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Network Working Group                                          A. Newton
Request for Comments: 4991                                VeriSign, Inc.
Category: Standards Track                                    August 2007

Network Working Group A. Newton Request for Comments: 4991 VeriSign, Inc. Category: Standards Track August 2007

       A Common Schema for Internet Registry Information Service
                           Transfer Protocols

A Common Schema for Internet Registry Information Service Transfer Protocols

Status of This Memo

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.

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 Notice

   Copyright (C) The IETF Trust (2007).

Copyright (C) The IETF Trust (2007).

Abstract

Abstract

   This document describes an XML Schema for use by Internet Registry
   Information Service (IRIS) application transfer protocols that share
   common characteristics.  It describes common information about the
   transfer protocol, such as version, supported extensions, and
   supported security mechanisms.

This document describes an XML Schema for use by Internet Registry Information Service (IRIS) application transfer protocols that share common characteristics. It describes common information about the transfer protocol, such as version, supported extensions, and supported security mechanisms.

Table of Contents

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  2
   2.  Document Terminology . . . . . . . . . . . . . . . . . . . . .  2
   3.  Formal XML Syntax  . . . . . . . . . . . . . . . . . . . . . .  3
   4.  Version Information  . . . . . . . . . . . . . . . . . . . . .  6
   5.  Size Information . . . . . . . . . . . . . . . . . . . . . . .  7
   6.  Authentication Success Information . . . . . . . . . . . . . .  8
   7.  Authentication Failure Information . . . . . . . . . . . . . .  8
   8.  Other Information  . . . . . . . . . . . . . . . . . . . . . .  9
   9.  Internationalization Considerations  . . . . . . . . . . . . .  9
   10. IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 10
     10.1.  XML Namespace URN Registration  . . . . . . . . . . . . . 10
   11. Security Considerations  . . . . . . . . . . . . . . . . . . . 10
   12. References . . . . . . . . . . . . . . . . . . . . . . . . . . 11
     12.1.  Normative References  . . . . . . . . . . . . . . . . . . 11
     12.2.  Informative References  . . . . . . . . . . . . . . . . . 11
   Appendix A.  Contributors  . . . . . . . . . . . . . . . . . . . . 12

1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Document Terminology . . . . . . . . . . . . . . . . . . . . . 2 3. Formal XML Syntax . . . . . . . . . . . . . . . . . . . . . . 3 4. Version Information . . . . . . . . . . . . . . . . . . . . . 6 5. Size Information . . . . . . . . . . . . . . . . . . . . . . . 7 6. Authentication Success Information . . . . . . . . . . . . . . 8 7. Authentication Failure Information . . . . . . . . . . . . . . 8 8. Other Information . . . . . . . . . . . . . . . . . . . . . . 9 9. Internationalization Considerations . . . . . . . . . . . . . 9 10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 10 10.1. XML Namespace URN Registration . . . . . . . . . . . . . 10 11. Security Considerations . . . . . . . . . . . . . . . . . . . 10 12. References . . . . . . . . . . . . . . . . . . . . . . . . . . 11 12.1. Normative References . . . . . . . . . . . . . . . . . . 11 12.2. Informative References . . . . . . . . . . . . . . . . . 11 Appendix A. Contributors . . . . . . . . . . . . . . . . . . . . 12

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1.  Introduction

1. Introduction

   IRIS [8] has two transfer protocols, LWZ (lightweight using
   compression) [9] and XPC (XML pipelining with chunks) [10], that
   share common negotiation mechanisms.  Both transfer protocols have a
   need for the server to provide rich status information to clients
   during protocol negotiation.  In many cases, this status information
   would be too complex to describe using simple bit fields and length-
   specified octet sequences.  This document defines an XML Schema for
   this rich status information and describes the usage of conformant
   XML for conveying this status information.

