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<h1><a name="title" id="title"></a>Compound Document by Reference Framework 1.0</h1>
<h2><a name="w3c-doctype" id="w3c-doctype"></a>W3C Working Group Note 19 August 2010</h2><dl><dt>This version:</dt><dd>
      <a href="http://www.w3.org/TR/2010/NOTE-CDR-20100819">http://www.w3.org/TR/2010/NOTE-CDR-20100819</a>
    </dd><dt>Latest version:</dt><dd>
      <a href="http://www.w3.org/TR/CDR/">http://www.w3.org/TR/CDR/</a>
    </dd><dt>Previous version:</dt><dd>
      <a href="http://www.w3.org/TR/2007/CR-CDR-20070718">http://www.w3.org/TR/2007/CR-CDR-20070718</a>
    </dd><dt>Editors:</dt><dd>Timur Mehrvarz, Vodafone Group Services Limited</dd><dd>Lasse Pajunen, Nokia</dd><dd>Julien Quint, DAISY Consortium</dd><dd>Daniel Appelquist, Vodafone Group Services Limited</dd></dl><p class="copyright"><a href="http://www.w3.org/Consortium/Legal/ipr-notice#Copyright">Copyright</a> © 2007 <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.org/"><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></div><hr /><div>
<h2><a name="abstract" id="abstract"></a>Abstract</h2><p>
        This document specifies the <em>Compound Document by Reference Framework 1.0</em>.
		  </p><p>
        When combining separate markup languages, specific problems have to 
        be resolved that are not addressed by their individual language 
        specifications, such as the propagation of events across namespaces, 
        the combination of rendering or the user interaction model.
		  </p><p>
        <em>Compound Document</em> is the W3C term for a document that combines 
        multiple formats.
		  </p></div>


      <div>
        <h2><a name="status" id="status"></a>Status of this Document</h2>
          <p class="discontinued">This document has been <strong>discontinued</strong> as part of the closure of the <a href="http://www.w3.org/2004/CDF/">Compound Document Formats Working Group</a>.</p>
      </div>


<div class="toc">
<h2><a name="contents" id="contents"></a>Table of Contents</h2><p class="toc">1 <a href="#cd-framework">Introduction to Compound Documents</a><br />
    1.1 <a href="#scope">Scope</a><br />
    1.2 <a href="#related-documents">Related Documents</a><br />
    1.3 <a href="#cd-reference-vs-inclusion">Reference and Inclusion</a><br />
    1.4 <a href="#referencing-child-objects">Referencing Child Objects</a><br />
    1.5 <a href="#identification">Identification and Versioning</a><br />
2 <a href="#cdr-framework">Compound Document by Reference (CDR)</a><br />
    2.1 <a href="#dom">Document Object Model</a><br />
    2.2 <a href="#events">Events</a><br />
    2.3 <a href="#extss">External Style Sheets</a><br />
</p>
<h3><a name="appendices" id="appendices"></a>Appendices</h3><p class="toc">A <a href="#definitions">Definitions</a><br />
B <a href="#conformance">Conformance</a><br />
C <a href="#references">References</a><br />
    C.1 <a href="#refsNormative">Normative</a><br />
    C.2 <a href="#refsInformative">Informative</a><br />
D <a href="#acknowledgements">Acknowledgements</a> (Non-Normative)<br />
E <a href="#changes-log">Changes Log</a> (Non-Normative)<br />
</p></div><hr /><div class="body"><div class="div1">
<h2><a name="cd-framework" id="cd-framework"></a>1 Introduction to Compound Documents</h2><div class="div2">
<h3><a name="scope" id="scope"></a>1.1 Scope</h3><p>(This section is informative)</p><p>
          Combining content delivery formats can often be desirable in order to 
          provide a seamless experience for the user. 
        </p><p>
          For example, XHTML-formatted content can be augmented by SVG objects, 
          to create a more dynamic, interactive and self adjusting presentation.

          A set of standard rules is required in order to provide this 
          capability across a range of user agents and devices.
        </p><p>
          These are examples of possible Compound Document profiles:
        </p><ul><li><p>XHTML + SVG + MathML</p></li><li><p>XHTML + SMIL</p></li><li><p>XHTML + XForms</p></li><li><p>XHTML + VoiceML</p></li></ul><p>
          This document defines a generic <em>Compound Document by Reference Framework</em> (CDRF)
          that defines a language-independent processing model for combining arbitrary 
          document formats.
        </p><p>
          NOTE: The Compound Document Framework is language-independent. 
          While it is clearly meant to serve as the basis for integrating 
          W3C's family of XML formats within its Interaction Domain (e.g., 
          CSS, MathML, SMIL, SVG, VoiceXML, XForms, XHTML, XSL) with each 
          other, it can also be used to integrate non-W3C formats with W3C 
          formats or integrate non-W3C formats with other non-W3C formats.
        </p></div><div class="div2">
<h3><a name="related-documents" id="related-documents"></a>1.2 Related Documents</h3><p>(This section is informative)</p><dl><dt class="label">WICD Core</dt><dd><p>
              <em>WICD Core</em> <a href="#WICD">[WICDCORE]</a>
              is the foundation of rich multimedia content and
              describes rules for combining Hypertext Markup Language (XHTML) and 
              scalable child objects, such as Scalable Vector Graphics (SVG) 
              in a non device specific manner.  WICD stands for <em>Web Integrated 
              Compound Document</em>.
              </p><p>
              <em>WICD Core</em> builds upon <em>CDRF</em>.
