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</style><link charset="utf-8" type="text/css" rel="stylesheet" href="http://www.w3.org/StyleSheets/TR/W3C-WD"></head>
  <body style="display: inherit;"><div class="head"><p><a href="http://www.w3.org/"><img src="http://www.w3.org/Icons/w3c_home" alt="W3C" height="48" width="72"></a></p><h1 class="title" id="title">The Messaging API</h1><h2 id="w3c-working-draft-14-april-2011">W3C Working Draft 14 April 2011</h2><dl><dt>This version:</dt><dd><a href="http://www.w3.org/TR/2011/WD-messaging-api-20110414/">http://www.w3.org/TR/2011/WD-messaging-api-20110414/</a></dd><dt>Latest published version:</dt><dd><a href="http://www.w3.org/TR/messaging-api/">http://www.w3.org/TR/messaging-api/</a></dd><dt>Latest editor's draft:</dt><dd><a href="http://dev.w3.org/2009/dap/messaging/">http://dev.w3.org/2009/dap/messaging/</a></dd><dt>Previous version:</dt><dd><a href="http://www.w3.org/TR/2011/WD-messaging-api-20110120/">http://www.w3.org/TR/2011/WD-messaging-api-20110120/</a></dd><dt>Editors:</dt><dd><span>Dominique Hazaël-Massieux</span>, W3C</dd>
<dd><span>Suresh Chitturi</span>, Research in Motion (RIM)</dd>
<dd><span>Max Froumentin</span>, Opera</dd>
<dd><span>Maria Angeles Oteo</span>, Telefonica</dd>
<dd><span>Niklas Widell</span>, Ericsson AB</dd>
</dl><p class="copyright"><a href="http://www.w3.org/Consortium/Legal/ipr-notice#Copyright">Copyright</a> © 2011 <a href="http://www.w3.org/"><acronym title="World Wide Web Consortium">W3C</acronym></a><sup>®</sup> (<a href="http://www.csail.mit.edu/"><acronym title="Massachusetts Institute of Technology">MIT</acronym></a>, <a href="http://www.ercim.eu/"><acronym title="European Research Consortium for Informatics and Mathematics">ERCIM</acronym></a>, <a href="http://www.keio.ac.jp/">Keio</a>), All Rights Reserved. W3C <a href="http://www.w3.org/Consortium/Legal/ipr-notice#Legal_Disclaimer">liability</a>, <a href="http://www.w3.org/Consortium/Legal/ipr-notice#W3C_Trademarks">trademark</a> and <a href="http://www.w3.org/Consortium/Legal/copyright-documents">document use</a> rules apply.</p><hr></div>
    <div class="introductory section" id="abstract"><h2>Abstract</h2>
      <p>
      This specification defines an API that provides access to messaging functionality in the device, including SMS, MMS and e-mail.
      </p>

