http://xml.apache.org/commons/components/external/: xml-commons provides an Apache-hosted set of DOM, SAX, and JAXP interfaces for use in other xml-based projects. Our hope is that we can standardize on both a common version and packaging scheme for these critical XML standards interfaces to make the lives of both our developers and users easier. The External Components portion of xml-commons contains interfaces that are defined by external standards organizations. For DOM, that's the W3C; for SAX it's David Megginson and sax.sourceforge.net; for JAXP it's Sun. 
/*
 * 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 Element interface represents an element in an HTML or XML 
document. Elements may have attributes associated with them; since the 
Element interface inherits from Node, the 
generic Node interface attribute attributes may 
be used to retrieve the set of all attributes for an element. There are 
methods on the Element interface to retrieve either an 
Attr object by name or an attribute value by name. In XML, 
where an attribute value may contain entity references, an 
Attr 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.

Note: In DOM Level 2, the method normalize is 
inherited from the Node interface where it was moved.

See also the Document Object Model (DOM) Level 3 Core Specification.

/**
 * 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 Node.localName is different 
from null, this attribute is a qualified name. For 
example, in: 

 <elementExample id="demo"> ... 
</elementExample> , 

 tagName has the value 
"elementExample". Note that this is case-preserving in 
XML, as are all of the operations of the DOM. The HTML DOM returns 
the tagName of an HTML element in the canonical 
uppercase form, regardless of the case in the source HTML document.

/**
     * 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.

Params:
  • name – The name of the attribute to retrieve.
Returns:The Attr value as a string, or the empty string 
  if that attribute does not have a specified or default value.
/**
     * 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 Attr node plus any 
Text and EntityReference nodes, build the 
appropriate subtree, and use setAttributeNode to assign 
it as the value of an attribute.

To set an attribute with a qualified name and namespace URI, use 
the setAttributeNS method.

Params:
  • name – The name of the attribute to create or alter.
  • value – Value to set in string form.
Throws:
  • DOMException – 
  INVALID_CHARACTER_ERR: Raised if the specified name is not an XML 
  name according to the XML version in use specified in the 
  Document.xmlVersion attribute.
  
    NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
/**
     * 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 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 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 Document.normalizeDocument() to guarantee this 
information is up-to-date.

If no attribute with this name is found, this method has no effect.

To remove an attribute by local name and namespace URI, use the 
removeAttributeNS method.

Params:
  • name – The name of the attribute to remove.
Throws:
  • DOMException – 
  NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
/**
     * 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 DOMException
     *   NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
     */
    public void removeAttribute(String name)
                                throws DOMException;

    
Retrieves an attribute node by name.

To retrieve an attribute node by qualified name and namespace URI, 
use the getAttributeNodeNS method.

Params:
  • name – The name (nodeName) of the attribute to 
  retrieve.
Returns:The Attr node with the specified name (
  nodeName) or null if there is no such 
  attribute.
/**
     * 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 Attr getAttributeNode(String name);

    
Adds a new attribute node. If an attribute with that name (
nodeName) is already present in the element, it is 
replaced by the new one. Replacing an attribute node by itself has no 
effect.

To add a new attribute node with a qualified name and namespace 
URI, use the setAttributeNodeNS method.

Params:
  • newAttr – The Attr node to add to the attribute list.
Throws:
  • DOMException – 
  WRONG_DOCUMENT_ERR: Raised if newAttr was created from a 
  different document than the one that created the element.
  
    NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
  
    INUSE_ATTRIBUTE_ERR: Raised if newAttr is already an 
  attribute of another Element object. The DOM user must 
  explicitly clone Attr nodes to re-use them in other 
  elements.
Returns:If the newAttr attribute replaces an existing 
  attribute, the replaced Attr node is returned, 
  otherwise null is returned.
/**
     * 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 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 Attr setAttributeNode(Attr newAttr)
                                 throws DOMException;

    
Removes the specified attribute node. If a default value for the 
removed Attr 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 
Document.normalizeDocument() to guarantee this 
information is up-to-date.

Params:
  • oldAttr – The Attr node to remove from the attribute 
  list.
Throws:
  • DOMException – 
  NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
  
    NOT_FOUND_ERR: Raised if oldAttr is not an attribute 
  of the element.
Returns:The Attr node that was removed.
/**
     * 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 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 Attr removeAttributeNode(Attr oldAttr)
                                    throws DOMException;

    
Returns a NodeList of all descendant Elements 
with a given tag name, in document order.

