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1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
2<html>
3        <head>
4                <title>GNU Lesser General Public License</title>
5                <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
6                <STYLE>
7                        BODY { FONT-SIZE: 12px }
8                </STYLE>
9        </head>
10        <body>
11                <H3>GNU Lesser General Public License</H3>
12                <TT>
13                        <P>Version 2.1, February 1999</P>
14                        <BLOCKQUOTE>
15                                <P>Copyright (C) 1991, 1999 Free Software Foundation, Inc. 59 Temple Place, Suite
16                                        330, Boston, MA 02111-1307 USA Everyone is permitted to copy and distribute
17                                        verbatim copies of this license document, but changing it is not allowed.</P>
18                                <P>[This is the first released version of the Lesser GPL. It also counts as the
19                                        successor of the GNU Library Public License, version 2, hence the version
20                                        number 2.1.]</P>
21                        </BLOCKQUOTE>
22                        <H4>Preamble</H4>
23                        <P>The licenses for most software are designed to take away your freedom to share
24                                and change it. By contrast, the GNU General Public Licenses are intended to
25                                guarantee your freedom to share and change free software--to make sure the
26                                software is free for all its users.
27                        </P>
28                        <P>This license, the Lesser General Public License, applies to some specially
29                                designated software packages--typically libraries--of the Free Software
30                                Foundation and other authors who decide to use it. You can use it too, but we
31                                suggest you first think carefully about whether this license or the ordinary
32                                General Public License is the better strategy to use in any particular case,
33                                based on the explanations below.
34                        </P>
35                        <P>When we speak of free software, we are referring to freedom of use, not price.
36                                Our General Public Licenses are designed to make sure that you have the freedom
37                                to distribute copies of free software (and charge for this service if you
38                                wish); that you receive source code or can get it if you want it; that you can
39                                change the software and use pieces of it in new free programs; and that you are
40                                informed that you can do these things.</P>
41                        <P>To protect your rights, we need to make restrictions that forbid distributors to
42                                deny you these rights or to ask you to surrender these rights. These
43                                restrictions translate to certain responsibilities for you if you distribute
44                                copies of the library or if you modify it.
45                        </P>
46                        <P>For example, if you distribute copies of the library, whether gratis or for a
47                                fee, you must give the recipients all the rights that we gave you. You must
48                                make sure that they, too, receive or can get the source code. If you link other
49                                code with the library, you must provide complete object files to the
50                                recipients, so that they can relink them with the library after making changes
51                                to the library and recompiling it. And you must show them these terms so they
52                                know their rights.
53                        </P>
54                        <P>We protect your rights with a two-step method: (1) we copyright the library, and
55                                (2) we offer you this license, which gives you legal permission to copy,
56                                distribute and/or modify the library.
57                        </P>
58                        <P>To protect each distributor, we want to make it very clear that there is no
59                                warranty for the free library. Also, if the library is modified by someone else
60                                and passed on, the recipients should know that what they have is not the
61                                original version, so that the original author's reputation will not be affected
62                                by problems that might be introduced by others.
63                        </P>
64                        <P>Finally, software patents pose a constant threat to the existence of any free
65                                program. We wish to make sure that a company cannot effectively restrict the
66                                users of a free program by obtaining a restrictive license from a patent
67                                holder. Therefore, we insist that any patent license obtained for a version of
68                                the library must be consistent with the full freedom of use specified in this
69                                license.
70                        </P>
71                        <P>Most GNU software, including some libraries, is covered by the ordinary GNU
72                                General Public License. This license, the GNU Lesser General Public License,
73                                applies to certain designated libraries, and is quite different from the
74                                ordinary General Public License. We use this license for certain libraries in
75                                order to permit linking those libraries into non-free programs.
76                        </P>
77                        <P>When a program is linked with a library, whether statically or using a shared
78                                library, the combination of the two is legally speaking a combined work, a
79                                derivative of the original library. The ordinary General Public License
80                                therefore permits such linking only if the entire combination fits its criteria
81                                of freedom. The Lesser General Public License permits more lax criteria for
82                                linking other code with the library.
83                        </P>
84                        <P>We call this license the "Lesser" General Public License because it does Less to
85                                protect the user's freedom than the ordinary General Public License. It also
86                                provides other free software developers Less of an advantage over competing
87                                non-free programs. These disadvantages are the reason we use the ordinary
88                                General Public License for many libraries. However, the Lesser license provides
89                                advantages in certain special circumstances.