    </div><div id="sotd" class="introductory section"><h2>Status of This Document</h2><p><em>This section describes the status of this document at the time of its publication. Other documents may supersede this document. A list of current W3C publications and the latest revision of this technical report can be found in the <a href="http://www.w3.org/TR/">W3C technical reports index</a> at http://www.w3.org/TR/.</em></p>
      <p><strong>This draft proposes a vastly different approach to the <a href="http://www.w3.org/TR/2011/WD-messaging-api-20110120/">previously published version</a>, using URI schemes as a way to address different messaging protocols instead of using separate methods. The group is specifically looking for feedback on which approach is felt like the most useful.</strong></p>
    <p>This document was published by the <a href="http://www.w3.org/2009/dap/">Device APIs and Policy Working Group</a> as a Working Draft. This document is intended to become a W3C Recommendation. If you wish to make comments regarding this document, please send them to <a href="mailto:public-device-apis@w3.org">public-device-apis@w3.org</a> (<a href="mailto:public-device-apis-request@w3.org?subject=subscribe">subscribe</a>, <a href="http://lists.w3.org/Archives/Public/public-device-apis/">archives</a>). All feedback is welcome.</p><p>Publication as a Working Draft does not imply endorsement by the W3C Membership. This is a draft document and may be updated, replaced or obsoleted by other documents at any time. It is inappropriate to cite this document as other than work in progress.</p><p>This document was produced by a group operating under the <a href="http://www.w3.org/Consortium/Patent-Policy-20040205/">5 February 2004 W3C Patent Policy</a>. W3C maintains a <a href="http://www.w3.org/2004/01/pp-impl/43696/status" rel="disclosure">public list of any patent disclosures</a> made in connection with the deliverables of the group; that page also includes instructions for disclosing a patent. An individual who has actual knowledge of a patent which the individual believes contains <a href="http://www.w3.org/Consortium/Patent-Policy-20040205/#def-essential">Essential Claim(s)</a> must disclose the information in accordance with <a href="http://www.w3.org/Consortium/Patent-Policy-20040205/#sec-Disclosure">section 6 of the W3C Patent Policy</a>.</p></div><div class="section" id="toc"><h2 class="introductory">Table of Contents</h2><ul class="toc"><li class="tocline"><a class="tocxref" href="#conformance"><span class="secno">1. </span>Conformance</a></li><li class="tocline"><a class="tocxref" href="#intro"><span class="secno">2. </span>Introduction</a></li><li class="tocline"><a class="tocxref" href="#security-considerations"><span class="secno">3. </span>Security Considerations</a></li><li class="tocline"><a class="tocxref" href="#supported-messaging-types"><span class="secno">4. </span>Supported messaging types</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#sms-specific-concerns"><span class="secno">4.1 </span>SMS specific concerns</a></li></ul></li><li class="tocline"><a class="tocxref" href="#api-description"><span class="secno">5. </span>API Description</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#devicemessaging"><span class="secno">5.1 </span> <span class="idlType formerLink idlType"><code>DeviceMessaging</code></span> </a><ul class="toc"><li class="tocline"><a class="tocxref" href="#methods"><span class="secno">5.1.1 </span>Methods</a></li></ul></li><li class="tocline"><a class="tocxref" href="#messagingerrorcb"><span class="secno">5.2 </span><span class="idlType formerLink idlType"><code>MessagingErrorCB</code></span></a><ul class="toc"><li class="tocline"><a class="tocxref" href="#methods-1"><span class="secno">5.2.1 </span>Methods</a></li></ul></li><li class="tocline"><a class="tocxref" href="#messagingerror"><span class="secno">5.3 </span><span class="idlType formerLink idlType"><code>MessagingError</code></span></a><ul class="toc"><li class="tocline"><a class="tocxref" href="#attributes"><span class="secno">5.3.1 </span>Attributes</a></li><li class="tocline"><a class="tocxref" href="#constants"><span class="secno">5.3.2 </span>Constants</a></li></ul></li></ul></li><li class="tocline"><a class="tocxref" href="#acknowledgements"><span class="secno">A. </span>Acknowledgements</a></li><li class="tocline"><a class="tocxref" href="#references"><span class="secno">B. </span>References</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#normative-references"><span class="secno">B.1 </span>Normative references</a></li><li class="tocline"><a class="tocxref" href="#informative-references"><span class="secno">B.2 </span>Informative references</a></li></ul></li></ul></div>


    <div class="section" id="conformance"><!--OddPage--><h2><span class="secno">1. </span>Conformance</h2><p>As well as sections marked as non-normative, all authoring guidelines, diagrams, examples, and notes in this specification are non-normative. Everything else in this specification is normative.</p>
<p>The key words <em title="must" class="rfc2119">must</em>, <em title="must not" class="rfc2119">must not</em>, <em title="required" class="rfc2119">required</em>, <em title="should" class="rfc2119">should</em>, <em title="should not" class="rfc2119">should not</em>, <em title="recommended" class="rfc2119">recommended</em>, <em title="may" class="rfc2119">may</em>, and <em title="optional" class="rfc2119">optional</em> in this specification are to be interpreted as described in [<cite><a href="#bib-RFC2119" rel="biblioentry" class="bibref">RFC2119</a></cite>].</p>
</div>
    <p>
      This specification defines conformance criteria that apply to a single product:
      <dfn id="dfn-user-agents">
        user agents
      </dfn>
      that implement the interfaces that it contains.
    </p>

    <p class="note">
    Since not all devices will have all messaging functionality (e.g. a phone may have only SMS and MMS while a PC may have only e-mail) there is a need to indicate that conformant implementations need only expose available functionality.
    </p>

	<p>Implementations that use ECMAScript to implement the APIs defined in this specification must implement them in a manner consistent with the ECMAScript Bindings defined in the Web IDL specification [<cite><a href="#bib-WEBIDL" rel="biblioentry" class="bibref">WEBIDL</a></cite>], as this specification uses that specification's terminology.</p>


