content: /*
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
   * particular file as subject to the "Classpath" exception as provided
   * by Oracle in the LICENSE file that accompanied this code.
   *
   * This code is distributed 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.  See the GNU General Public License
   * version 2 for more details (a copy is included in the LICENSE file that
   * accompanied this code).
   *
   * You should have received a copy of the GNU General Public License version
   * 2 along with this work; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
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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;
  
  import org.w3c.dom.Attr;
  import org.w3c.dom.DOMException;
  import org.w3c.dom.Node;
  import org.w3c.dom.NodeList;
  import org.w3c.dom.TypeInfo;
  
  /**
   * The <code>Element</code> interface represents an element in an HTML or XML
   * document. Elements may have attributes associated with them; since the
   * <code>Element</code> interface inherits from <code>Node</code>, the
   * generic <code>Node</code> interface attribute <code>attributes</code> may
   * be used to retrieve the set of all attributes for an element. There are
   * methods on the <code>Element</code> interface to retrieve either an
   * <code>Attr</code> object by name or an attribute value by name. In XML,
   * where an attribute value may contain entity references, an
   * <code>Attr</code> object should be retrieved to examine the possibly
   * fairly complex sub-tree representing the attribute value. On the other
   * hand, in HTML, where all attributes have simple string values, methods to
   * directly access an attribute value can safely be used as a convenience.
   * <p ><b>Note:</b> In DOM Level 2, the method <code>normalize</code> is
   * inherited from the <code>Node</code> interface where it was moved.
   * <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 Element extends Node {
      /**
       * The name of the element. If <code>Node.localName</code> is different
       * from <code>null</code>, this attribute is a qualified name. For
       * example, in:
       * <pre> &lt;elementExample id="demo"&gt; ...
       * &lt;/elementExample&gt; , </pre>
       *  <code>tagName</code> has the value
       * <code>"elementExample"</code>. Note that this is case-preserving in
       * XML, as are all of the operations of the DOM. The HTML DOM returns
       * the <code>tagName</code> of an HTML element in the canonical
       * uppercase form, regardless of the case in the source HTML document.
       */
      public String getTagName();
  
      /**
       * Retrieves an attribute value by name.
       * @param name The name of the attribute to retrieve.
       * @return The <code>Attr</code> value as a string, or the empty string
       *   if that attribute does not have a specified or default value.
       */
      public String getAttribute(String name);
  
      /**
       * Adds a new attribute. If an attribute with that name is already present
       * in the element, its value is changed to be that of the value
       * parameter. This value is a simple string; it is not parsed as it is
       * being set. So any markup (such as syntax to be recognized as an
       * entity reference) is treated as literal text, and needs to be
       * appropriately escaped by the implementation when it is written out.
       * In order to assign an attribute value that contains entity
       * references, the user must create an <code>Attr</code> node plus any
       * <code>Text</code> and <code>EntityReference</code> nodes, build the
       * appropriate subtree, and use <code>setAttributeNode</code> to assign
       * it as the value of an attribute.
       * <br>To set an attribute with a qualified name and namespace URI, use
       * the <code>setAttributeNS</code> method.
       * @param name The name of the attribute to create or alter.
       * @param value Value to set in string form.
       * @exception org.w3c.dom.DOMException
       *   INVALID_CHARACTER_ERR: Raised if the specified name is not an XML
       *   name 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.
       */
      public void setAttribute(String name,
                               String value)
                               throws org.w3c.dom.DOMException;
  
      /**
       * Removes an attribute by name. If a default value for the removed
       * attribute is defined in the DTD, a new attribute immediately appears
       * with the default value as well as the corresponding namespace URI,
       * local name, and prefix when applicable. The implementation may handle
       * default values from other schemas similarly but applications should
       * use <code>Document.normalizeDocument()</code> to guarantee this
       * information is up-to-date.
       * <br>If no attribute with this name is found, this method has no effect.
       * <br>To remove an attribute by local name and namespace URI, use the
       * <code>removeAttributeNS</code> method.
       * @param name The name of the attribute to remove.
       * @exception org.w3c.dom.DOMException
       *   NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
       */
      public void removeAttribute(String name)
                                  throws org.w3c.dom.DOMException;
  