90                        </P>
91                        <P>For example, on rare occasions, there may be a special need to encourage the
92                                widest possible use of a certain library, so that it becomes a de-facto
93                                standard. To achieve this, non-free programs must be allowed to use the
94                                library. A more frequent case is that a free library does the same job as
95                                widely used non-free libraries. In this case, there is little to gain by
96                                limiting the free library to free software only, so we use the Lesser General
97                                Public License.
98                        </P>
99                        <P>In other cases, permission to use a particular library in non-free programs
100                                enables a greater number of people to use a large body of free software. For
101                                example, permission to use the GNU C Library in non-free programs enables many
102                                more people to use the whole GNU operating system, as well as its variant, the
103                                GNU/Linux operating system.
104                        </P>
105                        <P>Although the Lesser General Public License is Less protective of the users'
106                                freedom, it does ensure that the user of a program that is linked with the
107                                Library has the freedom and the wherewithal to run that program using a
108                                modified version of the Library.
109                        </P>
110                        <P>The precise terms and conditions for copying, distribution and modification
111                                follow. Pay close attention to the difference between a "work based on the
112                                library" and a "work that uses the library". The former contains code derived
113                                from the library, whereas the latter must be combined with the library in order
114                                to run.
115                        </P>
116                        <H4>TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION</H4>
117                        <P><STRONG>0.</STRONG> This License Agreement applies to any software library or
118                                other program which contains a notice placed by the copyright holder or other
119                                authorized party saying it may be distributed under the terms of this Lesser
120                                General Public License (also called "this License"). Each licensee is addressed
121                                as "you".</P>
122                        <P>A "library" means a collection of software functions and/or data prepared so as
123                                to be conveniently linked with application programs (which use some of those
124                                functions and data) to form executables.
125                        </P>
126                        <P>The "Library", below, refers to any such software library or work which has been
127                                distributed under these terms. A "work based on the Library" means either the
128                                Library or any derivative work under copyright law: that is to say, a work
129                                containing the Library or a portion of it, either verbatim or with
130                                modifications and/or translated straightforwardly into another language.
131                                (Hereinafter, translation is included without limitation in the term
132                                "modification".)
133                        </P>
134                        <P>"Source code" for a work means the preferred form of the work for making
135                                modifications to it. For a library, complete source code means all the source
136                                code for all modules it contains, plus any associated interface definition
137                                files, plus the scripts used to control compilation and installation of the
138                                library.</P>
139                        <P>Activities other than copying, distribution and modification are not covered by
140                                this License; they are outside its scope. The act of running a program using
141                                the Library is not restricted, and output from such a program is covered only
142                                if its contents constitute a work based on the Library (independent of the use
143                                of the Library in a tool for writing it). Whether that is true depends on what
144                                the Library does and what the program that uses the Library does.
145                        </P>
146                        <P><STRONG>1.</STRONG> You may copy and distribute verbatim copies of the Library's
147                                complete source code as you receive it, in any medium, provided that you
148                                conspicuously and appropriately publish on each copy an appropriate copyright
149                                notice and disclaimer of warranty; keep intact all the notices that refer to
150                                this License and to the absence of any warranty; and distribute a copy of this
151                                License along with the Library.
152                        </P>
153                        <P>You may charge a fee for the physical act of transferring a copy, and you may at
154                                your option offer warranty protection in exchange for a fee.
155                        </P>
156                        <P><STRONG>2.</STRONG> You may modify your copy or copies of the Library or any
157                                portion of it, thus forming a work based on the Library, and copy and
158                                distribute such modifications or work under the terms of Section 1 above,
159                                provided that you also meet all of these conditions:
160                        </P>
161                        <BLOCKQUOTE>
162                                <P>a) The modified work must itself be a software library.
163                                </P>
164                                <P>b) You must cause the files modified to carry prominent notices stating that you
165                                        changed the files and the date of any change.</P>
166                                <P>c) You must cause the whole of the work to be licensed at no charge to all third
167                                        parties under the terms of this License.
168                                </P>
169                                <P>d) If a facility in the modified Library refers to a function or a table of data
170                                        to be supplied by an application program that uses the facility, other than as
171                                        an argument passed when the facility is invoked, then you must make a good
172                                        faith effort to ensure that, in the event an application does not supply such
173                                        function or table, the facility still operates, and performs whatever part of
174                                        its purpose remains meaningful.
