xerces build.xml

I'm curious as to why the taskdef isn't defined as

 

  <taskdef name="xjavac" classname="org.apache.xerces.util.XJavac" classpath="${basedir}/tools/bin/xjavac.jar" />

instead of

 

<taskdef name="xjavac" classname="org.apache.xerces.util.XJavac"/>

 

without it, i get build failure, even tho i'm not using IBM JDK 1.4