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/api/ReportDesignHandle.java
{
		return getStringProperty( BEFORE_FACTORY_METHOD );
	}
	/**
	 * Returns the script called just before opening the report document in the
	 * Factory.
	 * 
	 * @return the script
	 * @deprecated
	 */
	public String getBeforeOpenDoc( )
	{
		return ""; 
	}
	/**
	 * Returns the script called before starting a presentation time action.
	 * 
	 * @return the script
	 */
	public String getBeforeRender( )
	{
		return getStringProperty( BEFORE_RENDER_METHOD );
	}
	/**
	 * Returns a slot handle to work with the sections in the report's Body
	 * slot. The order of sections within the slot determines the order in which
	 * the sections print.
	 * 
	 * @return A handle for working with the report sections.
	 */