175                                </P>
176                                <P>(For example, a function in a library to compute square roots has a purpose that
177                                        is entirely well-defined independent of the application. Therefore, Subsection
178                                        2d requires that any application-supplied function or table used by this
179                                        function must be optional: if the application does not supply it, the square
180                                        root function must still compute square roots.)
181                                </P>
182                                <P>These requirements apply to the modified work as a whole. If identifiable
183                                        sections of that work are not derived from the Library, and can be reasonably
184                                        considered independent and separate works in themselves, then this License, and
185                                        its terms, do not apply to those sections when you distribute them as separate
186                                        works. But when you distribute the same sections as part of a whole which is a
187                                        work based on the Library, the distribution of the whole must be on the terms
188                                        of this License, whose permissions for other licensees extend to the entire
189                                        whole, and thus to each and every part regardless of who wrote it.
190                                </P>
191                                <P>Thus, it is not the intent of this section to claim rights or contest your
192                                        rights to work written entirely by you; rather, the intent is to exercise the
193                                        right to control the distribution of derivative or collective works based on
194                                        the Library.
195                                </P>
196                                <P>In addition, mere aggregation of another work not based on the Library with the
197                                        Library (or with a work based on the Library) on a volume of a storage or
198                                        distribution medium does not bring the other work under the scope of this
199                                        License.
200                                </P>
201                        </BLOCKQUOTE>
202                        <P><STRONG>3.</STRONG> You may opt to apply the terms of the ordinary GNU General
203                                Public License instead of this License to a given copy of the Library. To do
204                                this, you must alter all the notices that refer to this License, so that they
205                                refer to the ordinary GNU General Public License, version 2, instead of to this
206                                License. (If a newer version than version 2 of the ordinary GNU General Public
207                                License has appeared, then you can specify that version instead if you wish.)
208                                Do not make any other change in these notices.
209                        </P>
210                        <P>Once this change is made in a given copy, it is irreversible for that copy, so
211                                the ordinary GNU General Public License applies to all subsequent copies and
212                                derivative works made from that copy.
213                        </P>
214                        <P>This option is useful when you wish to copy part of the code of the Library into
215                                a program that is not a library.
216                        </P>
217                        <P><STRONG>4.</STRONG> You may copy and distribute the Library (or a portion or
218                                derivative of it, under Section 2) in object code or executable form under the
219                                terms of Sections 1 and 2 above provided that you accompany it with the
220                                complete corresponding machine-readable source code, which must be distributed
221                                under the terms of Sections 1 and 2 above on a medium customarily used for
222                                software interchange.
223                        </P>
224                        <P>If distribution of object code is made by offering access to copy from a
225                                designated place, then offering equivalent access to copy the source code from
226                                the same place satisfies the requirement to distribute the source code, even
227                                though third parties are not compelled to copy the source along with the object
228                                code.</P>
229                        <P><STRONG>5.</STRONG> A program that contains no derivative of any portion of the
230                                Library, but is designed to work with the Library by being compiled or linked
231                                with it, is called a "work that uses the Library". Such a work, in isolation,
232                                is not a derivative work of the Library, and therefore falls outside the scope
233                                of this License.
234                        </P>
235                        <P>However, linking a "work that uses the Library" with the Library creates an
236                                executable that is a derivative of the Library (because it contains portions of
237                                the Library), rather than a "work that uses the library". The executable is
238                                therefore covered by this License. Section 6 states terms for distribution of
239                                such executables.
240                        </P>
241                        <P>When a "work that uses the Library" uses material from a header file that is
242                                part of the Library, the object code for the work may be a derivative work of
243                                the Library even though the source code is not. Whether this is true is
244                                especially significant if the work can be linked without the Library, or if the
245                                work is itself a library. The threshold for this to be true is not precisely
246                                defined by law.
247                        </P>
248                        <P>If such an object file uses only numerical parameters, data structure layouts
249                                and accessors, and small macros and small inline functions (ten lines or less
250                                in length), then the use of the object file is unrestricted, regardless of
251                                whether it is legally a derivative work. (Executables containing this object
252                                code plus portions of the Library will still fall under Section 6.)
253                        </P>
254                        <P>Otherwise, if the work is a derivative of the Library, you may distribute the
255                                object code for the work under the terms of Section 6. Any executables
256                                containing that work also fall under Section 6, whether or not they are linked
257                                directly with the Library itself.
