1   /**
2    * Logback: the reliable, generic, fast and flexible logging framework.
3    * Copyright (C) 1999-2022, QOS.ch. All rights reserved.
4    *
5    * This program and the accompanying materials are dual-licensed under
6    * either the terms of the Eclipse Public License v1.0 as published by
7    * the Eclipse Foundation
8    *
9    *   or (per the licensee's choosing)
10   *
11   * under the terms of the GNU Lesser General Public License version 2.1
12   * as published by the Free Software Foundation.
13   */
14  package ch.qos.logback.core.model;
15  
16  import ch.qos.logback.core.CoreConstants;
17  
18  public class ModelConstants {
19  
20      
21      public static final String DEBUG_SYSTEM_PROPERTY_KEY = "logback.debug";
22      public static final String NULL_STR = CoreConstants.NULL_STR;
23  
24      public static final String INVALID_ATTRIBUTES = "In <property> element, either the \"file\" attribute alone, or "
25              + "the \"resource\" element alone, or both the \"name\" and \"value\" attributes must be set.";
26  
27      public static final String PARENT_PROPPERTY_KEY = "parent";
28  }