3017
PROPOSED STANDARD
XML DTD for Roaming Access Phone Book
Authors: M. Riegel, G. Zorn
Date: December 2000
Area: ops
Working Group: roamops
Stream: IETF
Abstract
This document defines the syntax as well as the semantics of the information to be included in the phone book for roaming applications. [STANDARDS-TRACK]
RFC 3017
PROPOSED STANDARD
Network Working Group M. Riegel
Request for Comments: 3017 Siemens AG
Category: Standards Track G. Zorn
Cisco Systems
December 2000
<span class="h1">XML DTD for Roaming Access Phone Book</span>
Status of this Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2000). All Rights Reserved.
Abstract
This document defines the syntax as well as the semantics of the
information to be included in the phone book for roaming
applications. It comprises the information necessary to select the
most appropriate ISP and to configure the host to get access to the
network of the provider. The specification consists of a small set of
required information elements and a variety of possible extensions.
All data is specified in XML [<a href="#ref-5" title=""Extensible Markup Language (XML) 1.0"">5</a>] (Extensible Markup Language) syntax
leading to a concise XML DTD (Document Type Declaration) for the
phone book.
Table of Contents
<a href="#section-1">1</a>. Introduction ............................................. <a href="#page-3">3</a>
<a href="#section-2">2</a>. Rationale for XML Usage .................................. <a href="#page-4">4</a>
<a href="#section-3">3</a>. Specification of Requirements ............................ <a href="#page-5">5</a>
<a href="#section-4">4</a>. Value type notations for 'stronger' typing ............... <a href="#page-5">5</a>
<a href="#section-5">5</a>. Container Element Definitions ............................ <a href="#page-5">5</a>
<a href="#section-5.1">5.1</a>. PhoneBook ............................................ <a href="#page-5">5</a>
<a href="#section-5.1.1">5.1.1</a>. phoneBook Attribute "name" ........................ <a href="#page-6">6</a>
<a href="#section-5.1.2">5.1.2</a>. phoneBook Attribute "version" ..................... <a href="#page-6">6</a>
<a href="#section-5.2">5.2</a>. POP .................................................. <a href="#page-7">7</a>
<a href="#section-5.2.1">5.2.1</a>. pop Attribute "entryVersion" ...................... <a href="#page-8">8</a>
<a href="#section-5.3">5.3</a>. Setup ................................................ <a href="#page-8">8</a>
<a href="#section-5.4">5.4</a>. Support .............................................. <a href="#page-9">9</a>
<a href="#section-5.5">5.5</a>. Provider ............................................. <a href="#page-9">9</a>
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<a href="#section-6">6</a>. Information Element Definitions .......................... <a href="#page-10">10</a>
<a href="#section-6.1">6.1</a>. Information elements defined for the POP element ..... <a href="#page-10">10</a>
<a href="#section-6.1.1">6.1.1</a>. Address ........................................... <a href="#page-10">10</a>
<a href="#section-6.1.1.1">6.1.1.1</a>. address Attribute "family" ..................... <a href="#page-10">10</a>
<a href="#section-6.1.1.2">6.1.1.2</a>. address Attribute "countryCode" ................ <a href="#page-11">11</a>
<a href="#section-6.1.1.3">6.1.1.3</a>. address Attribute "areaCode" ................... <a href="#page-11">11</a>
<a href="#section-6.1.2">6.1.2</a>. Media ............................................. <a href="#page-11">11</a>
<a href="#section-6.1.2.1">6.1.2.1</a>. Modem Protocols ................................ <a href="#page-12">12</a>
<a href="#section-6.1.2.2">6.1.2.2</a>. ISDN Protocols ................................. <a href="#page-12">12</a>
<a href="#section-6.1.2.3">6.1.2.3</a>. ATM Protocols .................................. <a href="#page-13">13</a>
<a href="#section-6.1.2.4">6.1.2.4</a>. Frame Relay Protocols .......................... <a href="#page-13">13</a>
<a href="#section-6.1.2.5">6.1.2.5</a>. X.25 Protocols ................................. <a href="#page-13">13</a>
<a href="#section-6.1.3">6.1.3</a>. Minimum Data Rate ................................. <a href="#page-14">14</a>
<a href="#section-6.1.4">6.1.4</a>. Maximum Data Rate ................................. <a href="#page-14">14</a>
<a href="#section-6.1.5">6.1.5</a>. POP Properties .................................... <a href="#page-14">14</a>
<a href="#section-6.1.6">6.1.6</a>. Tunneling Protocols ............................... <a href="#page-15">15</a>
<a href="#section-6.1.7">6.1.7</a>. Dialing Script .................................... <a href="#page-15">15</a>
<a href="#section-6.1.8">6.1.8</a>. Pricing Information ............................... <a href="#page-16">16</a>
<a href="#section-6.1.9">6.1.9</a>. City .............................................. <a href="#page-16">16</a>
<a href="#section-6.1.10">6.1.10</a>. Region ........................................... <a href="#page-16">16</a>
<a href="#section-6.1.11">6.1.11</a>. Country .......................................... <a href="#page-16">16</a>
<a href="#section-6.1.12">6.1.12</a>. POP Setup ........................................ <a href="#page-17">17</a>
<a href="#section-6.1.13">6.1.13</a>. POP Support ...................................... <a href="#page-17">17</a>
<a href="#section-6.1.14">6.1.14</a>. POP Provider ..................................... <a href="#page-17">17</a>
<a href="#section-6.2">6.2</a>. Information elements defined for the Setup element ... <a href="#page-17">17</a>
<a href="#section-6.2.1">6.2.1</a>. DNS Server Address ................................ <a href="#page-17">17</a>
<a href="#section-6.2.2">6.2.2</a>. NNTP Server Name .................................. <a href="#page-18">18</a>
<a href="#section-6.2.3">6.2.3</a>. SMTP Server Name .................................. <a href="#page-18">18</a>
<a href="#section-6.2.4">6.2.4</a>. POP3 Server Name .................................. <a href="#page-18">18</a>
<a href="#section-6.2.5">6.2.5</a>. IMAP Server Name .................................. <a href="#page-18">18</a>
<a href="#section-6.2.6">6.2.6</a>. WWW Proxy ......................................... <a href="#page-19">19</a>
<a href="#section-6.2.7">6.2.7</a>. FTP Proxy ......................................... <a href="#page-19">19</a>
<a href="#section-6.2.8">6.2.8</a>. Winsock Proxy ..................................... <a href="#page-19">19</a>
<a href="#section-6.2.9">6.2.9</a>. Default Gateway Address ........................... <a href="#page-19">19</a>
<a href="#section-6.2.10">6.2.10</a>. User Name Suffix ................................. <a href="#page-20">20</a>
<a href="#section-6.2.11">6.2.11</a>. User Name Prefix ................................. <a href="#page-20">20</a>
<a href="#section-6.3">6.3</a>. Information elements defined for the support element.. <a href="#page-20">20</a>
<a href="#section-6.3.1">6.3.1</a>. Support Telephone Number .......................... <a href="#page-20">20</a>
<a href="#section-6.3.2">6.3.2</a>. Support Email Address ............................. <a href="#page-21">21</a>
6.4. Information elements defined for the provider element. 21
<a href="#section-6.4.1">6.4.1</a>. Provider Name ..................................... <a href="#page-21">21</a>
<a href="#section-6.4.2">6.4.2</a>. Provider Icon ..................................... <a href="#page-21">21</a>
<a href="#section-6.4.3">6.4.3</a>. Provider's World Wide Web URL ..................... <a href="#page-21">21</a>
<a href="#section-6.4.4">6.4.4</a>. Provider's Main Email Address ..................... <a href="#page-22">22</a>
<a href="#section-6.4.5">6.4.5</a>. Billing Inquiry Email Address ..................... <a href="#page-22">22</a>
<a href="#section-6.4.6">6.4.6</a>. Further elements .................................. <a href="#page-22">22</a>
<a href="#section-7">7</a>. Complete XML DTD for the roaming phone book .............. <a href="#page-22">22</a>
<a href="#section-8">8</a>. Security Considerations .................................. <a href="#page-28">28</a>
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<a href="#section-9">9</a>. IANA Considerations ...................................... <a href="#page-28">28</a>
<a href="#section-9.1">9.1</a>. Registration of new attribute values ................. <a href="#page-29">29</a>
<a href="#section-9.2">9.2</a>. Registration of new information elements ............. <a href="#page-29">29</a>
<a href="#section-10">10</a>. References .............................................. <a href="#page-30">30</a>
<a href="#section-11">11</a>. Appendix: Examples ...................................... <a href="#page-31">31</a>
<a href="#section-11.1">11.1</a>. The most simple example ............................. <a href="#page-31">31</a>
<a href="#section-11.2">11.2</a>. A more comprehensive example ........................ <a href="#page-31">31</a>
<a href="#section-12">12</a>. Acknowledgments ......................................... <a href="#page-31">31</a>
<a href="#section-13">13</a>. Authors' Addresses ...................................... <a href="#page-32">32</a>
<a href="#section-14">14</a>. Full Copyright Statement ................................ <a href="#page-33">33</a>
<span class="h2"><a class="selflink" id="section-1" href="#section-1">1</a>. Introduction</span>
Roaming applications depend on the delivery of information about
provided services and the procedures to get connected to the network
from the roaming consortium to the individual users as well as from
the operators of the network access servers, normally the members of
the roaming consortium, and the roaming consortium.
