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 DOMImplementation interface provides a number of methods 
for performing operations that are independent of any particular instance 
of the document object model.

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

/**
 * The <code>DOMImplementation</code> interface provides a number of methods 
 * for performing operations that are independent of any particular instance 
 * of the document object model.
 * <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 DOMImplementation {
    
Test if the DOM implementation implements a specific feature and 
version, as specified in .

Params:
  • feature –  The name of the feature to test.
  • version –  This is the version number of the feature to test.
Returns:true if the feature is implemented in the 
  specified version, false otherwise.
/**
     * Test if the DOM implementation implements a specific feature and 
     * version, 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 <code>true</code> if the feature is implemented in the 
     *   specified version, <code>false</code> otherwise.
     */
    public boolean hasFeature(String feature, 
                              String version);

    
Creates an empty DocumentType node. Entity declarations 
and notations are not made available. Entity reference expansions and 
default attribute additions do not occur..

Params:
  • qualifiedName – The qualified name of the document type to be 
  created.
  • publicId – The external subset public identifier.
  • systemId – The external subset system identifier.
Throws:
  • DOMException – 
  INVALID_CHARACTER_ERR: Raised if the specified qualified name is not 
  an XML name according to [XML 1.0].
  
    NAMESPACE_ERR: Raised if the qualifiedName is 
  malformed.
  
    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 DocumentType node with 
  Node.ownerDocument set to null.
Since:DOM Level 2
/**
     * Creates an empty <code>DocumentType</code> node. Entity declarations 
     * and notations are not made available. Entity reference expansions and 
     * default attribute additions do not occur..
     * @param qualifiedName The qualified name of the document type to be 
     *   created.
     * @param publicId The external subset public identifier.
     * @param systemId The external subset system identifier.
     * @return A new <code>DocumentType</code> node with 
     *   <code>Node.ownerDocument</code> set to <code>null</code>.
     * @exception DOMException
     *   INVALID_CHARACTER_ERR: Raised if the specified qualified name is not 
     *   an XML name according to [<a href='http://www.w3.org/TR/2004/REC-xml-20040204'>XML 1.0</a>].
     *   <br>NAMESPACE_ERR: Raised if the <code>qualifiedName</code> is 
     *   malformed.
     *   <br>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 [<a href='http://www.w3.org/TR/1999/REC-html401-19991224/'>HTML 4.01</a>]). 
     * @since DOM Level 2
     */
    public DocumentType createDocumentType(String qualifiedName, 
                                           String publicId, 
                                           String systemId)
                                           throws DOMException;

    
Creates a DOM Document object of the specified type with its document 
element.

Note that based on the DocumentType given to create 
the document, the implementation may instantiate specialized 
Document objects that support additional features than 
the "Core", such as "HTML" [DOM Level 2 HTML]
. On the other hand, setting the DocumentType after the 
document was created makes this very unlikely to happen. 
Alternatively, specialized Document creation methods, 
such as createHTMLDocument [DOM Level 2 HTML]
, can be used to obtain specific types of Document 
objects.

Params:
  • namespaceURI – The namespace URI of the document element to 
  create or null.
  • qualifiedName – The qualified name of the document element to be 
  created or null.
  • doctype – The type of document to be created or null.
  When doctype is not null, its 
  Node.ownerDocument attribute is set to the document 
  being created.
Throws:
  • DOMException – 
  INVALID_CHARACTER_ERR: Raised if the specified qualified name is not 
  an XML name according to [XML 1.0].
  
    NAMESPACE_ERR: Raised if the qualifiedName is 
  malformed, if the qualifiedName has a prefix and the 
  namespaceURI is null, or if the 
  qualifiedName is null and the 
  namespaceURI is different from null, or 
  if the qualifiedName has a prefix that is "xml" and 
  the namespaceURI is different from "
  http://www.w3.org/XML/1998/namespace" [XML Namespaces]
  , or if the DOM implementation does not support the 
  "XML" feature but a non-null namespace URI was 
  provided, since namespaces were defined by XML.
  
    WRONG_DOCUMENT_ERR: Raised if doctype has already 
  been used with a different document or was created from a different 
  implementation.
  
    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 Document object with its document element. 
  If the NamespaceURI, qualifiedName, and 
  doctype are null, the returned 
  Document is empty with no document element.
Since:DOM Level 2
/**
     * Creates a DOM Document object of the specified type with its document 
     * element.
     * <br>Note that based on the <code>DocumentType</code> given to create 
     * the document, the implementation may instantiate specialized 
     * <code>Document</code> objects that support additional features than 
     * the "Core", such as "HTML" [<a href='http://www.w3.org/TR/2003/REC-DOM-Level-2-HTML-20030109'>DOM Level 2 HTML</a>]
     * . On the other hand, setting the <code>DocumentType</code> after the 
     * document was created makes this very unlikely to happen. 
     * Alternatively, specialized <code>Document</code> creation methods, 
     * such as <code>createHTMLDocument</code> [<a href='http://www.w3.org/TR/2003/REC-DOM-Level-2-HTML-20030109'>DOM Level 2 HTML</a>]
     * , can be used to obtain specific types of <code>Document</code> 
     * objects.
     * @param namespaceURI The namespace URI of the document element to 
     *   create or <code>null</code>.
     * @param qualifiedName The qualified name of the document element to be 
     *   created or <code>null</code>.
     * @param doctype The type of document to be created or <code>null</code>.
     *   When <code>doctype</code> is not <code>null</code>, its 
     *   <code>Node.ownerDocument</code> attribute is set to the document 
     *   being created.
     * @return A new <code>Document</code> object with its document element. 
     *   If the <code>NamespaceURI</code>, <code>qualifiedName</code>, and 
     *   <code>doctype</code> are <code>null</code>, the returned 
     *   <code>Document</code> is empty with no document element.
     * @exception DOMException
     *   INVALID_CHARACTER_ERR: Raised if the specified qualified name is not 
     *   an XML name according to [<a href='http://www.w3.org/TR/2004/REC-xml-20040204'>XML 1.0</a>].
     *   <br>NAMESPACE_ERR: Raised if the <code>qualifiedName</code> is 
     *   malformed, if the <code>qualifiedName</code> has a prefix and the 
     *   <code>namespaceURI</code> is <code>null</code>, or if the 
     *   <code>qualifiedName</code> is <code>null</code> and the 
     *   <code>namespaceURI</code> is different from <code>null</code>, or 
     *   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>" [<a href='http://www.w3.org/TR/1999/REC-xml-names-19990114/'>XML Namespaces</a>]
     *   , or if the DOM implementation does not support the 
     *   <code>"XML"</code> feature but a non-null namespace URI was 
     *   provided, since namespaces were defined by XML.
     *   <br>WRONG_DOCUMENT_ERR: Raised if <code>doctype</code> has already 
     *   been used with a different document or was created from a different 
     *   implementation.
     *   <br>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 [<a href='http://www.w3.org/TR/1999/REC-html401-19991224/'>HTML 4.01</a>]). 
     * @since DOM Level 2
     */
    public Document createDocument(String namespaceURI, 
                                   String qualifiedName, 
                                   DocumentType doctype)
                                   throws DOMException;

    
 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 
DOMImplementation interface. 

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

}