<project default="invalid">
  <target name="invalid">
    <fail>Don't call this file directly.</fail>
  </target>

  <taskdef resource="net/sf/antcontrib/antlib.xml" classpath="${antcontrib.jar}"/>

  <target name="consistency">
    <osfamily property="foo"/>
    <condition property="consistent">
      <os family="${foo}"/>
    </condition>
  </target>

  <target name="missingProperty">
    <osfamily/>
  </target>
</project>