IRIS [8] has two transfer protocols, LWZ (lightweight using compression) [9] and XPC (XML pipelining with chunks) [10], that share common negotiation mechanisms. Both transfer protocols have a need for the server to provide rich status information to clients during protocol negotiation. In many cases, this status information would be too complex to describe using simple bit fields and length- specified octet sequences. This document defines an XML Schema for this rich status information and describes the usage of conformant XML for conveying this status information.

   This document defines five types of information used in the
   negotiation of protocol capabilities: version, size, authentication
   success, authentication failure, and other information.  The version
   information is used to negotiate the versions and extensions to the
   transfer protocol, the application operations protocol, and data
   models used by the application operations.  Size information is used
   to indicate request and response size capabilities and errors.
   Authentication success and failure information is used to indicate
   the outcome of an authentication action.  Other types of information
   may also be conveyed that is generally a result of an error but
   cannot be corrected through defined protocol behavior.

This document defines five types of information used in the negotiation of protocol capabilities: version, size, authentication success, authentication failure, and other information. The version information is used to negotiate the versions and extensions to the transfer protocol, the application operations protocol, and data models used by the application operations. Size information is used to indicate request and response size capabilities and errors. Authentication success and failure information is used to indicate the outcome of an authentication action. Other types of information may also be conveyed that is generally a result of an error but cannot be corrected through defined protocol behavior.

   As an example, upon initiation of a connection, a server may send
   version information informing the client of the data models supported
   by the server and the security mechanisms supported by the server.
   The client may then respond appropriately.  For example, the client
   may not recognize any of the data models supported by the server, and
   therefore close the connection.  On the other hand, the client may
   recognize the data models and the security mechanisms and begin the
   procedure to initialize a security mechanism with the server before
   proceeding to query data according to a recognized data model.

As an example, upon initiation of a connection, a server may send version information informing the client of the data models supported by the server and the security mechanisms supported by the server. The client may then respond appropriately. For example, the client may not recognize any of the data models supported by the server, and therefore close the connection. On the other hand, the client may recognize the data models and the security mechanisms and begin the procedure to initialize a security mechanism with the server before proceeding to query data according to a recognized data model.

   Both LWZ [9] and XPC [10] provide examples of the usage of the XML
   Schema defined in this document.

Both LWZ [9] and XPC [10] provide examples of the usage of the XML Schema defined in this document.

2.  Document Terminology

2. Document Terminology

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [6].

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 [6].

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3.  Formal XML Syntax

3. Formal XML Syntax

   The following is the XML Schema used to define transfer protocol
   status information.  See the following specifications: [2], [3], [4],
   [5].  Updates or changes to this schema require a document that
   UPDATES or OBSOLETES this document.

The following is the XML Schema used to define transfer protocol status information. See the following specifications: [2], [3], [4], [5]. Updates or changes to this schema require a document that UPDATES or OBSOLETES this document.

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

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

   <annotation>
     <documentation>
       A schema for describing status information
       for use by multiple transfer protocols.
     </documentation>
   </annotation>

<annotation> <documentation> A schema for describing status information for use by multiple transfer protocols. </documentation> </annotation>

   <element name="versions">
     <complexType>
       <sequence>
         <element name="transferProtocol" maxOccurs="unbounded">
           <complexType>
             <sequence>
               <element name="application" minOccurs="0"
                 maxOccurs="unbounded">
                 <complexType>
                   <sequence>
                     <element name="dataModel" minOccurs="0"
                       maxOccurs="unbounded">
                       <complexType>
                         <attribute name="protocolId" type="token"
                           use="required" />
                         <attribute name="extensionIds"
                           type="normalizedString" />
                       </complexType>
                     </element>
                   </sequence>
                   <attribute name="protocolId" type="token"
                     use="required" />
                   <attribute name="extensionIds"
                     type="normalizedString" />
                 </complexType>
               </element>
             </sequence>
             <attribute name="protocolId" type="token" use="required"

