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<!-- $Id: apx-gpl.sgml,v 1.2 2003/08/08 21:57:43 olea Exp $ -->
<!-- Este fichero no se traduce -->

<appendix id="apx-gpl" lang="en">
<title>GNU General Public License</title>
<para>
Copyright (c) 2000 Free Software Foundation, Inc.
         <address>Free Software Foundation, Inc. 
           <street>59 Temple Place, Suite 330</street>, 
           <city>Boston</city>, 
           <state>MA</state> <postcode>02111-1307</postcode>
           <country>USA</country>
         </address>.
       </para>

<para>
This is version 2 
</para>

       <para>
        Everyone is permitted to copy and distribute verbatim copies
        of this license document, but changing it is not allowed.
      </para>
   

    <sect1 id="preamble">
      <title>Preamble</title>
      
      <para>
        The licenses for most software are designed to take away your 
        freedom to share and change it. By contrast, the GNU General Public 
        License is intended to guarantee your freedom to share and change 
        free software - to make sure the software is free for all its users. 
        This General Public License applies to most of the Free Software 
        Foundation's software and to any other program whose authors commit 
        to using it. (Some other Free Software Foundation software is covered 
        by the GNU Library General Public License instead.) You can apply it 
        to your programs, too.
      </para>
  
      <para>
        When we speak of free software, we are referring to freedom, not price. 
        Our General Public Licenses are designed to make sure that you have the 
        freedom to distribute copies of free software (and charge for this 
        service if you wish), that you receive source code or can get it if you 
        want it, that you can change the software or use pieces of it in new free 
        programs; and that you know you can do these things.
      </para>
  
      <para>
        To protect your rights, we need to make restrictions that forbid anyone 
        to deny you these rights or to ask you to surrender the rights. These 
        restrictions translate to certain responsibilities for you if you distribute 
        copies of the software, or if you modify it.
      </para>
  
      <para>
        For example, if you distribute copies of such a program, whether gratis or 
        for a fee, you must give the recipients all the rights that you have. You 
        must make sure that they, too, receive or can get the source code. And you 
        must show them these terms so they know their rights.
      </para>
  
      <para>
        We protect your rights with two steps:
  
        <orderedlist numeration="arabic">
          <listitem>
            <para>
              copyright the software, and
            </para>
          </listitem>
          <listitem>
            <para>
              offer you this license which gives you legal permission to copy, 
              distribute and/or modify the software.
            </para>
          </listitem>
        </orderedlist>
      </para>
 
     <para>
       Also, for each author's protection and ours, we want to make certain that 
       everyone understands that there is no warranty for this free software. If 
       the software is modified by someone else and passed on, we want its 
       recipients to know that what they have is not the original, so that any 
       problems introduced by others will not reflect on the original authors' 
       reputations.
     </para>
 
     <para>
       Finally, any free program is threatened constantly by software patents. 
       We wish to avoid the danger that redistributors of a free program will 
       individually obtain patent licenses, in effect making the program 
       proprietary. To prevent this, we have made it clear that any patent must be 
       licensed for everyone's free use or not licensed at all.
     </para>
 
     <para>
       The precise terms and conditions for copying, distribution and modification 
       follow.
     </para>
 
   </sect1>
 
   <sect1 id="terms">
     <title>TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION</title>
 
     <sect2 id="sect0">
       <title>Section 0</title>
       <para>
         This License applies to any program or other work which contains a notice 
         placed by the copyright holder saying it may be distributed under the terms 
         of this General Public License. The "Program", below, refers to any such 
         program or work, and a <quote>work based on the Program</quote> means either 
         the Program or any derivative work under copyright law: that is to say, a 
         work containing the Program or a portion of it, either verbatim or with 
         modifications and/or translated into another language. (Hereinafter, translation 
         is included without limitation in the term <quote>modification</quote>.) Each 
         licensee is addressed as <quote>you</quote>.
       </para>
 
       <para>
         Activities other than copying, distribution and modification are not covered by 
         this License; they are outside its scope. The act of running the Program is not 
         restricted, and the output from the Program is covered only if its contents 
         constitute a work based on the Program (independent of having been made by running 
         the Program). Whether that is true depends on what the Program does.
       </para>
     </sect2>
 
     <sect2 id="sect1">
       <title>Section 1</title>
       <para>
         You may copy and distribute verbatim copies of the Program's source code as you 
         receive it, in any medium, provided that you conspicuously and appropriately 
         publish on each copy an appropriate copyright notice and disclaimer of warranty; 
         keep intact all the notices that refer to this License and to the absence of any 
         warranty; and give any other recipients of the Program a copy of this License 
         along with the Program.
       </para>
       
       <para>
         You may charge a fee for the physical act of transferring a copy, and you may at 
         your option offer warranty protection in exchange for a fee.
       </para>
     </sect2>
 
