http://download.oracle.com/docs/cd/E12839_01/web.1111/e13715/using_wlst.htm#insertedID6
<taskdef name="wlst" classname="weblogic.ant.taskdefs.management.WLSTTask" classpathref="wl.ant.classpath"/>
<target name="create-domain-using-wlst">
<echo message=" Creating domain using WLST ... "/>
<wlst debug="true" failOnError="true" fileName="./wlst/createDomain.py">
</wlst>
</target>