<element name="versions"> <complexType> <sequence> <element name="transferProtocol" maxOccurs="unbounded"> <complexType> <sequence> <element name="application" minOccurs="0" maxOccurs="unbounded"> <complexType> <sequence> <element name="dataModel" minOccurs="0" maxOccurs="unbounded"> <complexType> <attribute name="protocolId" type="token" use="required" /> <attribute name="extensionIds" type="normalizedString" /> </complexType> </element> </sequence> <attribute name="protocolId" type="token" use="required" /> <attribute name="extensionIds" type="normalizedString" /> </complexType> </element> </sequence> <attribute name="protocolId" type="token" use="required"

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               />
             <attribute name="extensionIds" type="normalizedString" />
             <attribute name="authenticationIds"
               type="normalizedString" />
             <attribute name="responseSizeOctets"
               type="positiveInteger" />
             <attribute name="requestSizeOctets"
               type="positiveInteger" />
           </complexType>
         </element>
       </sequence>
     </complexType>
   </element>

/> <attribute name="extensionIds" type="normalizedString" /> <attribute name="authenticationIds" type="normalizedString" /> <attribute name="responseSizeOctets" type="positiveInteger" /> <attribute name="requestSizeOctets" type="positiveInteger" /> </complexType> </element> </sequence> </complexType> </element>

   <element name="size">
     <complexType>
       <sequence>
         <element name="request"
           minOccurs="0"
           type="iristrans:octetsType" />
         <element name="response"
           minOccurs="0"
           type="iristrans:octetsType" />
       </sequence>
     </complexType>
   </element>

<element name="size"> <complexType> <sequence> <element name="request" minOccurs="0" type="iristrans:octetsType" /> <element name="response" minOccurs="0" type="iristrans:octetsType" /> </sequence> </complexType> </element>

   <complexType name="octetsType">
     <choice>
       <element name="exceedsMaximum">
         <complexType/>
       </element>
       <element name="octets" type="positiveInteger" />
     </choice>
   </complexType>

<complexType name="octetsType"> <choice> <element name="exceedsMaximum"> <complexType/> </element> <element name="octets" type="positiveInteger" /> </choice> </complexType>

   <element name="authenticationSuccess">
     <complexType>
       <sequence>
         <element name="description" minOccurs="0"
           maxOccurs="unbounded">
           <complexType>
             <simpleContent>
               <extension base="string">
                 <attribute name="language" type="language"
                   use="required"/>
               </extension>
             </simpleContent>

<element name="authenticationSuccess"> <complexType> <sequence> <element name="description" minOccurs="0" maxOccurs="unbounded"> <complexType> <simpleContent> <extension base="string"> <attribute name="language" type="language" use="required"/> </extension> </simpleContent>

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           </complexType>
         </element>
         <element name="data" minOccurs="0" maxOccurs="1"
           type="base64Binary"/>
       </sequence>
     </complexType>
   </element>

</complexType> </element> <element name="data" minOccurs="0" maxOccurs="1" type="base64Binary"/> </sequence> </complexType> </element>

   <element name="authenticationFailure">
     <complexType>
       <sequence>
         <element name="description" minOccurs="0"
           maxOccurs="unbounded">
           <complexType>
             <simpleContent>
               <extension base="string">
                 <attribute name="language" type="language"
                   use="required"/>
               </extension>
             </simpleContent>
           </complexType>
         </element>
       </sequence>
     </complexType>
   </element>

<element name="authenticationFailure"> <complexType> <sequence> <element name="description" minOccurs="0" maxOccurs="unbounded"> <complexType> <simpleContent> <extension base="string"> <attribute name="language" type="language" use="required"/> </extension> </simpleContent> </complexType> </element> </sequence> </complexType> </element>