      /**
       * Retrieves an attribute node by name.
       * <br>To retrieve an attribute node by qualified name and namespace URI,
       * use the <code>getAttributeNodeNS</code> method.
       * @param name The name (<code>nodeName</code>) of the attribute to
       *   retrieve.
       * @return The <code>Attr</code> node with the specified name (
       *   <code>nodeName</code>) or <code>null</code> if there is no such
       *   attribute.
       */
      public org.w3c.dom.Attr getAttributeNode(String name);
  
      /**
       * Adds a new attribute node. If an attribute with that name (
       * <code>nodeName</code>) is already present in the element, it is
       * replaced by the new one. Replacing an attribute node by itself has no
       * effect.
       * <br>To add a new attribute node with a qualified name and namespace
       * URI, use the <code>setAttributeNodeNS</code> method.
       * @param newAttr The <code>Attr</code> node to add to the attribute list.
       * @return If the <code>newAttr</code> attribute replaces an existing
       *   attribute, the replaced <code>Attr</code> node is returned,
       *   otherwise <code>null</code> is returned.
       * @exception org.w3c.dom.DOMException
       *   WRONG_DOCUMENT_ERR: Raised if <code>newAttr</code> was created from a
       *   different document than the one that created the element.
       *   <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
       *   <br>INUSE_ATTRIBUTE_ERR: Raised if <code>newAttr</code> is already an
       *   attribute of another <code>Element</code> object. The DOM user must
       *   explicitly clone <code>Attr</code> nodes to re-use them in other
       *   elements.
       */
      public org.w3c.dom.Attr setAttributeNode(org.w3c.dom.Attr newAttr)
                                   throws org.w3c.dom.DOMException;
  
      /**
       * Removes the specified attribute node. If a default value for the
       * removed <code>Attr</code> node is defined in the DTD, a new node
       * immediately appears with the default value as well as the
       * corresponding namespace URI, local name, and prefix when applicable.
       * The implementation may handle default values from other schemas
       * similarly but applications should use
       * <code>Document.normalizeDocument()</code> to guarantee this
       * information is up-to-date.
       * @param oldAttr The <code>Attr</code> node to remove from the attribute
       *   list.
       * @return The <code>Attr</code> node that was removed.
       * @exception org.w3c.dom.DOMException
       *   NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
       *   <br>NOT_FOUND_ERR: Raised if <code>oldAttr</code> is not an attribute
       *   of the element.
       */
      public org.w3c.dom.Attr removeAttributeNode(org.w3c.dom.Attr oldAttr)
                                      throws org.w3c.dom.DOMException;
  
      /**
       * Returns a <code>NodeList</code> of all descendant <code>Elements</code>
       * with a given tag name, in document order.
       * @param name The name of the tag to match on. The special value "*"
       *   matches all tags.
       * @return A list of matching <code>Element</code> nodes.
       */
      public org.w3c.dom.NodeList getElementsByTagName(String name);
  
      /**
       * Retrieves an attribute value by local name and namespace URI.
       * <br>Per [<a href='http://www.w3.org/TR/1999/REC-xml-names-19990114/'>XML Namespaces</a>]
       * , applications must use the value <code>null</code> as the
       * <code>namespaceURI</code> parameter for methods if they wish to have
       * no namespace.
       * @param namespaceURI The namespace URI of the attribute to retrieve.
       * @param localName The local name of the attribute to retrieve.
       * @return The <code>Attr</code> value as a string, or the empty string
       *   if that attribute does not have a specified or default value.
       * @exception org.w3c.dom.DOMException
       *   NOT_SUPPORTED_ERR: May be raised if the implementation does not
       *   support the feature <code>"XML"</code> and the language exposed
       *   through the Document does not support XML Namespaces (such as [<a href='http://www.w3.org/TR/1999/REC-html401-19991224/'>HTML 4.01</a>]).
       * @since DOM Level 2
       */
      public String getAttributeNS(String namespaceURI,
                                   String localName)
                                   throws org.w3c.dom.DOMException;
  
