not at all - it's that what allows the simplest structure for nesting of outline elements.
An <outline> is an XML element, possibly containing one or more attributes, and containing any number of <outline> sub-elements.
<?xml version="1.0" encoding="UTF-8"?>
<node>
<node> <![CDATA[ Hello I am text ]]> <node> ... </node> <node> ... </node> </node>
not at all - it's that what allows the simplest structure for nesting of outline elements.
An <outline> is an XML element, possibly containing one or more attributes, and containing any number of <outline> sub-elements.