   <element name="other">
     <complexType>
       <sequence>
         <element name="description" minOccurs="0"
           maxOccurs="unbounded">
           <complexType>
             <simpleContent>
               <extension base="string">
                 <attribute name="language" type="language"
                   use="required"/>
               </extension>
             </simpleContent>
           </complexType>
         </element>
       </sequence>
       <attribute type="token" name="type" use="required"/>
     </complexType>
   </element>

<element name="other"> <complexType> <sequence> <element name="description" minOccurs="0" maxOccurs="unbounded"> <complexType> <simpleContent> <extension base="string"> <attribute name="language" type="language" use="required"/> </extension> </simpleContent> </complexType> </element> </sequence> <attribute type="token" name="type" use="required"/> </complexType> </element>

   </schema>

</schema>

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4.  Version Information

4. Version Information

   The <versions> element is used to describe version information about
   the transfer protocol, the application protocol, and data models used
   by the application protocol.

The <versions> element is used to describe version information about the transfer protocol, the application protocol, and data models used by the application protocol.

   The <versions> element has one or more <transferProtocol> child
   elements. <transferProtocol> elements have zero or more <application>
   child elements.  And <application> elements have zero or more
   <dataModel> elements.  Each of these element types has a 'protocolId'
   attribute identifying the protocol they represent and an optional
   'extensionIds' attribute identifying the protocol extensions they
   support.

The <versions> element has one or more <transferProtocol> child elements. <transferProtocol> elements have zero or more <application> child elements. And <application> elements have zero or more <dataModel> elements. Each of these element types has a 'protocolId' attribute identifying the protocol they represent and an optional 'extensionIds' attribute identifying the protocol extensions they support.

   During capabilities negotiation, it is expected that both sides of
   the negotiation recognize the 'protocolId' value of the
   <transferProtocol> element and at least one of the <application> and
   <dataModel> elements.  If the negotiation produces a situation where
   this is not possible, an error SHOULD be given and communication
   ended.  It is not expected that each side must recognize the
   'extensionIds' values, and unrecognized 'extensionIds' values MUST be
   ignored.

During capabilities negotiation, it is expected that both sides of the negotiation recognize the 'protocolId' value of the <transferProtocol> element and at least one of the <application> and <dataModel> elements. If the negotiation produces a situation where this is not possible, an error SHOULD be given and communication ended. It is not expected that each side must recognize the 'extensionIds' values, and unrecognized 'extensionIds' values MUST be ignored.

   Additionally, the <transferProtocol> element has optional
   'authenticationIds', 'responseSizeOctets', and 'requestSizeOctets'
   attributes.  The 'authenticationIds' attribute identifies
   authentication mechanisms supported by the associated transfer
   protocol.  The 'responseSizeOctets' attribute describes the maximum
   response size in octets the server will give.  The
   'requestSizeOctets' attribute describes the maximum request size in
   octets the server will accept.

Additionally, the <transferProtocol> element has optional 'authenticationIds', 'responseSizeOctets', and 'requestSizeOctets' attributes. The 'authenticationIds' attribute identifies authentication mechanisms supported by the associated transfer protocol. The 'responseSizeOctets' attribute describes the maximum response size in octets the server will give. The 'requestSizeOctets' attribute describes the maximum request size in octets the server will accept.

   The protocol, extension, and authentication mechanism identifiers are
   of no specific type, and this document defines none.  Specifications
   using this XML Schema MUST define the identifiers for use with the
   <versions> element and its children.

The protocol, extension, and authentication mechanism identifiers are of no specific type, and this document defines none. Specifications using this XML Schema MUST define the identifiers for use with the <versions> element and its children.

   The meaning of octets for the transfer of data is counted in
   different ways for different transfer protocols.  Some transfer
   protocols need only to specify the octets of the data being
   transferred, while other transfer protocols need to account for
   additional octets used to transfer the data.  Specifications using
   this XML Schema MUST describe how these octet counts are calculated.