"phone book"
+------+ +--+
| | | ++
| ISP1 | -- | | --+
| | +---+ \ "phone book"
+------+ \ +------+
+------+ +--+ \_ | | +--+ +------+
| | | ++ | | | ++ | |
| ISP2 | -- | | -->>--- | | --- | | ->> | USER |
| | +---+ _ | | +---+ | |
+------+ / | | +------+
+------+ +--+ / +------+
| | | ++ / Roaming
| ISP# | -- | | --+ Consortium
| | +---+
+------+
The roaming consortium assembles from the individual contributions of
the providers belonging to the consortium a unified version of the
phone book for usage by the customers. Probably different groups of
users get different versions of a phone book adapted to their
particular needs. Even users might generate different subsets
especially suited to particular applications from the information
received from the roaming consortium, e.g., retrieving only entries
for a particular country or extracting all access points providing
wireless connectivity.
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Therefore it is desirable to define a highly portable and well formed
structure of the phone book to enable easy generation and
postprocessing. Goals of this document include:
- Creating a flexible, extensible and robust framework
upon which to build a standard phone book;
- Promoting a standard phone book format, to enhance
interoperability between ISPs and roaming consortia as
well as to enable automatic extraction of configuration
data by a wide variety of devices;
- Defining a compact structure containing the essential
information for the roaming user, to allow for storage
and easy update even on small devices.
It is not intended by this document to create a plethoric solution,
with phone book elements to fit every condition on earth, neither to
define any kind of phone book update or transfer protocol.
<span class="h2"><a class="selflink" id="section-2" href="#section-2">2</a>. Rationale for XML Usage</span>
XML is rapidly becoming a standard format for data exchange between
different applications also taking into account the transfer and
access of data over the web. XML is used as syntax for expressing
the structure and content of a roaming phone book to enable
widespread usage and access to many different kind of media (e.g.,
paper, CDROM, www) using a widespread selection of access devices.
Furthermore XML enables:
- Extensibility
- Flexibility
- Integration with directories
Extensibility is important because phone books are living documents;
as such, it is unlikely that all the semantic requirements of
arbitrary Internet service providers (ISPs) would be met by a fixed
scheme, no matter how well thought out. Phone book designers must be
free to create new attributes in a well-understood fashion to meet
changing business needs.
Flexibility is required of the attribute definition syntax for many
of the same reasons that semantic extensibility is necessary. If we
assume that phone book designers may need to define elements of
arbitrary type, the syntax chosen must be able to represent these
data objects cleanly. Using XML for describing the data content of
the phone book fits this bill nicely, since it can be used to
unambiguously describe virtually any data type.
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Integration with directories: although it is unlikely that phone
books will be stored in the directory due to performance
considerations, the creation of a XML DTD describing phone book
content leaves that option open, with relatively little incremental
effort required to implement it.
<span class="h2"><a class="selflink" id="section-3" href="#section-3">3</a>. Specification of Requirements</span>
In this document, the key words "MAY", "MUST, "MUST NOT", "optional",
"recommended", "SHOULD", and "SHOULD NOT", are to be interpreted as
described in [<a href="#ref-1" title=""Key words for use in RFCs to Indicate Requirement Levels"">1</a>].
<span class="h2"><a class="selflink" id="section-4" href="#section-4">4</a>. Value type notations for 'stronger' typing</span>
XML DTDs do not currently have capabilities for 'strong typing' of
the content of elements. The only type definition foreseen in the
base specification is "#PCDATA", 'parsable character data'. This
might be sufficient and is used throughout this document to define
elements containing information mainly aimed for interpretation by
human beings.
To enable a more concise description of the content of particular
elements several value type notations are introduced. This allows
for a more detailed type description of the content of elements in
cases where it seems to be desirable.
<?xml version="1.0" encoding="UTF-8"?>
<!-- Phone book value type notation declarations -->
<!NOTATION FQDN PUBLIC "-//IETF/roamPhoneBook/NOTATION
value Type Fully_qualified_domain_name">
<!NOTATION IPADR PUBLIC "-//IETF/roamPhoneBook/NOTATION
value Type IP_address">
<!NOTATION B64JPG PUBLIC "-//IETF/roamPhoneBook/NOTATION
value Type Base64_encoded_jpeg_image">
<!NOTATION B64GIF PUBLIC "-//IETF/roamPhoneBook/NOTATION
value Type Base64_encoded_gif_image">
<span class="h2"><a class="selflink" id="section-5" href="#section-5">5</a>. Container Element Definitions</span>
<span class="h3"><a class="selflink" id="section-5.1" href="#section-5.1">5.1</a>. PhoneBook</span>
The phoneBook element is the basic container for phone book entries.
It has two attributes, a phone book name and a phone book version
number (applying to the phone book as a whole), and always contains
one or more pop elements. A phoneBook element may also contain
multiple Setup, Support and Provider elements, if they are referenced
to by more than one pop element.
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Syntax:
<!ELEMENT phoneBook (
pop+,
setup*,
support*,
provider*)>
<!ATTLIST phoneBook
name CDATA #REQUIRED
version CDATA #REQUIRED >
phoneBook
+-----------------------------------+
| phoneBookName (req)|
| phoneBookVersion (req)|
| +-----------------------+ |
| | pop |+ (req)|
| +-----------------------+| |
| + - - - - - - - - - - - + |
| |
| + - - - - - - - - - - - + |
| | setup |+ (opt)|
| + - - - - - - - - - - - +| |
| + - - - - - - - - - - - + |
| |
| + - - - - - - - - - - - + |
| | support |+ (opt)|
| + - - - - - - - - - - - +| |
| + - - - - - - - - - - - + |
| |
| + - - - - - - - - - - - + |
| | provider |+ (opt)|
| + - - - - - - - - - - - +| |
| + - - - - - - - - - - - + |
+-----------------------------------+
<span class="h4"><a class="selflink" id="section-5.1.1" href="#section-5.1.1">5.1.1</a>. phoneBook Attribute "name"</span>
The phoneBook attribute "name" is an arbitrary string assigned as an
identifier for a phone book.
