/>
         <xs:element ref="ns1:bday"/>
         <xs:element ref="ns1:caladruri"/>
         <xs:element ref="ns1:caluri"/>
         <xs:element ref="ns1:categories"/>
         <xs:element ref="ns1:clientpidmap"/>
         <xs:element ref="ns1:email"/>
         <xs:element ref="ns1:fburl"/>
         <xs:element ref="ns1:fn"/>
         <xs:group ref="ns1:property-geo"/>
         <xs:element ref="ns1:impp"/>
         <xs:element ref="ns1:key"/>
         <xs:element ref="ns1:kind"/>
         <xs:element ref="ns1:lang"/>
         <xs:element ref="ns1:logo"/>
         <xs:element ref="ns1:member"/>
         <xs:element ref="ns1:n"/>
         <xs:element ref="ns1:nickname"/>
         <xs:element ref="ns1:note"/>
         <xs:element ref="ns1:org"/>
         <xs:element ref="ns1:photo"/>
         <xs:element ref="ns1:prodid"/>
         <xs:element ref="ns1:related"/>
         <xs:element ref="ns1:rev"/>
         <xs:element ref="ns1:role"/>
         <xs:element ref="ns1:gender"/>
         <xs:element ref="ns1:sound"/>
         <xs:element ref="ns1:source"/>
         <xs:element ref="ns1:tel"/>
         <xs:element ref="ns1:title"/>
         <xs:group ref="ns1:property-tz"/>
         <xs:element ref="ns1:uid"/>



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         <xs:element ref="ns1:url"/>
       </xs:choice>
     </xs:group>

     <xs:element name="vcards">
       <xs:complexType>
         <xs:sequence>
           <xs:element maxOccurs="unbounded" ref="ns1:vcard"/>
         </xs:sequence>
       </xs:complexType>
     </xs:element>

     <xs:complexType name="vcardType">
       <xs:complexContent>
         <xs:restriction base="xs:anyType">
           <xs:choice maxOccurs="unbounded">
             <xs:group ref="ns1:property"/>
             <xs:element ref="ns1:group"/>
           </xs:choice>

         </xs:restriction>
       </xs:complexContent>
     </xs:complexType>

     <xs:element name="vcard"  type="ns1:vcardType"/>

     <xs:element name="group">
       <xs:complexType>
         <xs:group minOccurs="0" maxOccurs="unbounded"
         ref="ns1:property"/>
         <xs:attribute name="name" use="required"/>
       </xs:complexType>
     </xs:element>
   </xs:schema>



Authors' Addresses

   Brian Rosen
   NeuStar
   470 Conrad Dr.
   Mars, PA  16046
   US

   Phone: +1 724 382 1051
   Email: br@brianrosen.net




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   Hannes Tschofenig
   Nokia Siemens Networks
   Linnoitustie 6
   Espoo  02600
   Finland

   Phone: +358 (50) 4871445
   Email: Hannes.Tschofenig@gmx.net
   URI:   http://www.tschofenig.priv.at


   Roger Marshall
   TeleCommunication Systems, Inc.
   2401 Elliott Avenue
   Seattle, WA  98121
   US

   Phone: +1 206 792 2424
   Email: rmarshall@telecomsys.com
   URI:   http://www.telecomsys.com


   Randall Gellens
   Qualcomm Technologies, Inc.
   5775 Morehouse Drive
   San Diego, CA  92121
   US

   Email: rg+ietf@qti.qualcomm.com





















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