The meaning of octets for the transfer of data is counted in different ways for different transfer protocols. Some transfer protocols need only to specify the octets of the data being transferred, while other transfer protocols need to account for additional octets used to transfer the data. Specifications using this XML Schema MUST describe how these octet counts are calculated.

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   The following is example XML describing version information.

The following is example XML describing version information.

   <versions xmlns="urn:ietf:params:xml:ns:iris-transport">
     <transferProtocol protocolId="iris.lwz"
       authenticationIds="PLAIN EXTERNAL">
       <application protocolId="urn:ietf:params:xml:ns:iris1"
         extensionIds="http://example.com/SIMPLEBAG">
         <dataModel protocolId="urn:ietf:params:xml:ns:dchk1"/>
         <dataModel protocolId="urn:ietf:params:xml:ns:dreg1"/>
       </application>
     </transferProtocol>
   </versions>

<versions xmlns="urn:ietf:params:xml:ns:iris-transport"> <transferProtocol protocolId="iris.lwz" authenticationIds="PLAIN EXTERNAL"> <application protocolId="urn:ietf:params:xml:ns:iris1" extensionIds="http://example.com/SIMPLEBAG"> <dataModel protocolId="urn:ietf:params:xml:ns:dchk1"/> <dataModel protocolId="urn:ietf:params:xml:ns:dreg1"/> </application> </transferProtocol> </versions>

                        Version Information Example

Version Information Example

5.  Size Information

5. Size Information

   The <size> element provides a means for a server to communicate to a
   client that a given request has exceeded a negotiated size
   (<request>) or that a response to a given request will exceed a
   negotiated size (<response>).

The <size> element provides a means for a server to communicate to a client that a given request has exceeded a negotiated size (<request>) or that a response to a given request will exceed a negotiated size (<response>).

   A server may indicate one of two size conditions by specifying the
   following child elements:

A server may indicate one of two size conditions by specifying the following child elements:

      <exceedsMaximum> - this child element simply indicates that the
      size exceeded the negotiated size.

<exceedsMaximum> - this child element simply indicates that the size exceeded the negotiated size.

      <octets> - this child element indicates that the size exceeded the
      negotiated size and conveys the number of octets that is the
      maximum for a request if the parent element is a <request> element
      or the number of octets needed to provide the response if the
      parent element is a <response> element.

<octets> - this child element indicates that the size exceeded the negotiated size and conveys the number of octets that is the maximum for a request if the parent element is a <request> element or the number of octets needed to provide the response if the parent element is a <response> element.

   The meaning of octets for the transfer of data is counted in
   different ways for different transfer protocols.  Some transfer
   protocols need only to specify the octets of the data being
   transferred, while other transfer protocols need to account for
   additional octets used to transfer the data.  Specifications using
   this XML Schema MUST describe how these octet counts are calculated.

The meaning of octets for the transfer of data is counted in different ways for different transfer protocols. Some transfer protocols need only to specify the octets of the data being transferred, while other transfer protocols need to account for additional octets used to transfer the data. Specifications using this XML Schema MUST describe how these octet counts are calculated.

   The following is example XML describing size information.

The following is example XML describing size information.

   <size xmlns="urn:ietf:params:xml:ns:iris-transport">
     <response>
       <octets>1211</octets>
     </response>
   </size>

<size xmlns="urn:ietf:params:xml:ns:iris-transport"> <response> <octets>1211</octets> </response> </size>

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                         Size Information Example

Size Information Example

6.  Authentication Success Information

6. Authentication Success Information

   The <authenticationSuccess> element indicates that a client has
   successfully authenticated to a server.  Along with this indication,
   it can provide text that may be presented to a user with regard to
   this successful authentication using child <description> elements.

The <authenticationSuccess> element indicates that a client has successfully authenticated to a server. Along with this indication, it can provide text that may be presented to a user with regard to this successful authentication using child <description> elements.

