001/**
002 * Logback: the reliable, generic, fast and flexible logging framework.
003 * Copyright (C) 1999-2022, QOS.ch. All rights reserved.
004 *
005 * This program and the accompanying materials are dual-licensed under
006 * either the terms of the Eclipse Public License v1.0 as published by
007 * the Eclipse Foundation
008 *
009 *   or (per the licensee's choosing)
010 *
011 * under the terms of the GNU Lesser General Public License version 2.1
012 * as published by the Free Software Foundation.
013 */
014package ch.qos.logback.core.model;
015
016import ch.qos.logback.core.CoreConstants;
017
018public class ModelConstants {
019
020    
021    public static final String DEBUG_SYSTEM_PROPERTY_KEY = "logback.debug";
022    public static final String NULL_STR = CoreConstants.NULL_STR;
023
024    public static final String INVALID_ATTRIBUTES = "In <property> element, either the \"file\" attribute alone, or "
025            + "the \"resource\" element alone, or both the \"name\" and \"value\" attributes must be set.";
026
027    public static final String PARENT_PROPPERTY_KEY = "parent";
028}