1/* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18// $Id: XMLConstants.java 584477 2007-10-14 02:44:03Z mrglavas $ 19 20package javax.xml; 21 22/** 23 * <p>Utility class to contain basic XML values as constants.</p> 24 * 25 * @author <a href="mailto:Jeff.Suttor@Sun.com">Jeff Suttor</a> 26 * @version $Revision: 584477 $, $Date: 2007-10-13 19:44:03 -0700 (Sat, 13 Oct 2007) $ 27 * @see <a href="http://www.w3.org/TR/xml11/">Extensible Markup Language (XML) 1.1</a> 28 * @see <a href="http://www.w3.org/TR/REC-xml">Extensible Markup Language (XML) 1.0 (Second Edition)</a> 29 * @see <a href="http://www.w3.org/XML/xml-V10-2e-errata">XML 1.0 Second Edition Specification Errata</a> 30 * @see <a href="http://www.w3.org/TR/xml-names11/">Namespaces in XML 1.1</a> 31 * @see <a href="http://www.w3.org/TR/REC-xml-names">Namespaces in XML</a> 32 * @see <a href="http://www.w3.org/XML/xml-names-19990114-errata">Namespaces in XML Errata</a> 33 * @see <a href="http://www.w3.org/TR/xmlschema-1/">XML Schema Part 1: Structures</a> 34 * @since 1.5 35 **/ 36public final class XMLConstants { 37 38 /** 39 * <p>Private constructor to prevent instantiation.</p> 40 */ 41 private XMLConstants() { 42 } 43 44 /** 45 * <p>Namespace URI to use to represent that there is no Namespace.</p> 46 * 47 * <p>Defined by the Namespace specification to be "".</p> 48 * 49 * @see <a href="http://www.w3.org/TR/REC-xml-names/#defaulting"> 50 * Namespaces in XML, 5.2 Namespace Defaulting</a> 51 */ 52 public static final String NULL_NS_URI = ""; 53 54 /** 55 * <p>Prefix to use to represent the default XML Namespace.</p> 56 * 57 * <p>Defined by the XML specification to be "".</p> 58 * 59 * @see <a href="http://www.w3.org/TR/REC-xml-names/#ns-qualnames"> 60 * Namespaces in XML, 3. Qualified Names</a> 61 */ 62 public static final String DEFAULT_NS_PREFIX = ""; 63 64 /** 65 * <p>The official XML Namespace name URI.</p> 66 * 67 * <p>Defined by the XML specification to be 68 * "<code>http://www.w3.org/XML/1998/namespace</code>".</p> 69 * 70 * @see <a href="http://www.w3.org/TR/REC-xml-names/#ns-qualnames"> 71 * Namespaces in XML, 3. Qualified Names</a> 72 */ 73 public static final String XML_NS_URI = 74 "http://www.w3.org/XML/1998/namespace"; 75 76 /** 77 * <p>The official XML Namespace prefix.</p> 78 * 79 * <p>Defined by the XML specification to be "<code>xml</code>".</p> 80 * 81 * @see <a href="http://www.w3.org/TR/REC-xml-names/#ns-qualnames"> 82 * Namespaces in XML, 3. Qualified Names</a> 83 */ 84 public static final String XML_NS_PREFIX = "xml"; 85 86 /** 87 * <p>The official XML attribute used for specifying XML Namespace 88 * declarations, {@link #XMLNS_ATTRIBUTE 89 * XMLConstants.XMLNS_ATTRIBUTE}, Namespace name URI.</p> 90 * 91 * <p>Defined by the XML specification to be 92 * "<code>http://www.w3.org/2000/xmlns/</code>".</p> 93 * 94 * @see <a href="http://www.w3.org/TR/REC-xml-names/#ns-qualnames"> 95 * Namespaces in XML, 3. Qualified Names</a> 96 * @see <a href="http://www.w3.org/XML/xml-names-19990114-errata/"> 97 * Namespaces in XML Errata</a> 98 */ 99 public static final String XMLNS_ATTRIBUTE_NS_URI = 100 "http://www.w3.org/2000/xmlns/"; 101 102 /** 103 * <p>The official XML attribute used for specifying XML Namespace 104 * declarations.