Preload node

I wonder what is the concept of "preload node"
in case of "--default--" target.

File lib/ConfigTree/Node.pm, method parseLines():

    my($node);
    if ($token eq 'target') {
        if ($name eq '--default--') {
            if ($self->Done()) {
                if (! $self->Preload()) {
                    $self->Debug("Making a preload node.");
                    $self->Preload(new ConfigTree::Node);
                }
                $node = $self->Preload();
                $self->Debug("Using a preload node.");
            } else {
                $node = $self;
            }
        } else {

I can see that if the parser finds a second (third etc.)
"target --default--" stanza at the same level it passes the content
to the child node directly instead of normal inheritance mechanism.
But why?
Why --default-- targets are not simply merged?
(I want to mix manually maintained and machine generated config files
both containing "target --default--".)

Could somebody explain what was JRA's idea? :-)

Gabor
-- 
Spider-Pig, Spider-Pig
Does whatever a Spider-Pig does.
Can he swing from a web?
No, he can't, he's a pig.
Look out! He is a Spider-Pig.

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