   Each <description> element MUST have a 'language' attribute
   describing the language of the content of the <description> element.
   Clients are not expected to concatenate multiple descriptions;
   therefore, servers MUST NOT provide multiple <description> elements
   with the same language descriptor.

Each <description> element MUST have a 'language' attribute describing the language of the content of the <description> element. Clients are not expected to concatenate multiple descriptions; therefore, servers MUST NOT provide multiple <description> elements with the same language descriptor.

   Finally, additional security data may be sent back with the
   authentication success message using the <data> element.  The content
   of this element is of the base64Binary simple type.

Finally, additional security data may be sent back with the authentication success message using the <data> element. The content of this element is of the base64Binary simple type.

   The following is example XML describing authentication success
   information.

The following is example XML describing authentication success information.

   <authenticationSuccess
     xmlns="urn:ietf:params:xml:ns:iris-transport">
     <description language="en">
       user 'bob' authenticates via password
     </description>
   </authenticationSuccess>

<authenticationSuccess xmlns="urn:ietf:params:xml:ns:iris-transport"> <description language="en"> user 'bob' authenticates via password </description> </authenticationSuccess>

                      Authentication Success Example

Authentication Success Example

7.  Authentication Failure Information

7. Authentication Failure Information

   The <authenticationFailure> element indicates that a client has
   failed to properly authenticate to a server.  Along with this
   indication, it can provide text that may be presented to a user with
   regard to this authentication failure using child <description>
   elements.

The <authenticationFailure> element indicates that a client has failed to properly authenticate to a server. Along with this indication, it can provide text that may be presented to a user with regard to this authentication failure using child <description> elements.

   Each <description> element MUST have a 'language' attribute
   describing the language of the content of the <description> element.
   Clients are not expected to concatenate multiple descriptions;
   therefore, servers MUST NOT provide multiple <description> elements
   with the same language descriptor.

Each <description> element MUST have a 'language' attribute describing the language of the content of the <description> element. Clients are not expected to concatenate multiple descriptions; therefore, servers MUST NOT provide multiple <description> elements with the same language descriptor.

   The following is example XML describing authentication failure
   information.

The following is example XML describing authentication failure information.

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   <authenticationFailure
     xmlns="urn:ietf:params:xml:ns:iris-transport">
     <description language="en">
       please consult your admin if you have forgotten your password
     </description>
   </authenticationFailure>

<authenticationFailure xmlns="urn:ietf:params:xml:ns:iris-transport"> <description language="en"> please consult your admin if you have forgotten your password </description> </authenticationFailure>

                      Authentication Failure Example

Authentication Failure Example

8.  Other Information

8. Other Information

   The <other> element conveys status information that may require
   interpretation by a human to be meaningful.  This element has a
   required 'type' attribute, which contains an identifier regarding the
   nature of the information.  This document does not define any
   identifiers for use in this attribute, but the intent is that these
   identifiers are well-known so that clients may take different classes
   of action based on the content of this attribute.  Therefore,
   specifications making use of this XML Schema MUST define these
   identifiers.

The <other> element conveys status information that may require interpretation by a human to be meaningful. This element has a required 'type' attribute, which contains an identifier regarding the nature of the information. This document does not define any identifiers for use in this attribute, but the intent is that these identifiers are well-known so that clients may take different classes of action based on the content of this attribute. Therefore, specifications making use of this XML Schema MUST define these identifiers.

   The <other> element may have zero or more <description> elements.
   Each <description> element MUST have a 'language' attribute
   describing the language of the content of the <description> element.
   Servers may use these child elements to convey textual information to
   clients regarding the class (or type) of status information being
   specified by the <other> element.  Clients are not expected to
   concatenate multiple descriptions; therefore, servers MUST NOT
   provide multiple <description> elements with the same language
   descriptor.

The <other> element may have zero or more <description> elements. Each <description> element MUST have a 'language' attribute describing the language of the content of the <description> element. Servers may use these child elements to convey textual information to clients regarding the class (or type) of status information being specified by the <other> element. Clients are not expected to concatenate multiple descriptions; therefore, servers MUST NOT provide multiple <description> elements with the same language descriptor.

