1 /*
2 * Copyright 2003-2005 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
25
26 package javax.xml;
27
28 /**
29 * <p>Utility class to contain basic XML values as constants.</p>
30 *
31 * @author <a href="mailto:Jeff.Suttor@Sun.com">Jeff Suttor</a>
32 * @see <a href="http://www.w3.org/TR/xml11/">Extensible Markup Language (XML) 1.1</a>
33 * @see <a href="http://www.w3.org/TR/REC-xml">Extensible Markup Language (XML) 1.0 (Second Edition)</a>
34 * @see <a href="http://www.w3.org/XML/xml-V10-2e-errata">XML 1.0 Second Edition Specification Errata</a>
35 * @see <a href="http://www.w3.org/TR/xml-names11/">Namespaces in XML 1.1</a>
36 * @see <a href="http://www.w3.org/TR/REC-xml-names">Namespaces in XML</a>
37 * @see <a href="http://www.w3.org/XML/xml-names-19990114-errata">Namespaces in XML Errata</a>
38 * @see <a href="http://www.w3.org/TR/xmlschema-1/">XML Schema Part 1: Structures</a>
39 * @since 1.5
40 **/
41
42 public final class XMLConstants {
43
44 /**
45 * <p>Private constructor to prevent instantiation.</p>
46 */
47 private XMLConstants() {
48 }
49
50 /**
51 * <p>Namespace URI to use to represent that there is no Namespace.</p>
52 *
53 * <p>Defined by the Namespace specification to be "".</p>
54 *
55 * @see <a href="http://www.w3.org/TR/REC-xml-names/#defaulting">
56 * Namespaces in XML, 5.2 Namespace Defaulting</a>
57 */
58 public static final String NULL_NS_URI = "";
59
60 /**
61 * <p>Prefix to use to represent the default XML Namespace.</p>
62 *
63 * <p>Defined by the XML specification to be "".</p>
64 *
65 * @see <a
66 * href="http://www.w3.org/TR/REC-xml-names/#ns-qualnames">
67 * Namespaces in XML, 3. Qualified Names</a>
68 */
69 public static final String DEFAULT_NS_PREFIX = "";
70
71 /**
72 * <p>The official XML Namespace name URI.</p>
73 *
74 * <p>Defined by the XML specification to be
75 * "<code>http://www.w3.org/XML/1998/namespace</code>".</p>
76 *
77 * @see <a
78 * href="http://www.w3.org/TR/REC-xml-names/#ns-qualnames">
79 * Namespaces in XML, 3. Qualified Names</a>
80 */
81 public static final String XML_NS_URI =
82 "http://www.w3.org/XML/1998/namespace";
83
84 /**
85 * <p>The official XML Namespace prefix.</p>
86 *
87 * <p>Defined by the XML specification to be "<code>xml</code>".</p>
88 *
89 * @see <a
90 * href="http://www.w3.org/TR/REC-xml-names/#ns-qualnames">
91 * Namespaces in XML, 3. Qualified Names<</a>
92 */
93 public static final String XML_NS_PREFIX = "xml";
94
95 /**
96 * <p>The official XML attribute used for specifying XML Namespace
97 * declarations, {@link #XMLNS_ATTRIBUTE
98 * XMLConstants.XMLNS_ATTRIBUTE}, Namespace name URI.</p>
99 *
100 * <p>Defined by the XML specification to be
101 * "<code>http://www.w3.org/2000/xmlns/</code>".</p>
102 *
103 * @see <a
104 * href="http://www.w3.org/TR/REC-xml-names/#ns-qualnames">
105 * Namespaces in XML, 3. Qualified Names</a>
106 * @see <a
107 * href="http://www.w3.org/XML/xml-names-19990114-errata/">
108 * Namespaces in XML Errata</a>
109 */
110 public static final String XMLNS_ATTRIBUTE_NS_URI =
111 "http://www.w3.org/2000/xmlns/";
112
113 /**
114 * <p>The official XML attribute used for specifying XML Namespace
115 * declarations.</p>
116 *
117 * <p>It is <strong><em>NOT</em></strong> valid to use as a
118 * prefix. Defined by the XML specification to be
119 * "<code>xmlns</code>".</p>
120 *
121 * @see <a
122 * href="http://www.w3.org/TR/REC-xml-names/#ns-qualnames">
123 * Namespaces in XML, 3. Qualified Names</a>
124 */
125 public static final String XMLNS_ATTRIBUTE = "xmlns";
126
127 /**
128 * <p>W3C XML Schema Namespace URI.</p>
129 *
130 * <p>Defined to be "<code>http://www.w3.org/2001/XMLSchema</code>".
131 *
132 * @see <a href=
133 * "http://www.w3.org/TR/xmlschema-1/#Instance_Document_Constructions">
134 * XML Schema Part 1:
135 * Structures, 2.6 Schema-Related Markup in Documents Being Validated</a>
136 */
137 public static final String W3C_XML_SCHEMA_NS_URI =
138 "http://www.w3.org/2001/XMLSchema";
139
140 /**
141 * <p>W3C XML Schema Instance Namespace URI.</p>
142 *
143 * <p>Defined to be "<code>http://www.w3.org/2001/XMLSchema-instance</code>".</p>
144 *
145 * @see <a href=
146 * "http://www.w3.org/TR/xmlschema-1/#Instance_Document_Constructions">
147 * XML Schema Part 1:
148 * Structures, 2.6 Schema-Related Markup in Documents Being Validated</a>
149 */
150 public static final String W3C_XML_SCHEMA_INSTANCE_NS_URI =
151 "http://www.w3.org/2001/XMLSchema-instance";
152
153 /**
154 * <p>W3C XPath Datatype Namespace URI.</p>
155 *
156 * <p>Defined to be "<code>http://www.w3.org/2003/11/xpath-datatypes</code>".</p>
157 *
158 * @see <a href="http://www.w3.org/TR/xpath-datamodel">XQuery 1.0 and XPath 2.0 Data Model</a>
159 */
160 public static final String W3C_XPATH_DATATYPE_NS_URI = "http://www.w3.org/2003/11/xpath-datatypes";
161
162 /**
163 * <p>XML Document Type Declaration Namespace URI as an arbitrary value.</p>
164 *
165 * <p>Since not formally defined by any existing standard, arbitrarily define to be "<code>http://www.w3.org/TR/REC-xml</code>".
166 */
167 public static final String XML_DTD_NS_URI = "http://www.w3.org/TR/REC-xml";
168
169 /**
170 * <p>RELAX NG Namespace URI.</p>
171 *
172 * <p>Defined to be "<code>http://relaxng.org/ns/structure/1.0</code>".</p>
173 *
174 * @see <a href="http://relaxng.org/spec-20011203.html">RELAX NG Specification</a>
175 */
176 public static final String RELAXNG_NS_URI = "http://relaxng.org/ns/structure/1.0";
177
178 /**
179 * <p>Feature for secure processing.</p>
180 *
181 * <ul>
182 * <li>
183 * <code>true</code> instructs the implementation to process XML securely.
184 * This may set limits on XML constructs to avoid conditions such as denial of service attacks.
185 * </li>
186 * <li>
187 * <code>false</code> instructs the implementation to process XML acording the letter of the XML specifications
188 * ingoring security issues such as limits on XML constructs to avoid conditions such as denial of service attacks.
189 * </li>
190 * </ul>
191 */
192 public static final String FEATURE_SECURE_PROCESSING = "http://javax.xml.XMLConstants/feature/secure-processing";
193 }
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