Params:
  • name – The name of the tag to match on. The special value "*" 
  matches all tags.
Returns:A list of matching Element nodes.
/**
     * 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 NodeList getElementsByTagName(String name);

    
Retrieves an attribute value by local name and namespace URI.

Per [XML Namespaces]
, applications must use the value null as the 
namespaceURI parameter for methods if they wish to have 
no namespace.

Params:
  • namespaceURI – The namespace URI of the attribute to retrieve.
  • localName – The local name of the attribute to retrieve.
Throws:
  • DOMException – 
  NOT_SUPPORTED_ERR: May be raised if the implementation does not 
  support the feature "XML" and the language exposed 
  through the Document does not support XML Namespaces (such as [HTML 4.01]).
Returns:The Attr value as a string, or the empty string 
  if that attribute does not have a specified or default value.
Since:DOM Level 2
/**
     * 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 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 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 qualifiedName, and 
its value is changed to be 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 Attr node plus any Text and 
EntityReference nodes, build the appropriate subtree, 
and use setAttributeNodeNS or 
setAttributeNode to assign it as the value of an 
attribute.

Per [XML Namespaces]
, applications must use the value null as the 
namespaceURI parameter for methods if they wish to have 
no namespace.

Params:
  • namespaceURI – The namespace URI of the attribute to create or 
  alter.
  • qualifiedName – The qualified name of the attribute to create or 
  alter.
  • value – The value to set in string form.
Throws:
  • 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 
  Document.xmlVersion attribute.
  
    NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
  
    NAMESPACE_ERR: Raised if the qualifiedName is 
  malformed per the Namespaces in XML specification, if the 
  qualifiedName has a prefix and the 
  namespaceURI is null, if the 
  qualifiedName has a prefix that is "xml" and the 
  namespaceURI is different from "
  http://www.w3.org/XML/1998/namespace", if the qualifiedName or its prefix is "xmlns" and the 
  namespaceURI is different from "http://www.w3.org/2000/xmlns/", or if the namespaceURI is "http://www.w3.org/2000/xmlns/" and neither the qualifiedName nor its prefix is "xmlns".
  
    NOT_SUPPORTED_ERR: May be raised if the implementation does not 
  support the feature "XML" and the language exposed 
  through the Document does not support XML Namespaces (such as [HTML 4.01]).
Since:DOM Level 2
/**
     * 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 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 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 
Document.normalizeDocument() to guarantee this 
information is up-to-date.

If no attribute with this local name and namespace URI is found, 
this method has no effect.

Per [XML Namespaces]
, applications must use the value null as the 
namespaceURI parameter for methods if they wish to have 
no namespace.

Params:
  • namespaceURI – The namespace URI of the attribute to remove.
  • localName – The local name of the attribute to remove.
Throws:
  • DOMException – 
  NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
  
    NOT_SUPPORTED_ERR: May be raised if the implementation does not 
  support the feature "XML" and the language exposed 
  through the Document does not support XML Namespaces (such as [HTML 4.01]).
Since:DOM Level 2
/**
     * 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 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 DOMException;

    
Retrieves an Attr node by local name and namespace URI.

Per [XML Namespaces]
, applications must use the value null as the 
namespaceURI parameter for methods if they wish to have 
no namespace.

Params:
  • namespaceURI – The namespace URI of the attribute to retrieve.
  • localName – The local name of the attribute to retrieve.
Throws:
  • DOMException – 
  NOT_SUPPORTED_ERR: May be raised if the implementation does not 
  support the feature "XML" and the language exposed 
  through the Document does not support XML Namespaces (such as [HTML 4.01]).
Returns:The Attr node with the specified attribute local 
  name and namespace URI or null if there is no such 
  attribute.
Since:DOM Level 2
/**
     * 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 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 Attr getAttributeNodeNS(String namespaceURI, 
                                   String localName)
                                   throws 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.

Per [XML Namespaces]
, applications must use the value null as the 
namespaceURI parameter for methods if they wish to have 
no namespace.

Params:
  • newAttr – The Attr node to add to the attribute list.
Throws:
  • DOMException – 
  WRONG_DOCUMENT_ERR: Raised if newAttr was created from a 
  different document than the one that created the element.
  
    NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
  
    INUSE_ATTRIBUTE_ERR: Raised if newAttr is already an 
  attribute of another Element object. The DOM user must 
  explicitly clone Attr nodes to re-use them in other 
  elements.
  