<span class="h4"><a class="selflink" id="section-5.1.2" href="#section-5.1.2">5.1.2</a>. phoneBook Attribute "version"</span>
The phoneBookVersion attribute is an integer representing the version
of the phone book; it is a monotonically increasing counter which
should be incremented each time the phone book is modified. This
element can be used by a server to help decide what (if any) actions
are required to bring a client's phone book up to date. For example,
the client can, at connect time, send an update request to the server
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including in the request the version number of its current phone
book. If the client's phone book version is not the same as the
server's current phone book version, the server can easily take
appropriate action, e.g., reply with a URL pointing to a file
containing the differences between the client and server phone books.
<span class="h3"><a class="selflink" id="section-5.2" href="#section-5.2">5.2</a>. POP</span>
The pop element contains information elements relevant to individual
network points of presence (POPs). The required information elements
are addrFamily, address, media and entryVersion. The media element
represents the media types supported by the POP, while the
entryVersion element is a monotonically-increasing integer which
should be incremented whenever the object is modified.
The following information elements are currently defined for the pop
element. Additional information elements may be defined by IANA in
future.
POP
+-----------------------------------+
| entryVersion (req)|
| +-------------------------+ |
| | address | (req)|
| +-------------------------+ |
| media (req)|
| minBitsPerSecond (opt)|
| maxBitsPerSecond (opt)|
| "popProperties" (opt)|
| "tunnelingProtocols" (opt)|
| dialScript (opt)|
| pricingInformation (opt)|
| + - - - - - - - - - - - - + |
| | "location" | (opt)|
| + - - - - - - - - - - - - + |
| + - - - - - - - - - - - - + |
| | "popSetup" | (opt)|
| + - - - - - - - - - - - - + |
| + - - - - - - - - - - - - + |
| | "popSupport" | (opt)|
| + - - - - - - - - - - - - + |
| + - - - - - - - - - - - - + |
| | "popProvider" | (opt)|
| + - - - - - - - - - - - - + |
+-----------------------------------+
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Syntax:
<!ENTITY % popInformation
"address,
media+,
minBitsPerSecond?,
maxBitsPerSecond?,
popProperty*,
tunnelProto*,
dialScript?,
pricingInformation?,
city?,
region?,
country?,
(setup | setupPtr)?,
(support | supportPtr)?,
(provider |providerPtr)?">
<!ELEMENT pop ( %popInformation; )>
<!ATTLIST pop
entryVersion CDATA #REQUIRED>
<span class="h4"><a class="selflink" id="section-5.2.1" href="#section-5.2.1">5.2.1</a>. pop Attribute "entryVersion"</span>
The entryVersion attribute is an integer representing the version of
the POP object; it is a monotonically increasing counter which should
be incremented each time the object is modified. This attribute may
be useful in merging and updating phone books.
<span class="h3"><a class="selflink" id="section-5.3" href="#section-5.3">5.3</a>. Setup</span>
The Setup element includes information elements which describe
services which may change from provider to provider or even from POP
to POP. Some of the values contained in these information elements
may be available by other means (e.g., DHCP), but others may not.
The following information elements are currently defined for the
Setup element. Additional information elements may be defined by
IANA in future.
Syntax:
<!ENTITY % setupInformation
"dnsServerAddress*,
nntpServerName*,
smtpServerName*,
popServerName*,
imapServerName*,
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wwwProxyServerName*,
ftpProxyServerName*,
winsockProxyServerName*,
defaultGatewayAddress?,
userNamePrefix?,
userNameSuffix?">
<!ELEMENT setup ( %setupInformation; )>
<!ATTLIST setup
id ID #REQUIRED>
<span class="h3"><a class="selflink" id="section-5.4" href="#section-5.4">5.4</a>. Support</span>
The Support element includes those information elements that are
pertinent to the provision of customer support for a POP or provider.
Languages spoken by the staff at the support center might be
specified by multiple entries for the attribute value language.
Additional information elements for the Support element may be
defined by IANA in future.
Syntax:
<!ENTITY % supportInformation
"(supportTelephoneNumber | supportMailtoURL)+">
<!ELEMENT support %supportInformation; >
<!ATTLIST support
id ID #REQUIRED
language NMTOKENS #IMPLIED >
<span class="h3"><a class="selflink" id="section-5.5" href="#section-5.5">5.5</a>. Provider</span>
The Provider element contains information elements pertaining to the
general business operations of a given network service provider. The
information elements include such things as telephone number, mailing
address, etc., as well as URLs for e-mail and a World Wide Web site.
A Provider element may also contain a reference to support
information.
Currently the following information elements are defined for the
Provider element. Additional information elements may be defined by
IANA in future.
Syntax:
<!ENTITY % providerInformation
"providerName?,
providerIcon?,
wwwURL?,
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generalMailtoURL?,
billingMailtoURL?,
businessCategory?,
x121Address?,
registeredAddress?,
destinationIndicator?,
preferredDeliveryMethod?,
telexNumber?,
teletexTerminalIdentifier?,
telephoneNumber?,
internationalISDNNumber?,
facsimileTelephoneNumber?,
street?,
postOfficeBox?,
postalCode?,
postalAddress?,
physicalDeliveryOfficeName?,
description?,
supportPtr*">
<!ELEMENT provider ( %providerInformation; )>
<!ATTLIST provider
id ID #REQUIRED>
<span class="h2"><a class="selflink" id="section-6" href="#section-6">6</a>. Information Element Definitions</span>
<span class="h3"><a class="selflink" id="section-6.1" href="#section-6.1">6.1</a>. Information elements defined for the POP element</span>
<span class="h4"><a class="selflink" id="section-6.1.1" href="#section-6.1.1">6.1.1</a>. Address</span>
The address element provides the information representing the address
of the POP. For POPs offering dial-up network access, the address
element will at least contain an IA5 string representing a telephone
number, formatted in standard fashion [<a href="#ref-4" title=""Notation for national and international telephone numbers"">4</a>] (e.g., "+ 1 234 5678").
More detailed information may be available by optional attribute
values.
Syntax:
<!-- A network address for this POP -->
<!ELEMENT address (#PCDATA)>
<span class="h5"><a class="selflink" id="section-6.1.1.1" href="#section-6.1.1.1">6.1.1.1</a>. address Attribute "family"</span>
The attribute family of the element address defines the address
family to which the element value belongs. For POPs offering dial-up
network access, the addrFamily attribute will generally contain a
value for a telephone network based address family. Currently the
following attribute values are defined. Additional values may be
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registered by IANA in future.
Value Description
------ ------------------------------------------
E164 ITU-T E.164 (PSTN, SMDS, Frame Relay, ATM)
X121 ITU-T X.121 (X.25, Frame Relay)
Syntax:
<!-- Attribute values for address family -->
<!ENTITY % addressFamily "(E164|X121)" >
<!ATTLIST address
family %addressFamily; #REQUIRED >
<span class="h5"><a class="selflink" id="section-6.1.1.2" href="#section-6.1.1.2">6.1.1.2</a>. address Attribute "countryCode"</span>
The countryCode attribute indicates the international dialing prefix
for the country in which the POP is located.