   The following is example XML describing other information.

The following is example XML describing other information.

   <other xmlns="urn:ietf:params:xml:ns:iris-transport" type="system">
     <description language="en">unavailable, come back
       later</description>
   </other>

<other xmlns="urn:ietf:params:xml:ns:iris-transport" type="system"> <description language="en">unavailable, come back later</description> </other>

                         Other Information Example

Other Information Example

9.  Internationalization Considerations

9. Internationalization Considerations

   XML processors are obliged to recognize both UTF-8 and UTF-16 [1]
   encodings.  XML provides for mechanisms to identify and use other
   character encodings.  Application transfer protocols MUST define
   which additional character encodings, if any, are to be allowed in
   the use of the XML defined in this document.

XML processors are obliged to recognize both UTF-8 and UTF-16 [1] encodings. XML provides for mechanisms to identify and use other character encodings. Application transfer protocols MUST define which additional character encodings, if any, are to be allowed in the use of the XML defined in this document.

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10.  IANA Considerations

10. IANA Considerations

10.1.  XML Namespace URN Registration

10.1. XML Namespace URN Registration

   This document makes use of the XML namespace and schema registry
   specified in XML_URN [7].  Accordingly, the following registrations
   have been made by IANA:

This document makes use of the XML namespace and schema registry specified in XML_URN [7]. Accordingly, the following registrations have been made by IANA:

   o  XML Namespace URN/URI:

o XML Namespace URN/URI:

      *  urn:ietf:params:xml:ns:iris-transport

* urn:ietf:params:xml:ns:iris-transport

   o  Contact:

o Contact:

      *  Andrew Newton <andy@hxr.us>

* Andrew Newton <andy@hxr.us>

   o  XML:

o XML:

      *  None

* None

   o  XML Schema URN/URI:

o XML Schema URN/URI:

      *  urn:ietf:params:xml:schema:iris-transport

* urn:ietf:params:xml:schema:iris-transport

   o  Contact:

o Contact:

      *  Andrew Newton <andy@hxr.us>

* Andrew Newton <andy@hxr.us>

   o  XML:

o XML:

      *  The XML Schema specified in Section 3

* The XML Schema specified in Section 3

11.  Security Considerations

11. Security Considerations

   Transfer protocols using XML conformant to the XML Schema in this
   document and offering security properties such as authentication and
   confidentiality SHOULD offer an initial message from the server to
   the client using the <versions> element.  This <versions> element
   SHOULD contain all relevant authentication identifiers in its
   'authenticationId' attribute.  The purpose of providing this initial
   message is to help thwart downgrade attacks.

Transfer protocols using XML conformant to the XML Schema in this document and offering security properties such as authentication and confidentiality SHOULD offer an initial message from the server to the client using the <versions> element. This <versions> element SHOULD contain all relevant authentication identifiers in its 'authenticationId' attribute. The purpose of providing this initial message is to help thwart downgrade attacks.

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12.  References

12. References

12.1.  Normative References

12.1. Normative References

   [1]   The Unicode Consortium, "The Unicode Standard, Version 3", ISBN
         0-201-61633-5, 2000, <The Unicode Standard, Version 3>.

[1] The Unicode Consortium, "The Unicode Standard, Version 3", ISBN 0-201-61633-5, 2000, <The Unicode Standard, Version 3>.

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

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

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

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

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

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

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

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

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

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

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

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

12.2.  Informative References

12.2. Informative References

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

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

   [9]   Newton, A., "A Lightweight UDP Transfer Protocol for the
         Internet Registry Information Service", RFC 4993, August 2007.

[9] Newton, A., "A Lightweight UDP Transfer Protocol for the Internet Registry Information Service", RFC 4993, August 2007.