    <div class="informative section" id="intro">
    <!--OddPage--><h2><span class="secno">2. </span>Introduction</h2><p><em>This section is non-normative.</em></p>
    <p>
    The Messaging API defines a high-level interface to messaging functionality,
    including SMS, MMS and e-mail. It includes APIs to create and send messages.
    </p>
    <p>These APIs complement what <code>sms:</code>, <code>mms:</code>, and <code>mailto:</code> URI schemes provide with:</p>
    <ul>
      <li>the possibility to attach files to messages,</li>
      <li>a callback on success / error when a message is sent.</li>
    </ul>
    <p>The following code extracts illustrate how to create and send messages. </p>
  	<div> <p>
  	Sending an MMS with an attached picture, if device supports it.
  	</p> </div>
<pre class="example sh_javascript_dom sh_sourceCode"><span class="sh_keyword">function</span> <span class="sh_function">successCB</span><span class="sh_symbol">()</span> <span class="sh_cbracket">{</span>
   <span class="sh_predef_func">alert</span><span class="sh_symbol">(</span><span class="sh_string">"The Message has been sent successfully"</span><span class="sh_symbol">);</span>
<span class="sh_cbracket">}</span>

<span class="sh_keyword">function</span> <span class="sh_function">errorCB</span><span class="sh_symbol">(</span>error<span class="sh_symbol">)</span> <span class="sh_cbracket">{</span>
   <span class="sh_predef_func">alert</span><span class="sh_symbol">(</span><span class="sh_string">"The Message could not be sent "</span> <span class="sh_symbol">+</span> error<span class="sh_symbol">.</span>code<span class="sh_symbol">);</span>
<span class="sh_cbracket">}</span>

<span class="sh_keyword">if</span> <span class="sh_symbol">(</span><span class="sh_predef_var">navigator</span><span class="sh_symbol">.</span>device<span class="sh_symbol">.</span>sendMessage<span class="sh_symbol">)</span> <span class="sh_cbracket">{</span>
   picture <span class="sh_symbol">=</span> <span class="sh_predef_var">document</span><span class="sh_symbol">.</span><span class="sh_function">getElementById</span><span class="sh_symbol">(</span><span class="sh_string">'attachment'</span><span class="sh_symbol">).</span>files<span class="sh_symbol">[</span><span class="sh_number">0</span><span class="sh_symbol">];</span>
   <span class="sh_predef_var">navigator</span><span class="sh_symbol">.</span>device<span class="sh_symbol">.</span><span class="sh_function">sendMessage</span><span class="sh_symbol">(</span><span class="sh_string">"mms:+460000000001?body=Welcome%20%to%Atlantis"</span><span class="sh_symbol">,</span> <span class="sh_symbol">[</span>picture<span class="sh_symbol">],</span> successCB<span class="sh_symbol">,</span> errorCB<span class="sh_symbol">);</span>
<span class="sh_cbracket">}</span></pre>

   </div>

    <div class="section" id="security-considerations">
    	<!--OddPage--><h2><span class="secno">3. </span>Security Considerations</h2>
    	  <p>

        The API defined in this specification can be used to create and send messages through different technologies.

        Sending messages usually has an associated cost (especially SMSs and MMSs), hence a conforming implementation of this specification should provide a mechanism that ensures that no message is sent without the user's consent.
                 </p>

         <p>Since the implications of sending a given message may depend on the message attributes (e.g. destination address) and content, the approach used to ensure user’s consent should include the relevant information, typically the type of message and its destination address.</p>
	 <p>A typical (but not required) way of ensuring user’s consent would be to use the same mechanism as the one used when the user click on a link using one the relevant URI schemes, for instance, bringing up the platform messaging application with pre-filled fields and pre-defined attachments.</p>
         <p>In general, user’s consent is expected to be confirmed for each invocation of the <code>sendMessage</code> methods.</p>
      </div>


    <div class="section" id="supported-messaging-types">
    	<!--OddPage--><h2><span class="secno">4. </span>Supported messaging types</h2>
		<p>The specification supports sending messages on top of protocols for which a URI scheme has been defined, including SMS, MMS and emails.</p>
		<p></p>

			<p class="issue">Using a single method to send message across many protocols make it impossible to detect whether a given user agent supports a specific messaging protocol.</p>


