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Java > Open Source Codes > com > hp > hpl > jena > reasoner > Derivation


1 /******************************************************************
2  * File: Derivation.java
3  * Created by: Dave Reynolds
4  * Created on: 06-Apr-03
5  *
6  * (c) Copyright 2003, 2004, 2005 Hewlett-Packard Development Company, LP
7  * [See end of file]
8  * $Id: Derivation.java,v 1.7 2005/02/21 12:16:12 andy_seaborne Exp $
9  *****************************************************************/
10 package com.hp.hpl.jena.reasoner;
11
12 import java.io.PrintWriter JavaDoc;
13
14 /**
15  * Derivation records are used to determine how an inferred triple
16  * was derived from a set of source triples and a reasoner. SubClasses
17  * provide more specific information.
18  *
19  * <p>A future option might be to generate an RDF description of
20  * the derivation trace. </p>
21  *
22  * @author <a HREF="mailto:der@hplb.hpl.hp.com">Dave Reynolds</a>
23  * @version $Revision: 1.7 $ on $Date: 2005/02/21 12:16:12 $
24  */
25 public interface Derivation {
26
27     /**
28      * Return a short-form description of this derivation.
29      */
30     public String JavaDoc toString();
31     
32     /**
33      * Print a deep traceback of this derivation back to axioms and
34      * source assertions.
35      * @param out the stream to print the trace out to
36      * @param bindings set to true to print intermediate variable bindings for
37      * each stage in the derivation
38      */
39     public void printTrace(PrintWriter JavaDoc out, boolean bindings);
40 }
41
42 /*
43     (c) Copyright 2003, 2004, 2005 Hewlett-Packard Development Company, LP
44     All rights reserved.
45
46     Redistribution and use in source and binary forms, with or without
47     modification, are permitted provided that the following conditions
48     are met:
49
50     1. Redistributions of source code must retain the above copyright
51        notice, this list of conditions and the following disclaimer.
52
53     2. Redistributions in binary form must reproduce the above copyright
54        notice, this list of conditions and the following disclaimer in the
55        documentation and/or other materials provided with the distribution.
56
57     3. The name of the author may not be used to endorse or promote products
58        derived from this software without specific prior written permission.
59
60     THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
61     IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
62     OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
63     IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
64     INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
65     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
66     DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
67     THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
68     (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
69     THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
70 */
71
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