java/10 : java.xml/org/w3c/dom/Node.java

Node

https://openjdk.java.net/

GPLv2 + Classpath Exception

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/*
 * This file is available under and governed by the GNU General Public
 * License version 2 only, as published by the Free Software Foundation.
 * However, the following notice accompanied the original version of this
 * file and, per its terms, should not be removed:
 *
 * Copyright (c) 2004 World Wide Web Consortium,
 *
 * (Massachusetts Institute of Technology, European Research Consortium for
 * Informatics and Mathematics, Keio University). All Rights Reserved. This
 * work is distributed under the W3C(r) Software License [1] in the hope that
 * it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * [1] http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231
 */

package org.w3c.dom;

The Node interface is the primary datatype for the entire
Document Object Model. It represents a single node in the document tree.
While all objects implementing the Node interface expose
methods for dealing with children, not all objects implementing the
Node interface may have children. For example,
Text nodes may not have children, and adding children to
such nodes results in a DOMException being raised.
The attributes nodeName, nodeValue and
attributes are included as a mechanism to get at node
information without casting down to the specific derived interface. In
cases where there is no obvious mapping of these attributes for a
specific nodeType (e.g., nodeValue for an
Element or attributes for a Comment
), this returns null. Note that the specialized interfaces
may contain additional and more convenient mechanisms to get and set the
relevant information.
The values of nodeName,
nodeValue, and attributes vary according to the
node type as follows:

Interface table


Interface
nodeName
nodeValue
attributes





Attr
same as Attr.name
same as
Attr.value
null


CDATASection

"#cdata-section"
same as CharacterData.data, the
content of the CDATA Section
null


Comment

"#comment"
same as CharacterData.data, the
content of the comment
null


Document

"#document"
null
null



DocumentFragment
"#document-fragment"

null
null


DocumentType
same as
DocumentType.name
null
null



Element
same as Element.tagName
null

NamedNodeMap


Entity
entity name
null

null


EntityReference
name of entity referenced

null
null


Notation
notation name

null
null


ProcessingInstruction
same
as ProcessingInstruction.target
same as
ProcessingInstruction.data
null


Text

"#text"
same as CharacterData.data, the content
of the text node
null



See also the Document Object Model (DOM) Level 3 Core Specification.
/**
 * The <code>Node</code> interface is the primary datatype for the entire
 * Document Object Model. It represents a single node in the document tree.
 * While all objects implementing the <code>Node</code> interface expose
 * methods for dealing with children, not all objects implementing the
 * <code>Node</code> interface may have children. For example,
 * <code>Text</code> nodes may not have children, and adding children to
 * such nodes results in a <code>DOMException</code> being raised.
 * <p>The attributes <code>nodeName</code>, <code>nodeValue</code> and
 * <code>attributes</code> are included as a mechanism to get at node
 * information without casting down to the specific derived interface. In
 * cases where there is no obvious mapping of these attributes for a
 * specific <code>nodeType</code> (e.g., <code>nodeValue</code> for an
 * <code>Element</code> or <code>attributes</code> for a <code>Comment</code>
 * ), this returns <code>null</code>. Note that the specialized interfaces
 * may contain additional and more convenient mechanisms to get and set the
 * relevant information.
 * <p>The values of <code>nodeName</code>,
 * <code>nodeValue</code>, and <code>attributes</code> vary according to the
 * node type as follows:
 * <table class="striped">
 * <caption style="display:none">Interface table</caption>
 * <thead>
 * <tr>
 * <th scope="col">Interface</th>
 * <th scope="col">nodeName</th>
 * <th scope="col">nodeValue</th>
 * <th scope="col">attributes</th>
 * </tr>
 * </thead>
 * <tbody>
 * <tr>
 * <th scope="row">
 * <code>Attr</code></th>
 * <td>same as <code>Attr.name</code></td>
 * <td>same as
 * <code>Attr.value</code></td>
 * <td><code>null</code></td>
 * </tr>
 * <tr>
 * <th scope="row"><code>CDATASection</code></th>
 * <td>
 * <code>"#cdata-section"</code></td>
 * <td>same as <code>CharacterData.data</code>, the
 * content of the CDATA Section</td>
 * <td><code>null</code></td>
 * </tr>
 * <tr>
 * <th scope="row"><code>Comment</code></th>
 * <td>
 * <code>"#comment"</code></td>
 * <td>same as <code>CharacterData.data</code>, the
 * content of the comment</td>
 * <td><code>null</code></td>
 * </tr>
 * <tr>
 * <th scope="row"><code>Document</code></th>
 * <td>
 * <code>"#document"</code></td>
 * <td><code>null</code></td>
 * <td><code>null</code></td>
 * </tr>
 * <tr>
 * <th scope="row">
 * <code>DocumentFragment</code></th>
 * <td><code>"#document-fragment"</code></td>
 * <td>
 * <code>null</code></td>
 * <td><code>null</code></td>
 * </tr>
 * <tr>
 * <th scope="row"><code>DocumentType</code></th>
 * <td>same as
 * <code>DocumentType.name</code></td>
 * <td><code>null</code></td>
 * <td><code>null</code></td>
 * </tr>
 * <tr>
 * <th scope="row">
 * <code>Element</code></th>
 * <td>same as <code>Element.tagName</code></td>
 * <td><code>null</code></td>
 * <td>
 * <code>NamedNodeMap</code></td>
 * </tr>
 * <tr>
 * <th scope="row"><code>Entity</code></th>
 * <td>entity name</td>
 * <td><code>null</code></td>
 * <td>
 * <code>null</code></td>
 * </tr>
 * <tr>
 * <th scope="row"><code>EntityReference</code></th>
 * <td>name of entity referenced</td>
 * <td>
 * <code>null</code></td>
 * <td><code>null</code></td>
 * </tr>
 * <tr>
 * <th scope="row"><code>Notation</code></th>
 * <td>notation name</td>
 * <td>
 * <code>null</code></td>
 * <td><code>null</code></td>
 * </tr>
 * <tr>
 * <th scope="row"><code>ProcessingInstruction</code></th>
 * <td>same
 * as <code>ProcessingInstruction.target</code></td>
 * <td>same as
 * <code>ProcessingInstruction.data</code></td>
 * <td><code>null</code></td>
 * </tr>
 * <tr>
 * <th scope="row"><code>Text</code></th>
 * <td>
 * <code>"#text"</code></td>
 * <td>same as <code>CharacterData.data</code>, the content
 * of the text node</td>
 * <td><code>null</code></td>
 * </tr>
 * </tbody>
 * </table>
 * <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>.
 */
public interface Node {
    // NodeType
    The node is an Element.
/**
     * The node is an <code>Element</code>.
     */
    public static final short ELEMENT_NODE              = 1;
    The node is an Attr.
/**
     * The node is an <code>Attr</code>.
     */
    public static final short ATTRIBUTE_NODE            = 2;
    The node is a Text node.
/**
     * The node is a <code>Text</code> node.
     */
    public static final short TEXT_NODE                 = 3;
    The node is a CDATASection.
/**
     * The node is a <code>CDATASection</code>.
     */
    public static final short CDATA_SECTION_NODE        = 4;
    The node is an EntityReference.
/**
     * The node is an <code>EntityReference</code>.
     */
    public static final short ENTITY_REFERENCE_NODE     = 5;
    The node is an Entity.
/**
     * The node is an <code>Entity</code>.
     */
    public static final short ENTITY_NODE               = 6;
    The node is a ProcessingInstruction.
/**
     * The node is a <code>ProcessingInstruction</code>.
     */
    public static final short PROCESSING_INSTRUCTION_NODE = 7;
    The node is a Comment.
/**
     * The node is a <code>Comment</code>.
     */
    public static final short COMMENT_NODE              = 8;
    The node is a Document.
/**
     * The node is a <code>Document</code>.
     */
    public static final short DOCUMENT_NODE             = 9;
    The node is a DocumentType.
/**
     * The node is a <code>DocumentType</code>.
     */
    public static final short DOCUMENT_TYPE_NODE        = 10;
    The node is a DocumentFragment.
/**
     * The node is a <code>DocumentFragment</code>.
     */
    public static final short DOCUMENT_FRAGMENT_NODE    = 11;
    The node is a Notation.
/**
     * The node is a <code>Notation</code>.
     */
    public static final short NOTATION_NODE             = 12;

