• May 24, 2003

  DAML XSLT

  Michael F. Aube and Susan Post from Booz Allen & Hamilton had written a DAML/XSLT Adapter that allows conversion of an arbitrary DAML document into other formats utilizing an XSLT stylesheet. You can read more about it here. It's rather 'academic'-looking at the moment, but it is a promising project. For one thing, it'd allow conversion of DAML documents into a more simplified XML format which can then be parsed in restricted Java environments like PDAs.

  I've been looking for a DAML parser that works on JDK 1.1.8 (which is the JVM version supported on most PDAs), but prolonged searches turned up naught. This seems to be a possible solution to my problems because the heavy-weight peer where the PDA gets the DAML document (wirelessly) from can instead convert it into a simplified XML format suitable for parsing on the PDA. Why parsing? It's to allow editing of DAML ontologies via a GUI. When transferring back, the conversion can be done the other way around, with total transparency to users at both ends. I'll be looking into this and will update on my experiences working with this.

• May 24, 2003

  Humble origins

  Ah this is me finally getting into the blog scene! I'm an aspiring J2ME developer, and an even more aspiring J2EE developer. That aside, I'm your usual geek programmer type who spends more time in front of computers than I should, both in university, at home and at work. This will be a good place to put down my thoughts and discoveries in the world of Open Source, programming, web development, as well as more mundane stuff (like how life sucks, extreme lack of girls in my life, Liverpool FC, and music).

  Name: Cheah Chu Yeow
  Pseudonym: redemption
  Occupation: Student at local university
  Location: in front of a computer, Singapore
  Skillset: Java, C, Python, PHP, Perl, SQL
  Interests: J2EE, J2ME, XUL, UNIX, operating systems, distributed systems, Dragonlance, Football

  In true geek fashion, I think this situation fairly deserves a 'Hello, World' code listing of some sort.
  
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

  public class HelloWorld
  extends MIDlet
  implements CommandListener {
  private Command exitCmd;
  private TextBox tb;

  public HelloWorld() {
  exitCmd = new Command("Exit", Command.EXIT, 1);
  tb = new TextBox( "Hello World", "Hello, World!", 15, 0 );
  tb.addCommand(exitCmd);
  tb.setCommandListener(this);
  }

  protected void startApp() {
  Display.getDisplay(this).setCurrent(tb);
  }

  protected void pauseApp() { }
  protected void destroyApp(boolean u) { }

  public void commandAction(Command c, Displayable d) {
if ( c == exitCmd ) {
destroyApp(false);
notifyDestroyed();
}
}
}


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