path: root/support/shlatex/GPL.TXT

                    GNU GENERAL PUBLIC LICENSE
                        Version 2, June 1991

 Copyright (C) 1989, 1991 Free Software Foundation, Inc.
                59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.

                      Preamble

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  The  precise  terms  and conditions  for  copying,  distribution and
modification follow.

                    GNU GENERAL PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

  0. 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 "work based on the  Program"
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 "modification".)  Each licensee is addressed as "you".

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.

  1. 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.

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.

  2. 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:

    a) You must  cause the modified  files to carry  prominent notices
    stating that you changed the files and the date of any change.

    b) 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.

    c) 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.)

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.

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.

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.

  3. 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:

    a) 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,

    b) 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,

    c) 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.)

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.

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.

  4. 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.

  5. 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.

  6. 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.

  7. 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.

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.

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.

This section is intended to make thoroughly clear what is believed  to
be a consequence of the rest of this License.

  8. 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.

  9.  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.

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.

  10. 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.

                            NO WARRANTY

  11. 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.

  12. 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.

                     END OF TERMS AND CONDITIONS