    The name of this node, depending on its type; see the table above.
/**
     * The name of this node, depending on its type; see the table above.
     */
    public String getNodeName();

    The value of this node, depending on its type; see the table above.
When it is defined to be null, setting it has no effect,
including if the node is read-only.
Throws: DOMException – 
  DOMSTRING_SIZE_ERR: Raised when it would return more characters than
  fit in a DOMString variable on the implementation
  platform./**
     * The value of this node, depending on its type; see the table above.
     * When it is defined to be <code>null</code>, setting it has no effect,
     * including if the node is read-only.
     * @exception DOMException
     *   DOMSTRING_SIZE_ERR: Raised when it would return more characters than
     *   fit in a <code>DOMString</code> variable on the implementation
     *   platform.
     */
    public String getNodeValue()
                              throws DOMException;
    The value of this node, depending on its type; see the table above.
When it is defined to be null, setting it has no effect,
including if the node is read-only.
Throws: DOMException – 
  NO_MODIFICATION_ALLOWED_ERR: Raised when the node is readonly and if
  it is not defined to be null./**
     * The value of this node, depending on its type; see the table above.
     * When it is defined to be <code>null</code>, setting it has no effect,
     * including if the node is read-only.
     * @exception DOMException
     *   NO_MODIFICATION_ALLOWED_ERR: Raised when the node is readonly and if
     *   it is not defined to be <code>null</code>.
     */
    public void setNodeValue(String nodeValue)
                              throws DOMException;

    A code representing the type of the underlying object, as defined above.
/**
     * A code representing the type of the underlying object, as defined above.
     */
    public short getNodeType();

    The parent of this node. All nodes, except Attr,
Document, DocumentFragment,
Entity, and Notation may have a parent.
However, if a node has just been created and not yet added to the
tree, or if it has been removed from the tree, this is
null.
/**
     * The parent of this node. All nodes, except <code>Attr</code>,
     * <code>Document</code>, <code>DocumentFragment</code>,
     * <code>Entity</code>, and <code>Notation</code> may have a parent.
     * However, if a node has just been created and not yet added to the
     * tree, or if it has been removed from the tree, this is
     * <code>null</code>.
     */
    public Node getParentNode();

    A NodeList that contains all children of this node. If
there are no children, this is a NodeList containing no
nodes.
/**
     * A <code>NodeList</code> that contains all children of this node. If
     * there are no children, this is a <code>NodeList</code> containing no
     * nodes.
     */
    public NodeList getChildNodes();

    The first child of this node. If there is no such node, this returns
null.
/**
     * The first child of this node. If there is no such node, this returns
     * <code>null</code>.
     */
    public Node getFirstChild();

    The last child of this node. If there is no such node, this returns
null.
/**
     * The last child of this node. If there is no such node, this returns
     * <code>null</code>.
     */
    public Node getLastChild();

    The node immediately preceding this node. If there is no such node,
this returns null.
/**
     * The node immediately preceding this node. If there is no such node,
     * this returns <code>null</code>.
     */
    public Node getPreviousSibling();

    The node immediately following this node. If there is no such node,
this returns null.
/**
     * The node immediately following this node. If there is no such node,
     * this returns <code>null</code>.
     */
    public Node getNextSibling();

    A NamedNodeMap containing the attributes of this node (if
it is an Element) or null otherwise.
/**
     * A <code>NamedNodeMap</code> containing the attributes of this node (if
     * it is an <code>Element</code>) or <code>null</code> otherwise.
     */
    public NamedNodeMap getAttributes();

    The Document object associated with this node. This is
also the Document object used to create new nodes. When
this node is a Document or a DocumentType
which is not used with any Document yet, this is
null.
Since: 1.4, DOM Level 2/**
     * The <code>Document</code> object associated with this node. This is
     * also the <code>Document</code> object used to create new nodes. When
     * this node is a <code>Document</code> or a <code>DocumentType</code>
     * which is not used with any <code>Document</code> yet, this is
     * <code>null</code>.
     *
     * @since 1.4, DOM Level 2
     */
    public Document getOwnerDocument();

    Inserts the node newChild before the existing child node
refChild. If refChild is null,
insert newChild at the end of the list of children.

If newChild is a DocumentFragment object,
all of its children are inserted, in the same order, before
refChild. If the newChild is already in the
tree, it is first removed.
Note:  Inserting a node before itself is implementation
dependent.
Params: newChild – The node to insert.
refChild – The reference node, i.e., the node before which the
  new node must be inserted.
Throws: DOMException – 
  HIERARCHY_REQUEST_ERR: Raised if this node is of a type that does not
  allow children of the type of the newChild node, or if
  the node to insert is one of this node's ancestors or this node
  itself, or if this node is of type Document and the
  DOM application attempts to insert a second
  DocumentType or Element node.
  
WRONG_DOCUMENT_ERR: Raised if newChild was created
  from a different document than the one that created this node.
  
NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly or
  if the parent of the node being inserted is readonly.
  
NOT_FOUND_ERR: Raised if refChild is not a child of
  this node.
  
NOT_SUPPORTED_ERR: if this node is of type Document,
  this exception might be raised if the DOM implementation doesn't
  support the insertion of a DocumentType or
  Element node.
Returns: The node being inserted.
Since: 1.4, DOM Level 3/**
     * Inserts the node <code>newChild</code> before the existing child node
     * <code>refChild</code>. If <code>refChild</code> is <code>null</code>,
     * insert <code>newChild</code> at the end of the list of children.
     * <br>If <code>newChild</code> is a <code>DocumentFragment</code> object,
     * all of its children are inserted, in the same order, before
     * <code>refChild</code>. If the <code>newChild</code> is already in the
     * tree, it is first removed.
     * <p ><b>Note:</b>  Inserting a node before itself is implementation
     * dependent.
     * @param newChild The node to insert.
     * @param refChild The reference node, i.e., the node before which the
     *   new node must be inserted.
     * @return The node being inserted.
     * @exception DOMException
     *   HIERARCHY_REQUEST_ERR: Raised if this node is of a type that does not
     *   allow children of the type of the <code>newChild</code> node, or if
     *   the node to insert is one of this node's ancestors or this node
     *   itself, or if this node is of type <code>Document</code> and the
     *   DOM application attempts to insert a second
     *   <code>DocumentType</code> or <code>Element</code> node.
     *   <br>WRONG_DOCUMENT_ERR: Raised if <code>newChild</code> was created
     *   from a different document than the one that created this node.
     *   <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly or
     *   if the parent of the node being inserted is readonly.
     *   <br>NOT_FOUND_ERR: Raised if <code>refChild</code> is not a child of
     *   this node.
     *   <br>NOT_SUPPORTED_ERR: if this node is of type <code>Document</code>,
     *   this exception might be raised if the DOM implementation doesn't
     *   support the insertion of a <code>DocumentType</code> or
     *   <code>Element</code> node.
     *
     * @since 1.4, DOM Level 3
     */
    public Node insertBefore(Node newChild,
                             Node refChild)
                             throws DOMException;

    Replaces the child node oldChild with newChild
 in the list of children, and returns the oldChild node.

If newChild is a DocumentFragment object,
oldChild is replaced by all of the
DocumentFragment children, which are inserted in the
same order. If the newChild is already in the tree, it
is first removed.
Note:  Replacing a node with itself is implementation
dependent.
Params: newChild – The new node to put in the child list.
oldChild – The node being replaced in the list.
Throws: DOMException – 
  HIERARCHY_REQUEST_ERR: Raised if this node is of a type that does not
  allow children of the type of the newChild node, or if
  the node to put in is one of this node's ancestors or this node
  itself, or if this node is of type Document and the
  result of the replacement operation would add a second
  DocumentType or Element on the
  Document node.
  
WRONG_DOCUMENT_ERR: Raised if newChild was created
  from a different document than the one that created this node.
  
NO_MODIFICATION_ALLOWED_ERR: Raised if this node or the parent of
  the new node is readonly.
  
NOT_FOUND_ERR: Raised if oldChild is not a child of
  this node.
  
