Package: perl / 5.20.2-3+deb8u11

Header

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/

Upstream-Name: perl

Source: http://www.perl.com/CPAN/src/5.0/

Comment: This package was debianized by Brendan O'Dea <bod@debian.org> on Thu, 17 Aug 2000 16:10:54 +1000. . Upstream Authors: . Larry Wall et. al. (see /usr/share/doc/perl/AUTHORS). . Last checked against: Perl 5.20.2

Licenses

License: LGPL-2.1

On Debian GNU/Linux systems, the complete text of the LGPL 2.1
license can be found in `/usr/share/common-licenses/LGPL-2.1'. 

License: GPL-1+

On Debian GNU/Linux systems, the complete text of the GNU General
Public License can be found in `/usr/share/common-licenses/GPL-1'. 

License: Artistic

On Debian GNU/Linux systems, the complete text of the
Artistic Licence can be found in `/usr/share/common-licenses/Artistic'. 

License: Artistic-2

Copyright (c) 2000-2006, The Perl Foundation.

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

Preamble

This license establishes the terms under which a given free software
Package may be copied, modified, distributed, and/or redistributed.
The intent is that the Copyright Holder maintains some artistic
control over the development of that Package while still keeping the
Package available as open source and free software.

You are always permitted to make arrangements wholly outside of this
license directly with the Copyright Holder of a given Package. If the
terms of this license do not permit the full use that you propose to
make of the Package, you should contact the Copyright Holder and seek
a different licensing arrangement.

Definitions

"Copyright Holder" means the individual(s) or organization(s) named in
the copyright notice for the entire Package.

"Contributor" means any party that has contributed code or other
material to the Package, in accordance with the Copyright Holder's
procedures.

"You" and "your" means any person who would like to copy, distribute,
or modify the Package.

"Package" means the collection of files distributed by the Copyright
Holder, and derivatives of that collection and/or of those files. A
given Package may consist of either the Standard Version, or a
Modified Version.

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accessible to anyone else, or in the case of a company or
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"Standard Version" refers to the Package if it has not been modified,
or has been modified only in ways explicitly requested by the
Copyright Holder.

"Modified Version" means the Package, if it has been changed, and such
changes were not explicitly requested by the Copyright Holder.

"Original License" means this Artistic License as Distributed with the
Standard Version of the Package, in its current version or as it may
be modified by The Perl Foundation in the future.

"Source" form means the source code, documentation source, and
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Permission for Use and Modification Without Distribution

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Permissions for Redistribution of the Standard Version

(2) You may Distribute verbatim copies of the Source form of the
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either gratis or for a Distributor Fee, provided that you duplicate
all of the original copyright notices and associated disclaimers. At
your discretion, such verbatim copies may or may not include a
Compiled form of the Package.

(3) You may apply any bug fixes, portability changes, and other
modifications made available from the Copyright Holder. The resulting
Package will still be considered the Standard Version, and as such
will be subject to the Original License.

Distribution of Modified Versions of the Package as Source

(4) You may Distribute your Modified Version as Source (either gratis
or for a Distributor Fee, and with or without a Compiled form of the
Modified Version) provided that you clearly document how it differs
from the Standard Version, including, but not limited to, documenting
any non-standard features, executables, or modules, and provided that
you do at least ONE of the following:

(a) make the Modified Version available to the Copyright Holder of the
Standard Version, under the Original License, so that the Copyright
Holder may include your modifications in the Standard Version. (b)
ensure that installation of your Modified Version does not prevent the
user installing or running the Standard Version. In addition, the
Modified Version must bear a name that is different from the name of
the Standard Version. (c) allow anyone who receives a copy of the
Modified Version to make the Source form of the Modified Version
available to others under (i) the Original License or (ii) a license
that permits the licensee to freely copy, modify and redistribute the
Modified Version using the same licensing terms that apply to the copy
that the licensee received, and requires that the Source form of the
Modified Version, and of any works derived from it, be made freely
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allowed.

Distribution of Compiled Forms of the Standard Version or Modified
Versions without the Source

(5) You may Distribute Compiled forms of the Standard Version without
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get the Source of the Standard Version. Such instructions must be
valid at the time of your distribution. If these instructions, at any
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must provide new instructions on demand or cease further distribution.
If you provide valid instructions or cease distribution within thirty
days after you become aware that the instructions are invalid, then
you do not forfeit any of your rights under this license.

(6) You may Distribute a Modified Version in Compiled form without the
Source, provided that you comply with Section 4 with respect to the
Source of the Modified Version.

Aggregating or Linking the Package

(7) You may aggregate the Package (either the Standard Version or
Modified Version) with other packages and Distribute the resulting
aggregation provided that you do not charge a licensing fee for the
Package. Distributor Fees are permitted, and licensing fees for other
components in the aggregation are permitted. The terms of this license
apply to the use and Distribution of the Standard or Modified Versions
as included in the aggregation.

(8) You are permitted to link Modified and Standard Versions with
other works, to embed the Package in a larger work of your own, or to
build stand-alone binary or bytecode versions of applications that
include the Package, and Distribute the result without restriction,
provided the result does not expose a direct interface to the Package.

