content: /*
   * 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 mf.org.w3c.dom;
  
  /**
   * 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 border='1' cellpadding='3'>
   * <tr>
   * <th>Interface</th>
   * <th>nodeName</th>
   * <th>nodeValue</th>
   * <th>attributes</th>
   * </tr>
   * <tr>
   * <td valign='top' rowspan='1' colspan='1'>
   * <code>Attr</code></td>
   * <td valign='top' rowspan='1' colspan='1'>same as <code>Attr.name</code></td>
   * <td valign='top' rowspan='1' colspan='1'>same as
   * <code>Attr.value</code></td>
   * <td valign='top' rowspan='1' colspan='1'><code>null</code></td>
   * </tr>
   * <tr>
   * <td valign='top' rowspan='1' colspan='1'><code>CDATASection</code></td>
   * <td valign='top' rowspan='1' colspan='1'>
   * <code>"#cdata-section"</code></td>
   * <td valign='top' rowspan='1' colspan='1'>same as <code>CharacterData.data</code>, the
   * content of the CDATA Section</td>
   * <td valign='top' rowspan='1' colspan='1'><code>null</code></td>
   * </tr>
   * <tr>
   * <td valign='top' rowspan='1' colspan='1'><code>Comment</code></td>
   * <td valign='top' rowspan='1' colspan='1'>
   * <code>"#comment"</code></td>
   * <td valign='top' rowspan='1' colspan='1'>same as <code>CharacterData.data</code>, the
   * content of the comment</td>
   * <td valign='top' rowspan='1' colspan='1'><code>null</code></td>
   * </tr>
   * <tr>
   * <td valign='top' rowspan='1' colspan='1'><code>Document</code></td>
   * <td valign='top' rowspan='1' colspan='1'>
   * <code>"#document"</code></td>
   * <td valign='top' rowspan='1' colspan='1'><code>null</code></td>
   * <td valign='top' rowspan='1' colspan='1'><code>null</code></td>
   * </tr>
   * <tr>
   * <td valign='top' rowspan='1' colspan='1'>
   * <code>DocumentFragment</code></td>
   * <td valign='top' rowspan='1' colspan='1'><code>"#document-fragment"</code></td>
   * <td valign='top' rowspan='1' colspan='1'>
   * <code>null</code></td>
   * <td valign='top' rowspan='1' colspan='1'><code>null</code></td>
   * </tr>
   * <tr>
   * <td valign='top' rowspan='1' colspan='1'><code>DocumentType</code></td>
   * <td valign='top' rowspan='1' colspan='1'>same as
   * <code>DocumentType.name</code></td>
   * <td valign='top' rowspan='1' colspan='1'><code>null</code></td>
   * <td valign='top' rowspan='1' colspan='1'><code>null</code></td>
   * </tr>
   * <tr>
   * <td valign='top' rowspan='1' colspan='1'>
   * <code>Element</code></td>
   * <td valign='top' rowspan='1' colspan='1'>same as <code>Element.tagName</code></td>
   * <td valign='top' rowspan='1' colspan='1'><code>null</code></td>
   * <td valign='top' rowspan='1' colspan='1'>
   * <code>NamedNodeMap</code></td>
   * </tr>
   * <tr>
   * <td valign='top' rowspan='1' colspan='1'><code>Entity</code></td>
   * <td valign='top' rowspan='1' colspan='1'>entity name</td>
   * <td valign='top' rowspan='1' colspan='1'><code>null</code></td>
   * <td valign='top' rowspan='1' colspan='1'>
   * <code>null</code></td>
   * </tr>
   * <tr>
   * <td valign='top' rowspan='1' colspan='1'><code>EntityReference</code></td>
   * <td valign='top' rowspan='1' colspan='1'>name of entity referenced</td>
   * <td valign='top' rowspan='1' colspan='1'>
   * <code>null</code></td>
   * <td valign='top' rowspan='1' colspan='1'><code>null</code></td>
   * </tr>
   * <tr>
   * <td valign='top' rowspan='1' colspan='1'><code>Notation</code></td>
   * <td valign='top' rowspan='1' colspan='1'>notation name</td>
   * <td valign='top' rowspan='1' colspan='1'>
   * <code>null</code></td>
   * <td valign='top' rowspan='1' colspan='1'><code>null</code></td>
   * </tr>
   * <tr>
   * <td valign='top' rowspan='1' colspan='1'><code>ProcessingInstruction</code></td>
   * <td valign='top' rowspan='1' colspan='1'>same
   * as <code>ProcessingInstruction.target</code></td>
   * <td valign='top' rowspan='1' colspan='1'>same as
   * <code>ProcessingInstruction.data</code></td>
   * <td valign='top' rowspan='1' colspan='1'><code>null</code></td>
   * </tr>
   * <tr>
   * <td valign='top' rowspan='1' colspan='1'><code>Text</code></td>
   * <td valign='top' rowspan='1' colspan='1'>
   * <code>"#text"</code></td>
   * <td valign='top' rowspan='1' colspan='1'>same as <code>CharacterData.data</code>, the content
   * of the text node</td>
   * <td valign='top' rowspan='1' colspan='1'><code>null</code></td>
   * </tr>
   * </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 <code>Element</code>.
       */
      short ELEMENT_NODE = 1;
      /**
       * The node is an <code>Attr</code>.
       */
      short ATTRIBUTE_NODE = 2;
      /**
       * The node is a <code>Text</code> node.
       */
      short TEXT_NODE = 3;
      /**
       * The node is a <code>CDATASection</code>.
       */
      short CDATA_SECTION_NODE = 4;
      /**
       * The node is an <code>EntityReference</code>.
       */
      short ENTITY_REFERENCE_NODE = 5;
      /**
       * The node is an <code>Entity</code>.
       */
      short ENTITY_NODE = 6;
      /**
       * The node is a <code>ProcessingInstruction</code>.
       */
      short PROCESSING_INSTRUCTION_NODE = 7;
      /**
       * The node is a <code>Comment</code>.
       */
      short COMMENT_NODE = 8;
      /**
       * The node is a <code>Document</code>.
       */
      short DOCUMENT_NODE = 9;
      /**
       * The node is a <code>DocumentType</code>.
       */
      short DOCUMENT_TYPE_NODE = 10;
      /**
       * The node is a <code>DocumentFragment</code>.
       */
      short DOCUMENT_FRAGMENT_NODE = 11;
      /**
       * The node is a <code>Notation</code>.
       */
      short NOTATION_NODE = 12;
      /**
       * The two nodes are disconnected. Order between disconnected nodes is
       * always implementation-specific.
       */
      short DOCUMENT_POSITION_DISCONNECTED = 0x01;
      /**
       * The second node precedes the reference node.
       */
      short DOCUMENT_POSITION_PRECEDING = 0x02;
      /**
       * The node follows the reference node.
       */
      short DOCUMENT_POSITION_FOLLOWING = 0x04;
      /**
       * The node contains the reference node. A node which contains is always
       * preceding, too.
       */
      short DOCUMENT_POSITION_CONTAINS = 0x08;
      /**
       * The node is contained by the reference node. A node which is contained
       * is always following, too.
       */
      short DOCUMENT_POSITION_CONTAINED_BY = 0x10;
      /**
       * The determination of preceding versus following is
       * implementation-specific.
       */
      short DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC = 0x20;
  
