Part 94 of the Perl Tutorial shows how to create and use multidimensional hashes of hashes.
Perl Tutorial 94 - Hashes of Hashes
Part 14 of the Perl Tutorial explores hashes. How to create hashes and reference each key/value pair.
Perl Tutorial 14 - Hashes: Basics
use of a perl hash for restriction enzymes. The hash contains references to hashes as values. Thereby different (more than one) properties of the enzymes can ...
hash of hashes