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1.3 Overview

Lempel-Ziv Extended Delta (LZXD) compression provides a mechanism for both the compressor and the decompressor to refer to a common reference set of data. It relaxes the constraint that the match offset be constrained to less than the current position in the output stream, allowing the match offset to refer to the logically prepended reference data. This relaxed constraint effectively enables the compressed data stream to encode "matches" both from the reference data and from the uncompressed data stream.

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