Possible compression types for content
cDF: Deflate : The deflate compressed data format as specified in IETF RFC 1951
cGZ: GZIP : A compressed data format that is compatible with the widely used GZIP utility as specified in IETF RFC 1952(uses the deflate algorithm)
cZL: ZLIB : A compressed data format that also uses the deflate algorithm. Specified as IETF RFC 1950
cZ: Compress : Original UNIX compress algorithm and file format using the LZC algorithm (a variant of LZW). Patent encumbered and less efficient than deflate
cBZ: BZIP : bzip-2 compression format. See [http://www.bzip.org/] for more information.
cZ7: Z7 : 7z compression file format. See [http://www.7-zip.org/7z.html] for more information.