/*     RoadRunner - an automatic wrapper generation system for Web data sources     Copyright (C) 2003  Valter Crescenzi - crescenz@dia.uniroma3.it     This program is  free software;  you can  redistribute it and/or     modify it  under the terms  of the GNU General Public License as     published by  the Free Software Foundation;  either version 2 of     the License, or (at your option) any later version.     This program is distributed in the hope that it  will be useful,     but  WITHOUT ANY WARRANTY;  without even the implied warranty of     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU     General Public License for more details.     You should have received a copy of the GNU General Public License     along with this program; if not, write to the:     Free Software Foundation, Inc.,     59 Temple Place, Suite 330,     Boston, MA 02111-1307 USA     ----     RoadRunner - un sistema per la generazione automatica di wrapper su sorgenti Web     Copyright (C) 2003  Valter Crescenzi - crescenz@dia.uniroma3.it     Questo  programma