258                        </P>
259                        <P><STRONG>6.</STRONG> As an exception to the Sections above, you may also combine
260                                or link a "work that uses the Library" with the Library to produce a work
261                                containing portions of the Library, and distribute that work under terms of
262                                your choice, provided that the terms permit modification of the work for the
263                                customer's own use and reverse engineering for debugging such modifications.
264                        </P>
265                        <P>You must give prominent notice with each copy of the work that the Library is
266                                used in it and that the Library and its use are covered by this License. You
267                                must supply a copy of this License. If the work during execution displays
268                                copyright notices, you must include the copyright notice for the Library among
269                                them, as well as a reference directing the user to the copy of this License.
270                                Also, you must do one of these things:
271                        </P>
272                        <BLOCKQUOTE>
273                                <P>a) Accompany the work with the complete corresponding machine-readable source
274                                        code for the Library including whatever changes were used in the work (which
275                                        must be distributed under Sections 1 and 2 above); and, if the work is an
276                                        executable linked with the Library, with the complete machine-readable "work
277                                        that uses the Library", as object code and/or source code, so that the user can
278                                        modify the Library and then relink to produce a modified executable containing
279                                        the modified Library. (It is understood that the user who changes the contents
280                                        of definitions files in the Library will not necessarily be able to recompile
281                                        the application to use the modified definitions.)
282                                </P>
283                                <P>b) Use a suitable shared library mechanism for linking with the Library. A
284                                        suitable mechanism is one that (1) uses at run time a copy of the library
285                                        already present on the user's computer system, rather than copying library
286                                        functions into the executable, and (2) will operate properly with a modified
287                                        version of the library, if the user installs one, as long as the modified
288                                        version is interface-compatible with the version that the work was made with.
289                                </P>
290                                <P>c) Accompany the work with a written offer, valid for at least three years, to
291                                        give the same user the materials specified in Subsection 6a, above, for a
292                                        charge no more than the cost of performing this distribution.
293                                </P>
294                                <P>d) If distribution of the work is made by offering access to copy from a
295                                        designated place, offer equivalent access to copy the above specified materials
296                                        from the same place.
297                                </P>
298                                <P>e) Verify that the user has already received a copy of these materials or that
299                                        you have already sent this user a copy.</P>
300                        </BLOCKQUOTE>
301                        <P>For an executable, the required form of the "work that uses the Library" must
302                                include any data and utility programs needed for reproducing the executable
303                                from it. However, as a special exception, the materials to be distributed need
304                                not include anything that is normally distributed (in either source or binary
305                                form) with the major components (compiler, kernel, and so on) of the operating
306                                system on which the executable runs, unless that component itself accompanies
307                                the executable.
308                        </P>
309                        <P>It may happen that this requirement contradicts the license restrictions of
310                                other proprietary libraries that do not normally accompany the operating
311                                system. Such a contradiction means you cannot use both them and the Library
312                                together in an executable that you distribute.
313                        </P>
314                        <P><STRONG>7.</STRONG> You may place library facilities that are a work based on
315                                the Library side-by-side in a single library together with other library
316                                facilities not covered by this License, and distribute such a combined library,
317                                provided that the separate distribution of the work based on the Library and of
318                                the other library facilities is otherwise permitted, and provided that you do
319                                these two things:
320                        </P>
321                        <BLOCKQUOTE>
322                                <P>a) Accompany the combined library with a copy of the same work based on the
323                                        Library, uncombined with any other library facilities. This must be distributed
324                                        under the terms of the Sections above.
325                                </P>
326                                <P>b) Give prominent notice with the combined library of the fact that part of it
327                                        is a work based on the Library, and explaining where to find the accompanying
328                                        uncombined form of the same work.</P>
329                        </BLOCKQUOTE>
330                        <P><STRONG>8.</STRONG> You may not copy, modify, sublicense, link with, or
331                                distribute the Library except as expressly provided under this License. Any
332                                attempt otherwise to copy, modify, sublicense, link with, or distribute the
333                                Library is void, and will automatically terminate your rights under this
334                                License. However, parties who have received copies, or rights, from you under
335                                this License will not have their licenses terminated so long as such parties
336                                remain in full compliance.
337                        </P>
338                        <P><STRONG>9.</STRONG> You are not required to accept this License, since you have
339                                not signed it. However, nothing else grants you permission to modify or
340                                distribute the Library or its derivative works. These actions are prohibited by
341                                law if you do not accept this License. Therefore, by modifying or distributing
342                                the Library (or any work based on the Library), you indicate your acceptance of
343                                this License to do so, and all its terms and conditions for copying,
344                                distributing or modifying the Library or works based on it.