Syntax:
<!-- ITU dialing code for the country in which this POP is located -->
<!ATTLIST address
countryCode CDATA #IMPLIED >
<span class="h5"><a class="selflink" id="section-6.1.1.3" href="#section-6.1.1.3">6.1.1.3</a>. address Attribute "areaCode"</span>
The areaCode attribute contains the area or city code component of
the telephone number in the 'address' element (if any) associated
with this POP.
<!-- Area or city code component of the telephone number in the
accessTelephoneNumber element associated with this POP -->
<!ATTLIST address
areaCode CDATA #IMPLIED >
<span class="h4"><a class="selflink" id="section-6.1.2" href="#section-6.1.2">6.1.2</a>. Media</span>
The media element is a container describing the types of media and
related protocols supported by this POP. The following media types
are currently defined. Additional types may be registered by IANA in
future.
Value Media Type
-------- -----------
viaMODEM Modem
viaISDN ISDN
viaATM ATM
viaFR Frame Relay
viaX25 X.25
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Syntax:
<!-- The types of media supported by this POP -->
<!ENTITY % mediaTypes "(viaMODEM|viaISDN|viaATM|viaFR|viaX25)+" >
<!ELEMENT media %mediaTypes; >
<span class="h5"><a class="selflink" id="section-6.1.2.1" href="#section-6.1.2.1">6.1.2.1</a>. Modem Protocols</span>
The viaMODEM element is an empty element representing by its optional
type attribute the modem protocol supported by the access devices
that can be reached at address. To define multiple available
protocols this element may be included repeatedly. The initially
defined modem protocol types are listed in the table below.
Additional values may be registered by IANA in future.
Value Duplex Speed Protocol
----- ------ ----- -------------
V21 Full 300 ITU-T V.21
V22 Full 1200 ITU-T V.22
V29 Half 9600 ITU-T V.29
V32 Full 9600 ITU-T V.32
V32B Full 14.4k ITU-T V.32bis
V34 Full 28.8k ITU-T V.34
V34B Full 33.6k ITU-T V.34bis
V90 Full 56k ITU-T V.90
Syntax
<!-- A modem media type element -->
<!ENTITY % modemProtocols "(V21|V22|V29|V32|V32B|V34|V34B|V90)" >
<!ELEMENT viaMODEM EMPTY>
<!ATTLIST viaMODEM
type %modemProtocols; #IMPLIED >
<span class="h5"><a class="selflink" id="section-6.1.2.2" href="#section-6.1.2.2">6.1.2.2</a>. ISDN Protocols</span>
The viaISDN element is an empty element representing by its optional
type attribute the ISDN protocol supported by the access devices that
can be reached at address. To define multiple available protocols
this element may be included repeatedly. The initially defined ISDN
protocol types are listed in the table below. Additional values may
be registered by IANA in future.
Value Speed Meaning
----- ----- -----------
V110L 19.2k ITU-T V.110
V110H 38.4k ITU-T V.110
V120L 56k ITU-T V.120
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V120H 64k ITU-T V.120
X75 64k ITU-T X.75
HDLC 64k <a href="./rfc1618">RFC 1618</a>
Syntax:
<!-- An ISDN media type element -->
<!ENTITY % isdnProtocols "(V110L|V110H|V120L|V120H|X75|HDLC)">
<!ELEMENT viaISDN EMPTY>
<!ATTLIST viaISDN
type %isdnProtocols; #IMPLIED >
<span class="h5"><a class="selflink" id="section-6.1.2.3" href="#section-6.1.2.3">6.1.2.3</a>. ATM Protocols</span>
The viaATM element is an empty element representing by its optional
type attribute a particular protocol supported by the access devices
that can be reached at address. To define multiple available
protocols this element may be included repeatedly. Currently only
one protocol is defined. Additional values may be registered by IANA
in future.
Syntax:
<!-- An ATM media type element -->
<!ENTITY % atmProtocols "(<a href="./rfc2364">RFC2364</a>)">
<!ELEMENT viaATM EMPTY>
<!ATTLIST viaATM
type %atmProtocols; #IMPLIED >
<span class="h5"><a class="selflink" id="section-6.1.2.4" href="#section-6.1.2.4">6.1.2.4</a>. Frame Relay Protocols</span>
The viaFR element is an empty element representing by its optional
type attribute the particular protocol supported by the access
devices that can be reached at address. To define multiple available
protocols this element may be included repeatedly. Currently only
one protocol is defined. Additional values may be registered by IANA
in future.
Syntax:
<!-- A Frame Relay media type element -->
<!ENTITY % frProtocols "(<a href="./rfc1973">RFC1973</a>)">
<!ELEMENT viaFR EMPTY>
<!ATTLIST viaFR
type %frProtocols; #IMPLIED >
<span class="h5"><a class="selflink" id="section-6.1.2.5" href="#section-6.1.2.5">6.1.2.5</a>. X.25 Protocols</span>
The viaX25 element is an empty element representing by its optional
type attribute the particular protocol supported by the access
devices that can be reached at address. To define multiple available
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protocols this element may be included repeatedly. Currently only
one protocol is defined. Additional values may be registered by IANA
in future.
Syntax:
<!-- A X.25 media type element -->
<!ENTITY % x25Protocols "(<a href="./rfc1598">RFC1598</a>)">
<!ELEMENT viaX25 EMPTY>
<!ATTLIST viaX25
type %x25Protocols; #IMPLIED >
<span class="h4"><a class="selflink" id="section-6.1.3" href="#section-6.1.3">6.1.3</a>. Minimum Data Rate</span>
The minBitsPerSecond element indicates the minimum data rate (in
bits/second) supported by the access devices at the POP.
Syntax:
<!-- Minimum data rate supported by this POP in bits/second -->
<!ELEMENT minBitsPerSecond (#PCDATA)>
<span class="h4"><a class="selflink" id="section-6.1.4" href="#section-6.1.4">6.1.4</a>. Maximum Data Rate</span>
The maxBitsPerSecond element indicates the maximum data rate (in
bits/second) supported by the access devices at the POP.
Syntax:
<!-- Maximum data rate supported by this POP in bits/second -->
<!ELEMENT maxBitsPerSecond (#PCDATA)>
<span class="h4"><a class="selflink" id="section-6.1.5" href="#section-6.1.5">6.1.5</a>. POP Properties</span>
The popProperty element is an empty element representing by its
attribute value a particular property of this POP. To define
multiple available protocols this element might be included several
times. The initially defined properties are listed in the table
below. Additional values may be registered by IANA in future.
Value Property
------ ----------------------
MPPP Multilink PPP (<a href="./rfc1990">RFC 1990</a>)
MOBIP Mobile IP (<a href="./rfc2002">RFC 2002</a>)
MCRX Multicast Reception
MCTX Multicast Transmission
Syntax:
<!-- A property characterizing this POP -->
<!ENTITY % popProperties "(MPPP|MOBIP|MCRX|MCTX)" >
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<!ELEMENT popProperty EMPTY>
<!ATTLIST popProperty
type %popProperties; #REQUIRED>
<span class="h4"><a class="selflink" id="section-6.1.6" href="#section-6.1.6">6.1.6</a>. Tunneling Protocols</span>
The tunnelProto element is an empty element representing by its
attribute a tunneling protocol supported by this POP. To define
multiple available protocols this element might be included several
times. The initially defined values are listed in the table below.
Additional values may be registered by IANA in future.
