Bug 130492 Provide a method to serialize the report with library information.
Currently, when engine generate the report document file, the document does not contain any library information. That will cause many propblem on server side. Model should provide a method to serialize the report with library information to a stream so that the generated report document can contain all information that the report need.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/ReferencableStructure.java
/**
	 * Sends the event to all clients in addition to the routing for a design
	 * element.
	 * 
	 * @param ev
	 *            the event to send
	 */
	public void broadcast( NotificationEvent ev )
	{
		ev.setDeliveryPath( NotificationEvent.STRUCTURE_CLIENT );
		for ( int i = 0; i < clients.size( ); i++ )
		{
			( (BackRef) clients.get( i ) ).element.broadcast( ev );
		}
	}
	/**
	 * Checks whether the member of the input name is the referencable member or
	 * not.
	 * 
	 * @param memberName
	 *            the member name to check
	 * @return true if the member with the given name is referencable, otherwise
	 *         false
	 */
	public abstract boolean isReferencableProperty( String memberName );
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.core.Structure#getIntrinsicProperty(java.lang.String)
	 */