<?xml version="1.0"?>
<param xml:id='ex_v'>
<time_resolution>30</time_resolution>
<get>
<amdaParam name='velocity'/>
<amdaParam name='efield'/>
</get>
<process description="efield(0)*velocity(0)">$efield[0]*$velocity[0]</process>
<output/>
</param>