NOT_SUPPORTED_ERR: if this node is of type Document,
  this exception might be raised if the DOM implementation doesn't
  support the replacement of the DocumentType child or
  Element child.
Returns: The node replaced.
Since: 1.4, DOM Level 3/**
     * Replaces the child node <code>oldChild</code> with <code>newChild</code>
     *  in the list of children, and returns the <code>oldChild</code> node.
     * <br>If <code>newChild</code> is a <code>DocumentFragment</code> object,
     * <code>oldChild</code> is replaced by all of the
     * <code>DocumentFragment</code> children, which are inserted in the
     * same order. If the <code>newChild</code> is already in the tree, it
     * is first removed.
     * <p ><b>Note:</b>  Replacing a node with itself is implementation
     * dependent.
     * @param newChild The new node to put in the child list.
     * @param oldChild The node being replaced in the list.
     * @return The node replaced.
     * @exception DOMException
     *   HIERARCHY_REQUEST_ERR: Raised if this node is of a type that does not
     *   allow children of the type of the <code>newChild</code> node, or if
     *   the node to put in is one of this node's ancestors or this node
     *   itself, or if this node is of type <code>Document</code> and the
     *   result of the replacement operation would add a second
     *   <code>DocumentType</code> or <code>Element</code> on the
     *   <code>Document</code> node.
     *   <br>WRONG_DOCUMENT_ERR: Raised if <code>newChild</code> was created
     *   from a different document than the one that created this node.
     *   <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this node or the parent of
     *   the new node is readonly.
     *   <br>NOT_FOUND_ERR: Raised if <code>oldChild</code> is not a child of
     *   this node.
     *   <br>NOT_SUPPORTED_ERR: if this node is of type <code>Document</code>,
     *   this exception might be raised if the DOM implementation doesn't
     *   support the replacement of the <code>DocumentType</code> child or
     *   <code>Element</code> child.
     *
     * @since 1.4, DOM Level 3
     */
    public Node replaceChild(Node newChild,
                             Node oldChild)
                             throws DOMException;

    Removes the child node indicated by oldChild from the list
of children, and returns it.
Params: oldChild – The node being removed.
Throws: DOMException – 
  NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
  
NOT_FOUND_ERR: Raised if oldChild is not a child of
  this node.
  
NOT_SUPPORTED_ERR: if this node is of type Document,
  this exception might be raised if the DOM implementation doesn't
  support the removal of the DocumentType child or the
  Element child.
Returns: The node removed.
Since: 1.4, DOM Level 3/**
     * Removes the child node indicated by <code>oldChild</code> from the list
     * of children, and returns it.
     * @param oldChild The node being removed.
     * @return The node removed.
     * @exception DOMException
     *   NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
     *   <br>NOT_FOUND_ERR: Raised if <code>oldChild</code> is not a child of
     *   this node.
     *   <br>NOT_SUPPORTED_ERR: if this node is of type <code>Document</code>,
     *   this exception might be raised if the DOM implementation doesn't
     *   support the removal of the <code>DocumentType</code> child or the
     *   <code>Element</code> child.
     *
     * @since 1.4, DOM Level 3
     */
    public Node removeChild(Node oldChild)
                            throws DOMException;

    Adds the node newChild to the end of the list of children
of this node. If the newChild is already in the tree, it
is first removed.
Params: newChild – The node to add.If it is a
  DocumentFragment object, the entire contents of the
  document fragment are moved into the child list of this node
Throws: DOMException – 
  HIERARCHY_REQUEST_ERR: Raised if this node is of a type that does not
  allow children of the type of the newChild node, or if
  the node to append is one of this node's ancestors or this node
  itself, or if this node is of type Document and the
  DOM application attempts to append a second
  DocumentType or Element node.
  
WRONG_DOCUMENT_ERR: Raised if newChild was created
  from a different document than the one that created this node.
  
NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly or
  if the previous parent of the node being inserted is readonly.
  
NOT_SUPPORTED_ERR: if the newChild node is a child
  of the Document node, this exception might be raised
  if the DOM implementation doesn't support the removal of the
  DocumentType child or Element child.
Returns: The node added.
Since: 1.4, DOM Level 3/**
     * Adds the node <code>newChild</code> to the end of the list of children
     * of this node. If the <code>newChild</code> is already in the tree, it
     * is first removed.
     * @param newChild The node to add.If it is a
     *   <code>DocumentFragment</code> object, the entire contents of the
     *   document fragment are moved into the child list of this node
     * @return The node added.
     * @exception DOMException
     *   HIERARCHY_REQUEST_ERR: Raised if this node is of a type that does not
     *   allow children of the type of the <code>newChild</code> node, or if
     *   the node to append is one of this node's ancestors or this node
     *   itself, or if this node is of type <code>Document</code> and the
     *   DOM application attempts to append a second
     *   <code>DocumentType</code> or <code>Element</code> node.
     *   <br>WRONG_DOCUMENT_ERR: Raised if <code>newChild</code> was created
     *   from a different document than the one that created this node.
     *   <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly or
     *   if the previous parent of the node being inserted is readonly.
     *   <br>NOT_SUPPORTED_ERR: if the <code>newChild</code> node is a child
     *   of the <code>Document</code> node, this exception might be raised
     *   if the DOM implementation doesn't support the removal of the
     *   <code>DocumentType</code> child or <code>Element</code> child.
     *
     * @since 1.4, DOM Level 3
     */
    public Node appendChild(Node newChild)
                            throws DOMException;

    Returns whether this node has any children.
Returns: Returns true if this node has any children,
  false otherwise./**
     * Returns whether this node has any children.
     * @return Returns <code>true</code> if this node has any children,
     *   <code>false</code> otherwise.
     */
    public boolean hasChildNodes();

    Returns a duplicate of this node, i.e., serves as a generic copy
constructor for nodes. The duplicate node has no parent (
parentNode is null) and no user data. User
data associated to the imported node is not carried over. However, if
any UserDataHandlers has been specified along with the
associated data these handlers will be called with the appropriate
parameters before this method returns.

Cloning an Element copies all attributes and their
values, including those generated by the XML processor to represent
defaulted attributes, but this method does not copy any children it
contains unless it is a deep clone. This includes text contained in
an the Element since the text is contained in a child
Text node. Cloning an Attr directly, as
opposed to be cloned as part of an Element cloning
operation, returns a specified attribute (specified is
true). Cloning an Attr always clones its
children, since they represent its value, no matter whether this is a
deep clone or not. Cloning an EntityReference
automatically constructs its subtree if a corresponding
Entity is available, no matter whether this is a deep
clone or not. Cloning any other type of node simply returns a copy of
this node.

Note that cloning an immutable subtree results in a mutable copy,
but the children of an EntityReference clone are readonly
. In addition, clones of unspecified Attr nodes are
specified. And, cloning Document,
DocumentType, Entity, and
Notation nodes is implementation dependent.
Params: deep – If true, recursively clone the subtree under
  the specified node; if false, clone only the node
  itself (and its attributes, if it is an Element).
Returns: The duplicate node./**
     * Returns a duplicate of this node, i.e., serves as a generic copy
     * constructor for nodes. The duplicate node has no parent (
     * <code>parentNode</code> is <code>null</code>) and no user data. User
     * data associated to the imported node is not carried over. However, if
     * any <code>UserDataHandlers</code> has been specified along with the
     * associated data these handlers will be called with the appropriate
     * parameters before this method returns.
     * <br>Cloning an <code>Element</code> copies all attributes and their
     * values, including those generated by the XML processor to represent
     * defaulted attributes, but this method does not copy any children it
     * contains unless it is a deep clone. This includes text contained in
     * an the <code>Element</code> since the text is contained in a child
     * <code>Text</code> node. Cloning an <code>Attr</code> directly, as
     * opposed to be cloned as part of an <code>Element</code> cloning
     * operation, returns a specified attribute (<code>specified</code> is
     * <code>true</code>). Cloning an <code>Attr</code> always clones its
     * children, since they represent its value, no matter whether this is a
     * deep clone or not. Cloning an <code>EntityReference</code>
     * automatically constructs its subtree if a corresponding
     * <code>Entity</code> is available, no matter whether this is a deep
     * clone or not. Cloning any other type of node simply returns a copy of
     * this node.
     * <br>Note that cloning an immutable subtree results in a mutable copy,
     * but the children of an <code>EntityReference</code> clone are readonly
     * . In addition, clones of unspecified <code>Attr</code> nodes are
     * specified. And, cloning <code>Document</code>,
     * <code>DocumentType</code>, <code>Entity</code>, and
     * <code>Notation</code> nodes is implementation dependent.
     * @param deep If <code>true</code>, recursively clone the subtree under
     *   the specified node; if <code>false</code>, clone only the node
     *   itself (and its attributes, if it is an <code>Element</code>).
     * @return The duplicate node.
     */
    public Node cloneNode(boolean deep);