Value Protocol
------ ------------------
L2TP <a href="./rfc2661">RFC 2661</a> L2TP
PPTP <a href="./rfc2637">RFC 2637</a> PPTP
L2F <a href="./rfc2341">RFC 2341</a> L2F
ATMP <a href="./rfc2107">RFC 2107</a> ATMP
AHT <a href="./rfc2402">RFC 2402</a> IP AH Tunnel Mode
ESPT <a href="./rfc2406">RFC 2406</a> IP ESP Tunnel Mode
IPIP <a href="./rfc1853">RFC 1853</a> IP-IP
MIP <a href="./rfc2004">RFC 2004</a> Minimal IP-IP
GRE <a href="./rfc1701">RFC 1701</a> GRE
Syntax:
<!-- A tunneling protocol supported by this POP -->
<!ENTITY % tunnelingProtocols
"(L2TP|PPTP|L2F|ATMP|AHT|ESPT|IPIP|MIP|GRE)" >
<!ELEMENT tunnelProto EMPTY>
<!ATTLIST tunnelProto
type %tunnelingProtocols; #REQUIRED>
<span class="h4"><a class="selflink" id="section-6.1.7" href="#section-6.1.7">6.1.7</a>. Dialing Script</span>
The dialScript element contains the dialing script to be used when
connecting to this POP. The attribute value type of dialScript
defines the type of the script that should be used when connecting to
this POP.
Syntax:
<!-- The dial script to be used -->
<!ELEMENT dialScript (#PCDATA)>
<!ATTLIST dialScript
type CDATA #IMPLIED >
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<span class="h4"><a class="selflink" id="section-6.1.8" href="#section-6.1.8">6.1.8</a>. Pricing Information</span>
The pricingInformation element is a free-form string representing
pricing information for this POP. It may be anything from a simple
string indicating relative expense (e.g., "$$$$" for a very expensive
POP) to a paragraph describing time-of-day and other differential
pricing variables.
Syntax:
<!-- Pricing information for this POP -->
<!ELEMENT pricing (#PCDATA)>
<span class="h4"><a class="selflink" id="section-6.1.9" href="#section-6.1.9">6.1.9</a>. City</span>
The city element contains the name of the city in which the POP is
located (not the city(s) from which it is accessible by a local
call).
Syntax:
<!-- The name of the city in which this POP is located -->
<!ELEMENT city (#PCDATA)>
<span class="h4"><a class="selflink" id="section-6.1.10" href="#section-6.1.10">6.1.10</a>. Region</span>
The region element contains the name of the region in which the POP
is located. In the United States, this would be the name of a state
or (for Washington, D.C.) administrative district. In other
countries, it might be the name of a province, parish or county.
Syntax:
<!-- The name of the region in which this POP is located -->
<!ELEMENT region (#PCDATA)>
<span class="h4"><a class="selflink" id="section-6.1.11" href="#section-6.1.11">6.1.11</a>. Country</span>
The country element contains the name of the country in which the POP
is located. The country name may be abbreviated (e.g., "USA" for the
United States of America or "UK" for the United Kingdom) but if
abbreviations are used the usage must be consistent within a given
phone book.
Syntax:
<!-- The name of the country in which this POP is located -->
<!ELEMENT country (#PCDATA)>
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<span class="h4"><a class="selflink" id="section-6.1.12" href="#section-6.1.12">6.1.12</a>. POP Setup</span>
The popSetup element is either a setup element, if setup is specific
to this particular POP, or a reference to any of the setup elements
given in the outer scope of the phonebook element.
Syntax:
<!-- Reference for setup information for this POP -->
<!ELEMENT setupPtr EMPTY>
<!ATTLIST setupPtr
setupID IDREFS #IMPLIED>
<span class="h4"><a class="selflink" id="section-6.1.13" href="#section-6.1.13">6.1.13</a>. POP Support</span>
The popSupport element is either a support element, if support is
specific to this particular POP, or a reference to any of the support
elements given in the outer scope of the phonebook element.
Syntax:
<!-- Reference for support information for this POP -->
<!ELEMENT supportPtr EMPTY>
<!ATTLIST supportPtr
supportID IDREFS #IMPLIED>
<span class="h4"><a class="selflink" id="section-6.1.14" href="#section-6.1.14">6.1.14</a>. POP Provider</span>
The popProvider element is either a provider element, if provider
information is specific to this particular POP, or a reference to any
of the provider elements given in the outer scope of the phonebook
element.
Syntax:
<!-- Reference for provider information for this POP -->
<!ELEMENT providerPtr EMPTY>
<!ATTLIST providerPtr
providerID IDREFS #IMPLIED>
<span class="h3"><a class="selflink" id="section-6.2" href="#section-6.2">6.2</a>. Information elements defined for the Setup element</span>
<span class="h4"><a class="selflink" id="section-6.2.1" href="#section-6.2.1">6.2.1</a>. DNS Server Address</span>
The dnsServerAddress element represents the IP address of the Domain
Name Service (DNS) server which should be used when connected to this
POP. The address is represented in the form of a string in dotted-
decimal notation (e.g., 192.168.101.1).
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Syntax:
<!-- Domain Name Server IP address -->
<!ELEMENT dnsServerAddress (#PCDATA)>
<!ATTLIST dnsServerAddress
value NOTATION (IPADR) #IMPLIED>
<span class="h4"><a class="selflink" id="section-6.2.2" href="#section-6.2.2">6.2.2</a>. NNTP Server Name</span>
The nntpServerName element contains the fully qualified domain name
(FQDN) of the Network News Transfer Protocol (NNTP) server which
should be used when connected to this POP.
Syntax:
<!-- Name of an NNTP server -->
<!ELEMENT nntpServerName (#PCDATA)>
<!ATTLIST nntpServerName
value NOTATION (FQDN) #IMPLIED>
<span class="h4"><a class="selflink" id="section-6.2.3" href="#section-6.2.3">6.2.3</a>. SMTP Server Name</span>
The smtpServerName element contains the FQDN of the Simple Mail
Transfer Protocol (SMTP) server which should be used when connected
to this POP.
Syntax:
<!-- Name of an SMTP mail server -->
<!ELEMENT smtpServerName (#PCDATA)>
<!ATTLIST smtpServerName
value NOTATION (FQDN) #IMPLIED>
<span class="h4"><a class="selflink" id="section-6.2.4" href="#section-6.2.4">6.2.4</a>. POP3 Server Name</span>
The popServerName element contains the FQDN of the Post Office
Protocol (POP) server which should be used when connected to this
POP.
Syntax:
<!-- Name of an POP3 mail server -->
<!ELEMENT popServerName (#PCDATA)>
<!ATTLIST popServerName
value NOTATION (FQDN) #IMPLIED>
<span class="h4"><a class="selflink" id="section-6.2.5" href="#section-6.2.5">6.2.5</a>. IMAP Server Name</span>
The imapServerName element contains the FQDN of the Internet Mail
Access Protocol (IMAP) server which should be used when connected to
this POP.
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Syntax:
<!-- Name of an IMAP4 server -->
<!ELEMENT imapServerName (#PCDATA)>
<!ATTLIST imapServerName
value NOTATION (FQDN) #IMPLIED>
<span class="h4"><a class="selflink" id="section-6.2.6" href="#section-6.2.6">6.2.6</a>. WWW Proxy</span>
The wwwProxyServerName element contains the FQDN of the World Wide
Web (WWW) proxy server which should be used when connected to this
POP.
Syntax:
<!-- Name of an WWW Proxy -->
<!ELEMENT wwwProxyServerName (#PCDATA)>
<!ATTLIST wwwProxyServerName
value NOTATION (FQDN) #IMPLIED>
<span class="h4"><a class="selflink" id="section-6.2.7" href="#section-6.2.7">6.2.7</a>. FTP Proxy</span>
The ftpProxyServerName element contains the FQDN of the File Transfer
Protocol (FTP) proxy server which should be used when connected to
this POP.
