The test checks the "datasource" attribute for the nested sections.
It should disable the relationships.

>>>>templates/test.tpl
<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<opt:root>
<opt:section name="sect">
{$sect.val1},{$sect.val2}
<opt:section name="sect2" datasource="$nest">
*{$sect2.foo}
</opt:section>
</opt:section>
</opt:root>

>>>>expected.txt
OUTPUT

>>>>result.txt
A,B
*X
*Y
C,D
*X
*Y

>>>>data.php
$view->sect = array(
	array('val1' => 'A', 'val2' => 'B'),
	array('val1' => 'C', 'val2' => 'D'),
);
$view->nest = array(
	array('foo' => 'X'),
	array('foo' => 'Y'),
);