     Puts all Text nodes in the full depth of the sub-tree
underneath this Node, including attribute nodes, into a
"normal" form where only structure (e.g., elements, comments,
processing instructions, CDATA sections, and entity references)
separates Text nodes, i.e., there are neither adjacent
Text nodes nor empty Text nodes. This can
be used to ensure that the DOM view of a document is the same as if
it were saved and re-loaded, and is useful when operations (such as
XPointer [XPointer]
 lookups) that depend on a particular document tree structure are to
be used. If the parameter "normalize-characters" of the
DOMConfiguration object attached to the
Node.ownerDocument is true, this method
will also fully normalize the characters of the Text
nodes.
Note: In cases where the document contains
CDATASections, the normalize operation alone may not be
sufficient, since XPointers do not differentiate between
Text nodes and CDATASection nodes.
Since: 1.4, DOM Level 3/**
     *  Puts all <code>Text</code> nodes in the full depth of the sub-tree
     * underneath this <code>Node</code>, including attribute nodes, into a
     * "normal" form where only structure (e.g., elements, comments,
     * processing instructions, CDATA sections, and entity references)
     * separates <code>Text</code> nodes, i.e., there are neither adjacent
     * <code>Text</code> nodes nor empty <code>Text</code> nodes. This can
     * be used to ensure that the DOM view of a document is the same as if
     * it were saved and re-loaded, and is useful when operations (such as
     * XPointer [<a href='http://www.w3.org/TR/2003/REC-xptr-framework-20030325/'>XPointer</a>]
     *  lookups) that depend on a particular document tree structure are to
     * be used. If the parameter "normalize-characters" of the
     * <code>DOMConfiguration</code> object attached to the
     * <code>Node.ownerDocument</code> is <code>true</code>, this method
     * will also fully normalize the characters of the <code>Text</code>
     * nodes.
     * <p ><b>Note:</b> In cases where the document contains
     * <code>CDATASections</code>, the normalize operation alone may not be
     * sufficient, since XPointers do not differentiate between
     * <code>Text</code> nodes and <code>CDATASection</code> nodes.
     *
     * @since 1.4, DOM Level 3
     */
    public void normalize();

     Tests whether the DOM implementation implements a specific feature and
that feature is supported by this node, as specified in .
Params: feature –  The name of the feature to test.
version –  This is the version number of the feature to test.
Returns: Returns true if the specified feature is
  supported on this node, false otherwise.
Since: 1.4, DOM Level 2/**
     *  Tests whether the DOM implementation implements a specific feature and
     * that feature is supported by this node, as specified in .
     * @param feature  The name of the feature to test.
     * @param version  This is the version number of the feature to test.
     * @return Returns <code>true</code> if the specified feature is
     *   supported on this node, <code>false</code> otherwise.
     *
     * @since 1.4, DOM Level 2
     */
    public boolean isSupported(String feature,
                               String version);

    The namespace URI of this node, or null if it is
unspecified (see ).

This is not a computed value that is the result of a namespace
lookup based on an examination of the namespace declarations in
scope. It is merely the namespace URI given at creation time.

For nodes of any type other than ELEMENT_NODE and
ATTRIBUTE_NODE and nodes created with a DOM Level 1
method, such as Document.createElement(), this is always
null.
Note: Per the Namespaces in XML Specification [XML Namespaces]
 an attribute does not inherit its namespace from the element it is
attached to. If an attribute is not explicitly given a namespace, it
simply has no namespace.
Since: 1.4, DOM Level 2/**
     * The namespace URI of this node, or <code>null</code> if it is
     * unspecified (see ).
     * <br>This is not a computed value that is the result of a namespace
     * lookup based on an examination of the namespace declarations in
     * scope. It is merely the namespace URI given at creation time.
     * <br>For nodes of any type other than <code>ELEMENT_NODE</code> and
     * <code>ATTRIBUTE_NODE</code> and nodes created with a DOM Level 1
     * method, such as <code>Document.createElement()</code>, this is always
     * <code>null</code>.
     * <p ><b>Note:</b> Per the <em>Namespaces in XML</em> Specification [<a href='http://www.w3.org/TR/1999/REC-xml-names-19990114/'>XML Namespaces</a>]
     *  an attribute does not inherit its namespace from the element it is
     * attached to. If an attribute is not explicitly given a namespace, it
     * simply has no namespace.
     *
     * @since 1.4, DOM Level 2
     */
    public String getNamespaceURI();

    The namespace prefix of this node, or null if it is
unspecified. When it is defined to be null, setting it
has no effect, including if the node is read-only.

Note that setting this attribute, when permitted, changes the
nodeName attribute, which holds the qualified name, as
well as the tagName and name attributes of
the Element and Attr interfaces, when
applicable.

Setting the prefix to null makes it unspecified,
setting it to an empty string is implementation dependent.

Note also that changing the prefix of an attribute that is known to
have a default value, does not make a new attribute with the default
value and the original prefix appear, since the
namespaceURI and localName do not change.

For nodes of any type other than ELEMENT_NODE and
ATTRIBUTE_NODE and nodes created with a DOM Level 1
method, such as createElement from the
Document interface, this is always null.
Since: 1.4, DOM Level 2/**
     * The namespace prefix of this node, or <code>null</code> if it is
     * unspecified. When it is defined to be <code>null</code>, setting it
     * has no effect, including if the node is read-only.
     * <br>Note that setting this attribute, when permitted, changes the
     * <code>nodeName</code> attribute, which holds the qualified name, as
     * well as the <code>tagName</code> and <code>name</code> attributes of
     * the <code>Element</code> and <code>Attr</code> interfaces, when
     * applicable.
     * <br>Setting the prefix to <code>null</code> makes it unspecified,
     * setting it to an empty string is implementation dependent.
     * <br>Note also that changing the prefix of an attribute that is known to
     * have a default value, does not make a new attribute with the default
     * value and the original prefix appear, since the
     * <code>namespaceURI</code> and <code>localName</code> do not change.
     * <br>For nodes of any type other than <code>ELEMENT_NODE</code> and
     * <code>ATTRIBUTE_NODE</code> and nodes created with a DOM Level 1
     * method, such as <code>createElement</code> from the
     * <code>Document</code> interface, this is always <code>null</code>.
     *
     * @since 1.4, DOM Level 2
     */
    public String getPrefix();
    The namespace prefix of this node, or null if it is
unspecified. When it is defined to be null, setting it
has no effect, including if the node is read-only.

Note that setting this attribute, when permitted, changes the
nodeName attribute, which holds the qualified name, as
well as the tagName and name attributes of
the Element and Attr interfaces, when
applicable.

Setting the prefix to null makes it unspecified,
setting it to an empty string is implementation dependent.

Note also that changing the prefix of an attribute that is known to
have a default value, does not make a new attribute with the default
value and the original prefix appear, since the
namespaceURI and localName do not change.

For nodes of any type other than ELEMENT_NODE and
ATTRIBUTE_NODE and nodes created with a DOM Level 1
method, such as createElement from the
Document interface, this is always null.
Throws: DOMException – 
  INVALID_CHARACTER_ERR: Raised if the specified prefix contains an
  illegal character according to the XML version in use specified in
  the Document.xmlVersion attribute.
  
NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
  
NAMESPACE_ERR: Raised if the specified prefix is
  malformed per the Namespaces in XML specification, if the
  namespaceURI of this node is null, if the
  specified prefix is "xml" and the namespaceURI of this
  node is different from "
  http://www.w3.org/XML/1998/namespace", if this node is an attribute and the specified prefix is "xmlns" and
  the namespaceURI of this node is different from "http://www.w3.org/2000/xmlns/", or if this node is an attribute and the qualifiedName of
  this node is "xmlns" [XML Namespaces]
  .
Since: 1.4, DOM Level 2/**
     * The namespace prefix of this node, or <code>null</code> if it is
     * unspecified. When it is defined to be <code>null</code>, setting it
     * has no effect, including if the node is read-only.
     * <br>Note that setting this attribute, when permitted, changes the
     * <code>nodeName</code> attribute, which holds the qualified name, as
     * well as the <code>tagName</code> and <code>name</code> attributes of
     * the <code>Element</code> and <code>Attr</code> interfaces, when
     * applicable.
     * <br>Setting the prefix to <code>null</code> makes it unspecified,
     * setting it to an empty string is implementation dependent.
     * <br>Note also that changing the prefix of an attribute that is known to
     * have a default value, does not make a new attribute with the default
     * value and the original prefix appear, since the
     * <code>namespaceURI</code> and <code>localName</code> do not change.
     * <br>For nodes of any type other than <code>ELEMENT_NODE</code> and
     * <code>ATTRIBUTE_NODE</code> and nodes created with a DOM Level 1
     * method, such as <code>createElement</code> from the
     * <code>Document</code> interface, this is always <code>null</code>.
     * @exception DOMException
     *   INVALID_CHARACTER_ERR: Raised if the specified prefix contains an
     *   illegal character according to the XML version in use specified in
     *   the <code>Document.xmlVersion</code> attribute.
     *   <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
     *   <br>NAMESPACE_ERR: Raised if the specified <code>prefix</code> is
     *   malformed per the Namespaces in XML specification, if the
     *   <code>namespaceURI</code> of this node is <code>null</code>, if the
     *   specified prefix is "xml" and the <code>namespaceURI</code> of this
     *   node is different from "<a href='http://www.w3.org/XML/1998/namespace'>
     *   http://www.w3.org/XML/1998/namespace</a>", if this node is an attribute and the specified prefix is "xmlns" and
     *   the <code>namespaceURI</code> of this node is different from "<a href='http://www.w3.org/2000/xmlns/'>http://www.w3.org/2000/xmlns/</a>", or if this node is an attribute and the <code>qualifiedName</code> of
     *   this node is "xmlns" [<a href='http://www.w3.org/TR/1999/REC-xml-names-19990114/'>XML Namespaces</a>]
     *   .
     *
     * @since 1.4, DOM Level 2
     */
    public void setPrefix(String prefix)
                               throws DOMException;

    Returns the local part of the qualified name of this node.

For nodes of any type other than ELEMENT_NODE and
ATTRIBUTE_NODE and nodes created with a DOM Level 1
method, such as Document.createElement(), this is always
null.
Since: 1.4, DOM Level 2/**
     * Returns the local part of the qualified name of this node.
     * <br>For nodes of any type other than <code>ELEMENT_NODE</code> and
     * <code>ATTRIBUTE_NODE</code> and nodes created with a DOM Level 1
     * method, such as <code>Document.createElement()</code>, this is always
     * <code>null</code>.
     *
     * @since 1.4, DOM Level 2
     */
    public String getLocalName();

    Returns whether this node (if it is an element) has any attributes.
Returns: Returns true if this node has any attributes,
  false otherwise.
Since: 1.4, DOM Level 2/**
     * Returns whether this node (if it is an element) has any attributes.
     * @return Returns <code>true</code> if this node has any attributes,
     *   <code>false</code> otherwise.
     *
     * @since 1.4, DOM Level 2
     */
    public boolean hasAttributes();

    The absolute base URI of this node or null if the
implementation wasn't able to obtain an absolute URI. This value is
computed as described in . However, when the Document
supports the feature "HTML" [DOM Level 2 HTML]
, the base URI is computed using first the value of the href
attribute of the HTML BASE element if any, and the value of the
documentURI attribute from the Document
interface otherwise.
Since: 1.5, DOM Level 3/**
     * The absolute base URI of this node or <code>null</code> if the
     * implementation wasn't able to obtain an absolute URI. This value is
     * computed as described in . However, when the <code>Document</code>
     * supports the feature "HTML" [<a href='http://www.w3.org/TR/2003/REC-DOM-Level-2-HTML-20030109'>DOM Level 2 HTML</a>]
     * , the base URI is computed using first the value of the href
     * attribute of the HTML BASE element if any, and the value of the
     * <code>documentURI</code> attribute from the <code>Document</code>
     * interface otherwise.
     *
     * @since 1.5, DOM Level 3
     */
    public String getBaseURI();

    // DocumentPosition
    The two nodes are disconnected. Order between disconnected nodes is
always implementation-specific.
/**
     * The two nodes are disconnected. Order between disconnected nodes is
     * always implementation-specific.
     */
    public static final short DOCUMENT_POSITION_DISCONNECTED = 0x01;
    The second node precedes the reference node.
/**
     * The second node precedes the reference node.
     */
    public static final short DOCUMENT_POSITION_PRECEDING = 0x02;
    The node follows the reference node.
/**
     * The node follows the reference node.
     */
    public static final short DOCUMENT_POSITION_FOLLOWING = 0x04;
    The node contains the reference node. A node which contains is always
preceding, too.
/**
     * The node contains the reference node. A node which contains is always
     * preceding, too.
     */
    public static final short DOCUMENT_POSITION_CONTAINS = 0x08;
    The node is contained by the reference node. A node which is contained
is always following, too.
/**
     * The node is contained by the reference node. A node which is contained
     * is always following, too.
     */
    public static final short DOCUMENT_POSITION_CONTAINED_BY = 0x10;
    The determination of preceding versus following is
implementation-specific.
/**
     * The determination of preceding versus following is
     * implementation-specific.
     */
    public static final short DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC = 0x20;

    Compares the reference node, i.e. the node on which this method is
being called, with a node, i.e. the one passed as a parameter, with
regard to their position in the document and according to the
document order.
Params: other – The node to compare against the reference node.
Throws: DOMException – 
  NOT_SUPPORTED_ERR: when the compared nodes are from different DOM
  implementations that do not coordinate to return consistent
  implementation-specific results.
Returns: Returns how the node is positioned relatively to the reference
  node.
Since: 1.5, DOM Level 3/**
     * Compares the reference node, i.e. the node on which this method is
     * being called, with a node, i.e. the one passed as a parameter, with
     * regard to their position in the document and according to the
     * document order.
     * @param other The node to compare against the reference node.
     * @return Returns how the node is positioned relatively to the reference
     *   node.
     * @exception DOMException
     *   NOT_SUPPORTED_ERR: when the compared nodes are from different DOM
     *   implementations that do not coordinate to return consistent
     *   implementation-specific results.
     *
     * @since 1.5, DOM Level 3
     */
    public short compareDocumentPosition(Node other)
                                         throws DOMException;

    This attribute returns the text content of this node and its
descendants. When it is defined to be null, setting it
has no effect. On setting, any possible children this node may have
are removed and, if it the new string is not empty or
null, replaced by a single Text node
containing the string this attribute is set to.

 On getting, no serialization is performed, the returned string
does not contain any markup. No whitespace normalization is performed
and the returned string does not contain the white spaces in element
content (see the attribute
Text.isElementContentWhitespace). Similarly, on setting,
no parsing is performed either, the input string is taken as pure
textual content.

The string returned is made of the text content of this node
depending on its type, as defined below:

Node/Content table


Node type
Content





ELEMENT_NODE, ATTRIBUTE_NODE, ENTITY_NODE, ENTITY_REFERENCE_NODE,
DOCUMENT_FRAGMENT_NODE
concatenation of the textContent
attribute value of every child node, excluding COMMENT_NODE and
PROCESSING_INSTRUCTION_NODE nodes. This is the empty string if the
node has no children.


