001    /* ===========================================================
002     * JFreeChart : a free chart library for the Java(tm) platform
003     * ===========================================================
004     *
005     * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
006     *
007     * Project Info:  http://www.jfree.org/jfreechart/index.html
008     *
009     * This library is free software; you can redistribute it and/or modify it 
010     * under the terms of the GNU Lesser General Public License as published by 
011     * the Free Software Foundation; either version 2.1 of the License, or 
012     * (at your option) any later version.
013     *
014     * This library is distributed in the hope that it will be useful, but 
015     * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
016     * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 
017     * License for more details.
018     *
019     * You should have received a copy of the GNU Lesser General Public
020     * License along with this library; if not, write to the Free Software
021     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
022     * USA.  
023     *
024     * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
025     * in the United States and other countries.]
026     *
027     * --------------------
028     * CategoryDataset.java
029     * --------------------
030     * (C) Copyright 2000-2004, by Object Refinery Limited.
031     *
032     * Original Author:  David Gilbert (for Object Refinery Limited);
033     * Contributor(s):   -;
034     *
035     * $Id: CategoryDataset.java,v 1.2.2.1 2005/10/25 21:29:58 mungady Exp $
036     *
037     * Changes (from 21-Aug-2001)
038     * --------------------------
039     * 21-Aug-2001 : Added standard header. Fixed DOS encoding problem (DG);
040     * 18-Sep-2001 : Updated e-mail address in header (DG);
041     * 15-Oct-2001 : Moved to new package (com.jrefinery.data.*) (DG);
042     * 22-Oct-2001 : Renamed DataSource.java --> Dataset.java etc. (DG);
043     * 17-Nov-2001 : Updated Javadoc comments (DG);
044     * 04-Mar-2002 : Updated import statement (DG);
045     * 23-Oct-2002 : Reorganised code (DG);
046     * 10-Jan-2003 : Updated Javadocs (DG);
047     * 21-Jan-2003 : Merged with TableDataset (which only existed in CVS) (DG);
048     * 13-Mar-2003 : Added KeyedValues2DDataset interface (DG);
049     * 23-Apr-2003 : Switched CategoryDataset and KeyedValues2DDataset so that 
050     *               CategoryDataset is the super interface (DG);
051     * 18-Aug-2004 : Moved from org.jfree.data --> org.jfree.data.category (DG);
052     *
053     */
054    
055    package org.jfree.data.category;
056    
057    import org.jfree.data.KeyedValues2D;
058    import org.jfree.data.general.Dataset;
059    
060    /**
061     * The interface for a dataset with one or more series, and values associated 
062     * with categories.
063     * <P>
064     * The categories are represented by <code>Comparable</code> instance, with the
065     * category label being provided by the <code>toString</code> method.
066     */
067    public interface CategoryDataset extends KeyedValues2D, Dataset {
068    
069        // no additional methods required
070    
071    }