Bug 136279 Structure and table datatypes should be hidden.
Description: Structure and table datatype should be hidden. Steps to reproduce: In table data binding, I saw structure and table two datatypes. They are not supported now, so they should be removed.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/elements/interfaces/IReportDesignModel.java
* Name of the refresh rate property.
	 */
	public static final String REFRESH_RATE_PROP = "refreshRate"; 
	/**
	 * Name of the method called at the start of the Factory after the
	 * initialize( ) method and before opening the report document (if any).
	 */
	public static final String BEFORE_FACTORY_METHOD = "beforeFactory"; 
	/**
	 * Name of the method called at the end of the Factory after closing the
	 * report document (if any). This is the last method called in the Factory.
	 */
	public static final String AFTER_FACTORY_METHOD = "afterFactory"; 
	/**
	 * Name of the method called just before opening the report document in the
	 * Factory.
	 * @deprecated
	 */
	public static final String BEFORE_OPEN_DOC_METHOD = "beforeOpenDoc"; 
	/**
	 * Name of the method called just after opening the report document in the
	 * Factory.
	 * @deprecated
	 */
	public static final String AFTER_OPEN_DOC_METHOD = "afterOpenDoc"; 
	/**
	 * Name of the method called just before closing the report document file in
	 * the Factory.
	 * @deprecated
	 */