   [10]  Newton, A., "XML Pipelining with Chunks for the Internet
         Registry Information Service", RFC 4992, August 2007.

[10] Newton, A., "XML Pipelining with Chunks for the Internet Registry Information Service", RFC 4992, August 2007.

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Appendix A.  Contributors

Appendix A. Contributors

   Substantive contributions to this document have been provided by the
   members of the IETF's CRISP Working Group, especially Robert
   Martin-Legene, Milena Caires, and David Blacka.

Substantive contributions to this document have been provided by the members of the IETF's CRISP Working Group, especially Robert Martin-Legene, Milena Caires, and David Blacka.

Author's Address

Author's Address

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

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

   Phone: +1 703 948 3382
   EMail: andy@hxr.us
   URI:   http://www.verisignlabs.com/

Phone: +1 703 948 3382 EMail: andy@hxr.us URI: http://www.verisignlabs.com/

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Full Copyright Statement

Full Copyright Statement

   Copyright (C) The IETF Trust (2007).

Copyright (C) The IETF Trust (2007).

   This document is subject to the rights, licenses and restrictions
   contained in BCP 78, and except as set forth therein, the authors
   retain all their rights.

This document is subject to the rights, licenses and restrictions contained in BCP 78, and except as set forth therein, the authors retain all their rights.

   This document and the information contained herein are provided on an
   "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS
   OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY, THE IETF TRUST AND
   THE INTERNET ENGINEERING TASK FORCE DISCLAIM 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.

このドキュメントとここに含まれた情報はその人が代理をするか、または(もしあれば)後援される組織、インターネットの振興発展を目的とする組織、「そのままで」という基礎と貢献者の上で提供していて、IETFはそして、インターネット・エンジニアリング・タスク・フォースがすべての保証を放棄すると信じます、急行である、または暗示していて、他を含んでいて、情報の使用がここに侵害しないどんな保証も少しもまっすぐになるということであるかいずれが市場性か特定目的への適合性の黙示的な保証です。

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知的所有権

   The IETF takes no position regarding the validity or scope of any
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   this document or the extent to which any license under such rights
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   found in BCP 78 and BCP 79.

IETFはどんなIntellectual Property Rightsの正当性か範囲、実現に関係すると主張されるかもしれない他の権利、本書では説明された技術の使用またはそのような権利の下におけるどんなライセンスも利用可能であるかもしれない、または利用可能でないかもしれない範囲に関しても立場を全く取りません。 または、それはそれを表しません。どんなそのような権利も特定するためのどんな独立している努力もしました。 BCP78とBCP79でRFCドキュメントの権利に関する手順に関する情報を見つけることができます。

   Copies of IPR disclosures made to the IETF Secretariat and any
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   attempt made to obtain a general license or permission for the use of
   such proprietary rights by implementers or users of this
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   http://www.ietf.org/ipr.

IPR公開のコピーが利用可能に作られるべきライセンスの保証、または一般的な免許を取得するのが作られた試みの結果をIETF事務局といずれにもしたか、または http://www.ietf.org/ipr のIETFのオンラインIPR倉庫からこの仕様のimplementersかユーザによるそのような所有権の使用のために許可を得ることができます。

   The IETF invites any interested party to bring to its attention any
   copyrights, patents or patent applications, or other proprietary
   rights that may cover technology that may be required to implement
   this standard.  Please address the information to the IETF at
   ietf-ipr@ietf.org.

IETFはこの規格を実行するのに必要であるかもしれない技術をカバーするかもしれないどんな著作権もその注目していただくどんな利害関係者、特許、特許出願、または他の所有権も招待します。 ietf-ipr@ietf.org のIETFに情報を記述してください。

Acknowledgement

承認

   Funding for the RFC Editor function is currently provided by the
   Internet Society.

RFC Editor機能のための基金は現在、インターネット協会によって提供されます。

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ニュートン標準化過程[13ページ]