in reply to Mapping to an associative hash
Is perhaps a "hash of hashes" what you are looking for? I.e. you have a top-level hash which is keyed by the ID-number and which refers to another hash which has all the keys you mention.
If that fits your idea, have a look at perldoc perldsc which will explain it in full detail.
CountZero
"If you have four groups working on a compiler, you'll get a 4-pass compiler." - Conway's Law
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