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1 /*
2  * Copyright (c) 2004 World Wide Web Consortium,
3  *
4  * (Massachusetts Institute of Technology, European Research Consortium for
5  * Informatics and Mathematics, Keio University). All Rights Reserved. This
6  * work is distributed under the W3C(r) Software License [1] in the hope that
7  * it will be useful, but WITHOUT ANY WARRANTY; without even the implied
8  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
9  *
10  * [1] http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231
11  */

12
13 package org.w3c.dom;
14
15 /**
16  * This interface represents a known entity, either parsed or unparsed, in an
17  * XML document. Note that this models the entity itself <em>not</em> the entity declaration.
18  * <p>The <code>nodeName</code> attribute that is inherited from
19  * <code>Node</code> contains the name of the entity.
20  * <p>An XML processor may choose to completely expand entities before the
21  * structure model is passed to the DOM; in this case there will be no
22  * <code>EntityReference</code> nodes in the document tree.
23  * <p>XML does not mandate that a non-validating XML processor read and
24  * process entity declarations made in the external subset or declared in
25  * parameter entities. This means that parsed entities declared in the
26  * external subset need not be expanded by some classes of applications, and
27  * that the replacement text of the entity may not be available. When the <a HREF='http://www.w3.org/TR/2004/REC-xml-20040204#intern-replacement'>
28  * replacement text</a> is available, the corresponding <code>Entity</code> node's child list
29  * represents the structure of that replacement value. Otherwise, the child
30  * list is empty.
31  * <p>DOM Level 3 does not support editing <code>Entity</code> nodes; if a
32  * user wants to make changes to the contents of an <code>Entity</code>,
33  * every related <code>EntityReference</code> node has to be replaced in the
34  * structure model by a clone of the <code>Entity</code>'s contents, and
35  * then the desired changes must be made to each of those clones instead.
36  * <code>Entity</code> nodes and all their descendants are readonly.
37  * <p>An <code>Entity</code> node does not have any parent.
38  * <p ><b>Note:</b> If the entity contains an unbound namespace prefix, the
39  * <code>namespaceURI</code> of the corresponding node in the
40  * <code>Entity</code> node subtree is <code>null</code>. The same is true
41  * for <code>EntityReference</code> nodes that refer to this entity, when
42  * they are created using the <code>createEntityReference</code> method of
43  * the <code>Document</code> interface.
44  * <p>See also the <a HREF='http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407'>Document Object Model (DOM) Level 3 Core Specification</a>.
45  */

46 public interface Entity extends Node JavaDoc {
47     /**
48      * The public identifier associated with the entity if specified, and
49      * <code>null</code> otherwise.
50      */

51     public String JavaDoc getPublicId();
52
53     /**
54      * The system identifier associated with the entity if specified, and
55      * <code>null</code> otherwise. This may be an absolute URI or not.
56      */

57     public String JavaDoc getSystemId();
58
59     /**
60      * For unparsed entities, the name of the notation for the entity. For
61      * parsed entities, this is <code>null</code>.
62      */

63     public String JavaDoc getNotationName();
64
65     /**
66      * An attribute specifying the encoding used for this entity at the time
67      * of parsing, when it is an external parsed entity. This is
68      * <code>null</code> if it an entity from the internal subset or if it
69      * is not known.
70      * @since DOM Level 3
71      */

72     public String JavaDoc getInputEncoding();
73
74     /**
75      * An attribute specifying, as part of the text declaration, the encoding
76      * of this entity, when it is an external parsed entity. This is
77      * <code>null</code> otherwise.
78      * @since DOM Level 3
79      */

80     public String JavaDoc getXmlEncoding();
81
82     /**
83      * An attribute specifying, as part of the text declaration, the version
84      * number of this entity, when it is an external parsed entity. This is
85      * <code>null</code> otherwise.
86      * @since DOM Level 3
87      */

88     public String JavaDoc getXmlVersion();
89
90 }
91
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