     <sect2 id="sect2">
       <title>Section 2</title>
       <para>
         You may modify your copy or copies of the Program or any portion of it, thus 
         forming a work based on the Program, and copy and distribute such modifications 
         or work under the terms of <link linkend="sect1">Section 1</link> above, provided 
         that you also meet all of these conditions:
 
         <orderedlist numeration="loweralpha">
           <listitem>
             <para>
               You must cause the modified files to carry prominent notices stating that 
               you changed the files and the date of any change.
             </para>
           </listitem>
           <listitem>
             <para>
               You must cause any work that you distribute or publish, that in whole or 
               in part contains or is derived from the Program or any part thereof, to be 
               licensed as a whole at no charge to all third parties under the terms of 
               this License.
             </para>
           </listitem>
           <listitem>
             <para>
               If the modified program normally reads commands interactively when run, you 
               must cause it, when started running for such interactive use in the most 
               ordinary way, to print or display an announcement including an appropriate 
               copyright notice and a notice that there is no warranty (or else, saying 
               that you provide a warranty) and that users may redistribute the program 
               under these conditions, and telling the user how to view a copy of this 
               License. 
 
               <note>
                 <title>Exception:</title>
                 <para>
                   If the Program itself is interactive but does not normally print such an 
                   announcement, your work based on the Program is not required to print an 
                   announcement.) 
                 </para>
               </note>
 
             </para>
           </listitem>
         </orderedlist>
       </para>
 
       <para>
         These requirements apply to the modified work as a whole. If identifiable sections 
         of that work are not derived from the Program, and can be reasonably considered 
         independent and separate works in themselves, then this License, and its terms, 
         do not apply to those sections when you distribute them as separate works. But when 
         you distribute the same sections as part of a whole which is a work based on the 
         Program, the distribution of the whole must be on the terms of this License, whose 
         permissions for other licensees extend to the entire whole, and thus to each and 
         every part regardless of who wrote it.
       </para>
 
       <para>
         Thus, it is not the intent of this section to claim rights or contest your rights 
         to work written entirely by you; rather, the intent is to exercise the right to control 
         the distribution of derivative or collective works based on the Program.
       </para>
 
       <para>
         In addition, mere aggregation of another work not based on the Program with the Program 
         (or with a work based on the Program) on a volume of a storage or distribution medium 
         does not bring the other work under the scope of this License.
       </para>
     </sect2>
 
     <sect2 id="sect3">
       <title>Section 3</title>
 
       <para>
         You may copy and distribute the Program (or a work based on it, under 
         <link linkend="sect2">Section 2</link> in object code or executable form under the terms of 
         <link linkend="sect1">Sections 1</link> and <link linkend="sect2">2</link> above provided that 
         you also do one of the following:
 
         <orderedlist numeration="loweralpha">
           <listitem>
             <para>
               Accompany it with the complete corresponding machine-readable source code, which 

               must be distributed under the terms of Sections 1 and 2 above on a medium 
               customarily used for software interchange; or,
             </para>
           </listitem>
           <listitem>
             <para>
               Accompany it with a written offer, valid for at least three years, to give any 
               third party, for a charge no more than your cost of physically performing source 
               distribution, a complete machine-readable copy of the corresponding source code, 
               to be distributed under the terms of Sections  and  above on a medium customarily 
               used for software interchange; or,
             </para>
           </listitem>
           <listitem>
             <para>
               Accompany it with the information you received as to the offer to distribute 
               corresponding source code. (This alternative is allowed only for noncommercial 
               distribution and only if you received the program in object code or executable form 
               with such an offer, in accord with Subsection b above.)
             </para>
           </listitem>
         </orderedlist>
       </para>
 
       <para>
         The source code for a work means the preferred form of the work for making modifications 
         to it. For an executable work, complete source code means all the source code for all modules 
         it contains, plus any associated interface definition files, plus the scripts used to control 
         compilation and installation of the executable. However, as a special exception, the source 
         code distributed need not include anything that is normally distributed (in either source or 
         binary form) with the major components (compiler, kernel, and so on) of the operating system 
         on which the executable runs, unless that component itself accompanies the executable.
       </para>
       
       <para>
         If distribution of executable or object code is made by offering access to copy from a 
         designated place, then offering equivalent access to copy the source code from the same place 
         counts as distribution of the source code, even though third parties are not compelled to 
         copy the source along with the object code.
       </para>
     </sect2>
 
     <sect2 id="sect4">
       <title>Section 4</title>
       
       <para>
         You may not copy, modify, sublicense, or distribute the Program except as expressly provided 
         under this License. Any attempt otherwise to copy, modify, sublicense or distribute the 
         Program is void, and will automatically terminate your rights under this License. However, 
         parties who have received copies, or rights, from you under this License will not have their 
         licenses terminated so long as such parties remain in full compliance.
       </para>
     </sect2>
 