            </p></dd></dl></div><div class="div2">
<h3><a name="cd-reference-vs-inclusion" id="cd-reference-vs-inclusion"></a>1.3 Reference and Inclusion</h3><p>(This section is informative)</p><p>
          A namespace uniquely identifies a set of names so that there is no 
          ambiguity when objects having different origins but the same names 
          are mixed together.  An XML namespace is a collection of element 
          type and attribute names.  These element types and attribute names 
          are uniquely identified by the name of the unique XML namespace of 
          which they are a part.  In an XML document, any element type or 
          attribute name can thus have a two-part name consisting of the 
          namespace name and the element or attribute name.
        </p><p>
          A Compound Document by inclusion combines XML markup from several 
          namespaces into a single physical document.  A number of standards 
          exist, and continue to be developed, that are descriptions of XML 
          markup within a single namespace.  XHTML, XForms, VoiceXML, and 
          MathML are some of the prominent examples of such standards, each 
          having its own namespace.  Each of these specifications focuses on 
          one aspect of rich-content development.  For example, XForms 
          focuses on data collection and submission, VoiceXML on speech, and 
          MathML on the display of mathematical notations.
        </p><p>
          To authors of content, each of these many standards is useful and 
          important.  However, it is the combination of elements of any number 
          of these standards that lends true flexibility and power to rich 
          document creation.  A document may exist to be displayed within a 
          web browser, to display an input form, with a scalable graphic and 
          a bit of mathematical notation, all on the same page.  XHTML, XForms, 
          SVG, and MathML, respectively, serve these needs, and could therefore 
          be combined into a single multi-namespace document.
        </p><p>
          Consider this simple example, a Compound Document combining XHTML and 
          MathML. The namespace declarations are marked by an appended comment 
          to match the numbered namespaces listed below in the XML source in 
          Example 1.
        </p><ol class="enumar"><li><p>
            XHTML Namespace declaration. The namespace for XHTML 1.0 is 
            declared. Each XHTML element in the example below is qualified with 
            the xhtml: namespace prefix.</p></li><li><p>
            MathML Namespace declaration. The namespace for MathML 2.0 is 
            declared. Each MathML element in the example below is qualified with 
            the mathml: prefix.</p></li></ol><p>A Compound Document example:</p><div class="exampleInner"><pre>&lt;?xml version="1.0" encoding="iso-8859-1"?&gt;
&lt;xhtml:html xmlns:xhtml="http://www.w3.org/1999/xhtml"&gt;   &lt;!-- 1 --&gt;
  &lt;xhtml:body&gt;
    &lt;xhtml:h1&gt;A Compound Document&lt;/xhtml:h1&gt;
    &lt;xhtml:p&gt;A simple formula using MathML in XHTML.&lt;/xhtml:p&gt;
    &lt;mathml:math xmlns:mathml="http://www.w3.org/1998/Math/MathML"&gt;   &lt;!-- 2 --&gt;
      &lt;mathml:mrow&gt;
        &lt;mathml:msqrt&gt;
          &lt;mathml:mn&gt;49&lt;/mathml:mn&gt;
        &lt;/mathml:msqrt&gt;
        &lt;mathml:mo&gt;=&lt;/mathml:mo&gt;
        &lt;mathml:mn&gt;7&lt;/mathml:mn&gt;
      &lt;/mathml:mrow&gt;
    &lt;/mathml:math&gt;
  &lt;/xhtml:body&gt;
&lt;/xhtml:html&gt;
          </pre></div><p>
          Example 1: A Simple Compound Document
        </p><img src="cd-mmp-cd1.png" alt="A Compound Document" /><p>
          Figure 1 (above): Rendered Simple Compound Document - This is a rendered version 
          of the simple Compound Document in Example 1 which combines XHTML and 
          MathML for rich content.
        </p><p>
          Compound Documents may be composed of a single document that contains 
          multiple namespaces, as seen in Example 1.  This is a Compound Document 
          “by Inclusion” (CDI).  However, a Compound Document may also be composed 
          over several documents in which one document of a particular namespace 
          references another separate document of a different namespace.
        </p><p>
          For example, a root or top-most document might contain XHTML content for 
          defining and formatting a page.  This parent XHTML document can reference 
          another document, of another namespace, through the use of the XHTML 
          &lt;object&gt; tag.  This can be repeated for as many documents as necessary.
          The root document plus this collection of separate, referenced documents 
          is considered a Compound Document “by Reference” (CDR).  See Figure 2 for 
          a simple CDR document in which an XHTML root document contains a reference 
          to a separate SVG child document having markup for three colored circles.
        </p><img src="cd-circles.png" alt="An XHTML document referencing an SVG document with 3 overlapping colored circles" /><p>
          Figure 2 (above): Compound Document by Reference - A simple Compound Document by 
          reference where a XHTML document references a separate SVG document.
          Below you see the two markup fragments.
        </p><p>
          XHTML:
        </p><div class="exampleInner"><pre>&lt;?xml version="1.0"?&gt;
&lt;html xmlns="http://www.w3.org/1999/xhtml"&gt;
  &lt;head&gt;
    &lt;title&gt;circles&lt;/title&gt;
  &lt;/head&gt;
  &lt;body&gt;
    &lt;object height="350" width="600" type="image/svg+xml" data="circles.svg"/&gt;
  &lt;/body&gt;
&lt;/html&gt;
</pre></div><p>
          SVG:
        </p><div class="exampleInner"><pre>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
&lt;svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" baseProfile="tiny" version="1.2"&gt;
  &lt;g fill-opacity="0.7" stroke="black" stroke-width="0.2cm"&gt;
    &lt;circle fill="red" cx="6cm" cy="2cm" transform="translate(0,50)" r="100"/&gt;
    &lt;circle fill="blue" cx="6cm" cy="2cm" transform="translate(70,150)" r="100"/&gt;
    &lt;circle fill="green" cx="6cm" cy="2cm" transform="translate(-70,150)" r="100"/&gt;
  &lt;/g&gt;
&lt;/svg&gt;
</pre></div><p>
          And of course, a Compound Document may be a hybrid of both compound 
          document by inclusion and Compound Document by reference.  
