Bug 176450 Support link to CSS Feature(Model Part)
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/Module.java
*/
	public static final int THEME_NAME_SPACE = 6;
	/**
	 * Identifier for the template parameter definition name space.
	 */
	public static final int TEMPLATE_PARAMETER_NAME_SPACE = 7;
	/**
	 * Identifier for the cube element name space.
	 */
	public static final int CUBE_NAME_SPACE = 8;
	/**
	 * Number of defined name spaces.
	 */
	public static final int NAME_SPACE_COUNT = 9;
	/**
	 * The session that owns this module.
	 */
	protected DesignSession session;
	/**
	 * The number of the next element ID.
	 */
	protected long elementIDCounter = 1;
	/**
	 * The hash map for the id-to-element lookup.
	 */
	protected HashMap idMap = new HashMap( );
	/**
	 * The undo/redo stack for operations on this module.
	 */
	protected ActivityStack activityStack = new ActivityStack( );