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http://www.w3.org/DOM/DOMTM git-svn-id: https://svn.apache.org/repos/asf/xml/commons/trunk@225913 13f79535-47bb-0310-9956-ffa450edef68
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<?xml version="1.0" encoding="UTF-8"?>
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<!-- $Date$ $Revision$ -->
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<!--
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*************************************************************************
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* BEGINNING OF LEVEL TWO CSS *
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*************************************************************************
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-->
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<div1 id="CSS">
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<head>Document Object Model CSS</head>
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<orglist role="editors">
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<member>
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<name>Chris Wilson</name>
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<affiliation>Microsoft Corp.</affiliation>
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</member>
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<member>
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<name>Philippe Le Hégaret</name>
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<affiliation>W3C</affiliation>
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</member>
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<member>
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<name>Vidur Apparao</name>
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<affiliation>Netscape Communications Corp.</affiliation>
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</member>
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</orglist>
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<?GENERATE-MINI-TOC?>
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<!--
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******************************************************
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| INTRODUCTION |
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******************************************************
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-->
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<div2 id="CSS-overview">
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<head>Overview of the DOM Level 2 CSS Interfaces</head>
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<p>
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The DOM Level 2 Cascading Style Sheets (<loc href="&CSS;">CSS</loc>)
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interfaces are designed with the goal of exposing CSS constructs to
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object model consumers. Cascading Style Sheets is a declarative syntax
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for defining presentation rules, properties and ancillary constructs used
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to format and render Web documents. This document specifies a mechanism
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to programmatically access and modify the rich style and presentation
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control provided by CSS (specifically CSS level 2 <bibref
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ref='CSS2'/>). This augments CSS by providing a mechanism to dynamically
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control the inclusion and exclusion of individual style sheets, as well
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as manipulate CSS rules and properties.
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</p>
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<p>
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The CSS interfaces are organized in a logical, rather than
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physical structure. A collection of all style sheets
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referenced by or embedded in the document is accessible on
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the document interface. Each item in this collection exposes
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the properties common to all style sheets referenced or embedded
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in HTML and XML documents; this interface is described in the
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<specref ref="StyleSheets"/>. User style sheets are
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not accessible through this collection, in part due to potential
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privacy concerns (and certainly read-write issues).
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</p>
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<p>
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For each CSS style sheet, an additional interface is exposed - the
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<code>CSSStyleSheet</code> interface. This interface allows access to
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the collection of rules within a CSS style sheet and methods to modify
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that collection. Interfaces are provided for each specific type of rule
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in CSS2 (e.g. style declarations, <code>@import</code> rules, or
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<code>@font-face</code> rules), as well as a shared generic
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<code>CSSRule</code> interface.
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</p>
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<p>
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The most common type of rule is a style declaration. The
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<code>CSSStyleRule</code> interface that represents this type of rule
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provides string access to the CSS selector of the rule, and access to the
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property declarations through the <code>CSSStyleDeclaration</code>
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interface.
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</p>
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<p>
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Finally, an optional <code>CSS2Properties</code> interface is described;
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this interface (if implemented) provides shortcuts to the string
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values of all the properties in CSS level 2.
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</p>
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<p>
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All CSS objects in the DOM are "live", that is, a change in the style sheet
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is reflected in the computed and actual style.
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</p>
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</div2>
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<div2 id="CSS-fundamental">
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<head>CSS Fundamental Interfaces</head>
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<p>
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The interfaces within this section are considered fundamental CSS
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interfaces, and must be supported by all conforming implementations of
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the CSS module. These interfaces represent CSS style sheets specifically.
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</p>
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<p>
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A DOM application may use the <code>hasFeature(feature, version)</code>
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method of the <code>DOMImplementation</code> interface with parameter
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values "CSS" and "2.0" (respectively) to determine whether or not this
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module is supported by the implementation. In order to fully support this
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module, an implementation must also support the "Core" feature defined
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defined in the DOM Level 2 Core specification <bibref ref="DOMCore"/> and
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the "Views" feature defined in the DOM Level 2 Views specification
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<bibref ref="DOMViews"/>. Please refer to additional information about
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<xspecref
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href='&core.latest.url;/introduction.html#ID-Conformance'>conformance</xspecref>
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in the DOM Level 2 Core specification <bibref ref="DOMCore"/>.
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</p>
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<definitions>
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&css-cssstylesheet;
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&css-cssrulelist;
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&css-cssrule;
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&css-cssstylerule;
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&css-cssmediarule;
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&css-cssfontfacerule;
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&css-csspagerule;
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&css-cssimportrule;
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&css-csscharsetrule;
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&css-cssunknownrule;
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&css-cssstyledeclaration;
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&css-cssvalue;
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&css-cssprimitivevalue;
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&css-cssvaluelist;
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&css-rgbcolor;
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&css-rect;
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&css-counter;
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</definitions>
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<div3 id="CSS-OverrideAndComputed">
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<head>Override and computed style sheet</head>
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<definitions>
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&css-viewcss;
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&css-documentcss;
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</definitions>
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</div3>
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<div3 id="CSS-StyleSheetCreation">
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<head>Style sheet creation</head>
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<definitions>
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&css-domimplementationcss;
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</definitions>
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</div3>
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<div3 id="CSS-htmlelementcss">
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<head>Element with CSS inline style</head>
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<definitions>
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&css-elementcssinlinestyle;
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</definitions>
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</div3>
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</div2>
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<div2 id="CSS-extended">
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<head>CSS2 Extended Interface</head>
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<p>
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The interface found within this section are not mandatory. A DOM
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application may use the <code>hasFeature(feature, version)</code> method
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of the <code>DOMImplementation</code> interface with parameter values
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"CSS2" and "2.0" (respectively) to determine whether or not this module
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is supported by the implementation. In order to fully support this
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module, an implementation must also support the "CSS" feature defined
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defined in <specref ref="CSS-fundamental"/>. Please refer to additional
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information about <xspecref
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href='&core.latest.url;/introduction.html#ID-Conformance'>conformance</xspecref>
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in the DOM Level 2 Core specification <bibref ref="DOMCore"/>.
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</p>
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<definitions>
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&css-css2properties;
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</definitions>
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</div2>
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</div1>
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<!--
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*************************************************************************
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* END OF LEVEL TWO CSS *
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*************************************************************************
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-->
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