        </p></div><div class="div2">
<h3><a name="referencing-child-objects" id="referencing-child-objects"></a>1.4 Referencing Child Objects</h3><p>(This section is informative)</p><p>
            Each hosting language has its own methods for referencing child objects. 
            These provide different functionality, but the following section 
            describes (some of) the common functionality.
          </p><div class="div3">
<h4><a name="xhtml-object-element" id="xhtml-object-element"></a>1.4.1 Referencing Elements</h4><p>
              In Compound Document by Reference Framework 1.0, embedding media and other objects is done by using the
              existing elements in the host languages rather than by extending them
              with new markup. For example, in XHTML documents, the &lt;object&gt; element will be used
              to reference XML document types. Similarly, in SVG documents, the &lt;foreignObject&gt;
              element is used, and in SMIL, the &lt;ref&gt; element should be used.
            </p></div><div class="div3">
<h4><a name="xhtml-child-object-parameters" id="xhtml-child-object-parameters"></a>1.4.2 Declarative Child Object Parameters</h4><p>
              It may be necessary to transfer parameters declaratively to a 
              referenced child object. Compound Document profiles may define 
              specific parameters/values for this purpose. Three examples:
            </p><div class="exampleInner"><pre>&lt;object type="..." data="..."&gt;
  &lt;param name="param1" value="true" /&gt;
  &lt;param name="param2" value="123" /&gt;
&lt;/object&gt;
</pre></div><p>This SVG example uses the &lt;foreignObject&gt; element:</p><div class="exampleInner"><pre>&lt;svg xmlns="http://www.w3.org/2000/svg"&gt;
    &lt;foreignObject&gt;
        &lt;metadata&gt;
           param=value;
           param=value
        &lt;/metadata&gt;
    &lt;/foreignObject&gt;
&lt;/svg&gt;
</pre></div><p>This SMIL example uses the &lt;ref&gt; element:</p><div class="exampleInner"><pre>&lt;ref src="http://www.example.com/herbert.face"&gt;
  &lt;param name="mood" value="surly" valuetype="data"/&gt;
  &lt;param name="accessories" value="baseball-cap,nose-ring" valuetype="data"/&gt;
&lt;/ref&gt;</pre></div></div></div><div class="div2">
<h3><a name="identification" id="identification"></a>1.5 Identification and Versioning</h3><p><em>(This section is informative)</em></p><p>
          A distinct identification of the supported Compound Document 
          capabilities 
          is often not possible by advertising a list of supported 
          content types. 
          Such a list is not sufficient to describe the supported 
          capabilities between compound languages.  
          A unique profile identifier is 
          often better suited to describe such characteristics.
          CDRF profiles may define their identification and versioning criteria, 
          which should utilize the mechanisms readily available from the root 
          language.  For example, if the root language is XHTML, then the content 
          type of "application/xhtml+xml" can be used.   It can then be used with 
          the optional parameter of "profile", with a value of a URI that both 
          identifies the profile and its version.
        </p></div></div><div class="div1">
<h2><a name="cdr-framework" id="cdr-framework"></a>2 Compound Document by Reference (CDR)</h2><div class="div2">
<h3><a name="dom" id="dom"></a>2.1 Document Object Model</h3><div class="cdf-assert">
            <p>Compound document profiles which leverage the Compound Document  
            Framework and which support scripting must have scripting interfaces  
            that are compatible with the uDOM, or implement a superset such as the 
            DOM Level 3 Core Specification <a href="#DOM-Level-3-Core">[DOM3CORE]</a>.</p>
          </div><p>
            Compound Document profiles may subset DOM Level 3 Core <a href="#DOM-Level-3-Core">[DOM3CORE]</a>, but any 
            DOM Core subsetting should be coordinated with other related DOM 
            subsetting standards efforts. For example, mobile subset efforts 
            for W3C languages such as XHTML, SVG, SMIL and XForms should be 
            coordinated with each other because of the high probability that 
            Compound Document profiles will be defined that combine these 
            languages.
          </p><p>
            A Compound Document using references consists of a root 
            document which may have one or more child documents, which may in turn 
            have its own child documents. Each child document contains elements 
            and attributes from one or more namespaces. The consequence of this is that each
            child document generates its own DOM. The interaction points
            between parent and child documents of a Compound Document
            are at referencing DOM nodes in a parent document. The Compound Document
            framework provides a means of accessing the DOMs of the child and parent documents.
          </p><p>
            Each child document DOM generates its own scripting execution context.
            Each child DOM scripting execution context provides access to its
            corresponding global object.
            The CSS <a href="#CSS21">[CSS21]</a> style-sheet cascade is applied to each DOM in isolation. CSS
            property inheritance is inhibited at document boundaries.
            It is possible for a content author to use child-to-parent (see <a href="#child-to-parent-dom-access"><b>2.1.2 Child to Parent DOM Access</b></a>) or parent-to-child (see <a href="#parent-to-child-dom-access"><b>2.1.3 Parent to Child DOM Access</b></a>) to propagate specific styling properties.
          </p><div class="div3">
<h4><a name="specialized-dom-access" id="specialized-dom-access"></a>2.1.1 Specialized DOM access</h4><p>
              Many languages define specialized DOM APIs. The W3C has defined 
              an HTML DOM which extends the Core DOM and provides various 
              convenience APIs for interacting with HTML documents. Similarly, 
              the SVG language defines an SVG DOM which extends Core DOM.