TEXT_NODE, CDATA_SECTION_NODE, COMMENT_NODE,
PROCESSING_INSTRUCTION_NODE
nodeValue


DOCUMENT_NODE,
DOCUMENT_TYPE_NODE, NOTATION_NODE
null



Throws: DOMException – 
  DOMSTRING_SIZE_ERR: Raised when it would return more characters than
  fit in a DOMString variable on the implementation
  platform.
Since: 1.5, DOM Level 3/**
     * This attribute returns the text content of this node and its
     * descendants. When it is defined to be <code>null</code>, setting it
     * has no effect. On setting, any possible children this node may have
     * are removed and, if it the new string is not empty or
     * <code>null</code>, replaced by a single <code>Text</code> node
     * containing the string this attribute is set to.
     * <br> On getting, no serialization is performed, the returned string
     * does not contain any markup. No whitespace normalization is performed
     * and the returned string does not contain the white spaces in element
     * content (see the attribute
     * <code>Text.isElementContentWhitespace</code>). Similarly, on setting,
     * no parsing is performed either, the input string is taken as pure
     * textual content.
     * <br>The string returned is made of the text content of this node
     * depending on its type, as defined below:
     * <table class="striped">
     * <caption style="display:none">Node/Content table</caption>
     * <thead>
     * <tr>
     * <th scope="col">Node type</th>
     * <th scope="col">Content</th>
     * </tr>
     * </thead>
     * <tbody>
     * <tr>
     * <th scope="row">
     * ELEMENT_NODE, ATTRIBUTE_NODE, ENTITY_NODE, ENTITY_REFERENCE_NODE,
     * DOCUMENT_FRAGMENT_NODE</th>
     * <td>concatenation of the <code>textContent</code>
     * attribute value of every child node, excluding COMMENT_NODE and
     * PROCESSING_INSTRUCTION_NODE nodes. This is the empty string if the
     * node has no children.</td>
     * </tr>
     * <tr>
     * <th scope="row">TEXT_NODE, CDATA_SECTION_NODE, COMMENT_NODE,
     * PROCESSING_INSTRUCTION_NODE</th>
     * <td><code>nodeValue</code></td>
     * </tr>
     * <tr>
     * <th scope="row">DOCUMENT_NODE,
     * DOCUMENT_TYPE_NODE, NOTATION_NODE</th>
     * <td><em>null</em></td>
     * </tr>
     * </tbody>
     * </table>
     * @exception DOMException
     *   DOMSTRING_SIZE_ERR: Raised when it would return more characters than
     *   fit in a <code>DOMString</code> variable on the implementation
     *   platform.
     *
     * @since 1.5, DOM Level 3
     */
    public String getTextContent()
                                         throws DOMException;
    This attribute returns the text content of this node and its
descendants. When it is defined to be null, setting it
has no effect. On setting, any possible children this node may have
are removed and, if it the new string is not empty or
null, replaced by a single Text node
containing the string this attribute is set to.

 On getting, no serialization is performed, the returned string
does not contain any markup. No whitespace normalization is performed
and the returned string does not contain the white spaces in element
content (see the attribute
Text.isElementContentWhitespace). Similarly, on setting,
no parsing is performed either, the input string is taken as pure
textual content.

The string returned is made of the text content of this node
depending on its type, as defined below:

Node/Content table


Node type
Content





ELEMENT_NODE, ATTRIBUTE_NODE, ENTITY_NODE, ENTITY_REFERENCE_NODE,
DOCUMENT_FRAGMENT_NODE
concatenation of the textContent
attribute value of every child node, excluding COMMENT_NODE and
PROCESSING_INSTRUCTION_NODE nodes. This is the empty string if the
node has no children.


TEXT_NODE, CDATA_SECTION_NODE, COMMENT_NODE,
PROCESSING_INSTRUCTION_NODE
nodeValue


DOCUMENT_NODE,
DOCUMENT_TYPE_NODE, NOTATION_NODE
null



Throws: DOMException – 
  NO_MODIFICATION_ALLOWED_ERR: Raised when the node is readonly.
Since: 1.5, DOM Level 3/**
     * This attribute returns the text content of this node and its
     * descendants. When it is defined to be <code>null</code>, setting it
     * has no effect. On setting, any possible children this node may have
     * are removed and, if it the new string is not empty or
     * <code>null</code>, replaced by a single <code>Text</code> node
     * containing the string this attribute is set to.
     * <br> On getting, no serialization is performed, the returned string
     * does not contain any markup. No whitespace normalization is performed
     * and the returned string does not contain the white spaces in element
     * content (see the attribute
     * <code>Text.isElementContentWhitespace</code>). Similarly, on setting,
     * no parsing is performed either, the input string is taken as pure
     * textual content.
     * <br>The string returned is made of the text content of this node
     * depending on its type, as defined below:
     * <table class="striped">
     * <caption style="display:none">Node/Content table</caption>
     * <thead>
     * <tr>
     * <th scope="col">Node type</th>
     * <th scope="col">Content</th>
     * </tr>
     * </thead>
     * <tbody>
     * <tr>
     * <th scope="row">
     * ELEMENT_NODE, ATTRIBUTE_NODE, ENTITY_NODE, ENTITY_REFERENCE_NODE,
     * DOCUMENT_FRAGMENT_NODE</th>
     * <td>concatenation of the <code>textContent</code>
     * attribute value of every child node, excluding COMMENT_NODE and
     * PROCESSING_INSTRUCTION_NODE nodes. This is the empty string if the
     * node has no children.</td>
     * </tr>
     * <tr>
     * <th scope="row">TEXT_NODE, CDATA_SECTION_NODE, COMMENT_NODE,
     * PROCESSING_INSTRUCTION_NODE</th>
     * <td><code>nodeValue</code></td>
     * </tr>
     * <tr>
     * <th scope="row">DOCUMENT_NODE,
     * DOCUMENT_TYPE_NODE, NOTATION_NODE</th>
     * <td><em>null</em></td>
     * </tr>
     * </tbody>
     * </table>
     * @exception DOMException
     *   NO_MODIFICATION_ALLOWED_ERR: Raised when the node is readonly.
     *
     * @since 1.5, DOM Level 3
     */
    public void setTextContent(String textContent)
                                         throws DOMException;

    Returns whether this node is the same node as the given one.

This method provides a way to determine whether two
Node references returned by the implementation reference
the same object. When two Node references are references
to the same object, even if through a proxy, the references may be
used completely interchangeably, such that all attributes have the
same values and calling the same DOM method on either reference
always has exactly the same effect.
Params: other – The node to test against.
Returns: Returns true if the nodes are the same,
  false otherwise.
Since: 1.5, DOM Level 3/**
     * Returns whether this node is the same node as the given one.
     * <br>This method provides a way to determine whether two
     * <code>Node</code> references returned by the implementation reference
     * the same object. When two <code>Node</code> references are references
     * to the same object, even if through a proxy, the references may be
     * used completely interchangeably, such that all attributes have the
     * same values and calling the same DOM method on either reference
     * always has exactly the same effect.
     * @param other The node to test against.
     * @return Returns <code>true</code> if the nodes are the same,
     *   <code>false</code> otherwise.
     *
     * @since 1.5, DOM Level 3
     */
    public boolean isSameNode(Node other);

    Look up the prefix associated to the given namespace URI, starting from
this node. The default namespace declarations are ignored by this
method.

See  for details on the algorithm used by this method.
Params: namespaceURI – The namespace URI to look for.
Returns: Returns an associated namespace prefix if found or
  null if none is found. If more than one prefix are
  associated to the namespace prefix, the returned namespace prefix
  is implementation dependent.
Since: 1.5, DOM Level 3/**
     * Look up the prefix associated to the given namespace URI, starting from
     * this node. The default namespace declarations are ignored by this
     * method.
     * <br>See  for details on the algorithm used by this method.
     * @param namespaceURI The namespace URI to look for.
     * @return Returns an associated namespace prefix if found or
     *   <code>null</code> if none is found. If more than one prefix are
     *   associated to the namespace prefix, the returned namespace prefix
     *   is implementation dependent.
     *
     * @since 1.5, DOM Level 3
     */
    public String lookupPrefix(String namespaceURI);

     This method checks if the specified namespaceURI is the
default namespace or not.
Params: namespaceURI – The namespace URI to look for.
Returns: Returns true if the specified
  namespaceURI is the default namespace,
  false otherwise.
Since: 1.5, DOM Level 3/**
     *  This method checks if the specified <code>namespaceURI</code> is the
     * default namespace or not.
     * @param namespaceURI The namespace URI to look for.
     * @return Returns <code>true</code> if the specified
     *   <code>namespaceURI</code> is the default namespace,
     *   <code>false</code> otherwise.
     *
     * @since 1.5, DOM Level 3
     */
    public boolean isDefaultNamespace(String namespaceURI);

    Look up the namespace URI associated to the given prefix, starting from
this node.