Items That are Not Considered Part of a Modified Version

(9) Works (including, but not limited to, modules and scripts) that
merely extend or make use of the Package, do not, by themselves, cause
the Package to be a Modified Version. In addition, such works are not
considered parts of the Package itself, and are not subject to the
terms of this license.

General Provisions

(10) Any use, modification, and distribution of the Standard or
Modified Versions is governed by this Artistic License. By using,
modifying or distributing the Package, you accept this license. Do not
use, modify, or distribute the Package, if you do not accept this
license.

(11) If your Modified Version has been derived from a Modified Version
made by someone other than you, you are nevertheless required to
ensure that your Modified Version complies with the requirements of
this license.

(12) This license does not grant you the right to use any trademark,
service mark, tradename, or logo of the Copyright Holder.

(13) This license includes the non-exclusive, worldwide,
free-of-charge patent license to make, have made, use, offer to sell,
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patent claims licensable by the Copyright Holder that are necessarily
infringed by the Package. If you institute patent litigation
(including a cross-claim or counterclaim) against any party alleging
that the Package constitutes direct or contributory patent
infringement, then this Artistic License to you shall terminate on the
date that such litigation is filed.

(14) Disclaimer of Warranty: THE PACKAGE IS PROVIDED BY THE COPYRIGHT
HOLDER AND CONTRIBUTORS "AS IS' AND WITHOUT ANY EXPRESS OR IMPLIED
WARRANTIES. THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED TO THE EXTENT
PERMITTED BY YOUR LOCAL LAW. UNLESS REQUIRED BY LAW, NO COPYRIGHT
HOLDER OR CONTRIBUTOR WILL BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING IN ANY WAY OUT OF THE USE
OF THE PACKAGE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

License: BZIP

 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions
 are met:
 .
 1. Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.
 .
 2. The origin of this software must not be misrepresented; you must
    not claim that you wrote the original software.  If you use this
    software in a product, an acknowledgment in the product
    documentation would be appreciated but is not required.
 .
 3. Altered source versions must be plainly marked as such, and must
    not be misrepresented as being the original software.
 .
 4. The name of the author may not be used to endorse or promote
    products derived from this software without specific prior written
    permission.
 .
 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
 OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .
 Julian Seward, jseward@bzip.org
 bzip2/libbzip2 version 1.0.5 of 10 December 2007 

License: ZLIB

 This software is provided 'as-is', without any express or implied
 warranty.  In no event will the authors be held liable for any damages
 arising from the use of this software.
 .
 Permission is granted to anyone to use this software for any purpose,
 including commercial applications, and to alter it and redistribute it
 freely, subject to the following restrictions:
 .
 1. The origin of this software must not be misrepresented; you must not
    claim that you wrote the original software. If you use this software
    in a product, an acknowledgment in the product documentation would be
    appreciated but is not required.
 2. Altered source versions must be plainly marked as such, and must not be
    misrepresented as being the original software.
 3. This notice may not be removed or altered from any source distribution. 

License: Expat

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE. 

License: BSD-4-clause

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.
4. Neither the name of the University nor the names of its contributors
   may be used to endorse or promote products derived from this software
   without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE. 
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer
   in the documentation and/or other materials provided with the
   distribution.
3. All advertising materials mentioning features or use of this
   software must display the following acknowledgement:
     This product includes software developed by Powerdog Industries.
4. The name of Powerdog Industries may not be used to endorse or
   promote products derived from this software without specific prior
   written permission.

THIS SOFTWARE IS PROVIDED BY POWERDOG INDUSTRIES ``AS IS'' AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE POWERDOG INDUSTRIES BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

License: Unicode

 EXHIBIT 1
 UNICODE, INC. LICENSE AGREEMENT - DATA FILES AND SOFTWARE

  Unicode Data Files include all data files under the directories
  http://www.unicode.org/Public/, http://www.unicode.org/reports/,
  and http://www.unicode.org/cldr/data/ . Unicode Data Files
  do not include PDF online code charts under the directory
  http://www.unicode.org/Public/. Software includes any
  source code published in the Unicode Standard or under the directories
  http://www.unicode.org/Public/, http://www.unicode.org/reports/,
  and http://www.unicode.org/cldr/data/.

     NOTICE TO USER: Carefully read the following legal agreement. BY
     DOWNLOADING, INSTALLING, COPYING OR OTHERWISE USING UNICODE
     INC.'S DATA FILES ("DATA FILES"), AND/OR SOFTWARE ("SOFTWARE"), YOU
     UNEQUIVOCALLY ACCEPT, AND AGREE TO BE BOUND BY, ALL OF THE TERMS AND
     CONDITIONS OF THIS AGREEMENT. IF YOU DO NOT AGREE, DO NOT DOWNLOAD,
     INSTALL, COPY, DISTRIBUTE OR USE THE DATA FILES OR SOFTWARE.

     COPYRIGHT AND PERMISSION NOTICE

     Copyright © 1991-2011 Unicode, Inc. All rights
     reserved. Distributed under the Terms of Use in
     http://www.unicode.org/copyright.html.

