liblzma-doc 4.999.9beta+20091116-1 (i386 binary) in ubuntu lucid

 XZ is the successor to the Lempel-Ziv/Markov-chain Algorithm
 compression format, which provides memory-hungry but powerful
 compression (often better than bzip2) and fast, easy decompression.
 .
 The native format of liblzma is XZ; it also supports raw (headerless)
 streams and the older LZMA format used by lzma. (For 7-Zip's related
 format, use the p7zip package instead.)
 .
 This package contains a reference manual for the liblzma data
 compression library, in Doxygen-generated HTML files. The purpose
 of each struct, macro, and function in the public interface is
 explained.