/*
 * Copyright (c) 2003, 2004 IBM Corporation and others.
 * All rights reserved.   This program and the accompanying materials
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 *
 * Contributors:
 *   IBM - Initial API and implementation
 *
 * $Id: LiteralNull.java,v 1.3 2004/06/03 02:59:17 khussey Exp $
 */
package org.eclipse.uml2;


/**
 * <!-- begin-user-doc -->
 * A representation of the model object '<em><b>Literal Null</b></em>'.
 * <!-- end-user-doc -->
 *
 * <!-- begin-model-doc -->
 * A literal null is used to represent null, i.e., the absence of a value. 
 * <!-- end-model-doc -->
 *
 *
 * @see org.eclipse.uml2.UML2Package#getLiteralNull()
 * @model 
 * @generated
 */
public interface LiteralNull extends LiteralSpecification{
	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	String copyright = "Copyright (c) 2003, 2004 IBM Corporation and others."; //$NON-NLS-1$

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * <!-- begin-model-doc -->
	 * A query based on the following OCL expression:
	 * <code>
	 * true
	 * </code>
	 * <!-- end-model-doc -->
	 * @model dataType="org.eclipse.uml2.Boolean" 
	 * @generated
	 */
	boolean isComputable();

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * <!-- begin-model-doc -->
	 * A query based on the following OCL expression:
	 * <code>
	 * true
	 * </code>
	 * <!-- end-model-doc -->
	 * @model dataType="org.eclipse.uml2.Boolean" 
	 * @generated
	 */
	boolean isNull();

} // LiteralNull