     Permission is hereby granted, free of charge, to any person
     obtaining a copy of the Unicode data files and any associated
     documentation (the "Data Files") or Unicode software and any
     associated documentation (the "Software") to deal in the Data Files
     or Software without restriction, including without limitation
     the rights to use, copy, modify, merge, publish, distribute,
     and/or sell copies of the Data Files or Software, and to permit
     persons to whom the Data Files or Software are furnished to do so,
     provided that (a) the above copyright notice(s) and this permission
     notice appear with all copies of the Data Files or Software,
     (b) both the above copyright notice(s) and this permission notice
     appear in associated documentation, and (c) there is clear notice
     in each modified Data File or in the Software as well as in the
     documentation associated with the Data File(s) or Software that
     the data or software has been modified.

     THE DATA FILES AND SOFTWARE ARE PROVIDED "AS IS", WITHOUT WARRANTY
     OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
     WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
     AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE
     COPYRIGHT HOLDER OR HOLDERS INCLUDED IN THIS NOTICE BE LIABLE
     FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES,
     OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
     PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
     TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
     PERFORMANCE OF THE DATA FILES OR SOFTWARE.

     Except as contained in this notice, the name of a copyright holder
     shall not be used in advertising or otherwise to promote the sale,
     use or other dealings in these Data Files or Software without
     prior written authorization of the copyright holder. 
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.
3. The names of the authors may not be used to endorse or promote
   products derived from this software without specific prior written
   permission.

THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE. 

License: BSD-3-clause

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.
3. Neither the name of the University nor the names of its contributors
   may be used to endorse or promote products derived from this software
   without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE. 

License: REGCOMP

 Permission is granted to anyone to use this software for any
 purpose on any computer system, and to redistribute it freely,
 subject to the following restrictions:

 1. The author is not responsible for the consequences of use of
         this software, no matter how awful, even if they arise
         from defects in it.

 2. The origin of this software must not be misrepresented, either
         by explicit claim or by omission.

 3. Altered versions must be plainly marked as such, and must not
         be misrepresented as being the original software. 

License: TEXT-TABS

This module may be modified, used, copied, and redistributed at your own risk.

Although allowed by the preceding license, please do not publicly
redistribute modified versions of this code with the name "Text::Tabs"
unless it passes the unmodified Text::Tabs test suite. 

License: S2P

This program is free and open software. You may use, modify,
distribute, and sell this program (and any modified variants) in any
way you wish, provided you do not restrict others from doing the same. 

License: DONT-CHANGE-THE-GPL

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

License: SDBM-PUBLIC-DOMAIN

From ext/SDBM_File/sdbm/README:

 The entire sdbm  library package, as authored by me, Ozan S.  Yigit,
 is  hereby placed in the public domain. As such, the author is not
 responsible for the  consequences  of  use  of this  software, no
 matter how awful, even if they arise from defects in it. There is no
 expressed or implied warranty for the sdbm library.

 Since the sdbm library package is in the public domain, this   original
 release  or  any  additional  public-domain releases of the modified
 original cannot possibly (by definition) be withheld from you. Also
 by definition, You (singular) have all the rights to this code
 (including  the  right to sell without permission, the right to
 hoard[3]  and  the right  to  do  other  icky  things as you see fit)
 but those rights are also granted to everyone else.

 Please note that all  previous  distributions  of  this software
 contained  a  copyright  (which is now dropped) to protect its origins
 and its  current  public  domain  status against any possible claims
 and/or challenges. 
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 3 of the License, or
(at your option) any later version.

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.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

As a special exception, you may create a larger work that contains
part or all of the Bison parser skeleton and distribute that work
under terms of your choice, so long as that work isn't itself a
parser generator using the skeleton or a modified version thereof
as a parser skeleton.  Alternatively, if you modify or redistribute
the parser skeleton itself, you may (at your option) remove this
special exception, which will cause the skeleton and the resulting
Bison output files to be licensed under the GNU General Public
License without this special exception.

This special exception was added by the Free Software Foundation in
version 2.2 of Bison. 

License: HSIEH-DERIVATIVE

The derivative content includes raw computer source code, ideas,
opinions, and excerpts whose original source is covered under another
license and transformations of such derivatives. Note that mere excerpts
by themselves (with the exception of raw source code) are not considered
derivative works under this license. Use and redistribution is limited
to the following conditions:

   One may not create a derivative work which, in any way, violates the
   Paul Hsieh exposition license described above on the original content.

   One may not apply a license to a derivative work that precludes
   anyone else from using and redistributing derivative content.

   One may not attribute any derivative content to authors not involved
   in the creation of the content, though an attribution to the author
   is not necessary. 

License: HSIEH-BSD

Copyright (c) 2010, Paul Hsieh
All rights reserved.
. 
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:

    Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.

    Redistributions in binary form must reproduce the above copyright
    notice, this list of conditions and the following disclaimer in the
    documentation and/or other materials provided with the distribution.

    Neither my name, Paul Hsieh, nor the names of any other contributors
    to the code use may not be used to endorse or promote products
    derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.