            </p><p>
              Compound Document profiles must specify whether the specialized 
              DOM APIs that are defined within the component languages are 
              supported.
            </p><p>
              Note: Although not required for compliance with the Compound 
              Document Framework, it is strongly recommended that compound 
              document profiles support all specialized DOM APIs that are 
              supported in the component languages.
            </p></div><div class="div3">
<h4><a name="child-to-parent-dom-access" id="child-to-parent-dom-access"></a>2.1.2 Child to Parent DOM Access</h4><div class="cdf-assert"><p>User agents must allow
              the child DOM to access the parent DOM.</p>
            </div><p>
              For a child document to access the parent document, this 
              specification relies on the Window Object's <code>frameElement</code>
              attribute <a href="#WINDOW">[WINDOW]</a>. 
              The <code>frameElement</code> attribute can be accessed from the <code>document</code> attribute 
              <a href="#DOM-Level-2-Views">[DOM2VIEWS]</a> using the <code>defaultView</code> attribute 
              <a href="#DOM-Level-2-Views">[DOM2VIEWS]</a>.  Profiles built upon 
              this specification must specify on which exact document objects 
              these interfaces must be implemented.
            </p><p>
              Example usage of <code>defaultView.frameElement</code> in <code>child.svg</code>
            </p><div class="exampleInner"><pre>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
&lt;svg xmlns="http://www.w3.org/2000/svg"
  height="20" version="1.1" width="20"&gt;
	&lt;title&gt;child-svg&lt;/title&gt;
	&lt;rect fill="blue" height="20"
		onload="alert('Child has seen: ' + 
          document.defaultView.frameElement.ownerDocument.title)"
		width="20" x="10" y="10" /&gt;
&lt;/svg&gt;
</pre></div></div><div class="div3">
<h4><a name="parent-to-child-dom-access" id="parent-to-child-dom-access"></a>2.1.3 Parent to Child DOM Access</h4><div class="cdf-assert"><p>User agents must allow
              the parent DOM to access any child DOM. The <code>contentDocument</code> 
              attribute must represent the child document. </p>
            </div><p>
              DOM Level 2 HTML defines a way for several elements to access the 
              child document using the <code>contentDocument</code> attribute 
              <a href="#DOM-Level-2-HTML">[DOM2HTML]</a>.
              The <code>contentDocument</code> only applies to objects implementing 
              the <code>Element</code> interface defined in DOM Level 3 Core. 
              <a href="#DOM-Level-3-Core">[DOM3CORE]</a>.  Profiles built upon 
              this specification must specify on which 
              exact element objects the interface must be implemented.
            </p><p>
              Example usage of <code>contentDocument</code> in <code>parent.xhtml</code>:
            </p><div class="exampleInner"><pre>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
&lt;html xmlns="http://www.w3.org/1999/xhtml"&gt; 
  &lt;head&gt; 
    &lt;title&gt;parent-xhtml&lt;/title&gt;
  &lt;/head&gt; 
  &lt;body&gt; 
    &lt;object data="child.svg" 
      onload="alert('Parent has seen: ' + 
        this.contentDocument.getElementsByTagNameNS(
          'http://www.w3.org/2000/svg',
          'title') [0].textContent)"  /&gt;
  &lt;/body&gt;
&lt;/html&gt;
</pre></div></div></div><div class="div2">
<h3><a name="events" id="events"></a>2.2 Events</h3><div class="cdf-assert"><p>
            Compound Document profiles which leverage the Compound Document 
            Framework and which support events and interactivity must have 
            event interfaces and an event processing model that are compatible 
            with the DOM Level 3 Events Specification <a href="#DOM-Level-3-Events">[DOM3EVENTS]</a>.
          </p></div><p>
            Compound Document profiles may subset DOM Level 3 Events <a href="#DOM-Level-3-Events">[DOM3EVENTS]</a>, but any 
            DOM Events subsetting should be coordinated with other related DOM 
            subsetting standards efforts. For example, mobile subset efforts 
            for W3C languages such as XHTML, SVG, SMIL and XForms should be 
            coordinated with each other because of the high probability that 
            Compound Document profiles will be defined that combine these 
            languages.
          </p><div class="div3">
<h4><a name="event-propagation" id="event-propagation"></a>2.2.1 Event Propagation</h4><p>
              Using the various methods and attributes described in the Window API 
              <a href="#WINDOW">[WINDOW]</a>,  
              in DOM Level 3 Events <a href="#DOM-Level-3-Events">[DOM3EVENTS]</a>
              and DOM Level 3 Core <a href="#DOM-Level-3-Core">[DOM3CORE]</a> 
              it is possible for web authors to attach an  
              event listener to a child document; and then upon catching it,  
              dispatch it to the parent document on the referencing element. The  
              following piece of script would create an event and dispatch it upon  
              the referencing element:
            </p><div class="exampleInner"><pre>var x = document.createEvent("CustomEvent");
x.initCustomEventNS("http://example.org/test", "test", true, false, null);
window.frameElement.dispatchEvent(x);
</pre></div></div><div class="div3">
<h4><a name="event-related-markup" id="event-related-markup"></a>2.2.2 Event-Related Markup</h4><p>
              In order to claim conformance to this Compound Documents 
              Framework, a Compound Document profile must define how all 
              of its event-related language constructs and scripting 
              constructs map to corresponding DOM Level 3 Event facilities <a href="#DOM-Level-3-Events">[DOM3EVENTS]</a>,
              unless DOM Level 3 Events has already defined the mapping.
