1 /* This file is part of the project "Hilbert II" - http://www.qedeq.org" target="alexandria_uri">http://www.qedeq.org 2 * 3 * Copyright 2000-2014, 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.se.base.module; 17 18 19 /** 20 * Definition of operator. This is a predicate constant. For example the 21 * predicate "x is a set" could be defined in MK with the formula "\exists y: x \in y". 22 * <p> 23 * There must also be the possibility to define basic predicate constants like 24 * "x is element of y". 25 * 26 * @author Michael Meyling 27 */ 28 public interface PredicateDefinition extends NodeType { 29 30 /** 31 * Get number of arguments for the defined object. Carries information about the argument 32 * number the defined object needs. 33 * 34 * @return Argument number. 35 */ 36 public String getArgumentNumber(); 37 38 /** 39 * This name together with {@link #getArgumentNumber()} identifies a predicate. 40 * 41 * @return Name of defined predicate. 42 */ 43 public String getName(); 44 45 /** 46 * Get LaTeX output for definition. The replaceable arguments must are marked as "#1", 47 * "#2" and so on. For example "\mathfrak{M}(#1)" 48 * 49 * @return LaTeX pattern for definition type setting. 50 */ 51 public String getLatexPattern(); 52 53 /** 54 * Get complete formula. That is an equivalence between the new predicate and 55 * the defining formula. 56 * 57 * @return Complete formula. 58 */ 59 public Formula getFormula(); 60 61 /** 62 * Get description. Only necessary if formula is not self-explanatory. 63 * 64 * @return Description. 65 */ 66 public LatexList getDescription(); 67 68 }