<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml111.dtd"><html><head><title>GNU Lesser General Public License</title><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><style type="text/css">body { margin: 0; padding: 0; background-color: #FFFFFF; color: #000000;}body div.main { border: 1px solid #cccccc; background-color: #F1F3F5; margin: 10px; padding: 10px;}* { font-family: verdana, tahoma, arial, helvetica, sans-serif; font-size: 8pt;}p { margin-left: 1.5em;}h1, h2, h3 { color: #50A0D0; font-weight: normal; font-family: 'trebuchet ms', verdana, tahoma, arial, helvetica, sans-serif;}h1 { font-size: 16pt;}h2 { font-size: 12pt; margin-left: 0.5em;}h3 { font-size: 10pt; margin-left: 1em;}a:link, a:visited, a:active { color: #3080B0; text-decoration: none; border-bottom: 1px dotted #50A0D0;}a:hover { color: #50A0D0; border-bottom: 1px solid #50A0D0;}pre { font-family: 'courier new', monospace; background-color: #F8F8F8; margin: 10px 10px 10px 30px; max-height: 150px; clip: rect(0px,auto,auto,0px); overflow: auto; padding: 10px; border: 1px solid #3060B0;}li { list-style-type: square;}div.copyright { text-align: right; font-size: smaller;}div.copyright * { font-size: smaller;}</style></head><body><div class="main"><h1>GNU Lesser General Public License</h1><!-- BEGIN LICENSE TEXT --><p>Version 2.1, February 1999</p><pre>Copyright (C) 1991, 1999 Free Software Foundation, Inc.51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USAEveryone is permitted to copy and distribute verbatim copiesof this license document, but changing it is not allowed.[This is the first released version of the Lesser GPL. It also counts as the successor of the GNU Library Public License, version 2, hence the version number 2.1.]</pre><h2>Preamble</h2><p>The licenses for most software are designed to take away yourfreedom to share and change it. By contrast, the GNU GeneralPublic Licenses are intended to guarantee your freedom to shareand change free software--to make sure the software is free forall its users.</p><p>This license, the Lesser General Public License, applies tosome specially designated software packages--typicallylibraries--of the Free Software Foundation and other authors whodecide to use it. You can use it too, but we suggest you firstthink carefully about whether this license or the ordinaryGeneral Public License is the better strategy to use in anyparticular case, based on the explanations below.</p><p>When we speak of free software, we are referring to freedom ofuse, not price. Our General Public Licenses are designed to makesure that you have the freedom to distribute copies of freesoftware (and charge for this service if you wish); that youreceive source code or can get it if you want it; that you canchange the software and use pieces of it in new free programs;and that you are informed that you can do these things.</p><p>To protect your rights, we need to make restrictions thatforbid distributors to deny you these rights or to ask you tosurrender these rights. These restrictions translate to certainresponsibilities for you if you distribute copies of the libraryor if you modify it.</p><p>For example, if you distribute copies of the library, whethergratis or for a fee, you must give the recipients all the rightsthat we gave you. You must make sure that they, too, receive orcan get the source code. 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We wish to make sure that acompany cannot effectively restrict the users of a free programby obtaining a restrictive license from a patent holder.Therefore, we insist that any patent license obtained for aversion of the library must be consistent with the full freedomof use specified in this license.</p><p>Most GNU software, including some libraries, is covered by theordinary GNU General Public License. This license, the GNU LesserGeneral Public License, applies to certain designated libraries,and is quite different from the ordinary General Public License.We use this license for certain libraries in order to permitlinking those libraries into non-free programs.</p><p>When a program is linked with a library, whether statically orusing a shared library, the combination of the two is legallyspeaking a combined work, a derivative of the original library.The ordinary General Public License therefore permits suchlinking only if the entire combination fits its criteria offreedom. 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