01: /*
02: * Copyright (C) 1999-2004 <A href="http://www-ist.massey.ac.nz/JBDietrich" target="_top">Jens Dietrich</a>
03: *
04: * This library is free software; you can redistribute it and/or
05: * modify it under the terms of the GNU Lesser General Public
06: * License as published by the Free Software Foundation; either
07: * version 2 of the License, or (at your option) any later version.
08: *
09: * This library is distributed in the hope that it will be useful,
10: * but WITHOUT ANY WARRANTY; without even the implied warranty of
11: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12: * Lesser General Public License for more details.
13: *
14: * You should have received a copy of the GNU Lesser General Public
15: * License along with this library; if not, write to the Free Software
16: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17: */
18: package org.mandarax.kernel;
19:
20: /**
21: * Feature descriptor for inference engines.
22: * The standard feature names are defined as class constants and their
23: * descriptions are initialized.
24: * @author <A href="http://www-ist.massey.ac.nz/JBDietrich" target="_top">Jens Dietrich</A>
25: * @version 3.4 <7 March 05>
26: * @since 1.0
27: */
28: public class InferenceEngineFeatureDescriptions extends
29: FeatureDescriptions {
30:
31: // constants defining features
32: public static String LOOP_CHECKS = "checks for loops";
33: public static String STRONG_NEGATION = "strong negation";
34: public static String NEGATION_AS_FAILURE = "negation as failure";
35: public static String MULTIPLE_RESULTS = "multiple results";
36: public static String DERIVATION_EVENT_LISTENERS = "derivation event listeners";
37: public static String CUT = "cut";
38:
39: /**
40: * Constructor.
41: */
42: public InferenceEngineFeatureDescriptions() {
43: super ();
44:
45: descriptions.setProperty(LOOP_CHECKS, "handles infinite loops");
46: descriptions.setProperty(MULTIPLE_RESULTS,
47: "can find multiple results");
48: descriptions.setProperty(STRONG_NEGATION,
49: "supports explicit (strong) negation");
50: descriptions.setProperty(NEGATION_AS_FAILURE,
51: "supports negation as failure");
52: }
53: }
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