Editing Template:Zlib Header

{| class="wikitable" style="text-align: center;"
|+Zlib Header ([http://tools.ietf.org/html/rfc1950#section-2.2 source])
!width="100"|byte index
!width="60"|bit 7
!width="60"|bit 6
!width="60"|bit 5
!width="60"|bit 4
!width="60"|bit 3
!width="60"|bit 2
!width="60"|bit 1
!width="60"|bit 0
|-
|[0] '''CMF'''
|colspan="4"|'''Compression info'''
*7 = indicates a 32K window size
|colspan="4"|'''Compression method'''
*8 = denotes the "deflate" compression
|-
|[1] '''FLG'''
|colspan="2"|'''FLEVEL'''
* 0 - compressor used fastest algorithm
* 1 - compressor used fast algorithm
* 2 - compressor used default algorithm
* 3 - compressor used maximum compression, slowest algorithm
|colspan="1"|'''FDICT'''
(Preset dictionary)
 If set, a DICT dictionary identifier is present
 immediately after the FLG byte. The dictionary is a sequence of
 bytes which are initially fed to the compressor without
 producing any compressed output. DICT is the Adler-32 checksum
 of this sequence of bytes (see the definition of ADLER32
 below).  The decompressor can use this identifier to determine
 which dictionary has been used by the compressor.
|colspan="5"|'''FCHECK'''
 value must be such that CMF and FLG, when viewed as
 a 16-bit unsigned integer stored in MSB order (CMF *256 + FLG),
 is a multiple of 31.
|-
|}


About Data Compression:

*[http://mattmahoney.net/dc/dce.html mattmahoney.net/dc/dce.html]


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