		<div class="section" id="sms-specific-concerns">
		<h3><span class="secno">4.1 </span>SMS specific concerns</h3>
		<p>
			Note that there are size limitations for SMSs sent on a network (the actual maximum size depends on language encoding the content). When an SMS exceeds the maximum size the device may divide the SMS into several parts. This means that one SMS object may lead to sending several ones to the network (if the platform supports multi-part SMSs).
		</p>
		</div>
	</div>

	<div class="section" id="api-description">
    	<!--OddPage--><h2><span class="secno">5. </span>API Description</h2>
      	<div class="section" id="devicemessaging">
			<h3><span class="secno">5.1 </span> <a class="idlType" href="#idl-def-DeviceMessaging"><code>DeviceMessaging</code></a> </h3>
			<p>
				The <a href="#devicemessaging">DeviceMessaging</a> object is exposed on the <code>navigator.device</code> object, as defined in [<cite><a href="#bib-CORE-DEVICE" rel="biblioentry" class="bibref">CORE-DEVICE</a></cite>].
			</p>


			<pre class="idl"><span class="idlImplements"><a>Device</a> implements <a class="idlType" href="#idl-def-DeviceMessaging"><code>DeviceMessaging</code></a>;</span></pre><div class="idlImplementsDesc"><p>All instances of the <code><a>Device</a></code> type are defined to also implement the <a class="idlType" href="#idl-def-DeviceMessaging"><code>DeviceMessaging</code></a> interface.</p></div>

				<pre class="idl"><span class="idlInterface" id="idl-def-DeviceMessaging">[<span class="extAttr">NoInterfaceObject</span>]
interface <span class="idlInterfaceID">DeviceMessaging</span> {
<span class="idlMethod">    <span class="idlMethType"><a>void</a></span> <span class="idlMethName"><a href="#widl-DeviceMessaging-sendMessage">sendMessage</a></span> (<span class="idlParam">in <span class="idlParamType"><a>DOMString</a></span> <span class="idlParamName">to</span></span>, <span class="idlParam">in <span class="idlParamType">sequence&lt;<a>Blob</a>&gt;?</span> <span class="idlParamName">attachments</span></span>, <span class="idlParam">in <span class="idlParamType"><a>messagingErrorCB</a>?</span> <span class="idlParamName">errorCB</span></span>);</span>
};</span>
</pre><div class="section" id="methods"><h4><span class="secno">5.1.1 </span>Methods</h4><dl class="methods"><dt id="widl-DeviceMessaging-sendMessage"><code>sendMessage</code></dt><dd>
					Sends a message with attachments to the specified address.

					<table class="parameters"><tr><th>Parameter</th><th>Type</th><th>Nullable</th><th>Optional</th><th>Description</th></tr><tr><td class="prmName">to</td><td class="prmType"><code><a>DOMString</a></code></td><td class="prmNullFalse">✘</td><td class="prmOptFalse">✘</td><td class="prmDesc">
								a URI that specificies the address to which the message is to be sent; that URI may contain query string parameters that specify additional headers and the body of the said message
							</td></tr><tr><td class="prmName">attachments</td><td class="prmType"><code>sequence&lt;<a>Blob</a>&gt;</code></td><td class="prmNullTrue">✔</td><td class="prmOptFalse">✘</td><td class="prmDesc">A list of Blob objects that represent attachments to be sent with the message; only applicable to protocols that support the notion of attachments. Using this parameter on protocols that don't support attachments triggers an error.</td></tr><tr><td class="prmName">errorCB</td><td class="prmType"><code><a>messagingErrorCB</a></code></td><td class="prmNullTrue">✔</td><td class="prmOptFalse">✘</td><td class="prmDesc">A callback function called when there was an error with sending the message.</td></tr></table><div><em>No exceptions.</em></div><div><em>Return type: </em><code><a>void</a></code></div></dd></dl></div>


		</div>


                    <div class="section" id="messagingerrorcb">
			<h3><span class="secno">5.2 </span><a class="idlType" href="#idl-def-MessagingErrorCB"><code>MessagingErrorCB</code></a></h3>
			<p>