      /**
       * The name of this node, depending on its type; see the table above.
       */
      String getNodeName();
  
      /**
       * 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.
       *
       * @throws DOMException DOMSTRING_SIZE_ERR: Raised when it would return more characters than
       *                      fit in a <code>DOMString</code> variable on the implementation
       *                      platform.
       */
      String getNodeValue()
              throws DOMException;
  
      /**
       * 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.
       *
       * @throws DOMException NO_MODIFICATION_ALLOWED_ERR: Raised when the node is readonly and if
       *                      it is not defined to be <code>null</code>.
       */
      void setNodeValue(String nodeValue)
              throws DOMException;
  
      /**
       * A code representing the type of the underlying object, as defined above.
       */
      short getNodeType();
  
      /**
       * 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>.
       */
      Node getParentNode();
  
      /**
       * 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.
       */
      NodeList getChildNodes();
  
      /**
       * The first child of this node. If there is no such node, this returns
       * <code>null</code>.
       */
      Node getFirstChild();
  
      /**
       * The last child of this node. If there is no such node, this returns
       * <code>null</code>.
       */
      Node getLastChild();
  
      /**
       * The node immediately preceding this node. If there is no such node,
       * this returns <code>null</code>.
       */
      Node getPreviousSibling();
  
      /**
       * The node immediately following this node. If there is no such node,
       * this returns <code>null</code>.
       */
      Node getNextSibling();
  
      /**
       * A <code>NamedNodeMap</code> containing the attributes of this node (if
       * it is an <code>Element</code>) or <code>null</code> otherwise.
       */
      NamedNodeMap getAttributes();
  
      /**
       * 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 DOM Level 2
       */
      Document getOwnerDocument();
  
      /**
       * 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.
       * @throws 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 DOM Level 3
       */
      Node insertBefore(Node newChild,
                        Node refChild)
              throws DOMException;
  
      /**
       * 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.
       * @throws 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 DOM Level 3
       */
      Node replaceChild(Node newChild,
                        Node oldChild)
              throws DOMException;
  
      /**
       * 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.
       * @throws 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 DOM Level 3
       */
      Node removeChild(Node oldChild)
              throws DOMException;
  