              In particular:
            </p><div class="cdf-assert">
              <p>For each event construct within supported languages, 
              the profile must define the event's namespace and local name, 
              whether it supports the bubble phase,
              and whether it is cancellable, 
              as well as the name of the DOM interface for its event structure 
              (e.g., events.dom.w3c.org::UIEvent).</p>
            </div><div class="cdf-assert">
              <p>Any events that are defined to be equivalent to a 
              corresponding event from DOM Level 3 Events <a href="#DOM-Level-3-Events">[DOM3EVENTS]</a> must have compatible 
              behavior, such as the phases supported, cancellability 
              and propagation across parent/child Compound Document 
              boundaries. For example, for a "click" event from 
              language A to be equivalent to the DOM3 "click" event, 
              it also must be cancellable since DOM3 "click" is cancellable.</p>
            </div><div class="cdf-assert">
              <p>The profile must define how to map language features for 
              event listeners, event handlers, and event targets into 
              corresponding DOM Level 3 Events facilities <a href="#DOM-Level-3-Events">[DOM3EVENTS]</a>.
            </p></div></div></div><div class="div2">
<h3><a name="extss" id="extss"></a>2.3 External Style Sheets</h3><div class="cdf-assert">
        <p>For formats which use xml, the processing instruction 
        'Associating Style Sheets with XML documents' 
        <a href="#Associating-Stylesheets">[XMLSS]</a> must be supported,
        for all supported style sheet languages.</p>
        </div></div></div></div><div class="back"><div class="div1">
<h2><a name="definitions" id="definitions"></a>A Definitions</h2><p>The following terms and definitions are used within this document.</p><dl><dt class="label">Child Document</dt><dd><p>In the case of combining by reference, one compound
          document may be a collection of several separate
          documents.</p><p>The document that is referenced is called a child document. 
          If a child document itself references other documents, then it 
          is also a parent document.</p></dd><dt class="label">Compound Document</dt><dd><p>
            A Compound Document is a
            document that combines mutliple document formats either
            by reference, by inclusion or both.</p></dd><dt class="label">Compound Document by Inclusion (CDI)</dt><dd><p>
              A document which directly includes other documents and or namespace markup within the same physical document.
            </p><p>
              For example: A single XML document making use of XML grammars defined
              independently, normally making use of multiple namespaces.
            </p></dd><dt class="label">Compound Document by Reference (CDR)</dt><dd><p>
              A document which logically includes other documents via a hypertext
              reference.
            </p></dd><dt class="label">Focus traversal</dt><dd><p>
              Focus traversal defines the elements that get focus and the order, in which they are traversed.
            </p></dd><dt class="label">Parent Document</dt><dd><p>In the case of combining by reference, one compound
              document may be a collection of several separate
              documents.</p><p>A <em>parent document</em> represents a document that
              has a DOM as defined by DOM Level 3 Core
              and references another document.
              The DOM that is formed must be tree-based.</p></dd><dt class="label">Root Document</dt><dd><p>In the case of combining by reference, one compound
              document may be a collection of several separate
              documents.</p><p>The outermost parent document is called the <em>root document</em>.
            </p></dd><dt class="label">Scalable Child Document</dt><dd><p>
             A Scalable Child Document is a Child Document for which rendering is possible at a range of output sizes.
             Scalable means not being limited to a single, fixed, pixel size.
          </p></dd><dt class="label">Subset profile</dt><dd><p>
              A reduced set of capabilities from the original specification. Meaning, 
              that the subset doesn't add any new features, but only removes them. Content
              that conforms to the profiled subset must be rendered successfully
              by a compliant user agent of the full/superset specification. In other words, the full 
              user agent doesn't need to know it is content from a subset profile.</p></dd><dt class="label">User Agent</dt><dd><p>
            See <a href="http://www.w3.org/TR/di-gloss/#def-user-agent">definition</a> in Device Independence Glossary document.</p></dd></dl></div><div class="div1">
<h2><a name="conformance" id="conformance"></a>B Conformance</h2><p>
        This specification defines conformance for several classes of products:
      </p><ul><li><p>User agents</p></li><li><p>Profiles</p></li></ul><p>
        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 (see ). However, for readability, 
        these words do not appear in all uppercase letters in this 
        specification.
      </p><p>
        At times, this specification recommends good practice for 
        authors and user agents. These recommendations are not 
        normative and conformance with this specification does 
        not depend on their realization. These recommendations 
        contain the expression "We recommend ...", "This 
        specification recommends ...", or some similar wording.
      </p><p>
        User Agent Conformance
      </p><ol class="enumar"><li><p>User agents must allow the child DOM to access the parent DOM.</p></li><li><p>User agents must allow
              the parent DOM to access any child DOM. The contentDocument 
              attribute must represent the child document.</p></li><li><p>A conformant user agent of a superset profile specification must 
             process subset profile content as if it were the superset profile content.</p></li></ol><p>
        Profile Conformance
      </p><ol class="enumar"><li><p>
            Compound Document profiles which support scripting must have scripting 
            interfaces that are compatible with the DOM Level 3 Core 
            Specification.
          </p></li><li><p>
            Compound Document profiles which support events and interactivity must have 
            event interfaces and an event processing model that are compatible 
            with the DOM Level 3 Events Specification.
          </p></li><li><p>
            For each event construct within supported languages, 
            the profile must define the event's namespace and local name, 
            whether it supports the bubble phase,
            and whether it is cancellable, 
            as well as the name of the DOM interface for its event structure 
            (e.g., events.dom.w3c.org::UIEvent).
          </p></li><li><p>
            Any events that are defined to be equivalent to a 
            corresponding event from DOM3 Events must have compatible 
            behavior, such as the phases supported, cancellability 
            and propagation across parent/child Compound Document 
            boundaries. For example, for a "click" event from 
            language A to be equivalent to the DOM3 "click" event, 
            it also must be cancellable since DOM3 "click" is cancellable.
