#!../jet-2.0
<jet name1="localname" filterblanklines="true" trimlines="true">
<set name="test1" value="5 + 5" />
<set name="test2" expr="expr($[test1])" />
$[test2]
<set name="numbers">0123456789</set>
<set name="lefty" expr="left($[numbers],5)" />
$[lefty]
</jet>