open FILE, $infile;
@lines = <FILE>;
close FILE;

for $i (0 .. $#lines) {
	if ($lines($i) ne "") {
		($tag, $value) = split(/:/, $lines($i));
		$temp{$tag} = $value;
	}
	else {
		#reached end of a data grouping, now process it
		if exists $temp{'employee_id'} {
			foreach $field (keys %temp) {
				$employee_info{$field} = $temp{$field};
			}
		}
		elseif (exists $temp{'position_id') && exists $temp{'title'}) {
			$positions{$temp{'position_id')} = $temp{'title'};
		}
		elseif {
		....etc...
		}
	...etc...
	}
	...clear %temp...
}

foreach $employee (keys %employee_info) {
	output info, drawing labels from %positions, %departments, etc...
}