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Terms of Perl itself
a) the GNU General Public License as published by the Free
Software Foundation; either version 1, or (at your option) any
later version, or
b) the "Artistic License"
The General Public License (GPL)
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc. 675 Mass Ave,
Cambridge, MA 02139, USA. Everyone is permitted to copy and distribute
verbatim copies of this license document, but changing it is not allowed.
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
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To protect your rights, we need to make restrictions that forbid anyone to deny
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We protect your rights with two steps: (1) copyright the software, and (2) offer
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The precise terms and conditions for copying, distribution and modification
GNU GENERAL PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND
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
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or work, and a "work based on the Program" means either the Program or any
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the term "modification".) Each licensee is addressed as "you".
Activities other than copying, distribution and modification are not covered by
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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
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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
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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
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and its terms, do not apply to those sections when you distribute them as
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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
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above provided that you also do one of the following:
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expressly provided under this License. Any attempt otherwise to copy, modify,
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or its derivative works. These actions are prohibited by law if you do not accept
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distribute or modify the Program subject to these terms and conditions. You
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or for any other reason (not limited to patent issues), conditions are imposed on
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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
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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.
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General Public License from time to time. Such new versions will be similar in
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Each version is given a distinguishing version number. If the Program specifies a
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any later version published by the Free Software Foundation. If the Program does
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Our decision will be guided by the two goals of preserving the free status of all
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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
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
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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
The Artistic License
The intent of this document is to state the conditions under which a Package
may be copied, such that the Copyright Holder maintains some semblance of
artistic control over the development of the package, while giving the users of the
package the right to use and distribute the Package in a more-or-less customary
fashion, plus the right to make reasonable modifications.
- "Package" refers to the collection of files distributed by the Copyright
Holder, and derivatives of that collection of files created through textual
- "Standard Version" refers to such a Package if it has not been modified,
or has been modified in accordance with the wishes of the Copyright
- "Copyright Holder" is whoever is named in the copyright or copyrights for
- "You" is you, if you're thinking about copying or distributing this Package.
- "Reasonable copying fee" is whatever you can justify on the basis of
media cost, duplication charges, time of people involved, and so on. (You
will not be required to justify it to the Copyright Holder, but only to the
computing community at large as a market that must bear the fee.)
- "Freely Available" means that no fee is charged for the item itself, though
there may be fees involved in handling the item. It also means that
recipients of the item may redistribute it under the same conditions they
1. You may make and give away verbatim copies of the source form of the
Standard Version of this Package without restriction, provided that you duplicate
all of the original copyright notices and associated disclaimers.
2. You may apply bug fixes, portability fixes and other modifications derived from
the Public Domain or from the Copyright Holder. A Package modified in such a
way shall still be considered the Standard Version.
3. You may otherwise modify your copy of this Package in any way, provided
that you insert a prominent notice in each changed file stating how and when
you changed that file, and provided that you do at least ONE of the following:
a) place your modifications in the Public Domain or otherwise
make them Freely Available, such as by posting said modifications
to Usenet or an equivalent medium, or placing the modifications on
a major archive site such as ftp.uu.net, or by allowing the
Copyright Holder to include your modifications in the Standard
Version of the Package.
b) use the modified Package only within your corporation or
c) rename any non-standard executables so the names do not
conflict with standard executables, which must also be provided,
and provide a separate manual page for each non-standard
executable that clearly documents how it differs from the Standard
d) make other distribution arrangements with the Copyright Holder.
4. You may distribute the programs of this Package in object code or executable
form, provided that you do at least ONE of the following:
a) distribute a Standard Version of the executables and library
files, together with instructions (in the manual page or equivalent)
on where to get the Standard Version.
b) accompany the distribution with the machine-readable source of
the Package with your modifications.
c) accompany any non-standard executables with their
corresponding Standard Version executables, giving the
non-standard executables non-standard names, and clearly
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together with instructions on where to get the Standard Version.
d) make other distribution arrangements with the Copyright Holder.
5. You may charge a reasonable copying fee for any distribution of this Package.
You may charge any fee you choose for support of this Package. You may not
charge a fee for this Package itself. However, you may distribute this Package in
aggregate with other (possibly commercial) programs as part of a larger
(possibly commercial) software distribution provided that you do not advertise
this Package as a product of your own.
6. The scripts and library files supplied as input to or produced as output from
the programs of this Package do not automatically fall under the copyright of this
Package, but belong to whomever generated them, and may be sold
commercially, and may be aggregated with this Package.
7. C or perl subroutines supplied by you and linked into this Package shall not
be considered part of this Package.
8. Aggregation of this Package with a commercial distribution is always permitted
provided that the use of this Package is embedded; that is, when no overt attempt
is made to make this Package's interfaces visible to the end user of the
commercial distribution. Such use shall not be construed as a distribution of
9. The name of the Copyright Holder may not be used to endorse or promote
products derived from this software without specific prior written permission.
10. THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR