<appendix xmlns="http://docbook.org/ns/docbook" xml:id="appendix.gplv2">
  <title>The GNU General Public License, Version Two</title>
  <sect1 xml:id="sect.gplv2.the_gnu_general_public_license__version_two">
    <title>GNU GENERAL PUBLIC LICENSE</title>
    <subtitle>Version 2, June 1991</subtitle>
    <para>
      Copyright (C) 1989, 1991 Free Software Foundation, Inc. 59 Temple
      Place, Suite 330, Boston, MA 02111-1307 USA. 
    </para>
    <para>
      Everyone is permitted to copy and distribute verbatim copies of
      this license document, but changing it is not allowed.
    </para>
    <sect2 xml:id="sect.gplv2.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: (1) copyright the software,
	and (2) offer you this license which gives you legal permission to
	copy, distribute and/or modify the software.
      </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>
    </sect2>
    <sect2 xml:id="sect.gplv2.gnu_general_public_license">
      <title>GNU GENERAL PUBLIC LICENSE</title>
      <subtitle>TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND
      MODIFICATION</subtitle>
      <orderedlist startingnumber="0" numeration="arabic">
	<listitem>
	  <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
	    &quot;Program&quot;, below, refers to any such program or work,
	    and a &quot;work based on the Program&quot; 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 &quot;modification&quot;.)  Each licensee
	    is addressed as &quot;you&quot;.
	  </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>
	</listitem>
	<listitem>
	  <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>
	</listitem>
	<listitem>
	  <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 Section
	    1 above, provided that you also meet all of these conditions:
	  </para>
	  <orderedlist startingnumber="1" 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.  (Exception: 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>
	      <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>
	    </listitem>
	  </orderedlist>
	</listitem>
	<listitem>
	  <para>
	    You may copy and distribute the Program (or a work based on it,
	    under Section 2) in object code or executable form under the
	    terms of Sections 1 and 2 above provided that you also do one
	    of the following:
	  </para>
	  <orderedlist startingnumber="1" 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 1 and 2 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>
	    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>
	</listitem>
	<listitem>
	  <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>
	</listitem>
	<listitem>
	  <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>
	</listitem>
	<listitem>
	  <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>
	</listitem>
	<listitem>
	  <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>
	</listitem>
	<listitem>
	  <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>
	</listitem>
	<listitem>
	  <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>
	</listitem>
	<listitem>
	  <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>
	</listitem>
      </orderedlist>
    </sect2>
    <sect2 xml:id="sect.gplv2.no_warranty">
      <title>NO WARRANTY</title>
      <orderedlist startingnumber="11" numeration="arabic">
	<listitem>
	  <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 &quot;AS IS&quot;
	    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>
	</listitem>
	<listitem>
	  <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>
	</listitem>
      </orderedlist>
    </sect2>
    <sect2 xml:id="sect.gplv2.end_of_terms_and_conditions">
      <title>END OF TERMS AND CONDITIONS</title>
    </sect2>
  </sect1>
  <sect1 xml:id="sect.gplv2.how_to_apply_these_terms_to_your_new_programs">
    <title>How to Apply These Terms to Your New Programs</title>
    <para>
       If you develop a new program, and you want it to be of the greatest
       possible use to the public, the best way to achieve this is to make
       it free software which everyone can redistribute and change under
       these terms.
    </para>
    <para>
      To do so, attach the following notices to the program.  It is safest
      to attach them to the start of each source file to most effectively
      convey the exclusion of warranty; and each file should have at least
      the "copyright" line and a pointer to where the full notice is found.
    </para>
    <sect2 xml:id="sect.gplv2.example">
      <para>
	<literallayout>
	  &lt;one line to give the program's name and a brief idea of what it does.&gt;
	  Copyright (C) &lt;year&gt;  &lt;name of author&gt;
	</literallayout>
      </para>
      <para>
	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.
      </para>
      <para>
	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.
      </para>
      <para>
	You should have received a copy of the GNU General Public License
	along with this program; if not, write to the Free Software
	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
	USA
      </para>
    </sect2>
    <para>
      Also add information on how to contact you by electronic and paper mail.
    </para>
    <para>
      If the program is interactive, make it output a short notice like this
      when it starts in an interactive mode:
    </para>
    <para>
      <literallayout>
	Gnomovision version 69, Copyright (C) year  name of author
	Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
	This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
      </literallayout>
    </para>
    <para>
      The hypothetical commands `show w' and `show c' should show the
      appropriate parts of the General Public License.  Of course, the
      commands you use may be called something other than `show w' and
      `show c'; they could even be mouse-clicks or menu items --whatever
      suits your program.
    </para>
    <para>
      You should also get your employer (if you work as a programmer) or
      your school, if any, to sign a "copyright disclaimer" for the program,
      if necessary.  Here is a sample; alter the names:
    </para>
    <sect2 xml:id="sect.gplv2.example2">
      <para>
	Yoyodyne, Inc., hereby disclaims all copyright interest in the program
	`Gnomovision' (which makes passes at compilers) written by James Hacker.
      </para>
      <literallayout>
	&lt;signature of Ty Coon&gt;, 1 April 1989
	Ty Coon, President of Vice
      </literallayout>
    </sect2>
    <para>
      This General Public License does not permit incorporating your
      program into proprietary programs.  If your program is a subroutine
      library, you may consider it more useful to permit linking proprietary
      applications with the library.  If this is what you want to do, use
      the GNU Library General Public License instead of this License.
    </para>
  </sect1>
</appendix>
