XMLPPM: XML-Conscious PPM Compression
XMLPPM is a data compression program that compresses XML files from 5 to 30% better than any existing text or XML-specific compressors. It is a combination of the well-known Prediction by Partial Match (PPM) algorithm for text compression, first described by Cleary and Witten in 1984, and an approach to modeling tree-structured data called Multiplexed Hierarchical Modeling (MHM)