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CA Compress provides six algorithms that apply the Huffman compression method but with its own FDT. The unique FDTs are an integral part of each of the Standard Huffman algorithms. The standard FDTs have been designed to maximize compression for six of the most common data configurations. The Standard tables and the data configurations maximized are:
Alphanumeric Uppercase
Alphanumeric Upper and Lowercase
Packed Decimal Data
Alphanumeric, 45% Packed Decimal Data
Upper and Lowercase, 35% Packed Decimal
Alphanumeric, 20% Packed Decimal, Binary Data
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