See  for details on the algorithm used by this method.
Params: prefix – The prefix to look for. If this parameter is
  null, the method will return the default namespace URI
  if any.
Returns: Returns the associated namespace URI or null if
  none is found.
Since: 1.5, DOM Level 3/**
     * Look up the namespace URI associated to the given prefix, starting from
     * this node.
     * <br>See  for details on the algorithm used by this method.
     * @param prefix The prefix to look for. If this parameter is
     *   <code>null</code>, the method will return the default namespace URI
     *   if any.
     * @return Returns the associated namespace URI or <code>null</code> if
     *   none is found.
     *
     * @since 1.5, DOM Level 3
     */
    public String lookupNamespaceURI(String prefix);

    Tests whether two nodes are equal.

This method tests for equality of nodes, not sameness (i.e.,
whether the two nodes are references to the same object) which can be
tested with Node.isSameNode(). All nodes that are the
same will also be equal, though the reverse may not be true.

Two nodes are equal if and only if the following conditions are
satisfied:

The two nodes are of the same type.

The following string
attributes are equal: nodeName, localName,
namespaceURI, prefix, nodeValue
. This is: they are both null, or they have the same
length and are character for character identical.

The
attributes NamedNodeMaps are equal. This
is: they are both null, or they have the same length and
for each node that exists in one map there is a node that exists in
the other map and is equal, although not necessarily at the same
index.

The childNodes NodeLists are equal.
This is: they are both null, or they have the same
length and contain equal nodes at the same index. Note that
normalization can affect equality; to avoid this, nodes should be
normalized before being compared.



For two DocumentType nodes to be equal, the following
conditions must also be satisfied:

The following string attributes
are equal: publicId, systemId,
internalSubset.

The entities
NamedNodeMaps are equal.

The notations
NamedNodeMaps are equal.



On the other hand, the following do not affect equality: the
ownerDocument, baseURI, and
parentNode attributes, the specified
attribute for Attr nodes, the schemaTypeInfo
 attribute for Attr and Element nodes, the
Text.isElementContentWhitespace attribute for
Text nodes, as well as any user data or event listeners
registered on the nodes.
Note:  As a general rule, anything not mentioned in the
description above is not significant in consideration of equality
checking. Note that future versions of this specification may take
into account more attributes and implementations conform to this
specification are expected to be updated accordingly.
Params: arg – The node to compare equality with.
Returns: Returns true if the nodes are equal,
  false otherwise.
Since: 1.5, DOM Level 3/**
     * Tests whether two nodes are equal.
     * <br>This method tests for equality of nodes, not sameness (i.e.,
     * whether the two nodes are references to the same object) which can be
     * tested with <code>Node.isSameNode()</code>. All nodes that are the
     * same will also be equal, though the reverse may not be true.
     * <br>Two nodes are equal if and only if the following conditions are
     * satisfied:
     * <ul>
     * <li>The two nodes are of the same type.
     * </li>
     * <li>The following string
     * attributes are equal: <code>nodeName</code>, <code>localName</code>,
     * <code>namespaceURI</code>, <code>prefix</code>, <code>nodeValue</code>
     * . This is: they are both <code>null</code>, or they have the same
     * length and are character for character identical.
     * </li>
     * <li>The
     * <code>attributes</code> <code>NamedNodeMaps</code> are equal. This
     * is: they are both <code>null</code>, or they have the same length and
     * for each node that exists in one map there is a node that exists in
     * the other map and is equal, although not necessarily at the same
     * index.
     * </li>
     * <li>The <code>childNodes</code> <code>NodeLists</code> are equal.
     * This is: they are both <code>null</code>, or they have the same
     * length and contain equal nodes at the same index. Note that
     * normalization can affect equality; to avoid this, nodes should be
     * normalized before being compared.
     * </li>
     * </ul>
     * <br>For two <code>DocumentType</code> nodes to be equal, the following
     * conditions must also be satisfied:
     * <ul>
     * <li>The following string attributes
     * are equal: <code>publicId</code>, <code>systemId</code>,
     * <code>internalSubset</code>.
     * </li>
     * <li>The <code>entities</code>
     * <code>NamedNodeMaps</code> are equal.
     * </li>
     * <li>The <code>notations</code>
     * <code>NamedNodeMaps</code> are equal.
     * </li>
     * </ul>
     * <br>On the other hand, the following do not affect equality: the
     * <code>ownerDocument</code>, <code>baseURI</code>, and
     * <code>parentNode</code> attributes, the <code>specified</code>
     * attribute for <code>Attr</code> nodes, the <code>schemaTypeInfo</code>
     *  attribute for <code>Attr</code> and <code>Element</code> nodes, the
     * <code>Text.isElementContentWhitespace</code> attribute for
     * <code>Text</code> nodes, as well as any user data or event listeners
     * registered on the nodes.
     * <p ><b>Note:</b>  As a general rule, anything not mentioned in the
     * description above is not significant in consideration of equality
     * checking. Note that future versions of this specification may take
     * into account more attributes and implementations conform to this
     * specification are expected to be updated accordingly.
     * @param arg The node to compare equality with.
     * @return Returns <code>true</code> if the nodes are equal,
     *   <code>false</code> otherwise.
     *
     * @since 1.5, DOM Level 3
     */
    public boolean isEqualNode(Node arg);

     This method returns a specialized object which implements the
specialized APIs of the specified feature and version, as specified
in . The specialized object may also be obtained by using
binding-specific casting methods but is not necessarily expected to,
as discussed in . This method also allow the implementation to
provide specialized objects which do not support the Node
 interface.
Params: feature –  The name of the feature requested. Note that any plus
  sign "+" prepended to the name of the feature will be ignored since
  it is not significant in the context of this method.
version –  This is the version number of the feature to test.
Returns:  Returns an object which implements the specialized APIs of
  the specified feature and version, if any, or null if
  there is no object which implements interfaces associated with that
  feature. If the DOMObject returned by this method
  implements the Node interface, it must delegate to the
  primary core Node and not return results inconsistent
  with the primary core Node such as attributes,
  childNodes, etc.
Since: 1.5, DOM Level 3/**
     *  This method returns a specialized object which implements the
     * specialized APIs of the specified feature and version, as specified
     * in . The specialized object may also be obtained by using
     * binding-specific casting methods but is not necessarily expected to,
     * as discussed in . This method also allow the implementation to
     * provide specialized objects which do not support the <code>Node</code>
     *  interface.
     * @param feature  The name of the feature requested. Note that any plus
     *   sign "+" prepended to the name of the feature will be ignored since
     *   it is not significant in the context of this method.
     * @param version  This is the version number of the feature to test.
     * @return  Returns an object which implements the specialized APIs of
     *   the specified feature and version, if any, or <code>null</code> if
     *   there is no object which implements interfaces associated with that
     *   feature. If the <code>DOMObject</code> returned by this method
     *   implements the <code>Node</code> interface, it must delegate to the
     *   primary core <code>Node</code> and not return results inconsistent
     *   with the primary core <code>Node</code> such as attributes,
     *   childNodes, etc.
     *
     * @since 1.5, DOM Level 3
     */
    public Object getFeature(String feature,
                             String version);

    Associate an object to a key on this node. The object can later be
retrieved from this node by calling getUserData with the
same key.
Params: key – The key to associate the object to.
data – The object to associate to the given key, or
  null to remove any existing association to that key.
handler – The handler to associate to that key, or
  null.
Returns: Returns the DOMUserData previously associated to
  the given key on this node, or null if there was none.
Since: 1.5, DOM Level 3/**
     * Associate an object to a key on this node. The object can later be
     * retrieved from this node by calling <code>getUserData</code> with the
     * same key.
     * @param key The key to associate the object to.
     * @param data The object to associate to the given key, or
     *   <code>null</code> to remove any existing association to that key.
     * @param handler The handler to associate to that key, or
     *   <code>null</code>.
     * @return Returns the <code>DOMUserData</code> previously associated to
     *   the given key on this node, or <code>null</code> if there was none.
     *
     * @since 1.5, DOM Level 3
     */
    public Object setUserData(String key,
                              Object data,
                              UserDataHandler handler);