      /**
       * Adds a new attribute. If an attribute with the same local name and
       * namespace URI is already present on the element, its prefix is
       * changed to be the prefix part of the <code>qualifiedName</code>, and
       * its value is changed to be the <code>value</code> parameter. This
       * value is a simple string; it is not parsed as it is being set. So any
       * markup (such as syntax to be recognized as an entity reference) is
       * treated as literal text, and needs to be appropriately escaped by the
       * implementation when it is written out. In order to assign an
       * attribute value that contains entity references, the user must create
       * an <code>Attr</code> node plus any <code>Text</code> and
       * <code>EntityReference</code> nodes, build the appropriate subtree,
       * and use <code>setAttributeNodeNS</code> or
       * <code>setAttributeNode</code> to assign it as the value of an
       * attribute.
       * <br>Per [<a href='http://www.w3.org/TR/1999/REC-xml-names-19990114/'>XML Namespaces</a>]
       * , applications must use the value <code>null</code> as the
       * <code>namespaceURI</code> parameter for methods if they wish to have
       * no namespace.
       * @param namespaceURI The namespace URI of the attribute to create or
       *   alter.
       * @param qualifiedName The qualified name of the attribute to create or
       *   alter.
       * @param value The value to set in string form.
       * @exception org.w3c.dom.DOMException
       *   INVALID_CHARACTER_ERR: Raised if the specified qualified name is not
       *   an XML name 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 <code>qualifiedName</code> is
       *   malformed per the Namespaces in XML specification, if the
       *   <code>qualifiedName</code> has a prefix and the
       *   <code>namespaceURI</code> is <code>null</code>, if the
       *   <code>qualifiedName</code> has a prefix that is "xml" and the
       *   <code>namespaceURI</code> is different from "<a href='http://www.w3.org/XML/1998/namespace'>
       *   http://www.w3.org/XML/1998/namespace</a>", if the <code>qualifiedName</code> or its prefix is "xmlns" and the
       *   <code>namespaceURI</code> is different from "<a href='http://www.w3.org/2000/xmlns/'>http://www.w3.org/2000/xmlns/</a>", or if the <code>namespaceURI</code> is "<a href='http://www.w3.org/2000/xmlns/'>http://www.w3.org/2000/xmlns/</a>" and neither the <code>qualifiedName</code> nor its prefix is "xmlns".
       *   <br>NOT_SUPPORTED_ERR: May be raised if the implementation does not
       *   support the feature <code>"XML"</code> and the language exposed
       *   through the Document does not support XML Namespaces (such as [<a href='http://www.w3.org/TR/1999/REC-html401-19991224/'>HTML 4.01</a>]).
       * @since DOM Level 2
       */
      public void setAttributeNS(String namespaceURI,
                                 String qualifiedName,
                                 String value)
                                 throws org.w3c.dom.DOMException;
  
      /**
       * Removes an attribute by local name and namespace URI. If a default
       * value for the removed attribute is defined in the DTD, a new
       * attribute immediately appears with the default value as well as the
       * corresponding namespace URI, local name, and prefix when applicable.
       * The implementation may handle default values from other schemas
       * similarly but applications should use
       * <code>Document.normalizeDocument()</code> to guarantee this
       * information is up-to-date.
       * <br>If no attribute with this local name and namespace URI is found,
       * this method has no effect.
       * <br>Per [<a href='http://www.w3.org/TR/1999/REC-xml-names-19990114/'>XML Namespaces</a>]
       * , applications must use the value <code>null</code> as the
       * <code>namespaceURI</code> parameter for methods if they wish to have
       * no namespace.
       * @param namespaceURI The namespace URI of the attribute to remove.
       * @param localName The local name of the attribute to remove.
       * @exception org.w3c.dom.DOMException
       *   NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
       *   <br>NOT_SUPPORTED_ERR: May be raised if the implementation does not
       *   support the feature <code>"XML"</code> and the language exposed
       *   through the Document does not support XML Namespaces (such as [<a href='http://www.w3.org/TR/1999/REC-html401-19991224/'>HTML 4.01</a>]).
       * @since DOM Level 2
       */
      public void removeAttributeNS(String namespaceURI,
                                    String localName)
                                    throws org.w3c.dom.DOMException;
  
