source: pmb4.2/trunk/fuentes/pmb/gpl.html @ 819

Last change on this file since 819 was 815, checked in by jrpelegrina, 4 years ago

Initial release of pmb 4.2

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4<HEAD><TITLE>The GNU General Public License (GPL)</TITLE>
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13      <H1>The GNU General Public License (GPL)</H1>
14      <H2>Version 2, June 1991</H2><TT>
15      <P>Copyright (C) 1989, 1991 Free Software Foundation, Inc.<br />59 Temple
16      Place, Suite 330, Boston, MA 02111-1307 USA</P>
17      <P>Everyone is permitted to copy and distribute verbatim copies<br />of this
18      license document, but changing it is not allowed.</P><STRONG>
19      <P>Preamble</P></STRONG>
20      <P>The licenses for most software are designed to take away your freedom
21      to share and change it. By contrast, the GNU General Public License is
22      intended to guarantee your freedom to share and change free software--to
23      make sure the software is free for all its users. This General Public
24      License applies to most of the Free Software Foundation's software and to
25      any other program whose authors commit to using it. (Some other Free
26      Software Foundation software is covered by the GNU Library General Public
27      License instead.) You can apply it to your programs, too.</P>
28      <P>When we speak of free software, we are referring to freedom, not price.
29      Our General Public Licenses are designed to make sure that you have the
30      freedom to distribute copies of free software (and charge for this service
31      if you wish), that you receive source code or can get it if you want it,
32      that you can change the software or use pieces of it in new free programs;
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34      <P>To protect your rights, we need to make restrictions that forbid anyone
35      to deny you these rights or to ask you to surrender the rights. These
36      restrictions translate to certain responsibilities for you if you
37      distribute copies of the software, or if you modify it.</P>
38      <P>For example, if you distribute copies of such a program, whether gratis
39      or for a fee, you must give the recipients all the rights that you have.
40      You must make sure that they, too, receive or can get the source code. And
41      you must show them these terms so they know their rights.</P>
42      <P>We protect your rights with two steps: (1) copyright the software, and
43      (2) offer you this license which gives you legal permission to copy,
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58      <P>TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND
59      MODIFICATION</P></STRONG>
60      <P><STRONG>0</STRONG>. This License applies to any program or other work
61      which contains a notice placed by the copyright holder saying it may be
62      distributed under the terms of this General Public License. The "Program",
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64      Program" means either the Program or any derivative work under copyright
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68      term "modification".) Each licensee is addressed as "you".</P>
69      <P>Activities other than copying, distribution and modification are not
70      covered by this License; they are outside its scope. The act of running
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72      only if its contents constitute a work based on the Program (independent
73      of having been made by running the Program). Whether that is true depends
74      on what the Program does.</P>
75      <P><STRONG>1</STRONG>. You may copy and distribute verbatim copies of the
76      Program's source code as you receive it, in any medium, provided that you
77      conspicuously and appropriately publish on each copy an appropriate
78      copyright notice and disclaimer of warranty; keep intact all the notices
79      that refer to this License and to the absence of any warranty; and give
80      any other recipients of the Program a copy of this License along with the
81      Program.</P>
82      <P>You may charge a fee for the physical act of transferring a copy, and
83      you may at your option offer warranty protection in exchange for a
84fee.</P>
85      <P><STRONG>2</STRONG>. You may modify your copy or copies of the Program
86      or any portion of it, thus forming a work based on the Program, and copy
87      and distribute such modifications or work under the terms of Section 1
88      above, provided that you also meet all of these conditions:</P>
89      <BLOCKQUOTE>
90        <P>a) You must cause the modified files to carry prominent notices
91        stating that you changed the files and the date of any change.</P>
92        <P>b) You must cause any work that you distribute or publish, that in
93        whole or in part contains or is derived from the Program or any part
94        thereof, to be licensed as a whole at no charge to all third parties
95        under the terms of this License.</P>
96        <P>c) If the modified program normally reads commands interactively when
97        run, you must cause it, when started running for such interactive use in
98        the most ordinary way, to print or display an announcement including an
99        appropriate copyright notice and a notice that there is no warranty (or
100        else, saying that you provide a warranty) and that users may
101        redistribute the program under these conditions, and telling the user
102        how to view a copy of this License. (Exception: if the Program itself is
103        interactive but does not normally print such an announcement, your work
104        based on the Program is not required to print an
105      announcement.)</P></BLOCKQUOTE>
106      <P>These requirements apply to the modified work as a whole. If
107      identifiable sections of that work are not derived from the Program, and
108      can be reasonably considered independent and separate works in themselves,
109      then this License, and its terms, do not apply to those sections when you
110      distribute them as separate works. But when you distribute the same
111      sections as part of a whole which is a work based on the Program, the
112      distribution of the whole must be on the terms of this License, whose
113      permissions for other licensees extend to the entire whole, and thus to
114      each and every part regardless of who wrote it.</P>