          </p></li><li><p>
            The profile must define how to map language features for 
            event listeners, event handlers, and event targets into 
            corresponding DOM3 Events facilities.
          </p></li><li><p>A conformant subset profile must not add new features from their 
             corresponding superset specification.</p></li><li><p>A conformant profile must define any dependent subset profiles.</p></li></ol></div><div class="div1">
<h2><a name="references" id="references"></a>C References</h2><div class="div2">
<h3><a name="refsNormative" id="refsNormative"></a>C.1 Normative</h3><dl><dt class="label"><a name="CSS21" id="CSS21"></a>[CSS21]</dt><dd>
          <a href="http://www.w3.org/TR/CSS21"><cite>
            Cascading Style Sheets, level 2 revision 1 CSS 2.1
            Specification
          </cite></a>
          , Håkon Wium Lie, Tantek Çelik, Bert Bos, and Ian Hickson,
          Editors. World Wide Web Consortium, 06 Nov 2006. This version is
          http://www.w3.org/TR/2006/WD-CSS21-20061106. The
          <a href="http://www.w3.org/TR/CSS21">latest version</a>
          is available at http://www.w3.org/TR/CSS21.
        </dd><dt class="label"><a name="DOM-Level-2-HTML" id="DOM-Level-2-HTML"></a>[DOM2HTML]</dt><dd>
          <a href="http://www.w3.org/TR/DOM-Level-2-HTML/"><cite>
            Document Object Model (DOM) Level 2 HTML Specification
          </cite></a>
          , Johnny Stenback, Philippe Le Hégaret, and Arnaud Le Hors,
          Editors. World Wide Web Consortium, 09 Jan 2003. This version is
          http://www.w3.org/TR/2003/REC-DOM-Level-2-HTML-20030107. The
          <a href="http://www.w3.org/TR/DOM-Level-2-HTML/">
            latest version
          </a>
          is available at http://www.w3.org/TR/DOM-Level-2-HTML/.
        </dd><dt class="label"><a name="DOM-Level-2-Views" id="DOM-Level-2-Views"></a>[DOM2VIEWS]</dt><dd>
          <a href="http://www.w3.org/TR/DOM-Level-2-Views"><cite>
            Document Object Model (DOM) Level 2 Views Specification
          </cite></a>
          , Laurence Cable and Arnaud Le Hors, Editors. World Wide Web
          Consortium, 13 Nov 2000. This version is
          http://www.w3.org/TR/2000/REC-DOM-Level-2-Views-20001113. The
          <a href="http://www.w3.org/TR/DOM-Level-2-Views">
            latest version
          </a>
          is available at http://www.w3.org/TR/DOM-Level-2-Views.
        </dd><dt class="label"><a name="DOM-Level-3-Core" id="DOM-Level-3-Core"></a>[DOM3CORE]</dt><dd>
          <a href="http://www.w3.org/TR/DOM-Level-3-Core/"><cite>
            Document Object Model (DOM) Level 3 Core Specification
          </cite></a>
          , Jonathan Robie, Steve Byrne, Philippe Le Hégaret,
          <em>et al.</em>
          , Editors. World Wide Web Consortium, 07 Apr 2004. This version
          is http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407. The
          <a href="http://www.w3.org/TR/DOM-Level-3-Core/">
            latest version
          </a>
          is available at http://www.w3.org/TR/DOM-Level-3-Core/.
        </dd><dt class="label"><a name="DOM-Level-3-Events" id="DOM-Level-3-Events"></a>[DOM3EVENTS]</dt><dd>
          <a href="http://www.w3.org/TR/DOM-Level-3-Events/"><cite>
            Document Object Model (DOM) Level 3 Events Specification
          </cite></a>
          , Tom Pixley and Philippe Le Hégaret, Editors. World Wide Web
          Consortium, 13 Apr 2006. This version is
          http://www.w3.org/TR/2006/WD-DOM-Level-3-Events-20060413. The
          <a href="http://www.w3.org/TR/DOM-Level-3-Events/">
            latest version
          </a>
          is available at http://www.w3.org/TR/DOM-Level-3-Events/.
        </dd><dt class="label"><a name="WINDOW" id="WINDOW"></a>[WINDOW]</dt><dd>
          <a href="http://www.w3.org/TR/2006/WD-Window-20060407/"><cite>
            Window Object 1.0
          </cite></a>, Ian Davis and Maciej Stachowiak, Editors.
          World Wide Web Consortium, 07 April 2006. This version is
          http://www.w3.org/TR/2006/WD-Window-20060407/. The
          <a href="http://www.w3.org/TR/Window">latest version</a>
          is available at http://www.w3.org/TR/Window.
        </dd><dt class="label"><a name="Associating-Stylesheets" id="Associating-Stylesheets"></a>[XMLSS]</dt><dd>
      	<a href="http://www.w3.org/TR/xml-stylesheet/"><cite>Associating Style Sheets with XML documents
      	</cite></a>
      	, James Clark,
      	Editor. World Wide Web Consortium, 29 June 1999. This version is
      	http://www.w3.org/1999/06/REC-xml-stylesheet-19990629 . The
      	<a href="http://www.w3.org/TR/xml-stylesheet">latest version</a>
      	is available at http://www.w3.org/TR/xml-stylesheet .
      	</dd></dl></div><div class="div2">
<h3><a name="refsInformative" id="refsInformative"></a>C.2 Informative</h3><dl><dt class="label"><a name="WICD" id="WICD"></a>[WICDCORE]</dt><dd>
          <a href="http://www.w3.org/TR/WICD/"><cite>
            WICD Core 1.0
          </cite></a>
          , Timur Mehrvarz, Daniel Appelquist, Lasse Pajunen, and Julien Quint,
          Editors.
