The org.xml.sax.ext Package
The org.xml.sax.ext package holds extension interfaces that not all SAX2 parsers are expected to implement. These classes are in a sense optional but are provided by all widely used implementations and are required by Sun’s JAXP API.
Unlike the handlers in the SAX core, these handlers
do not have type-safe routines to bind them to
XMLReader objects. They are identified
using URIs, and bindings are accessed using the
getProperty() and
setProperty() methods.
The DeclHandler class
This is the primary way SAX2 exposes typing constraints from an XML Document Type Declaration. It also reports entity declarations.
For more information, refer to Section 4.3.1 in Chapter 4.
public interface DeclHandler
{
// data typing
public void attributeDecl(String element, String string
attribute,
String type, String mode, String defaultValue )
throws SAXException;
public void elementDecl(String name, String model) throws
SAXException;
// entity info
public void externalEntityDecl(String name,
String publicId, String systemId)
throws SAXException;
public void internalEntityDecl(String name, String value)
throws SAXException;
}The LexicalHandler Interface
Many parsers expose certain data even though it is, for most purposes, not part of the information that an XML document intends to convey to applications. This interface exposes some such data.
For more information, refer to Section 4.2 in Chapter 4.
public interface LexicalHandler { public void startDTD(String root, String ...