</p> 105 * 106 * <p>It is <strong><em>NOT</em></strong> valid to use as a 107 * prefix. Defined by the XML specification to be 108 * "<code>xmlns</code>".</p> 109 * 110 * @see <a href="http://www.w3.org/TR/REC-xml-names/#ns-qualnames"> 111 * Namespaces in XML, 3. Qualified Names</a> 112 */ 113 public static final String XMLNS_ATTRIBUTE = "xmlns"; 114 115 /** 116 * <p>W3C XML Schema Namespace URI.</p> 117 * 118 * <p>Defined to be "<code>http://www.w3.org/2001/XMLSchema</code>". 119 * 120 * @see <a href="http://www.w3.org/TR/xmlschema-1/#Instance_Document_Constructions"> 121 * XML Schema Part 1: 122 * Structures, 2.6 Schema-Related Markup in Documents Being Validated</a> 123 */ 124 public static final String W3C_XML_SCHEMA_NS_URI = 125 "http://www.w3.org/2001/XMLSchema"; 126 127 /** 128 * <p>W3C XML Schema Instance Namespace URI.</p> 129 * 130 * <p>Defined to be "<code>http://www.w3.org/2001/XMLSchema-instance</code>".</p> 131 * 132 * @see <a href="http://www.w3.org/TR/xmlschema-1/#Instance_Document_Constructions"> 133 * XML Schema Part 1: 134 * Structures, 2.6 Schema-Related Markup in Documents Being Validated</a> 135 */ 136 public static final String W3C_XML_SCHEMA_INSTANCE_NS_URI = 137 "http://www.w3.org/2001/XMLSchema-instance"; 138 139 /** 140 * <p>W3C XPath Datatype Namespace URI.</p> 141 * 142 * <p>Defined to be "<code>http://www.w3.org/2003/11/xpath-datatypes</code>".</p> 143 * 144 * @see <a href="http://www.w3.org/TR/xpath-datamodel">XQuery 1.0 and XPath 2.0 Data Model</a> 145 */ 146 public static final String W3C_XPATH_DATATYPE_NS_URI = "http://www.w3.org/2003/11/xpath-datatypes"; 147 148 /** 149 * <p>XML Document Type Declaration Namespace URI as an arbitrary value.</p> 150 * 151 * <p>Since not formally defined by any existing standard, arbitrarily define to be "<code>http://www.w3.org/TR/REC-xml</code>". 152 */ 153 public static final String XML_DTD_NS_URI = "http://www.w3.org/TR/REC-xml"; 154 155 /** 156 * <p>RELAX NG Namespace URI.</p> 157 * 158 * <p>Defined to be "<code>http://relaxng.org/ns/structure/1.0</code>".</p> 159 * 160 * @see <a href="http://relaxng.org/spec-20011203.html">RELAX NG Specification</a> 161 */ 162 public static final String RELAXNG_NS_URI = "http://relaxng.org/ns/structure/1.0"; 163 164 /** 165 * <p>Feature for secure processing.</p> 166 * 167 * <ul> 168 * <li> 169 * <code>true</code> instructs the implementation to process XML securely. 170 * This may set limits on XML constructs to avoid conditions such as denial of service attacks. 171 * </li> 172 * <li> 173 * <code>false</code> instructs the implementation to process XML according to the letter of the XML specifications 174 * ignoring security issues such as limits on XML constructs to avoid conditions such as denial of service attacks. 175 * </li> 176 * </ul> 177 */ 178 public static final String FEATURE_SECURE_PROCESSING = "http://javax.xml.XMLConstants/feature/secure-processing"; 179} 180