    Retrieves the object associated to a key on a this node. The object
must first have been set to this node by calling
setUserData with the same key.
Params: key – The key the object is associated to.
Returns: Returns the DOMUserData associated to the given
  key on this node, or null if there was none.
Since: 1.5, DOM Level 3/**
     * Retrieves the object associated to a key on a this node. The object
     * must first have been set to this node by calling
     * <code>setUserData</code> with the same key.
     * @param key The key the object is associated to.
     * @return Returns the <code>DOMUserData</code> associated to the given
     *   key on this node, or <code>null</code> if there was none.
     *
     * @since 1.5, DOM Level 3
     */
    public Object getUserData(String key);

}

Interface	nodeName	nodeValue	attributes
`Attr`	same as `Attr.name`	same as `Attr.value`	`null`
`CDATASection`	`"#cdata-section"`	same as `CharacterData.data`, the content of the CDATA Section	`null`
`Comment`	`"#comment"`	same as `CharacterData.data`, the content of the comment	`null`
`Document`	`"#document"`	`null`	`null`
`DocumentFragment`	`"#document-fragment"`	`null`	`null`
`DocumentType`	same as `DocumentType.name`	`null`	`null`
`Element`	same as `Element.tagName`	`null`	`NamedNodeMap`
`Entity`	entity name	`null`	`null`
`EntityReference`	name of entity referenced	`null`	`null`
`Notation`	notation name	`null`	`null`
`ProcessingInstruction`	same as `ProcessingInstruction.target`	same as `ProcessingInstruction.data`	`null`
`Text`	`"#text"`	same as `CharacterData.data`, the content of the text node	`null`

Params:	newChild – The node to insert. refChild – The reference node, i.e., the node before which the new node must be inserted.
Throws:	DOMException – HIERARCHY_REQUEST_ERR: Raised if this node is of a type that does not allow children of the type of the `newChild` node, or if the node to insert is one of this node's ancestors or this node itself, or if this node is of type `Document` and the DOM application attempts to insert a second `DocumentType` or `Element` node. WRONG_DOCUMENT_ERR: Raised if `newChild` was created from a different document than the one that created this node. NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly or if the parent of the node being inserted is readonly. NOT_FOUND_ERR: Raised if `refChild` is not a child of this node. NOT_SUPPORTED_ERR: if this node is of type `Document`, this exception might be raised if the DOM implementation doesn't support the insertion of a `DocumentType` or `Element` node.
Returns:	The node being inserted.
Since:	1.4, DOM Level 3

Params:	newChild – The new node to put in the child list. oldChild – The node being replaced in the list.
Throws:	DOMException – HIERARCHY_REQUEST_ERR: Raised if this node is of a type that does not allow children of the type of the `newChild` node, or if the node to put in is one of this node's ancestors or this node itself, or if this node is of type `Document` and the result of the replacement operation would add a second `DocumentType` or `Element` on the `Document` node. WRONG_DOCUMENT_ERR: Raised if `newChild` was created from a different document than the one that created this node. NO_MODIFICATION_ALLOWED_ERR: Raised if this node or the parent of the new node is readonly. NOT_FOUND_ERR: Raised if `oldChild` is not a child of this node. NOT_SUPPORTED_ERR: if this node is of type `Document`, this exception might be raised if the DOM implementation doesn't support the replacement of the `DocumentType` child or `Element` child.
Returns:	The node replaced.
Since:	1.4, DOM Level 3

Params:	oldChild – The node being removed.
Throws:	DOMException – NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly. NOT_FOUND_ERR: Raised if `oldChild` is not a child of this node. NOT_SUPPORTED_ERR: if this node is of type `Document`, this exception might be raised if the DOM implementation doesn't support the removal of the `DocumentType` child or the `Element` child.
Returns:	The node removed.
Since:	1.4, DOM Level 3

Params:	newChild – The node to add.If it is a `DocumentFragment` object, the entire contents of the document fragment are moved into the child list of this node
Throws:	DOMException – HIERARCHY_REQUEST_ERR: Raised if this node is of a type that does not allow children of the type of the `newChild` node, or if the node to append is one of this node's ancestors or this node itself, or if this node is of type `Document` and the DOM application attempts to append a second `DocumentType` or `Element` node. WRONG_DOCUMENT_ERR: Raised if `newChild` was created from a different document than the one that created this node. NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly or if the previous parent of the node being inserted is readonly. NOT_SUPPORTED_ERR: if the `newChild` node is a child of the `Document` node, this exception might be raised if the DOM implementation doesn't support the removal of the `DocumentType` child or `Element` child.
Returns:	The node added.
Since:	1.4, DOM Level 3

Params:	deep – If `true`, recursively clone the subtree under the specified node; if `false`, clone only the node itself (and its attributes, if it is an `Element`).
Returns:	The duplicate node.

Params:	feature – The name of the feature to test. version – This is the version number of the feature to test.
Returns:	Returns `true` if the specified feature is supported on this node, `false` otherwise.
Since:	1.4, DOM Level 2

Returns:	Returns `true` if this node has any attributes, `false` otherwise.
Since:	1.4, DOM Level 2

Params:	other – The node to compare against the reference node.
Throws:	DOMException – NOT_SUPPORTED_ERR: when the compared nodes are from different DOM implementations that do not coordinate to return consistent implementation-specific results.
Returns:	Returns how the node is positioned relatively to the reference node.
Since:	1.5, DOM Level 3

Node type	Content
ELEMENT_NODE, ATTRIBUTE_NODE, ENTITY_NODE, ENTITY_REFERENCE_NODE, DOCUMENT_FRAGMENT_NODE	concatenation of the `textContent` attribute value of every child node, excluding COMMENT_NODE and PROCESSING_INSTRUCTION_NODE nodes. This is the empty string if the node has no children.
TEXT_NODE, CDATA_SECTION_NODE, COMMENT_NODE, PROCESSING_INSTRUCTION_NODE	`nodeValue`
DOCUMENT_NODE, DOCUMENT_TYPE_NODE, NOTATION_NODE	null

Throws:	DOMException – DOMSTRING_SIZE_ERR: Raised when it would return more characters than fit in a `DOMString` variable on the implementation platform.
Since:	1.5, DOM Level 3

Params:	other – The node to test against.
Returns:	Returns `true` if the nodes are the same, `false` otherwise.
Since:	1.5, DOM Level 3

Params:	namespaceURI – The namespace URI to look for.
Returns:	Returns an associated namespace prefix if found or `null` if none is found. If more than one prefix are associated to the namespace prefix, the returned namespace prefix is implementation dependent.
Since:	1.5, DOM Level 3

Params:	prefix – The prefix to look for. If this parameter is `null`, the method will return the default namespace URI if any.
Returns:	Returns the associated namespace URI or `null` if none is found.
Since:	1.5, DOM Level 3

Params:	arg – The node to compare equality with.
Returns:	Returns `true` if the nodes are equal, `false` otherwise.
Since:	1.5, DOM Level 3

Params:	feature – The name of the feature requested. Note that any plus sign "+" prepended to the name of the feature will be ignored since it is not significant in the context of this method. version – This is the version number of the feature to test.
Returns:	Returns an object which implements the specialized APIs of the specified feature and version, if any, or `null` if there is no object which implements interfaces associated with that feature. If the `DOMObject` returned by this method implements the `Node` interface, it must delegate to the primary core `Node` and not return results inconsistent with the primary core `Node` such as attributes, childNodes, etc.
Since:	1.5, DOM Level 3

Params:	key – The key to associate the object to. data – The object to associate to the given key, or `null` to remove any existing association to that key. handler – The handler to associate to that key, or `null`.
Returns:	Returns the `DOMUserData` previously associated to the given key on this node, or `null` if there was none.
Since:	1.5, DOM Level 3

Params:	key – The key the object is associated to.
Returns:	Returns the `DOMUserData` associated to the given key on this node, or `null` if there was none.
Since:	1.5, DOM Level 3

/

java/ 10/ java.xml/org/w3c/dom/Node.java