115      <P>Thus, it is not the intent of this section to claim rights or contest
116      your rights to work written entirely by you; rather, the intent is to
117      exercise the right to control the distribution of derivative or collective
118      works based on the Program.</P>
119      <P>In addition, mere aggregation of another work not based on the Program
120      with the Program (or with a work based on the Program) on a volume of a
121      storage or distribution medium does not bring the other work under the
122      scope of this License.</P>
123      <P><STRONG>3</STRONG>. You may copy and distribute the Program (or a work
124      based on it, under Section 2) in object code or executable form under the
125      terms of Sections 1 and 2 above provided that you also do one of the
126      following:</P>
127      <BLOCKQUOTE>
128        <P>a) Accompany it with the complete corresponding machine-readable
129        source code, which must be distributed under the terms of Sections 1 and
130        2 above on a medium customarily used for software interchange; or,</P>
131        <P>b) Accompany it with a written offer, valid for at least three years,
132        to give any third party, for a charge no more than your cost of
133        physically performing source distribution, a complete machine-readable
134        copy of the corresponding source code, to be distributed under the terms
135        of Sections 1 and 2 above on a medium customarily used for software
136        interchange; or,</P>
137        <P>c) Accompany it with the information you received as to the offer to
138        distribute corresponding source code. (This alternative is allowed only
139        for noncommercial distribution and only if you received the program in
140        object code or executable form with such an offer, in accord with
141        Subsection b above.)</P></BLOCKQUOTE>
142      <P>The source code for a work means the preferred form of the work for
143      making modifications to it. For an executable work, complete source code
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145      interface definition files, plus the scripts used to control compilation
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147      source code distributed need not include anything that is normally
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154      the source code from the same place counts as distribution of the source
155      code, even though third parties are not compelled to copy the source along
156      with the object code.</P>
157      <P><STRONG>4</STRONG>. You may not copy, modify, sublicense, or distribute
158      the Program except as expressly provided under this License. Any attempt
159      otherwise to copy, modify, sublicense or distribute the Program is void,
160      and will automatically terminate your rights under this License. However,
161      parties who have received copies, or rights, from you under this License
162      will not have their licenses terminated so long as such parties remain in
163      full compliance.</P>
164      <P><STRONG>5</STRONG>. You are not required to accept this License, since
165      you have not signed it. However, nothing else grants you permission to
166      modify or distribute the Program or its derivative works. These actions
167      are prohibited by law if you do not accept this License. Therefore, by
168      modifying or distributing the Program (or any work based on the Program),
169      you indicate your acceptance of this License to do so, and all its terms
170      and conditions for copying, distributing or modifying the Program or works
171      based on it.</P>
172      <P><STRONG>6</STRONG>. Each time you redistribute the Program (or any work
173      based on the Program), the recipient automatically receives a license from
174      the original licensor to copy, distribute or modify the Program subject to
175      these terms and conditions. You may not impose any further restrictions on
176      the recipients' exercise of the rights granted herein. You are not
177      responsible for enforcing compliance by third parties to this License.</P>
178      <P><STRONG>7</STRONG>. If, as a consequence of a court judgment or
179      allegation of patent infringement or for any other reason (not limited to
180      patent issues), conditions are imposed on you (whether by court order,
181      agreement or otherwise) that contradict the conditions of this License,
182      they do not excuse you from the conditions of this License. If you cannot
183      distribute so as to satisfy simultaneously your obligations under this
184      License and any other pertinent obligations, then as a consequence you may
185      not distribute the Program at all. For example, if a patent license would
186      not permit royalty-free redistribution of the Program by all those who
187      receive copies directly or indirectly through you, then the only way you
188      could satisfy both it and this License would be to refrain entirely from
189      distribution of the Program.</P>
190      <P>If any portion of this section is held invalid or unenforceable under
191      any particular circumstance, the balance of the section is intended to
192      apply and the section as a whole is intended to apply in other
193      circumstances.</P>
194      <P>It is not the purpose of this section to induce you to infringe any
195      patents or other property right claims or to contest validity of any such
196      claims; this section has the sole purpose of protecting the integrity of
197      the free software distribution system, which is implemented by public
198      license practices. Many people have made generous contributions to the
199      wide range of software distributed through that system in reliance on
200      consistent application of that system; it is up to the author/donor to
201      decide if he or she is willing to distribute software through any other
202      system and a licensee cannot impose that choice.</P>
203      <P>This section is intended to make thoroughly clear what is believed to
204      be a consequence of the rest of this License.</P>
205      <P><STRONG>8</STRONG>. If the distribution and/or use of the Program is
206      restricted in certain countries either by patents or by copyrighted
207      interfaces, the original copyright holder who places the Program under
