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<html><head><title>LZ4 Framing format - v1.5.0</title><meta content="text/html; charset=UTF-8" http-equiv="content-type"><style type="text/css">@import url('https://themes.googleusercontent.com/fonts/css?kit=wAPX1HepqA24RkYW1AuHYA');ol{margin:0;padding:0}.c8{max-width:453.6pt;background-color:#ffffff;padding:70.8pt 70.8pt 70.8pt 70.8pt}.c2{font-size:14pt;text-decoration:underline;font-weight:bold}.c12{font-size:10pt;font-family:"Courier New"}.c1{color:#1155cc;text-decoration:underline}.c4{text-decoration:underline;font-weight:bold}.c10{color:inherit;text-decoration:inherit}.c17{line-height:1.0;padding-bottom:0pt}.c3{height:11pt;text-align:center}.c0{direction:ltr}.c7{font-weight:bold}.c19{margin-left:36pt}.c15{font-size:18pt}.c16{font-family:"Courier New"}.c14{font-style:italic}.c9{font-size:14pt}.c18{color:#0000ff}.c13{margin-left:18pt}.c6{height:11pt}.c11{text-align:center}.c5{text-decoration:underline}.title{padding-top:12pt;line-height:1.15;text-align:center;color:#000000;font-size:16pt;font-family:"Arial";font-weight:bold;padding-bottom:3pt}.subtitle{padding-top:0pt;line-height:1.15;text-align:center;color:#000000;font-size:11pt;font-family:"Arial";padding-bottom:3pt}li{color:#000000;font-size:11pt;font-family:"Calibri"}p{color:#000000;font-size:11pt;margin:0;font-family:"Calibri"}h1{padding-top:12pt;line-height:1.15;text-align:left;color:#000000;font-size:16pt;font-family:"Arial";font-weight:bold;padding-bottom:3pt}h2{padding-top:12pt;line-height:1.15;text-align:left;color:#000000;font-style:italic;font-size:14pt;font-family:"Arial";font-weight:bold;padding-bottom:3pt}h3{padding-top:12pt;line-height:1.15;text-align:left;color:#000000;font-size:13pt;font-family:"Arial";font-weight:bold;padding-bottom:3pt}h4{padding-top:12pt;line-height:1.15;text-align:left;color:#000000;font-size:14pt;font-family:"Calibri";font-weight:bold;padding-bottom:3pt}h5{padding-top:12pt;line-height:1.15;text-align:left;color:#000000;font-style:italic;font-size:13pt;font-family:"Calibri";font-weight:bold;padding-bottom:3pt}h6{padding-top:12pt;line-height:1.15;text-align:left;color:#000000;font-size:11pt;font-family:"Calibri";font-weight:bold;padding-bottom:3pt}</style></head><body class="c8"><hr><p class="c0 c11"><span class="c7 c15">LZ4 </span><span class="c7 c15">Framing </span><span class="c7 c15">Format</span></p><hr><p class="c0 c6"><span class="c7 c15"></span></p><p class="c0"><span class="c2">Notices</span></p><p class="c0"><span>Copyright (c) 2013-2015 Yann Collet</span></p><p class="c0"><span>Permission is granted to copy and distribute this document for any purpose and without charge, including translations into other languages and incorporation into compilations, provided that the copyright notice and this notice are preserved, and that any substantive changes or deletions from the original are clearly marked.</span></p><p class="c0"><span class="c2">Version</span></p><p class="c0"><span>1.5.0</span></p><h1 class="c0"><a name="h.2z5bl598dfq9"></a><span>Introduction</span></h1><p class="c0"><span>The purpose of this document is to define a lossless compressed data format, that is independent of CPU type, operating system, file system and character set, suitable for File compression, Pipe and streaming compression using the LZ4 algorithm : </span><span class="c5 c18"><a class="c10" href="">http://code.google.com/p/lz4/</a></span></p><p class="c0"><span>The data can be produced or consumed, even for an arbitrarily long sequentially presented input data stream, using only an a priori bounded amount of intermediate storage, and hence can be used in data communications. The format uses the LZ4 compression method, and optional </span><span class="c1"><a class="c10" href="http://code.google.com/p/xxhash/">xxHash-32</a></span><span> checksum method, for detection of data corruption.</span></p><p class="c0"><span>The data format defined by this specification does not attempt to allow random access to compressed data.</span></p><p class="c0"><span>This specification is intended for use by implementers of software to co
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