      /**
       * Retrieves an <code>Attr</code> node by local name and namespace URI.
       * <br>Per [<a href='http://www.w3.org/TR/1999/REC-xml-names-19990114/'>XML Namespaces</a>]
       * , applications must use the value <code>null</code> as the
       * <code>namespaceURI</code> parameter for methods if they wish to have
       * no namespace.
       * @param namespaceURI The namespace URI of the attribute to retrieve.
       * @param localName The local name of the attribute to retrieve.
       * @return The <code>Attr</code> node with the specified attribute local
       *   name and namespace URI or <code>null</code> if there is no such
       *   attribute.
       * @exception org.w3c.dom.DOMException
       *   NOT_SUPPORTED_ERR: May be raised if the implementation does not
       *   support the feature <code>"XML"</code> and the language exposed
       *   through the Document does not support XML Namespaces (such as [<a href='http://www.w3.org/TR/1999/REC-html401-19991224/'>HTML 4.01</a>]).
       * @since DOM Level 2
       */
      public org.w3c.dom.Attr getAttributeNodeNS(String namespaceURI,
                                                 String localName)
                                     throws org.w3c.dom.DOMException;
  
      /**
       * Adds a new attribute. If an attribute with that local name and that
       * namespace URI is already present in the element, it is replaced by
       * the new one. Replacing an attribute node by itself has no effect.
       * <br>Per [<a href='http://www.w3.org/TR/1999/REC-xml-names-19990114/'>XML Namespaces</a>]
       * , applications must use the value <code>null</code> as the
       * <code>namespaceURI</code> parameter for methods if they wish to have
       * no namespace.
       * @param newAttr The <code>Attr</code> node to add to the attribute list.
       * @return If the <code>newAttr</code> attribute replaces an existing
       *   attribute with the same local name and namespace URI, the replaced
       *   <code>Attr</code> node is returned, otherwise <code>null</code> is
       *   returned.
       * @exception org.w3c.dom.DOMException
       *   WRONG_DOCUMENT_ERR: Raised if <code>newAttr</code> was created from a
       *   different document than the one that created the element.
       *   <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
       *   <br>INUSE_ATTRIBUTE_ERR: Raised if <code>newAttr</code> is already an
       *   attribute of another <code>Element</code> object. The DOM user must
       *   explicitly clone <code>Attr</code> nodes to re-use them in other
       *   elements.
       *   <br>NOT_SUPPORTED_ERR: May be raised if the implementation does not
       *   support the feature <code>"XML"</code> and the language exposed
       *   through the Document does not support XML Namespaces (such as [<a href='http://www.w3.org/TR/1999/REC-html401-19991224/'>HTML 4.01</a>]).
       * @since DOM Level 2
       */
      public org.w3c.dom.Attr setAttributeNodeNS(org.w3c.dom.Attr newAttr)
                                     throws org.w3c.dom.DOMException;
  
      /**
       * Returns a <code>NodeList</code> of all the descendant
       * <code>Elements</code> with a given local name and namespace URI in
       * document order.
       * @param namespaceURI The namespace URI of the elements to match on. The
       *   special value "*" matches all namespaces.
       * @param localName The local name of the elements to match on. The
       *   special value "*" matches all local names.
       * @return A new <code>NodeList</code> object containing all the matched
       *   <code>Elements</code>.
       * @exception org.w3c.dom.DOMException
       *   NOT_SUPPORTED_ERR: May be raised if the implementation does not
       *   support the feature <code>"XML"</code> and the language exposed
       *   through the Document does not support XML Namespaces (such as [<a href='http://www.w3.org/TR/1999/REC-html401-19991224/'>HTML 4.01</a>]).
       * @since DOM Level 2
       */
      public NodeList getElementsByTagNameNS(String namespaceURI,
                                             String localName)
                                             throws org.w3c.dom.DOMException;
  
      /**
       * Returns <code>true</code> when an attribute with a given name is
       * specified on this element or has a default value, <code>false</code>
       * otherwise.
       * @param name The name of the attribute to look for.
       * @return <code>true</code> if an attribute with the given name is
       *   specified on this element or has a default value, <code>false</code>
       *    otherwise.
       * @since DOM Level 2
       */
      public boolean hasAttribute(String name);
  
