| <!-- $Id$ --> |
| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" |
| "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
| |
| <html xmlns="http://www.w3.org/1999/xhtml"> |
| <head> |
| <title>SAX2 is Free!</title> |
| </head> |
| |
| <body> |
| <p>This package, SAX2-ext, is an extension package for SAX2. It is |
| designed both to allow SAX drivers to pass certain types of none-core |
| information to applications and to serve as a simple model for other |
| SAX2 extension packages.</p> |
| |
| <p><strong>NOTE:</strong> this package alone does add any |
| functionality; it simply provides optional interfaces for SAX2 drivers |
| to use. You must find a SAX2 driver that supports these interfaces if |
| you actually want to have access to lexical and declaration |
| information.</p> |
| |
| <p>The SAX2-ext package currently contains two extension handlers for |
| SAX2:</p> |
| |
| <ol> |
| |
| <li><a href="javadoc/org/xml/sax/ext/LexicalHandler.html" |
| >LexicalHandler</a>, which reports comments, the DOCTYPE declaration, |
| CDATA sections, and (some) entity boundaries; and</li> |
| |
| <li><a href="javadoc/org/xml/sax/ext/DeclHandler.html" |
| >DeclHandler</a>, which reports element, attribute, and entity |
| declarations.</li> |
| |
| </ol> |
| |
| <p>This package is independent of the SAX2 core, and that independence |
| has several consequences:</p> |
| |
| <ul> |
| |
| <li>SAX2 drivers are <em>not</em> required to support these handlers, |
| and you cannot assume that the classes will be present in every SAX2 |
| installation.</li> |
| |
| <li>This package may be updated independently of SAX2 (i.e. new |
| handlers may be added without updating SAX2 itself).</li> |
| |
| <li>The handlers are not supported explicitly by the SAX2 |
| <var>XMLFilter</var> interface (i.e. events are not passed on by |
| default); you can subclass XMLFilter if you need such behaviour.</li> |
| |
| <li>The handlers need to be registered differently than regular SAX2 |
| handlers.</li> |
| |
| </ul> |
| |
| <p>To set a LexicalHandler, for example, you need to do something like |
| this:</p> |
| |
| <blockquote><pre xml:space="preserve"> |
| LexicalHandler lh = new MyLexicalHandler(); |
| try { |
| xmlReader.setProperty("http://xml.org/sax/properties/lexical-handler", |
| lh); |
| } catch (SAXException e) { |
| System.out.println("LexicalHandler not supported by this SAX2 driver."); |
| } |
| </pre></blockquote> |
| |
| |
| <div> |
| <h2>SAX2-ext Properties</h2> |
| |
| <p>Here is a full definition of the two new SAX2 properties introduced |
| in this version of SAX2-ext:</p> |
| |
| <dl> |
| |
| <dt><code>http://xml.org/sax/properties/lexical-handler</code></dt> |
| <dd><strong>data type:</strong> |
| <code>org.xml.sax.ext.LexicalHandler</code></dd> |
| <dd><strong>description:</strong> An optional extension handler for |
| lexical events like comments.</dd> |
| <dd><strong>access:</strong> read/write</dd> |
| |
| <dt><code>http://xml.org/sax/properties/declaration-handler</code></dt> |
| <dd><strong>data type:</strong> |
| <code>org.xml.sax.ext.DeclHandler</code></dd> |
| <dd><strong>description:</strong> An optional extension handler for |
| DTD-related events other than notations and unparsed entities.</dd> |
| <dd><strong>access:</strong> read/write</dd> |
| |
| </dl> |
| |
| <h1>SAX2 is Free!</h1> |
| |
| <p>I hereby abandon any property rights to SAX 2.0 (the Simple API for |
| XML), and release all of the SAX 2.0 source code, compiled code, and |
| documentation contained in this distribution into the Public Domain. |
| SAX comes with NO WARRANTY or guarantee of fitness for any |
| purpose.</p> |
| |
| <p>David Megginson, david@megginson.com</p> |
| <p>2000-05-05</p> |
| |
| </body> |
| </html> |