    NOT_SUPPORTED_ERR: May be raised if the implementation does not 
  support the feature "XML" and the language exposed 
  through the Document does not support XML Namespaces (such as [HTML 4.01]).
Returns:If the newAttr attribute replaces an existing 
  attribute with the same local name and namespace URI, the replaced 
  Attr node is returned, otherwise null is 
  returned.
Since:DOM Level 2
/**
     * 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 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 Attr setAttributeNodeNS(Attr newAttr)
                                   throws DOMException;

    
Returns a NodeList of all the descendant 
Elements with a given local name and namespace URI in 
document order.

Params:
  • namespaceURI – The namespace URI of the elements to match on. The 
  special value "*" matches all namespaces.
  • localName – The local name of the elements to match on. The 
  special value "*" matches all local names.
Throws:
  • DOMException – 
  NOT_SUPPORTED_ERR: May be raised if the implementation does not 
  support the feature "XML" and the language exposed 
  through the Document does not support XML Namespaces (such as [HTML 4.01]).
Returns:A new NodeList object containing all the matched 
  Elements.
Since:DOM Level 2
/**
     * 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 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 DOMException;

    
Returns true when an attribute with a given name is 
specified on this element or has a default value, false 
otherwise.

Params:
  • name – The name of the attribute to look for.
Returns:true if an attribute with the given name is 
  specified on this element or has a default value, false
   otherwise.
Since:DOM Level 2
/**
     * 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 true when an attribute with a given local name and 
namespace URI is specified on this element or has a default value, 
false otherwise.

Per [XML Namespaces]
, applications must use the value null as the 
namespaceURI parameter for methods if they wish to have 
no namespace.

Params:
  • namespaceURI – The namespace URI of the attribute to look for.
  • localName – The local name of the attribute to look for.
Throws:
  • DOMException – 
  NOT_SUPPORTED_ERR: May be raised if the implementation does not 
  support the feature "XML" and the language exposed 
  through the Document does not support XML Namespaces (such as [HTML 4.01]).
Returns:true if an attribute with the given local name 
  and namespace URI is specified or has a default value on this 
  element, false otherwise.
Since:DOM Level 2
/**
     * 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 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 DOMException;

    
 The type information associated with this element. 

Since:DOM Level 3
/**
     *  The type information associated with this element. 
     * @since DOM Level 3
     */
    public TypeInfo getSchemaTypeInfo();

    
 If the parameter isId is true, this method 
declares the specified attribute to be a user-determined ID attribute
. This affects the value of Attr.isId and the behavior 
of Document.getElementById, but does not change any 
schema that may be in use, in particular this does not affect the 
Attr.schemaTypeInfo of the specified Attr 
node. Use the value false for the parameter 
isId to undeclare an attribute for being a 
user-determined ID attribute. 

 To specify an attribute by local name and namespace URI, use the 
setIdAttributeNS method. 

Params:
  • name – The name of the attribute.
  • isId – Whether the attribute is a of type ID.
Throws:
  • DOMException – 
  NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
  
    NOT_FOUND_ERR: Raised if the specified node is not an attribute 
  of this element.
Since:DOM Level 3
/**
     *  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 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 DOMException;

    
 If the parameter isId is true, this method 
declares the specified attribute to be a user-determined ID attribute
. This affects the value of Attr.isId and the behavior 
of Document.getElementById, but does not change any 
schema that may be in use, in particular this does not affect the 
Attr.schemaTypeInfo of the specified Attr 
node. Use the value false for the parameter 
isId to undeclare an attribute for being a 
user-determined ID attribute. 

Params:
  • namespaceURI – The namespace URI of the attribute.
  • localName – The local name of the attribute.
  • isId – Whether the attribute is a of type ID.
Throws:
  • DOMException – 
  NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
  
    NOT_FOUND_ERR: Raised if the specified node is not an attribute 
  of this element.
Since:DOM Level 3
/**
     *  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 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 DOMException;

    
 If the parameter isId is true, this method 
declares the specified attribute to be a user-determined ID attribute
. This affects the value of Attr.isId and the behavior 
of Document.getElementById, but does not change any 
schema that may be in use, in particular this does not affect the 
Attr.schemaTypeInfo of the specified Attr 
node. Use the value false for the parameter 
isId to undeclare an attribute for being a 
user-determined ID attribute. 

Params:
  • idAttr – The attribute node.
  • isId – Whether the attribute is a of type ID.
Throws:
  • DOMException – 
  NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
  
    NOT_FOUND_ERR: Raised if the specified node is not an attribute 
  of this element.
Since:DOM Level 3
/**
     *  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 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;

}