      /**
       * 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.
       * @throws 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 DOM Level 3
       */
      Node appendChild(Node newChild)
              throws DOMException;
  
      /**
       * Returns whether this node has any children.
       *
       * @return Returns <code>true</code> if this node has any children,
       * <code>false</code> otherwise.
       */
      boolean hasChildNodes();
  
      /**
       * 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.
       */
      Node cloneNode(boolean deep);
  
      /**
       * 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 DOM Level 3
       */
      void normalize();
  
      /**
       * 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 DOM Level 2
       */
      boolean isSupported(String feature,
                          String version);
  
      // DocumentPosition
  
      /**
       * 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 DOM Level 2
       */
      String getNamespaceURI();
  
      /**
       * 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 DOM Level 2
       */
      String getPrefix();
  
      /**
       * 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>.
       *
       * @throws 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 DOM Level 2
       */
      void setPrefix(String prefix)
              throws DOMException;
  
      /**
       * 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 DOM Level 2
       */
      String getLocalName();
  
      /**
       * 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 DOM Level 2
       */
      boolean hasAttributes();
  
      /**
       * 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 DOM Level 3
       */
      String getBaseURI();
  
      /**
       * 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.
       * @throws DOMException NOT_SUPPORTED_ERR: when the compared nodes are from different DOM
       *                      implementations that do not coordinate to return consistent
       *                      implementation-specific results.
       * @since DOM Level 3
       */
      short compareDocumentPosition(Node other)
              throws DOMException;
  
      /**
       * 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 border='1' cellpadding='3'>
       * <tr>
       * <th>Node type</th>
       * <th>Content</th>
       * </tr>
       * <tr>
       * <td valign='top' rowspan='1' colspan='1'>
       * ELEMENT_NODE, ATTRIBUTE_NODE, ENTITY_NODE, ENTITY_REFERENCE_NODE,
       * DOCUMENT_FRAGMENT_NODE</td>
       * <td valign='top' rowspan='1' colspan='1'>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>
       * <td valign='top' rowspan='1' colspan='1'>TEXT_NODE, CDATA_SECTION_NODE, COMMENT_NODE,
       * PROCESSING_INSTRUCTION_NODE</td>
       * <td valign='top' rowspan='1' colspan='1'><code>nodeValue</code></td>
       * </tr>
       * <tr>
       * <td valign='top' rowspan='1' colspan='1'>DOCUMENT_NODE,
       * DOCUMENT_TYPE_NODE, NOTATION_NODE</td>
       * <td valign='top' rowspan='1' colspan='1'><em>null</em></td>
       * </tr>
       * </table>
       *
       * @throws DOMException DOMSTRING_SIZE_ERR: Raised when it would return more characters than
       *                      fit in a <code>DOMString</code> variable on the implementation
       *                      platform.
       * @since DOM Level 3
       */
      String getTextContent()
              throws DOMException;
  
      /**
       * 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 border='1' cellpadding='3'>
       * <tr>
       * <th>Node type</th>
       * <th>Content</th>
       * </tr>
       * <tr>
       * <td valign='top' rowspan='1' colspan='1'>
       * ELEMENT_NODE, ATTRIBUTE_NODE, ENTITY_NODE, ENTITY_REFERENCE_NODE,
       * DOCUMENT_FRAGMENT_NODE</td>
       * <td valign='top' rowspan='1' colspan='1'>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>
       * <td valign='top' rowspan='1' colspan='1'>TEXT_NODE, CDATA_SECTION_NODE, COMMENT_NODE,
       * PROCESSING_INSTRUCTION_NODE</td>
       * <td valign='top' rowspan='1' colspan='1'><code>nodeValue</code></td>
       * </tr>
       * <tr>
       * <td valign='top' rowspan='1' colspan='1'>DOCUMENT_NODE,
       * DOCUMENT_TYPE_NODE, NOTATION_NODE</td>
       * <td valign='top' rowspan='1' colspan='1'><em>null</em></td>
       * </tr>
       * </table>
       *
       * @throws DOMException NO_MODIFICATION_ALLOWED_ERR: Raised when the node is readonly.
       * @since DOM Level 3
       */
      void setTextContent(String textContent)
              throws DOMException;
  
      /**
       * 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 DOM Level 3
       */
      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.
       * <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 DOM Level 3
       */
      String lookupPrefix(String namespaceURI);
  
      /**
       * 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 DOM Level 3
       */
      boolean isDefaultNamespace(String namespaceURI);
  
      /**
       * 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 DOM Level 3
       */
      String lookupNamespaceURI(String prefix);
  
      /**
       * 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 DOM Level 3
       */
      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 <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 DOM Level 3
       */
      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 <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 DOM Level 3
       */
      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
       * <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 DOM Level 3
       */
      Object getUserData(String key);
  
  }
  