          World Wide Web Consortium, 22 Nov 2006. This version is
          http://www.w3.org/TR/2006/WD-WICD-20061122/. The
          <a href="http://www.w3.org/TR/WICD/">latest version</a>
          is available at http://www.w3.org/TR/WICD/.
        </dd><dt class="label"><a name="MathML2" id="MathML2"></a>[MATHML2]</dt><dd>
          <a href="http://www.w3.org/TR/MathML2/"><cite>
            Mathematical Markup Language (MathML) Version 2.0 (Second
            Edition)
          </cite></a>
          , David Carlisle, Patrick Ion, Robert Miner, and Nico Poppelier,
          Editors. World Wide Web Consortium, 21 Oct 2003. This version is
          http://www.w3.org/TR/2003/REC-MathML2-20031021/. The
          <a href="http://www.w3.org/TR/MathML2/">latest version</a>
          is available at http://www.w3.org/TR/MathML2/.
        </dd><dt class="label"><a name="REC-xml" id="REC-xml"></a>[XML]</dt><dd>
          <a href="http://www.w3.org/TR/xml"><cite>
            Extensible Markup Language (XML) 1.0 (Fourth Edition)
          </cite></a>
          , C. M. Sperberg-McQueen, Eve Maler, Tim Bray,
          <em>et al.</em>
          , Editors. World Wide Web Consortium, 16 August 2006. This version
          is http://www.w3.org/TR/2006/REC-xml-20060816. The
          <a href="http://www.w3.org/TR/xml">latest version</a>
          is available at http://www.w3.org/TR/xml.
        </dd><dt class="label"><a name="REC-xml-names" id="REC-xml-names"></a>[XML-NAMES]</dt><dd>
          <a href="http://www.w3.org/TR/xml-names"><cite>
            Namespaces in XML 1.0 (Second Edition)
          </cite></a>
          , Tim Bray, Dave Hollander, Andrew Layman, and Richard Tobin,
          Editors. World Wide Web Consortium, 16 Aug 2006. This version is
          http://www.w3.org/TR/2006/REC-xml-names-20060816. The
          <a href="http://www.w3.org/TR/xml-names">latest version</a>
          is available at http://www.w3.org/TR/xml-names.
        </dd><dt class="label"><a name="voicexml20" id="voicexml20"></a>[VOICEXML2]</dt><dd>
          <a href="http://www.w3.org/TR/voicexml20"><cite>
            Voice Extensible Markup Language (VoiceXML) Version 2.0
          </cite></a>
          , Jim Ferrans, Bruce Lucas, Ken Rehor,
          <em>et al.</em>
          , Editors. World Wide Web Consortium, 16 Mar 2004. This version
          is http://www.w3.org/TR/2004/REC-voicexml20-20040316/. The
          <a href="http://www.w3.org/TR/voicexml20">latest version</a>
          is available at http://www.w3.org/TR/voicexml20.
        </dd><dt class="label"><a name="SMIL2" id="SMIL2"></a>[SMIL2]</dt><dd>
          <a href="http://www.w3.org/TR/SMIL2/"><cite>
            Synchronized Multimedia Integration Language (SMIL 2.1)
          </cite></a>
          , Dick Bulterman <em>et al.</em>, Editors.
          World Wide Web Consortium, 13 Dec 2005. This version is
          http://www.w3.org/TR/2005/REC-SMIL2-20051213/. The
          <a href="http://www.w3.org/TR/SMIL2/">latest version</a>
          is available at http://www.w3.org/TR/SMIL2/.
        </dd><dt class="label"><a name="SVGMobile12" id="SVGMobile12"></a>[SVGMOBILE12]</dt><dd>
          <a href="http://www.w3.org/TR/SVGMobile12/"><cite>
            Scalable Vector Graphics (SVG) Tiny 1.2 Specification
          </cite></a>
          Ola Andersson, Robin Berjon, Erik Dahlström, Andrew Emmons, Jon Ferraiolo,
          Vincent Hardy, Scott Hayman, Dean Jackson, Chris Lilley, Andreas Neumann,
          Craig Northway, Antoine Quint, Nandini Ramani, Doug Schepers, and
          Andrew Shellshear, Editors. World Wide Web Consortium, 10 Aug 2006.
          This version is http://www.w3.org/TR/2006/CR-SVGMobile12-20060810/. 
          The <a href="http://www.w3.org/TR/SVGMobile12/">latest version</a>
          is available at http://www.w3.org/TR/SVGMobile12/.
        </dd><dt class="label"><a name="XFORMS" id="XFORMS"></a>[XFORMS]</dt><dd>
          <a href="http://www.w3.org/TR/2006/REC-xforms-20060314/"><cite>XForms 1.0 (Second Edition)</cite></a>
          , D. Landwehr, J. Boyer, T. V. Raman, M. Dubinko, R. Merrick, L. L. Klotz,  
          Editors, W3C Recommendation, 14 March 2006, http://www.w3.org/TR/2006/REC-xforms-20060314/ . 
          The <a href="http://www.w3.org/TR/xforms/">
          latest version</a> is available at http://www.w3.org/TR/xforms/ .
        </dd><dt class="label"><a name="xhtml11" id="xhtml11"></a>[XHTML11]</dt><dd>
          <a href="http://www.w3.org/TR/xhtml11/"><cite>
            XHTML™ 1.1 - Module-based XHTML
          </cite></a>
          , Murray Altheim and Shane McCarron, Editors. World Wide Web
          Consortium, 31 May 2001. This version is
          http://www.w3.org/TR/2001/REC-xhtml11-20010531. The
          <a href="http://www.w3.org/TR/xhtml11/">latest version</a>
          is available at http://www.w3.org/TR/xhtml11/.
