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///////////////////////////////////////////////////////////////////////////////
// For information as to what this class does, see the Javadoc, below.       //
// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,       //
// 2007, 2008, 2009, 2010, 2014, 2015, 2022 by Peter Spirtes, Richard        //
// Scheines, Joseph Ramsey, and Clark Glymour.                               //
//                                                                           //
// 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 //
///////////////////////////////////////////////////////////////////////////////

package edu.cmu.tetrad.data;

import edu.cmu.tetrad.graph.Node;
import edu.cmu.tetrad.util.TetradSerializable;

import java.util.List;

/**
 * Inteface implemented by classes, instantiations of which are associated with lists of variables. Such lists of
 * variables are used for a number of purposes--creating data sets, creating graphs, comparing one data to another, and
 * so on.
 *
 * @author josephramsey
 * @version $Id: $Id
 */
public interface VariableSource extends TetradSerializable {

    /**
     * Returns the list of variables associated with this object.
     *
     * @return the list of variables associated with this object.
     */
    List getVariables();

    /**
     * Returns the variable names associated with this getVariableNames.
     *
     * @return the variable names associated with this getVariableNames.
     */
    List getVariableNames();
}