what is fork?

[한성희]

i'm sunghee from Korea.   i have a few questions about Ant.   [samples] -------------------------------------------------------------- <project>   ~~~ ~~~    <!-- client -->     <target name="execute-client" depends="client">         <java classname="customer.Client" fork="yes">         </java>     </target>   </project> -------------------------------------------------------------- question: what do you mean by that fork Attribute?