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1   /*
2    * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/expr/LogicalExpr.java,v 1.6 2006/11/09 16:21:05 elharo Exp $
3    * $Revision: 1.6 $
4    * $Date: 2006/11/09 16:21:05 $
5    *
6    * ====================================================================
7    *
8    * Copyright 2000-2002 bob mcwhirter & James Strachan.
9    * All rights reserved.
10   *
11   * Redistribution and use in source and binary forms, with or without
12   * modification, are permitted provided that the following conditions are
13   * met:
14   * 
15   *   * Redistributions of source code must retain the above copyright
16   *     notice, this list of conditions and the following disclaimer.
17   * 
18   *   * Redistributions in binary form must reproduce the above copyright
19   *     notice, this list of conditions and the following disclaimer in the
20   *     documentation and/or other materials provided with the distribution.
21   * 
22   *   * Neither the name of the Jaxen Project nor the names of its
23   *     contributors may be used to endorse or promote products derived 
24   *     from this software without specific prior written permission.
25   * 
26   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
27   * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28   * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
29   * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
30   * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
31   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
32   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
33   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
34   * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
35   * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
36   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37   *
38   * ====================================================================
39   * This software consists of voluntary contributions made by many 
40   * individuals on behalf of the Jaxen Project and was originally 
41   * created by bob mcwhirter <bob@werken.com> and 
42   * James Strachan <jstrachan@apache.org>.  For more information on the 
43   * Jaxen Project, please see <http://www.jaxen.org/>.
44   * 
45   * $Id: LogicalExpr.java,v 1.6 2006/11/09 16:21:05 elharo Exp $
46   */
47  package org.jaxen.expr;
48  
49  /***
50   * Represents an XPath logical expression. This represents productions
51   * <a href="http://www.w3.org/TR/xpath#NT-OrExpr">21   OrExpr</a> and 
52   * <a href="http://www.w3.org/TR/xpath#NT-AndExpr">22 AndExpr</a> in the XPath specification.
53   * 
54   * <table><tr valign="baseline">
55   * <td><a name="NT-OrExpr"></a>[21]&nbsp;&nbsp;&nbsp;</td><td>OrExpr</td><td>&nbsp;&nbsp;&nbsp;::=&nbsp;&nbsp;&nbsp;</td><td><a href="http://www.w3.org/TR/xpath#NT-AndExpr">AndExpr</a></td><td></td>
56   * </tr>
57   * <tr valign="baseline">
58   * <td></td><td></td><td></td><td>| <a href="http://www.w3.org/TR/xpath#NT-OrExpr">OrExpr</a> 'or' <a href="http://www.w3.org/TR/xpath#NT-AndExpr">AndExpr</a></td><td></td>
59   * </tr>
60   * <tr valign="baseline">
61   * <td><a name="NT-AndExpr"></a>[22]&nbsp;&nbsp;&nbsp;</td><td>AndExpr</td><td>&nbsp;&nbsp;&nbsp;::=&nbsp;&nbsp;&nbsp;</td><td><a href="http://www.w3.org/TR/xpath#NT-EqualityExpr">EqualityExpr</a></td><td></td>
62   * </tr>
63   * <tr valign="baseline">
64   * <td></td><td></td><td></td><td>| <a href="http://www.w3.org/TR/xpath#NT-AndExpr">AndExpr</a> 'and' <a href="http://www.w3.org/TR/xpath#NT-EqualityExpr">EqualityExpr</a></td><td></td>
65   * </tr></table>
66   * 
67   */
68  public interface LogicalExpr extends BinaryExpr {
69  }