If I only look at your sample data, you could use a formula instead of a translation table: 

my $new = ord( uc $old ) - 64;

[download]

For your more general question, I would suggest to translate your table into a hash of hashes and use XML::Simple to read and write the data.

In reply to Re: Reclassification based on XML map by hdb
in thread Reclassification based on XML map by karthik167

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