package My::Big::Data::Structure;

our $BigDataStructure = ...

##</code><code>##

# make a local reference 
# to it to save typing
my $big_data_struct = $My::Big::Data::Structure::BigDataStructure;

##</code><code>##

PerlRequire "path/to/startup.pl"

##</code><code>##

use My::Big::Data::Structure;

$My::Big::Data::Structure::BigDataStructure = build_big_data_strucure();