http://xml.apache.org/commons/components/external/: xml-commons provides an Apache-hosted set of DOM, SAX, and JAXP interfaces for use in other xml-based projects. Our hope is that we can standardize on both a common version and packaging scheme for these critical XML standards interfaces to make the lives of both our developers and users easier. The External Components portion of xml-commons contains interfaces that are defined by external standards organizations. For DOM, that's the W3C; for SAX it's David Megginson and sax.sourceforge.net; for JAXP it's Sun. 
/*
 * Copyright (c) 2000 World Wide Web Consortium,
 * (Massachusetts Institute of Technology, Institut National de
 * Recherche en Informatique et en Automatique, Keio University). All
 * Rights Reserved. This program is distributed under the W3C's Software
 * Intellectual Property License. This program is distributed in the
 * hope that it will be useful, but WITHOUT ANY WARRANTY; without even
 * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 * PURPOSE.
 * See W3C License http://www.w3.org/Consortium/Legal/ for more details.
 */

package org.w3c.dom.css;

import org.w3c.dom.Element;
import org.w3c.dom.stylesheets.DocumentStyle;


This interface represents a document with a CSS view.

 The getOverrideStyle method provides a mechanism through 
which a DOM author could effect immediate change to the style of an 
element without modifying the explicitly linked style sheets of a 
document or the inline style of elements in the style sheets. This style 
sheet comes after the author style sheet in the cascade algorithm and is 
called override style sheet. The override style sheet takes precedence 
over author style sheets. An "!important" declaration still takes 
precedence over a normal declaration. Override, author, and user style 
sheets all may contain "!important" declarations. User "!important" rules 
take precedence over both override and author "!important" rules, and 
override "!important" rules take precedence over author "!important" 
rules. 

 The expectation is that an instance of the DocumentCSS 
interface can be obtained by using binding-specific casting methods on an 
instance of the Document interface. 

See also the Document Object Model (DOM) Level 2 Style Specification.

Since:DOM Level 2
/**
 * This interface represents a document with a CSS view.
 * <p> The <code>getOverrideStyle</code> method provides a mechanism through 
 * which a DOM author could effect immediate change to the style of an 
 * element without modifying the explicitly linked style sheets of a 
 * document or the inline style of elements in the style sheets. This style 
 * sheet comes after the author style sheet in the cascade algorithm and is 
 * called override style sheet. The override style sheet takes precedence 
 * over author style sheets. An "!important" declaration still takes 
 * precedence over a normal declaration. Override, author, and user style 
 * sheets all may contain "!important" declarations. User "!important" rules 
 * take precedence over both override and author "!important" rules, and 
 * override "!important" rules take precedence over author "!important" 
 * rules. 
 * <p> The expectation is that an instance of the <code>DocumentCSS</code> 
 * interface can be obtained by using binding-specific casting methods on an 
 * instance of the <code>Document</code> interface. 
 * <p>See also the <a href='http://www.w3.org/TR/2000/REC-DOM-Level-2-Style-20001113'>Document Object Model (DOM) Level 2 Style Specification</a>.
 * @since DOM Level 2
 */
public interface DocumentCSS extends DocumentStyle {
    
 This method is used to retrieve the override style declaration for a 
specified element and a specified pseudo-element. 

Params:
  • elt –  The element whose style is to be modified. This parameter 
  cannot be null.
  • pseudoElt –  The pseudo-element or null if none.
Returns: The override style declaration.
/**
     *  This method is used to retrieve the override style declaration for a 
     * specified element and a specified pseudo-element. 
     * @param elt  The element whose style is to be modified. This parameter 
     *   cannot be null. 
     * @param pseudoElt  The pseudo-element or <code>null</code> if none. 
     * @return  The override style declaration. 
     */
    public CSSStyleDeclaration getOverrideStyle(Element elt, 
                                                String pseudoElt);

}