			</p>
			<pre class="idl"><span class="idlInterface" id="idl-def-MessagingErrorCB">[<span class="extAttr">Callback=FunctionOnly, NoInterfaceObject</span>]
interface <span class="idlInterfaceID">MessagingErrorCB</span> {
<span class="idlMethod">    <span class="idlMethType"><a>void</a></span> <span class="idlMethName"><a href="#widl-MessagingErrorCB-onError">onError</a></span> (<span class="idlParam">in <span class="idlParamType"><a class="idlType" href="#idl-def-MessagingError"><code>MessagingError</code></a></span> <span class="idlParamName">error</span></span>);</span>
};</span>
</pre><div class="section" id="methods-1"><h4><span class="secno">5.2.1 </span>Methods</h4><dl class="methods"><dt id="widl-MessagingErrorCB-onError"><code>onError</code></dt><dd>
					This interface defines the method invoked on failed messaging asynchronous calls defined in this API.
				<table class="parameters"><tr><th>Parameter</th><th>Type</th><th>Nullable</th><th>Optional</th><th>Description</th></tr><tr><td class="prmName">error</td><td class="prmType"><code><a class="idlType" href="#idl-def-MessagingError"><code>MessagingError</code></a></code></td><td class="prmNullFalse">✘</td><td class="prmOptFalse">✘</td><td class="prmDesc"></td></tr></table><div><em>No exceptions.</em></div><div><em>Return type: </em><code><a>void</a></code></div></dd></dl></div>

			</div>


                 <div class="section" id="messagingerror">
                       <h3><span class="secno">5.3 </span><a class="idlType" href="#idl-def-MessagingError"><code>MessagingError</code></a></h3>
				<p class="note">
					Adds Messaging API specific error codes.
				</p>
                <p>
                   The <code>MessagingError</code> interface encapsulates all errors in the manipulation of <code>Messaging</code> objects in the messaging API.
                </p>
                <pre class="idl"><span class="idlInterface" id="idl-def-MessagingError">[<span class="extAttr">NoInterfaceObject</span>]
interface <span class="idlInterfaceID">MessagingError</span> : <span class="idlSuperclass"><a>GenericError</a></span> {
<span class="idlConst">    const <span class="idlConstType"><a>unsigned short</a></span> <span class="idlConstName"><a href="#widl-MessagingError-UNKNOWN_ERROR">UNKNOWN_ERROR</a></span> = <span class="idlConstValue">0</span>;</span>
<span class="idlConst">    const <span class="idlConstType"><a>unsigned short</a></span> <span class="idlConstName"><a href="#widl-MessagingError-INVALID_ARGUMENT_ERROR">INVALID_ARGUMENT_ERROR</a></span> = <span class="idlConstValue">1</span>;</span>
<span class="idlConst">    const <span class="idlConstType"><a>unsigned short</a></span> <span class="idlConstName"><a href="#widl-MessagingError-TIMEOUT_ERROR">TIMEOUT_ERROR</a></span> = <span class="idlConstValue">3</span>;</span>
<span class="idlConst">    const <span class="idlConstType"><a>unsigned short</a></span> <span class="idlConstName"><a href="#widl-MessagingError-PENDING_OPERATION_ERROR">PENDING_OPERATION_ERROR</a></span> = <span class="idlConstValue">4</span>;</span>
<span class="idlConst">    const <span class="idlConstType"><a>unsigned short</a></span> <span class="idlConstName"><a href="#widl-MessagingError-IO_ERROR">IO_ERROR</a></span> = <span class="idlConstValue">5</span>;</span>
<span class="idlConst">    const <span class="idlConstType"><a>unsigned short</a></span> <span class="idlConstName"><a href="#widl-MessagingError-NOT_SUPPORTED_ERROR">NOT_SUPPORTED_ERROR</a></span> = <span class="idlConstValue">6</span>;</span>
<span class="idlConst">    const <span class="idlConstType"><a>unsigned short</a></span> <span class="idlConstName"><a href="#widl-MessagingError-PERMISSION_DENIED_ERROR">PERMISSION_DENIED_ERROR</a></span> = <span class="idlConstValue">20</span>;</span>
<span class="idlConst">    const <span class="idlConstType"><a>unsigned short</a></span> <span class="idlConstName"><a href="#widl-MessagingError-MESSAGE_SIZE_EXCEEDED">MESSAGE_SIZE_EXCEEDED</a></span> = <span class="idlConstValue">30</span>;</span>
<span class="idlAttribute">    readonly attribute <span class="idlAttrType"><a>unsigned short</a></span> <span class="idlAttrName"><a href="#widl-MessagingError-code">code</a></span>;</span>
};</span>
</pre><div class="section" id="attributes"><h4><span class="secno">5.3.1 </span>Attributes</h4><dl class="attributes"><dt id="widl-MessagingError-code"><code>code</code> of type <span class="idlAttrType"><a>unsigned short</a></span>, readonly</dt><dd>
                                                    An error code assigned by an implementation when an error has occurred in Messaging API processing.
                                                <div><em>No exceptions.</em></div></dd></dl></div><div class="section" id="constants"><h4><span class="secno">5.3.2 </span>Constants</h4><dl class="constants"><dt id="widl-MessagingError-INVALID_ARGUMENT_ERROR"><code>INVALID_ARGUMENT_ERROR</code> of type <span class="idlConstType"><a>unsigned short</a></span></dt><dd>
                                                    An invalid parameter was provided when the requested method was invoked.
                                                </dd><dt id="widl-MessagingError-IO_ERROR"><code>IO_ERROR</code> of type <span class="idlConstType"><a>unsigned short</a></span></dt><dd>
                                                    An error occurred in communication with the underlying implementation that meant the requested method could not complete.
                                                </dd><dt id="widl-MessagingError-MESSAGE_SIZE_EXCEEDED"><code>MESSAGE_SIZE_EXCEEDED</code> of type <span class="idlConstType"><a>unsigned short</a></span></dt><dd>
                                                    The message that has been tried to be sent exceeds the maximum supported size for that message type.
                                                </dd><dt id="widl-MessagingError-NOT_SUPPORTED_ERROR"><code>NOT_SUPPORTED_ERROR</code> of type <span class="idlConstType"><a>unsigned short</a></span></dt><dd>
                                                    The requested method is not supported by the current implementation.
                                                </dd><dt id="widl-MessagingError-PENDING_OPERATION_ERROR"><code>PENDING_OPERATION_ERROR</code> of type <span class="idlConstType"><a>unsigned short</a></span></dt><dd>
                                                    If the <a>user agent</a> is currently waiting for a callback on an asynchronous messaging operation, as defined in this specification.
                                                </dd><dt id="widl-MessagingError-PERMISSION_DENIED_ERROR"><code>PERMISSION_DENIED_ERROR</code> of type <span class="idlConstType"><a>unsigned short</a></span></dt><dd>
                                                    Access to the requested method was denied at the implementation or by the user.
                                                </dd><dt id="widl-MessagingError-TIMEOUT_ERROR"><code>TIMEOUT_ERROR</code> of type <span class="idlConstType"><a>unsigned short</a></span></dt><dd>
                                                    The requested method timed out before it could be completed.
                                                </dd><dt id="widl-MessagingError-UNKNOWN_ERROR"><code>UNKNOWN_ERROR</code> of type <span class="idlConstType"><a>unsigned short</a></span></dt><dd>
                                                    An unknown error occurred.
                                                </dd></dl></div>
             </div>