      /**
       * Returns <code>true</code> when an attribute with a given local name and
       * namespace URI is specified on this element or has a default value,
       * <code>false</code> otherwise.
       * <br>Per [<a href='http://www.w3.org/TR/1999/REC-xml-names-19990114/'>XML Namespaces</a>]
       * , applications must use the value <code>null</code> as the
       * <code>namespaceURI</code> parameter for methods if they wish to have
       * no namespace.
       * @param namespaceURI The namespace URI of the attribute to look for.
       * @param localName The local name of the attribute to look for.
       * @return <code>true</code> if an attribute with the given local name
       *   and namespace URI is specified or has a default value on this
       *   element, <code>false</code> otherwise.
       * @exception org.w3c.dom.DOMException
       *   NOT_SUPPORTED_ERR: May be raised if the implementation does not
       *   support the feature <code>"XML"</code> and the language exposed
       *   through the Document does not support XML Namespaces (such as [<a href='http://www.w3.org/TR/1999/REC-html401-19991224/'>HTML 4.01</a>]).
       * @since DOM Level 2
       */
      public boolean hasAttributeNS(String namespaceURI,
                                    String localName)
                                    throws org.w3c.dom.DOMException;
  
      /**
       *  The type information associated with this element.
       * @since DOM Level 3
       */
      public TypeInfo getSchemaTypeInfo();
  
      /**
       *  If the parameter <code>isId</code> is <code>true</code>, this method
       * declares the specified attribute to be a user-determined ID attribute
       * . This affects the value of <code>Attr.isId</code> and the behavior
       * of <code>Document.getElementById</code>, but does not change any
       * schema that may be in use, in particular this does not affect the
       * <code>Attr.schemaTypeInfo</code> of the specified <code>Attr</code>
       * node. Use the value <code>false</code> for the parameter
       * <code>isId</code> to undeclare an attribute for being a
       * user-determined ID attribute.
       * <br> To specify an attribute by local name and namespace URI, use the
       * <code>setIdAttributeNS</code> method.
       * @param name The name of the attribute.
       * @param isId Whether the attribute is a of type ID.
       * @exception org.w3c.dom.DOMException
       *   NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
       *   <br>NOT_FOUND_ERR: Raised if the specified node is not an attribute
       *   of this element.
       * @since DOM Level 3
       */
      public void setIdAttribute(String name,
                                 boolean isId)
                                 throws org.w3c.dom.DOMException;
  
      /**
       *  If the parameter <code>isId</code> is <code>true</code>, this method
       * declares the specified attribute to be a user-determined ID attribute
       * . This affects the value of <code>Attr.isId</code> and the behavior
       * of <code>Document.getElementById</code>, but does not change any
       * schema that may be in use, in particular this does not affect the
       * <code>Attr.schemaTypeInfo</code> of the specified <code>Attr</code>
       * node. Use the value <code>false</code> for the parameter
       * <code>isId</code> to undeclare an attribute for being a
       * user-determined ID attribute.
       * @param namespaceURI The namespace URI of the attribute.
       * @param localName The local name of the attribute.
       * @param isId Whether the attribute is a of type ID.
       * @exception org.w3c.dom.DOMException
       *   NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
       *   <br>NOT_FOUND_ERR: Raised if the specified node is not an attribute
       *   of this element.
       * @since DOM Level 3
       */
      public void setIdAttributeNS(String namespaceURI,
                                   String localName,
                                   boolean isId)
                                   throws org.w3c.dom.DOMException;
  
      /**
       *  If the parameter <code>isId</code> is <code>true</code>, this method
       * declares the specified attribute to be a user-determined ID attribute
       * . This affects the value of <code>Attr.isId</code> and the behavior
       * of <code>Document.getElementById</code>, but does not change any
       * schema that may be in use, in particular this does not affect the
       * <code>Attr.schemaTypeInfo</code> of the specified <code>Attr</code>
       * node. Use the value <code>false</code> for the parameter
       * <code>isId</code> to undeclare an attribute for being a
       * user-determined ID attribute.
       * @param idAttr The attribute node.
       * @param isId Whether the attribute is a of type ID.
       * @exception org.w3c.dom.DOMException
       *   NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
       *   <br>NOT_FOUND_ERR: Raised if the specified node is not an attribute
       *   of this element.
       * @since DOM Level 3
       */
      public void setIdAttributeNode(Attr idAttr,
                                     boolean isId)
                                     throws DOMException;
  
  }
  