sub generate_item_list {
	my @item_list;
	push @item_list, [
		"TREE:total_weight",     # data_access_key
		'$%6.2f$',               # format
		2,                       # order
		'$tree.total\\_weight$', # label in LaTeX
		'(ORDER g)'              # unit
	];
	push @item_list, [
		"TREE:density",
		'$%6.2f$',
		-4,
		'$tree.wood\\_density$',
		'(ORDER g mm$^{-3}$)'
	];
	push @item_list, [
		"TREE:area_ratio",
		'$%6.2f$',
		0,
		'$tree.growth\\_rate$',
		'(ORDER mm$^2$ mm$^{-2}$)'
	];
	return \@item_list;
}