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. 
// Attributes2.java - extended Attributes
// http://www.saxproject.org
// Public Domain: no warranty.
// $Id: Attributes2.java 226184 2005-04-08 10:53:24Z neeraj $

package org.xml.sax.ext;

import org.xml.sax.Attributes;



SAX2 extension to augment the per-attribute information provided though Attributes. If an implementation supports this extension, the attributes provided in 
ContentHandler.startElement() will implement this interface, and the http://xml.org/sax/features/use-attributes2
feature flag will have the value true.


This module, both source code and documentation, is in the
Public Domain, and comes with NO WARRANTY.



 XMLReader implementations are not required to support this
information, and it is not part of core-only SAX2 distributions.


Note that if an attribute was defaulted (!isSpecified())
it will of necessity also have been declared (isDeclared())
in the DTD.
Similarly if an attribute's type is anything except CDATA, then it
must have been declared.



Author:David Brownell
Since:SAX 2.0 (extensions 1.1 alpha)
Version:TBS
/**
 * SAX2 extension to augment the per-attribute information
 * provided though {@link Attributes}.
 * If an implementation supports this extension, the attributes
 * provided in {@link org.xml.sax.ContentHandler#startElement
 * ContentHandler.startElement() } will implement this interface,
 * and the <em>http://xml.org/sax/features/use-attributes2</em>
 * feature flag will have the value <em>true</em>.
 *
 * <blockquote>
 * <em>This module, both source code and documentation, is in the
 * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>
 * </blockquote>
 *
 * <p> XMLReader implementations are not required to support this
 * information, and it is not part of core-only SAX2 distributions.</p>
 *
 * <p>Note that if an attribute was defaulted (<em>!isSpecified()</em>)
 * it will of necessity also have been declared (<em>isDeclared()</em>)
 * in the DTD.
 * Similarly if an attribute's type is anything except CDATA, then it
 * must have been declared.
 * </p>
 *
 * @since SAX 2.0 (extensions 1.1 alpha)
 * @author David Brownell
 * @version TBS
 */
public interface Attributes2 extends Attributes
{
    
Returns false unless the attribute was declared in the DTD.
This helps distinguish two kinds of attributes that SAX reports
as CDATA:  ones that were declared (and hence are usually valid),
and those that were not (and which are never valid).

Params:
  • index – The attribute index (zero-based).
Throws:
Returns:true if the attribute was declared in the DTD,
	false otherwise.
/**
     * Returns false unless the attribute was declared in the DTD.
     * This helps distinguish two kinds of attributes that SAX reports
     * as CDATA:  ones that were declared (and hence are usually valid),
     * and those that were not (and which are never valid).
     *
     * @param index The attribute index (zero-based).
     * @return true if the attribute was declared in the DTD,
     *		false otherwise.
     * @exception java.lang.ArrayIndexOutOfBoundsException When the
     *            supplied index does not identify an attribute.
     */
    public boolean isDeclared (int index);

    
Returns false unless the attribute was declared in the DTD.
This helps distinguish two kinds of attributes that SAX reports
as CDATA:  ones that were declared (and hence are usually valid),
and those that were not (and which are never valid).

Params:
  • qName – The XML qualified (prefixed) name.
Throws:
Returns:true if the attribute was declared in the DTD,
	false otherwise.
/**
     * Returns false unless the attribute was declared in the DTD.
     * This helps distinguish two kinds of attributes that SAX reports
     * as CDATA:  ones that were declared (and hence are usually valid),
     * and those that were not (and which are never valid).
     *
     * @param qName The XML qualified (prefixed) name.
     * @return true if the attribute was declared in the DTD,
     *		false otherwise.
     * @exception java.lang.IllegalArgumentException When the
     *            supplied name does not identify an attribute.
     */
    public boolean isDeclared (String qName);

    
Returns false unless the attribute was declared in the DTD.
This helps distinguish two kinds of attributes that SAX reports
as CDATA:  ones that were declared (and hence are usually valid),
and those that were not (and which are never valid).

Remember that since DTDs do not "understand" namespaces, the
namespace URI associated with an attribute may not have come from
the DTD.  The declaration will have applied to the attribute's
qName.

Params:
  • uri – The Namespace URI, or the empty string if
       the name has no Namespace URI.
  • localName – The attribute's local name.
Throws:
Returns:true if the attribute was declared in the DTD,
	false otherwise.
/**
     * Returns false unless the attribute was declared in the DTD.
     * This helps distinguish two kinds of attributes that SAX reports
     * as CDATA:  ones that were declared (and hence are usually valid),
     * and those that were not (and which are never valid).
     *
     * <p>Remember that since DTDs do not "understand" namespaces, the
     * namespace URI associated with an attribute may not have come from
     * the DTD.  The declaration will have applied to the attribute's
     * <em>qName</em>.
     *
     * @param uri The Namespace URI, or the empty string if
     *        the name has no Namespace URI.
     * @param localName The attribute's local name.
     * @return true if the attribute was declared in the DTD,
     *		false otherwise.
     * @exception java.lang.IllegalArgumentException When the
     *            supplied names do not identify an attribute.
     */
    public boolean isDeclared (String uri, String localName);

    
Returns true unless the attribute value was provided
by DTD defaulting.

Params:
  • index – The attribute index (zero-based).
Throws:
Returns:true if the value was found in the XML text,
	false if the value was provided by DTD defaulting.
/**
     * Returns true unless the attribute value was provided
     * by DTD defaulting.
     *
     * @param index The attribute index (zero-based).
     * @return true if the value was found in the XML text,
     *		false if the value was provided by DTD defaulting.
     * @exception java.lang.ArrayIndexOutOfBoundsException When the
     *            supplied index does not identify an attribute.
     */
    public boolean isSpecified (int index);

    
Returns true unless the attribute value was provided
by DTD defaulting.

Remember that since DTDs do not "understand" namespaces, the
namespace URI associated with an attribute may not have come from
the DTD.  The declaration will have applied to the attribute's
qName.

Params:
  • uri – The Namespace URI, or the empty string if
       the name has no Namespace URI.
  • localName – The attribute's local name.
Throws:
Returns:true if the value was found in the XML text,
	false if the value was provided by DTD defaulting.
/**
     * Returns true unless the attribute value was provided
     * by DTD defaulting.
     *
     * <p>Remember that since DTDs do not "understand" namespaces, the
     * namespace URI associated with an attribute may not have come from
     * the DTD.  The declaration will have applied to the attribute's
     * <em>qName</em>.
     *
     * @param uri The Namespace URI, or the empty string if
     *        the name has no Namespace URI.
     * @param localName The attribute's local name.
     * @return true if the value was found in the XML text,
     *		false if the value was provided by DTD defaulting.
     * @exception java.lang.IllegalArgumentException When the
     *            supplied names do not identify an attribute.
     */
    public boolean isSpecified (String uri, String localName);

    
Returns true unless the attribute value was provided
by DTD defaulting.

Params:
  • qName – The XML qualified (prefixed) name.
Throws:
Returns:true if the value was found in the XML text,
	false if the value was provided by DTD defaulting.
/**
     * Returns true unless the attribute value was provided
     * by DTD defaulting.
     *
     * @param qName The XML qualified (prefixed) name.
     * @return true if the value was found in the XML text,
     *		false if the value was provided by DTD defaulting.
     * @exception java.lang.IllegalArgumentException When the
     *            supplied name does not identify an attribute.
     */
    public boolean isSpecified (String qName);
}