208      this License may add an explicit geographical distribution limitation
209      excluding those countries, so that distribution is permitted only in or
210      among countries not thus excluded. In such case, this License incorporates
211      the limitation as if written in the body of this License.</P>
212      <P><STRONG>9</STRONG>. The Free Software Foundation may publish revised
213      and/or new versions of the General Public License from time to time. Such
214      new versions will be similar in spirit to the present version, but may
215      differ in detail to address new problems or concerns.</P>
216      <P>Each version is given a distinguishing version number. If the Program
217      specifies a version number of this License which applies to it and "any
218      later version", you have the option of following the terms and conditions
219      either of that version or of any later version published by the Free
220      Software Foundation. If the Program does not specify a version number of
221      this License, you may choose any version ever published by the Free
222      Software Foundation.</P>
223      <P><STRONG>10</STRONG>. If you wish to incorporate parts of the Program
224      into other free programs whose distribution conditions are different,
225      write to the author to ask for permission. For software which is
226      copyrighted by the Free Software Foundation, write to the Free Software
227      Foundation; we sometimes make exceptions for this. Our decision will be
228      guided by the two goals of preserving the free status of all derivatives
229      of our free software and of promoting the sharing and reuse of software
230      generally.</P>
231      <P><STRONG>NO WARRANTY</STRONG></P>
232      <P><STRONG>11</STRONG>. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE,
233      THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
234      APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
235      HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
236      OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
237      THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
238      PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
239      IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
240      ALL NECESSARY SERVICING, REPAIR OR CORRECTION.</P>
241      <P><STRONG>12</STRONG>. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR
242      AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY
243      MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO
244      YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
245      CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
246      PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED
247      INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE
248      PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER
249      PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.</P>
250      <P>END OF TERMS AND CONDITIONS</P><!-- START OF 'HOW TO APPLY' SECTION -->
251      <P><STRONG>How to Apply These Terms to Your New Programs</STRONG></P>
252      <P>If you develop a new program, and you want it to be of the greatest
253      possible use to the public, the best way to achieve this is to make it
254      free software which everyone can redistribute and change under these
255      terms.</P>
256      <P>To do so, attach the following notices to the program. It is safest to
257      attach them to the start of each source file to most effectively convey
258      the exclusion of warranty; and each file should have at least the
259      "copyright" line and a pointer to where the full notice is found.</P>
260      <BLOCKQUOTE>
261        <P>one line to give the program's name and a brief idea of what it
262        does.<br />Copyright (C) <YEAR><NAME author of></P>
263        <P>This program is free software; you can redistribute it and/or modify
264        it under the terms of the GNU General Public License as published by the
265        Free Software Foundation; either version 2 of the License, or (at your
266        option) any later version.</P>
267        <P>This program is distributed in the hope that it will be useful, but
268        WITHOUT ANY WARRANTY; without even the implied warranty of
269        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
270        Public License for more details.</P>
271        <P>You should have received a copy of the GNU General Public License
272        along with this program; if not, write to the Free Software Foundation,
273        Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
274      USA</P></BLOCKQUOTE>
275      <P>Also add information on how to contact you by electronic and paper
276      mail.</P>
277      <P>If the program is interactive, make it output a short notice like this
278      when it starts in an interactive mode:</P>
279      <BLOCKQUOTE>
280        <P>Gnomovision version 69, Copyright (C) year name of author Gnomovision
281        comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is
282        free software, and you are welcome to redistribute it under certain
283        conditions; type `show c' for details.</P></BLOCKQUOTE>
284      <P>The hypothetical commands `show w' and `show c' should show the
285      appropriate parts of the General Public License. Of course, the commands
286      you use may be called something other than `show w' and `show c'; they
287      could even be mouse-clicks or menu items--whatever suits your program.</P>
288      <P>You should also get your employer (if you work as a programmer) or your
289      school, if any, to sign a "copyright disclaimer" for the program, if
290      necessary. Here is a sample; alter the names:</P>
291      <BLOCKQUOTE>
292        <P>Yoyodyne, Inc., hereby disclaims all copyright interest <br />in the
293        program `Gnomovision' (which makes passes at compilers)<br />written by
294        James Hacker.</P>
295        <P>signature of Ty Coon, 1 April 1989<br />Ty Coon, President of
296      Vice</P></BLOCKQUOTE>
297      <P>This General Public License does not permit incorporating your program
298      into proprietary programs. If your program is a subroutine library, you
299      may consider it more useful to permit linking proprietary applications
300      with the library. If this is what you want to do, use the GNU Library
301      General Public License instead of this License.</P></TT></FONT><P>
302          <hr />
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