     <sect2 id="sect5">
       <title>Section 5</title>
 
       <para>
         You are not required to accept this License, since you have not signed it. However, nothing 
         else grants you permission to modify or distribute the Program or its derivative works. 
         These actions are prohibited by law if you do not accept this License. Therefore, by modifying 
         or distributing the Program (or any work based on the Program), you indicate your acceptance 
         of this License to do so, and all its terms and conditions for copying, distributing or 
         modifying the Program or works based on it.
       </para>
     </sect2>
 
     <sect2 id="sect6">
       <title>Section 6</title>
 
       <para>
         Each time you redistribute the Program (or any work based on the Program), the recipient 
         automatically receives a license from the original licensor to copy, distribute or modify 
         the Program subject to these terms and conditions. You may not impose any further restrictions 
         on the recipients' exercise of the rights granted herein. You are not responsible for enforcing 
         compliance by third parties to this License.
       </para>
     </sect2>
 
     <sect2 id="sect7">
       <title>Section 7</title>
 
       <para>
         If, as a consequence of a court judgment or allegation of patent infringement or for any other 
         reason (not limited to patent issues), conditions are imposed on you (whether by court order, 
         agreement or otherwise) that contradict the conditions of this License, they do not excuse you 
         from the conditions of this License. If you cannot distribute so as to satisfy simultaneously 
         your obligations under this License and any other pertinent obligations, then as a consequence 
         you may not distribute the Program at all. For example, if a patent license would not permit 
         royalty-free redistribution of the Program by all those who receive copies directly or 
         indirectly through you, then the only way you could satisfy both it and this License would be 
         to refrain entirely from distribution of the Program.
       </para>
 
       <para>
         If any portion of this section is held invalid or unenforceable under any particular circumstance, 
         the balance of the section is intended to apply and the section as a whole is intended to apply 
         in other circumstances.
       </para>
 
       <para>
         It is not the purpose of this section to induce you to infringe any patents or other property 
         right claims or to contest validity of any such claims; this section has the sole purpose of 
         protecting the integrity of the free software distribution system, which is implemented by public 
         license practices. Many people have made generous contributions to the wide range of software 
         distributed through that system in reliance on consistent application of that system; it is up 
         to the author/donor to decide if he or she is willing to distribute software through any other 
         system and a licensee cannot impose that choice.
       </para>
 
       <para>
         This section is intended to make thoroughly clear what is believed to be a consequence of the 
         rest of this License.
       </para>
     </sect2>
 
     <sect2 id="sect8">
       <title>Section 8</title>
 
       <para>
         If the distribution and/or use of the Program is restricted in certain countries either by patents 
         or by copyrighted interfaces, the original copyright holder who places the Program under this License 
         may add an explicit geographical distribution limitation excluding those countries, so that 
         distribution is permitted only in or among countries not thus excluded. In such case, this License 
         incorporates the limitation as if written in the body of this License.
       </para>
     </sect2>
 
     <sect2 id="sect9">
       <title>Section 9</title>
       
       <para>
         The Free Software Foundation may publish revised and/or new versions of the General Public License 
         from time to time. Such new versions will be similar in spirit to the present version, but may differ 
         in detail to address new problems or concerns.
       </para>
 
       <para>
         Each version is given a distinguishing version number. If the Program specifies a version number of 
         this License which applies to it and "any later version", you have the option of following the terms 
         and conditions either of that version or of any later version published by the Free Software 
         Foundation. If the Program does not specify a version number of this License, you may choose any 
         version ever published by the Free Software Foundation.
       </para>
     </sect2>
 
     <sect2 id="sect10">
       <title>Section 10</title>
 
       <para>
         If you wish to incorporate parts of the Program into other free programs whose distribution 
         conditions are different, write to the author to ask for permission. For software which is copyrighted 
         by the Free Software Foundation, write to the Free Software Foundation; we sometimes make exceptions 
         for this. Our decision will be guided by the two goals of preserving the free status of all 
         derivatives of our free software and of promoting the sharing and reuse of software generally.
       </para>
     </sect2>
 
  <sect2 id="sect11">
       <title>NO WARRANTY</title>
       <subtitle>Section 11</subtitle>
 
       <para>
         BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT 
         PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR 
         OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, 
         INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
         PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE 
         PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
       </para>
     </sect2>
 
     <sect2 id="sect12">
       <title>Section 12</title>
 
       <para>
         IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR 
         ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU 
         FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 
         USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED 
         INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH 
         ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 
         DAMAGES.
       </para>
     </sect2>
   </sect1>
 </appendix>