    </div>


    <div id="acknowledgements" class="appendix section">
      <!--OddPage--><h2><span class="secno">A. </span>Acknowledgements</h2>
      <p>
        ...
      </p>
    </div>


<div class="appendix section" id="references"><!--OddPage--><h2><span class="secno">B. </span>References</h2><div class="section" id="normative-references"><h3><span class="secno">B.1 </span>Normative references</h3><dl class="bibliography"><dt id="bib-CORE-DEVICE">[CORE-DEVICE]</dt><dd>Robin Berjon. <a href="http://dev.w3.org/2009/dap/device/"><cite>Core Device Interfaces.</cite></a> 02 December 2009. W3C Editor's Draft. (Work in progress.) URL: <a href="http://dev.w3.org/2009/dap/device/">http://dev.w3.org/2009/dap/device/</a>
</dd><dt id="bib-RFC2119">[RFC2119]</dt><dd>S. Bradner. <a href="http://www.ietf.org/rfc/rfc2119.txt"><cite>Key words for use in RFCs to Indicate Requirement Levels.</cite></a> March 1997. Internet RFC 2119.  URL: <a href="http://www.ietf.org/rfc/rfc2119.txt">http://www.ietf.org/rfc/rfc2119.txt</a>
</dd><dt id="bib-WEBIDL">[WEBIDL]</dt><dd>Cameron McCormack. <a href="http://www.w3.org/TR/2008/WD-WebIDL-20081219"><cite>Web IDL.</cite></a> 19 December 2008. W3C Working Draft. (Work in progress.) URL: <a href="http://www.w3.org/TR/2008/WD-WebIDL-20081219">http://www.w3.org/TR/2008/WD-WebIDL-20081219</a>
</dd></dl></div><div class="section" id="informative-references"><h3><span class="secno">B.2 </span>Informative references</h3><p>No informative references.</p></div></div></body></html>