/*
 * Copyright (c) 1999 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.
 *
 * $Id: AttributeCondition.java 477010 2006-11-20 02:54:38Z mrglavas $
 */
package org.w3c.css.sac;


/**
 * The Interface AttributeCondition.
 *
 * @author Philippe Le Hegaret
 * @version $Revision: 477010 $
 * @see Condition#SAC_ATTRIBUTE_CONDITION
 * @see Condition#SAC_ONE_OF_ATTRIBUTE_CONDITION
 * @see Condition#SAC_BEGIN_HYPHEN_ATTRIBUTE_CONDITION
 * @see Condition#SAC_ID_CONDITION
 * @see Condition#SAC_CLASS_CONDITION
 * @see Condition#SAC_PSEUDO_CLASS_CONDITION
 */
public interface AttributeCondition extends Condition {

	/**
	 * Returns the <a
	 * href="http://www.w3.org/TR/REC-xml-names/#dt-NSName">namespace URI</a> of
	 * this attribute condition.
	 * <p>
	 * <code>NULL</code> if :
	 * <ul>
	 * <li>this attribute condition can match any namespace.
	 * <li>this attribute is an id attribute.
	 * </ul>
	 *
	 * @return the namespace uri
	 */
	public String getNamespaceURI();

	/**
	 * Returns the <a
	 * href="http://www.w3.org/TR/REC-xml-names/#NT-LocalPart">local part</a> of
	 * the <a href="http://www.w3.org/TR/REC-xml-names/#ns-qualnames">qualified
	 * name</a> of this attribute.
	 * <p>
	 * <code>NULL</code> if :
	 * <ul>
	 * <li>
	 * <p>
	 * this attribute condition can match any attribute.
	 * <li>
	 * <p>
	 * this attribute is a class attribute.
	 * <li>
	 * <p>
	 * this attribute is an id attribute.
	 * <li>
	 * <p>
	 * this attribute is a pseudo-class attribute.
	 * </ul>
	 *
	 * @return the local name
	 */
	public String getLocalName();

	/**
	 * Returns <code>true</code> if the attribute must have an explicit value in
	 * the original document, <code>false</code> otherwise.
	 *
	 * @return the specified
	 */
	public boolean getSpecified();

	/**
	 * Returns the value of the attribute. If this attribute is a class or a
	 * pseudo class attribute, you'll get the class name (or psedo class name)
	 * without the '.' or ':'.
	 *
	 * @return the value
	 */
	public String getValue();
}