Syntax:
<!-- Name of an FTP Proxy -->
<!ELEMENT ftpProxyServerName (#PCDATA)>
<!ATTLIST ftpProxyServerName
value NOTATION (FQDN) #IMPLIED>
<span class="h4"><a class="selflink" id="section-6.2.8" href="#section-6.2.8">6.2.8</a>. Winsock Proxy</span>
The winsockProxyServerName element contains the FQDN of the Windows
Socket (Winsock) proxy server which should be used when connected to
this POP.
Syntax:
<!-- Name of an Winsock Proxy -->
<!ELEMENT winsockProxyServerName (#PCDATA)>
<!ATTLIST winsockProxyServerName
value NOTATION (FQDN) #IMPLIED>
<span class="h4"><a class="selflink" id="section-6.2.9" href="#section-6.2.9">6.2.9</a>. Default Gateway Address</span>
The defaulttGatewayAddress element represents the address of the
default gateway which should be used when connected to this POP. The
address is represented in the form of a string in dotted-decimal
notation (e.g., 192.168.101.1).
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Syntax:
<!-- Default Gateway IP address (in dotted decimal notation) -->
<!ELEMENT defaultGatewayAddress (#PCDATA)>
<!ATTLIST defaultGatewayAddress
value NOTATION (IPADR) #IMPLIED>
<span class="h4"><a class="selflink" id="section-6.2.10" href="#section-6.2.10">6.2.10</a>. User Name Suffix</span>
The userNameSuffix element represents a string which should be
concatenated to the base username. For example, if the base username
is "userA" and the value of this element is "@bigco.com", the
resulting augmented username would be "[email protected]". An
intelligent dialer may concatenate the string automatically. Note
that both the userNameSuffix and the userNamePrefix (below) may be
applied to the same base username.
Syntax:
<!-- User Name suffix -->
<!ELEMENT userNameSuffix (#PCDATA)>
<span class="h4"><a class="selflink" id="section-6.2.11" href="#section-6.2.11">6.2.11</a>. User Name Prefix</span>
The userNamePrefix element represents a string to which the base
username should be concatenated. For example, if the base username
is "userB" and the value of this element is "BIGCO/" the resulting
augmented username would be "BIGCO/userB". An intelligent dialer may
perform the concatenation automatically. Note that both the
userNameSuffix (above) and the userNamePrefix may be applied to the
same base username.
Syntax:
<!-- User Name prefix -->
<!ELEMENT userNamePrefix (#PCDATA)>
<span class="h3"><a class="selflink" id="section-6.3" href="#section-6.3">6.3</a>. Information elements defined for the support element</span>
<span class="h4"><a class="selflink" id="section-6.3.1" href="#section-6.3.1">6.3.1</a>. Support Telephone Number</span>
The supportTelephoneNumber element contains a number that may be
called to reach the support center for a particular provider or POP.
This element is basically a string and should contain the entire
telephone number in international form, e.g., "+1 425 838 8080".
Syntax:
<!-- The number to be dialed to contact customer support
for this POP or provider -->
<!ELEMENT supportTelephoneNumber (#PCDATA)>
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<span class="h4"><a class="selflink" id="section-6.3.2" href="#section-6.3.2">6.3.2</a>. Support Email Address</span>
The supportMailtoURL element contains a URL for the provider's
customer support email address, e.g., mailto:[email protected]. This
URL could be used to contact customer support personnel regarding
non-urgent issues.
Syntax:
<!-- A Uniform Resource Locator for the provider's customer
support email address -->
<!ELEMENT supportMailtoURL (#PCDATA)>
<span class="h3"><a class="selflink" id="section-6.4" href="#section-6.4">6.4</a>. Information elements defined for the provider element</span>
<span class="h4"><a class="selflink" id="section-6.4.1" href="#section-6.4.1">6.4.1</a>. Provider Name</span>
The providerName element is a string containing the name of the
provider (e.g., "BIGNET Corporation").
Syntax:
<!-- The name of the provider -->
<!ELEMENT providerName (#PCDATA)>
<span class="h4"><a class="selflink" id="section-6.4.2" href="#section-6.4.2">6.4.2</a>. Provider Icon</span>
The providerIcon attribute contains a BASE64 encoded JPEG or GIF
image which may be used for 'branding' phone book entries or
displayed when dialing.
Syntax:
<!-- An icon in BASE64 encoded JPEG or GIF format -->
<!ELEMENT providerIcon (#PCDATA)>
<!ATTLIST providerIcon
value NOTATION (B64JPG | B64GIF) #IMPLIED>
<span class="h4"><a class="selflink" id="section-6.4.3" href="#section-6.4.3">6.4.3</a>. Provider's World Wide Web URL</span>
The wwwURL element contains a Uniform Resource Locator (URL) for the
provider's Web site, for example, <a href="http://www.uu.net">http://www.uu.net</a>.
Syntax:
<!-- A Uniform Resource Locator for the provider's home page -->
<!ELEMENT wwwURL (#PCDATA)>
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<span class="h4"><a class="selflink" id="section-6.4.4" href="#section-6.4.4">6.4.4</a>. Provider's Main Email Address</span>
The generalMailtoURL element contains a URL for the provider's main
email address, for example, mailto:[email protected]. This URL could be
used for general correspondence, complaints, etc.
Syntax:
<!-- A Uniform Resource Locator for the provider's
email address -->
<!ELEMENT generalMailtoURL (#PCDATA)>
<span class="h4"><a class="selflink" id="section-6.4.5" href="#section-6.4.5">6.4.5</a>. Billing Inquiry Email Address</span>
The billingMailtoURL element contains a URL for the provider's
billing support email address, for example, mailto:[email protected].
This URL could be used to for correspondence regarding billing and
payment issues.
Syntax:
<!-- A Uniform Resource Locator for the email
address to be used for billing inquiries -->
<!ELEMENT billingMailtoURL (#PCDATA)>
<span class="h4"><a class="selflink" id="section-6.4.6" href="#section-6.4.6">6.4.6</a>. Further elements</span>
The remainder of the information elements of the provider element are
described in principle in [<a href="#ref-3" title=""The COSINE and Internet X.500 Schema"">3</a>].