345                        </P>
346                        <P><STRONG>10.</STRONG> Each time you redistribute the Library (or any work based
347                                on the Library), the recipient automatically receives a license from the
348                                original licensor to copy, distribute, link with or modify the Library subject
349                                to these terms and conditions. You may not impose any further restrictions on
350                                the recipients' exercise of the rights granted herein. You are not responsible
351                                for enforcing compliance by third parties with this License.
352                        </P>
353                        <P><STRONG>11.</STRONG> If, as a consequence of a court judgment or allegation of
354                                patent infringement or for any other reason (not limited to patent issues),
355                                conditions are imposed on you (whether by court order, agreement or otherwise)
356                                that contradict the conditions of this License, they do not excuse you from the
357                                conditions of this License. If you cannot distribute so as to satisfy
358                                simultaneously your obligations under this License and any other pertinent
359                                obligations, then as a consequence you may not distribute the Library at all.
360                                For example, if a patent license would not permit royalty-free redistribution
361                                of the Library by all those who receive copies directly or indirectly through
362                                you, then the only way you could satisfy both it and this License would be to
363                                refrain entirely from distribution of the Library.
364                        </P>
365                        <P>If any portion of this section is held invalid or unenforceable under any
366                                particular circumstance, the balance of the section is intended to apply, and
367                                the section as a whole is intended to apply in other circumstances.
368                        </P>
369                        <P>It is not the purpose of this section to induce you to infringe any patents or
370                                other property right claims or to contest validity of any such claims; this
371                                section has the sole purpose of protecting the integrity of the free software
372                                distribution system which is implemented by public license practices. Many
373                                people have made generous contributions to the wide range of software
374                                distributed through that system in reliance on consistent application of that
375                                system; it is up to the author/donor to decide if he or she is willing to
376                                distribute software through any other system and a licensee cannot impose that
377                                choice.
378                        </P>
379                        <P>This section is intended to make thoroughly clear what is believed to be a
380                                consequence of the rest of this License.
381                        </P>
382                        <P><STRONG>12.</STRONG> If the distribution and/or use of the Library is restricted
383                                in certain countries either by patents or by copyrighted interfaces, the
384                                original copyright holder who places the Library under this License may add an
385                                explicit geographical distribution limitation excluding those countries, so
386                                that distribution is permitted only in or among countries not thus excluded. In
387                                such case, this License incorporates the limitation as if written in the body
388                                of this License.
389                        </P>
390                        <P><STRONG>13.</STRONG> The Free Software Foundation may publish revised and/or new
391                                versions of the Lesser General Public License from time to time. Such new
392                                versions will be similar in spirit to the present version, but may differ in
393                                detail to address new problems or concerns.</P>
394                        <P>Each version is given a distinguishing version number. If the Library specifies
395                                a version number of this License which applies to it and "any later version",
396                                you have the option of following the terms and conditions either of that
397                                version or of any later version published by the Free Software Foundation. If
398                                the Library does not specify a license version number, you may choose any
399                                version ever published by the Free Software Foundation.
400                        </P>
401                        <P><STRONG>14.</STRONG> If you wish to incorporate parts of the Library into other
402                                free programs whose distribution conditions are incompatible with these, write
403                                to the author to ask for permission. For software which is copyrighted by the
404                                Free Software Foundation, write to the Free Software Foundation; we sometimes
405                                make exceptions for this. Our decision will be guided by the two goals of
406                                preserving the free status of all derivatives of our free software and of
407                                promoting the sharing and reuse of software generally.
408                        </P>
409                        <P>NO WARRANTY
410                        </P>
411                        <P><STRONG>15. </STRONG>BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
412                                WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT
413                                WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
414                                PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR
415                                IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
416                                MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE
417                                QUALITY AND PERFORMANCE OF THE LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE
418                                DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
419                                CORRECTION.
420                        </P>
421                        <P><STRONG>16.</STRONG> IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO
422                                IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
423                                REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
424                                INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT
425                                OF THE USE OR INABILITY TO USE THE LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS
426                                OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
427                                PARTIES OR A FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN
428                                IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
429                                DAMAGES.
430                        </P>
431                        <H4><STRONG>END OF TERMS AND CONDITIONS</STRONG></H4>
432                </TT>
433        </body>
434</html>
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