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/*
    This file is part of JLog.

    Created by Glendon Holst for Alan Mackworth and the 
    "Computational Intelligence: A Logical Approach" text.
    
    Copyright 1998, 2000, 2002 by University of British Columbia and 
    Alan Mackworth.
    
    This notice must remain in all files which belong to, or are derived 
    from JLog.
    
    Check  or 
     for further information
    about JLog, or to contact the authors.
     
    JLog 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.

    JLog 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 JLog; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    URLs:  or 
*/
//#########################################################################
//	Unifiable
//#########################################################################

package ubc.cs.JLog.Foundation;

import java.lang.*;
import java.util.*;
import ubc.cs.JLog.Terms.*;

/**
* This is the interface for terms that support symbolic unification.
*  
* @author       Glendon Holst
* @version      %I%, %G%
*/
public interface iUnifiable
{
 /**
  * Determines if this instance and term unify.
  * Every variable which was previously unbound, but which becomes bound during 
  * the unification must register itself with the jUnifiedVector. It
  * is the callers responsibility to deal with the unified vector.
  *
  * @param term 	the term to unify with this instance.
  * @param v 		the vector of variables bound during unification. Even if 
  *			unification fails, this vector may contain recently
  *			bound vectors.  This parameter is used to as output to the 
  *			caller, not as input for unify.
  * @return 		true if unification succeeded,
  * 			false otherwise.  
  * 			
  */
 public boolean 	unify(jTerm term,jUnifiedVector v);
};