<span class="h2"><a class="selflink" id="section-7" href="#section-7">7</a>. Complete XML DTD for the roaming phone book</span>
<?xml version="1.0" encoding="UTF-8"?>
<!-- Parameter entity declaration -->
<!-- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
<!-- This section will be maintained by IANA and can be direct
referenced by the DTD specification by means of an external
parameter entity. -->
<!ENTITY % addressFamily "(E164|X121)" >
<!ENTITY % mediaTypes "(viaMODEM|viaISDN|viaATM|viaFR|viaX25)+" >
<!ENTITY % modemProtocols "(V21|V22|V29|V32|V32B|V34|V34B|V90)" >
<!ENTITY % isdnProtocols "(V110L|V110H|V120L|V120H|X75|HDLC)">
<!ENTITY % atmProtocols "(<a href="./rfc2364">RFC2364</a>)">
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<!ENTITY % frProtocols "(<a href="./rfc1973">RFC1973</a>)">
<!ENTITY % x25Protocols "(<a href="./rfc1598">RFC1598</a>)">
<!ENTITY % popProperties "(MPPP|MOBIP|MCRX|MCTX)" >
<!ENTITY % tunnelingProtocols
"(L2TP|PPTP|L2F|ATMP|AHT|ESPT|IPIP|MIP|GRE)" >
<!ENTITY % popInformation
"address,
media+,
minBitsPerSecond?,
maxBitsPerSecond?,
popProperty*,
tunnelProto*,
dialScript?,
pricingInformation?,
city?,
region?,
country?,
(setup|setupPtr)?,
(support|supportPtr)?,
(provider|providerPtr)?">
<!ENTITY % setupInformation
"dnsServerAddress*,
nntpServerName*,
smtpServerName*,
popServerName*,
imapServerName*,
wwwProxyServerName*,
ftpProxyServerName*,
winsockProxyServerName*,
defaultGatewayAddress?,
userNamePrefix?,
userNameSuffix?">
<!ENTITY % supportInformation
"(supportTelephoneNumber|supportMailtoURL)+">
<!ENTITY % providerInformation
"providerName?,
providerIcon?,
wwwURL?,
generalMailtoURL?,
billingMailtoURL?,
businessCategory?,
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x121Address?,
registeredAddress?,
destinationIndicator?,
preferredDeliveryMethod?,
telexNumber?,
teletexTerminalIdentifier?,
telephoneNumber?,
internationalISDNNumber?,
facsimileTelephoneNumber?,
street?,
postOfficeBox?,
postalCode?,
postalAddress?,
physicalDeliveryOfficeName?,
description?,
supportPtr*">
<!-- ++++++++++++++ End of IANA maintained section ++++++++++ -->
<!-- Phone book value type notation declarations -->
<!NOTATION FQDN PUBLIC "-//IETF/roamPhoneBook/NOTATION
value Type Fully_qualified_domain_name">
<!NOTATION IPADR PUBLIC "-//IETF/roamPhoneBook/NOTATION
value Type IP_address">
<!NOTATION B64JPG PUBLIC "-//IETF/roamPhoneBook/NOTATION
value Type Base64_encoded_jpeg_image">
<!NOTATION B64GIF PUBLIC "-//IETF/roamPhoneBook/NOTATION
value Type Base64_encoded_gif_image">
<!-- Phone book element declarations -->
<!ELEMENT phoneBook (
pop+,
setup*,
support*,
provider*) >
<!ATTLIST phoneBook
name CDATA #REQUIRED
version CDATA #REQUIRED >
<!ELEMENT pop ( %popInformation; )>
<!ATTLIST pop
entryVersion CDATA #REQUIRED>
<!ELEMENT setup ( %setupInformation; )>
<!ATTLIST setup
id ID #REQUIRED>
<!ELEMENT support ( %supportInformation; )>
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<!ATTLIST support
id ID #REQUIRED
language NMTOKENS #IMPLIED >
<!ELEMENT provider ( %providerInformation; )>
<!ATTLIST provider
id ID #REQUIRED>
<!-- Information elements for pop -->
<!ELEMENT address (#PCDATA)>
<!ATTLIST address
family %addressFamily; #REQUIRED
countryCode CDATA #IMPLIED
areaCode CDATA #IMPLIED >
<!ELEMENT media %mediaTypes; >
<!ELEMENT viaMODEM EMPTY>
<!ATTLIST viaMODEM
type %modemProtocols; #IMPLIED >
<!ELEMENT viaISDN EMPTY>
<!ATTLIST viaISDN
type %isdnProtocols; #IMPLIED >
<!ELEMENT viaATM EMPTY>
<!ATTLIST viaATM
type %atmProtocols; #IMPLIED >
<!ELEMENT viaFR EMPTY>
<!ATTLIST viaFR
type %frProtocols; #IMPLIED >
<!ELEMENT viaX25 EMPTY>
<!ATTLIST viaX25
type %x25Protocols; #IMPLIED >
<!ELEMENT minBitsPerSecond (#PCDATA)>
<!ELEMENT maxBitsPerSecond (#PCDATA)>
<!ELEMENT popProperty EMPTY>
<!ATTLIST popProperty
type %popProperties; #REQUIRED >
<!ELEMENT tunnelProto EMPTY>
<!ATTLIST tunnelProto
type %tunnelingProtocols; #REQUIRED >
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<!ELEMENT dialScript (#PCDATA)>
<!ATTLIST dialScript
type CDATA #IMPLIED >
<!ELEMENT pricing (#PCDATA)>
<!ELEMENT city (#PCDATA)>
<!ELEMENT region (#PCDATA)>
<!ELEMENT country (#PCDATA)>
<!ELEMENT setupPtr EMPTY>
<!ATTLIST setupPtr
setupID IDREFS #IMPLIED>
<!ELEMENT supportPtr EMPTY>
<!ATTLIST supportPtr
supportID IDREFS #IMPLIED>
<!ELEMENT providerPtr EMPTY>
<!ATTLIST providerPtr
providerID IDREFS #IMPLIED>
<!-- Information elements for setup -->
<!ELEMENT dnsServerAddress (#PCDATA)>
<!ATTLIST dnsServerAddress
value NOTATION (IPADR) #IMPLIED>
<!ELEMENT nntpServerName (#PCDATA)>
<!ATTLIST nntpServerName
value NOTATION (FQDN) #IMPLIED>
<!ELEMENT smtpServerName (#PCDATA)>
<!ATTLIST smtpServerName
value NOTATION (FQDN) #IMPLIED>
<!ELEMENT popServerName (#PCDATA)>
<!ATTLIST popServerName
value NOTATION (FQDN) #IMPLIED>
<!ELEMENT imapServerName (#PCDATA)>
<!ATTLIST imapServerName
value NOTATION (FQDN) #IMPLIED>
<!ELEMENT wwwProxyServerName (#PCDATA)>
<!ATTLIST wwwProxyServerName
value NOTATION (FQDN) #IMPLIED>
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<!ELEMENT ftpProxyServerName (#PCDATA)>
<!ATTLIST ftpProxyServerName
value NOTATION (FQDN) #IMPLIED>
<!ELEMENT winsockProxyServerName (#PCDATA)>
<!ATTLIST winsockProxyServerName
value NOTATION (FQDN) #IMPLIED>
<!ELEMENT defaultGatewayAddress (#PCDATA)>
<!ATTLIST defaultGatewayAddress
value NOTATION (IPADR) #IMPLIED>
<!ELEMENT userNameSuffix (#PCDATA)>
<!ELEMENT userNamePrefix (#PCDATA)>
<!-- Information elements for support -->
<!ELEMENT supportTelephoneNumber (#PCDATA)>
<!ELEMENT supportMailtoURL (#PCDATA)>
<!-- Information elements for provider -->
<!ELEMENT providerName (#PCDATA)>
<!ELEMENT providerIcon (#PCDATA)>
<!ATTLIST providerIcon
value NOTATION (B64JPG|B64GIF) #IMPLIED>
<!ELEMENT wwwURL (#PCDATA)>
<!ELEMENT generalMailtoURL (#PCDATA)>
<!ELEMENT billingMailtoURL (#PCDATA)>
<!-- Further provider elements according to <a href="./rfc1274">RFC1274</a> -->
<!ELEMENT businessCategory (#PCDATA)>
<!ELEMENT x121Address (#PCDATA)>
<!ELEMENT registeredAddress (#PCDATA)>
<!ELEMENT destinationIndicator (#PCDATA)>
<!ELEMENT preferredDeliveryMethod (#PCDATA)>
<!ELEMENT telexNumber (#PCDATA)>
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<!ELEMENT teletexTerminalIdentifier (#PCDATA)>
<!ELEMENT telephoneNumber (#PCDATA)>
<!ELEMENT internationalISDNNumber (#PCDATA)>
<!ELEMENT facsimileTelephoneNumber (#PCDATA)>
<!ELEMENT street (#PCDATA)>
<!ELEMENT postOfficeBox (#PCDATA)>
<!ELEMENT postalCode (#PCDATA)>
<!ELEMENT postalAddress (#PCDATA)>
<!ELEMENT physicalDeliveryOfficeName (#PCDATA)>
<!ELEMENT description (#PCDATA)>
<!-- end of dtd -->
<span class="h2"><a class="selflink" id="section-8" href="#section-8">8</a>. Security Considerations</span>
The secure distribution and transport of information of a phone book
for roaming applications require a reliable authentication of the
issuer of the information as well as means to preserve the integrity
of the provided information.