        </dd><dt class="label"><a name="html401" id="html401"></a>[HTML4]</dt><dd>
          <a href="http://www.w3.org/TR/html401"><cite>
            HTML 4.01 Specification
          </cite></a>
          , David Raggett, Arnaud Le Hors, and Ian Jacobs, Editors. World
          Wide Web Consortium, 24 Dec 1999. This version is
          http://www.w3.org/TR/1999/REC-html401-19991224. The
          <a href="http://www.w3.org/TR/html401">latest version</a>
          is available at http://www.w3.org/TR/html401.
        </dd></dl></div></div><div class="div1">
<h2><a name="acknowledgements" id="acknowledgements"></a>D Acknowledgements (Non-Normative)</h2><p>The editors would like to thank the contributors:</p><ul><li><p>Ola Andersson, Ikivo</p></li><li><p>Daniel Appelquist, Vodafone</p></li><li><p>Mark Baker, Research in Motion, Limited, (formerly) Justsystem</p></li><li><p>L. David Baron, The Mozilla Foundation</p></li><li><p>Robin Berjon, Expway</p></li><li><p>Kurt Cagle, Mercurial Communications Inc.</p></li><li><p>Cyril Concolato, Groupe des Écoles des Télécommunications (GET)</p></li><li><p>Erik Dahlström, Opera Software</p></li><li><p>Alex Danilo, W3C Invited Experts</p></li><li><p>Jean-Claude Dufourd, Streamezzo</p></li><li><p>Andrew Emmons, Bitflash Division of Open Text</p></li><li><p>Hae Seok Lee, Infraware</p></li><li><p>Torkel Hambraeus, Ikivo</p></li><li><p>Vincent Hardy (Previous Working Group Chair), Sun Microsystems, Inc.</p></li><li><p>Takanari Hayama, Vodafone</p></li><li><p>Scott Hayman, Research In Motion Limited</p></li><li><p>Ian Hickson, (formerly) Opera Software</p></li><li><p>Masayasu Ishikawa, (Working Group Team Contact) W3C</p></li><li><p>Dean Jackson (previous Working Group Team Contact), W3C</p></li><li><p>Kevin Kelly (Working Group Chair), IBM</p></li><li><p>Anne van Kesteren, Opera Software</p></li><li><p>Rhys Lewis, Volantis</p></li><li><p>Chris Lilley, W3C</p></li><li><p>Lars-Gunnar Lundgren, Obigo</p></li><li><p>Vincent Mahe, France Telecom</p></li><li><p>Charles McCathieNevile, Opera Software</p></li><li><p>Timur Mehrvarz, Vodafone</p></li><li><p>Kunio Ohno, Justsystems Corporation</p></li><li><p>Lasse Pajunen, Nokia</p></li><li><p>Lars Piepel, Vodafone</p></li><li><p>Antoine Quint, Fuchsia Design</p></li><li><p>Julien Quint, DAISY Consortium</p></li><li><p>Nandini Ramani, Sun Microsystems, Inc.</p></li><li><p>Seung Chul Yeh, Infraware</p></li><li><p>Svante Schubert, Sun Microsystems, Inc.</p></li><li><p>Bradley Sipes, Ikivo</p></li><li><p>Steve Speicher, IBM</p></li><li><p>Peter Stark, Sony Ericsson</p></li><li><p>Petri Vuorimaa, Helsinki University of Technology</p></li><li><p>Daniel Zucker, ACCESS Co., Ltd.</p></li></ul></div><div class="div1">
<h2><a name="changes-log" id="changes-log"></a>E Changes Log (Non-Normative)</h2><dl><dt class="label">2007-07-09</dt><dd><ul><li><p>
	        Added XML stylesheet PI
	        as a testable assertion (CL).
	        </p></li></ul></dd><dt class="label">2007-07-01</dt><dd><ul><li><p>
                Prepared CR state. (TM)
              </p></li></ul></dd><dt class="label">2007-04-16</dt><dd><ul><li><p>Updated status of the document to CR. (TM)</p></li><li><p>
                Outcommented changelog entries before 22. December 2006. (TM)
              </p></li></ul></dd><dt class="label">2007-03-31</dt><dd><ul><li><p>Using author list, sorted by last name. (TM)</p></li></ul></dd><dt class="label">2007-03-26</dt><dd><ul><li><p>Split <a href="#references"><b>C References</b></a> into Normative and Informative, made global linking updates. (SKS)</p></li></ul></dd><dt class="label">2007-03-14</dt><dd><ul><li><p>Changed "inclusion boundaries" to "document boundaries" in <a href="#dom"><b>2.1 Document Object Model</b></a>. (JQ)</p></li><li><p>Added the sentence "It is possible for a content author to use child-to-parent (see 2.1.2 Child to Parent DOM Access) or parent-to-child (see 2.1.3 Parent to Child DOM Access) to propagate specific styling properties." right after (JQ)</p></li></ul></dd><dt class="label">2007-02-11</dt><dd><ul><li><p>Defined WICD when first used <a href="#related-documents"><b>1.2 Related Documents</b></a>. (SS)</p></li></ul></dd><dt class="label">2007-03-13</dt><dd><ul><li><p>Sorted the definitions in <a href="#definitions"><b>A Definitions</b></a>. (JQ)</p></li></ul></dd><dt class="label">2007-02-11</dt><dd><ul><li><p>Defined WICD when first used <a href="#related-documents"><b>1.2 Related Documents</b></a>. (SS)</p></li></ul></dd><dt class="label">2007-02-02</dt><dd><ul><li><p>Removed outdated Document Conformance heading and security statement from <a href="#conformance"><b>B Conformance</b></a>. (SS)</p></li></ul></dd></dl></div></div></body></html>