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Operators | Line # 24 | 0 | 0 | - |
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1 | /* This file is part of the project "Hilbert II" - http://www.qedeq.org | |
2 | * | |
3 | * Copyright 2000-2013, Michael Meyling <mime@qedeq.org>. | |
4 | * | |
5 | * "Hilbert II" is free software; you can redistribute | |
6 | * it and/or modify it under the terms of the GNU General Public | |
7 | * License as published by the Free Software Foundation; either | |
8 | * version 2 of the License, or (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | */ | |
15 | ||
16 | package org.qedeq.kernel.bo.logic.common; | |
17 | ||
18 | /** | |
19 | * Logical and term operators. These strings might occur as values for | |
20 | * {@link org.qedeq.kernel.se.base.list.ElementList#getOperator()}. | |
21 | * | |
22 | * @author Michael Meyling | |
23 | */ | |
24 | public interface Operators { | |
25 | ||
26 | /** Operator string for logical "and". */ | |
27 | public static final String CONJUNCTION_OPERATOR = "AND"; | |
28 | ||
29 | /** Operator string for logical "or". */ | |
30 | public static final String DISJUNCTION_OPERATOR = "OR"; | |
31 | ||
32 | /** Operator string for logical implication. */ | |
33 | public static final String IMPLICATION_OPERATOR = "IMPL"; | |
34 | ||
35 | /** Operator string for logical equivalence. */ | |
36 | public static final String EQUIVALENCE_OPERATOR = "EQUI"; | |
37 | ||
38 | /** Operator string for logical negation. */ | |
39 | public static final String NEGATION_OPERATOR = "NOT"; | |
40 | ||
41 | /** Operator string for logical "all" operator. */ | |
42 | public static final String UNIVERSAL_QUANTIFIER_OPERATOR = "FORALL"; | |
43 | ||
44 | /** Operator string for logical "exists" operator. */ | |
45 | public static final String EXISTENTIAL_QUANTIFIER_OPERATOR = "EXISTS"; | |
46 | ||
47 | /** Operator string for logical "exists unique" operator. */ | |
48 | public static final String UNIQUE_EXISTENTIAL_QUANTIFIER_OPERATOR = "EXISTSU"; | |
49 | ||
50 | /** Operator string for predicate constants. */ | |
51 | public static final String PREDICATE_CONSTANT = "PREDCON"; | |
52 | ||
53 | /** Operator string for predicate variables. */ | |
54 | public static final String PREDICATE_VARIABLE = "PREDVAR"; | |
55 | ||
56 | /** Operator string for subject variables. */ | |
57 | public static final String SUBJECT_VARIABLE = "VAR"; | |
58 | ||
59 | /** Operator string for function constants. */ | |
60 | public static final String FUNCTION_CONSTANT = "FUNCON"; | |
61 | ||
62 | /** Operator string for function constants. */ | |
63 | public static final String FUNCTION_VARIABLE = "FUNVAR"; | |
64 | ||
65 | /** Operator string for class operator. */ | |
66 | public static final String CLASS_OP = "CLASS"; | |
67 | ||
68 | /** Operator string for meta variables. */ | |
69 | public static final String META_VARIABLE = "METAVAR"; | |
70 | ||
71 | } |
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