derivation.java

jena2.5.4推理机系统的一种最基本实现 HP实验室出品

/******************************************************************
 * File:        Derivation.java
 * Created by:  Dave Reynolds
 * Created on:  06-Apr-03
 * 
 * (c) Copyright 2003, 2004, 2005, 2006, 2007 Hewlett-Packard Development Company, LP
 * [See end of file]
 * $Id: Derivation.java,v 1.9 2007/01/02 11:52:18 andy_seaborne Exp $
 *****************************************************************/
package com.hp.hpl.jena.reasoner;

import java.io.PrintWriter;

/**
 * Derivation records are used to determine how an inferred triple
 * was derived from a set of source triples and a reasoner. SubClasses
 * provide more specific information.
 * 
 * <p>A future option might be to generate an RDF description of
 * the derivation trace. </p>
 * 
 * @author <a href="mailto:[e-mail]">Dave Reynolds</a>
 * @version $Revision: 1.9 $ on $Date: 2007/01/02 11:52:18 $
 */
public interface Derivation {

    /**
     * Return a short-form description of this derivation.
     */
    public String toString();
    
    /**
     * Print a deep traceback of this derivation back to axioms and 
     * source assertions.
     * @param out the stream to print the trace out to
     * @param bindings set to true to print intermediate variable bindings for
     * each stage in the derivation
     */
    public void printTrace(PrintWriter out, boolean bindings);
}

/*
    (c) Copyright 2003, 2004, 2005, 2006, 2007 Hewlett-Packard Development Company, LP
    All rights reserved.

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    3. The name of the author may not be used to endorse or promote products
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    IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
    OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
    IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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    NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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*/