No specific elements for security requirements are provided by the
phone book XML DTD itself. It is assumed that security of the
roaming phone book is provided by means outside of the scope of this
specification, such as signing the phone book using pgp.
<span class="h2"><a class="selflink" id="section-9" href="#section-9">9</a>. IANA Considerations</span>
This specification provides the possibility to define further
attribute values for all information elements owning enumerated
attribute lists as well as to extend the main structures 'pop',
'setup', 'support' and 'provider' by additional information elements.
Therefore the specification of the roaming phone book can be adopted
to future requirements without changing this document. Extensions
and refinements to this specification can be achieved by registration
of new elements and attributes by IANA.
Extending this specification with additional attributes or elements
must not change the validity of documents based on an older version
of the XML DTD. Therefore all added information elements must be
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optional, prohibiting the mandatory inclusion of newly defined
information elements. Adding new values to enumerated attribute
lists has no backward compatibility constraints because it does not
harm the validity of attributes already defined.
To facilitate the registration of new information elements and
attribute values the DTD of the phone book has been separated in two
parts, the extensible part containing only parameter entity
declarations for ease inclusion of new values, and the fixed part
containing the detailed specification of the content and structure of
the phone book. By referencing the parameter entity declarations in
the fixed part of the specification the whole phone book becomes
extensible.
The part containing the parameter entity declarations has to be
maintained by the IANA. There are two different classes of
declarations in this part requiring different policies for
registering new values.
<span class="h3"><a class="selflink" id="section-9.1" href="#section-9.1">9.1</a>. Registration of new attribute values</span>
The entities 'addressFamily', 'modemProtocols', 'isdnProtocols',
'atmProtocols', 'frProtocols', 'x25Protocols', 'popProperties' and
'tunnelingProtocols' are describing enumerated attribute value lists.
Because there is no limitation in the name space of these attribute
values and newly defined attribute values can not harm the validity
of existing values, new attribute values can be assigned by
Specification Required [<a href="#ref-6" title="">6</a>].
<span class="h3"><a class="selflink" id="section-9.2" href="#section-9.2">9.2</a>. Registration of new information elements</span>
The entities 'mediaTypes', 'popInformation', 'setupInformation', '
supportInformation' and 'providerInformation' define the information
elements probably included in the media, pop, setup, support and
provider elements. Inserting new values into these lists extends the
phone book by arbitrarily new information elements. Inappropriate
use of the XML content model can destroy the backward compatibility
of the DTD. Therefore the assignment of new information elements
requires the approval of a Designated Expert [<a href="#ref-6" title="">6</a>]. In addition to the
insertion of a new value into the list, the detailed definition of
the information element has to be appended to the specification part
maintained by the IANA.
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<span class="h2"><a class="selflink" id="section-10" href="#section-10">10</a>. References</span>
[<a id="ref-1">1</a>] Bradner, S., "Key words for use in RFCs to Indicate Requirement
Levels", <a href="https://www.rfc-editor.org/bcp/bcp14">BCP 14</a>, <a href="./rfc2119">RFC 2119</a>, March 1997.
[<a id="ref-2">2</a>] Reynolds, J. and J. Postel, "ASSIGNED NUMBERS", STD 2, <a href="./rfc1700">RFC 1700</a>,
October 1994.
[<a id="ref-3">3</a>] Barker, P. and S. Kille, "The COSINE and Internet X.500 Schema",
<a href="./rfc1274">RFC 1274</a>, November 1991.
[<a id="ref-4">4</a>] ITU Rec. E.123, "Notation for national and international
telephone numbers", 1988.
[<a id="ref-5">5</a>] "Extensible Markup Language (XML) 1.0" W3C Recommendation 10-
February-1998 <a href="http://www.w3.org/TR/1998/REC-xml-19980210">http://www.w3.org/TR/1998/REC-xml-19980210</a>
[<a id="ref-6">6</a>] Narten, T. and H. Alvestrand, "Guidelines for Writing an IANA
Considerations Section in RFCs", <a href="https://www.rfc-editor.org/bcp/bcp26">BCP 26</a>, <a href="./rfc2434">RFC 2434</a>, October 1998.
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<span class="h2"><a class="selflink" id="section-11" href="#section-11">11</a>. Appendix: Examples</span>
<span class="h3"><a class="selflink" id="section-11.1" href="#section-11.1">11.1</a>. The most simple example</span>
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE phoneBook SYSTEM "roamPhoneBook.dtd">
<phoneBook name="minimalExample" version="1">
<pop entryVersion="1">
<address family="E164">+1 234 5678901</address>
<media><viaMODEM/></media>
</pop>
</phoneBook>
<span class="h3"><a class="selflink" id="section-11.2" href="#section-11.2">11.2</a>. A more comprehensive example</span>
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE phoneBook SYSTEM "roamPhoneBook.dtd">
<phoneBook name="KNF_simple" version="1">
<pop entryVersion="1">
<address family="E164" countryCode="49">+49913130540</address>
<media>
<viaMODEM type="V90"/>
<viaMODEM type="V34B"/>
<viaISDN type="HDLC"/>
</media>
<setup>
<dnsServerAddress>192.168.147.5</dnsServerAddress>
<dnsServerAddress>193.175.24.33</dnsServerAddress>
</setup>
</pop>
<support id="KNF_main" language="EN DE">
<supportMailtoURL>mailto:[email protected]</supportMailtoURL>
<supportTelephoneNumber>+499123968066</supportTelephoneNumber>
</support>
</phoneBook>
<span class="h2"><a class="selflink" id="section-12" href="#section-12">12</a>. Acknowledgments</span>
Thanks to Pat Calhoun, Bernard Aboba, Jay Farhat, Butch Anton,
Quentin Miller, and Ken Crocker for salient input and review.
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<span class="h2"><a class="selflink" id="section-13" href="#section-13">13</a>. Authors' Addresses</span>
Questions about this memo can be directed to:
Max Riegel
Siemens AG
Hofmannstr. 51
Munich, 81359
Germany
Phone: +49 89 722 49557
EMail: [email protected]
Glen Zorn
Cisco Systems, Inc.
500 108th Avenue N.E., Suite 500
Bellevue, WA 98004
USA
Phone: +1 425 438 8218
EMail: [email protected]
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<span class="h2"><a class="selflink" id="section-14" href="#section-14">14</a>. Full Copyright Statement</span>
Copyright (C) The Internet Society (2000). All Rights Reserved.
This document and translations of it may be copied and furnished to
others, and derivative works that comment on or otherwise explain it
or assist in its implementation may be prepared, copied, published
and distributed, in whole or in part, without restriction of any
kind, provided that the above copyright notice and this paragraph are
included on all such copies and derivative works. However, this
document itself may not be modified in any way, such as by removing
the copyright notice or references to the Internet Society or other
Internet organizations, except as needed for the purpose of
developing Internet standards in which case the procedures for
copyrights defined in the Internet Standards process must be
followed, or as required to translate it into languages other than
English.
The limited permissions granted above are perpetual and will not be
revoked by the Internet Society or its successors or assigns.
This document and the information contained herein is provided on an
"AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
Acknowledgement
Funding for the RFC Editor function is currently provided by the
Internet Society.
Riegel & Zorn Standards Track [Page 33]
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