Information

started running for such interactive use in the most ordi-
nary 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 modied work as a
whole. If identiable 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 ma-
chine-readable source code, which must be distributed
under the terms of Sections 1 and 2 above on a medium
customarily used for soware interchange; or,
b) Accompany it with a written oer, 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 soware
interchange; or,
c) Accompany it with the information you received as to
the oer to distribute corresponding source code. (This
alternative is allowed only for noncommercial distribution
and only if you received the program in object code or exe-
cutable form with such an oer, in accord with Subsection
b above.)
The source code for a work means the preferred form of
the work for making modications to it. For an executable
work, complete source code means all the source code
for all modules it contains, plus any associated interface
denition les, 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
oering access to copy from a designated place, then
oering 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 dis-
tributing 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 ba-
sed 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 unenforce-
able 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 soware
distribution system, which is implemented by public
license practices. Many people have made generous contri-
butions to the wide range of soware 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 soware 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 geogra-
phical 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 Soware 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 dier in detail to address new
problems or concerns.
Each version is given a distinguishing version number.
If the Program species 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 So-
ware Foundation. If the Program does not specify a version
number of this License, you may choose any version ever
published by the Free Soware Foundation.
10. If you wish to incorporate parts of the Program into
other free programs whose distribution conditions are
dierent, write to the author to ask for permission.
For soware which is copyrighted by the Free Soware
Foundation, write to the Free Soware 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 soware and of promoting the
sharing and reuse of soware generally.
NO WARRANTY
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THE-
RE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PER-
MITTED 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
How to Apply These Terms to Your New Programs
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 soware which everyone can
redistribute and change under these terms.
To do so, attach the following notices to the program. It
is safest to attach them to the start of each source le to
most eectively convey the exclusion of warranty; and
each le should have at least the „copyright“ line and a
pointer to where the full notice is found.
one line to give the program‘s name and an idea of what
it does.
Copyright (C) yyyy name of author
This program is free soware; you can redistribute it and/or
modify it under the terms of the GNU General Public
License
as published by the Free Soware Foundation; either
version 2
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, write to the Free Soware
Foundation, Inc., 51 Franklin Street, Fih Floor, Boston, MA
02110-1301, USA.
Also add information on how to contact you by electronic
and paper mail.
If the program is interactive, make it output a short notice
like this when it starts in an interactive mode:
Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for
details
type `show w‘. This is free soware, and you are welcome
to redistribute it under certain conditions; type `show c‘
for details.
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.
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:
Yoyodyne, Inc., hereby disclaims all copyright
interest in the program `Gnomovision‘
(which makes passes at compilers) written
by James Hacker.
signature of Ty Coon, 1 April 1989
Ty Coon, President of Vice
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 Lesser General
Public License instead of this License.
--------------------------------------------------------------
GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright © 2007 Free Soware Foundation, Inc. <https://
fsf.org/>
Everyone is permitted to copy and distribute verbatim
copies of this license document, but changing it is not
allowed.
Preamble
The GNU General Public License is a free, copyle license
for soware and other kinds of works.
The licenses for most soware and other practical works
are designed to take away your freedom to share and
change the works. By contrast, the GNU General Public
License is intended to guarantee your freedom to share
and change all versions of a program--to make sure
it remains free soware for all its users. We, the Free
Soware Foundation, use the GNU General Public License
for most of our soware; it applies also to any other work
released this way by its authors. You can apply it to your
programs, too.
When we speak of free soware, we are referring to free-
dom, not price. Our General Public Licenses are designed to
make sure that you have the freedom to distribute copies
of free soware (and charge for them if you wish), that
you receive source code or can get it if you want it, that
you can change the soware 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 prevent others from
denying you these rights or asking you to surrender the
rights. Therefore, you have certain responsibilities if you
distribute copies of the soware, or if you modify it:
responsibilities to respect the freedom of others.
For example, if you distribute copies of such a program,
whether gratis or for a fee, you must pass on to the
recipients the same freedoms that you received. 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.
Developers that use the GNU GPL protect your rights with
two steps: (1) assert copyright on the soware, and (2)
oer you this License giving you legal permission to copy,
distribute and/or modify it.
For the developers‘ and authors‘ protection, the GPL clearly
explains that there is no warranty for this free soware.
For both users‘ and authors‘ sake, the GPL requires that
modied versions be marked as changed, so that their
problems will not be attributed erroneously to authors of
previous versions.
Some devices are designed to deny users access to install
or run modied versions of the soware inside them, al-
though the manufacturer can do so. This is fundamentally
incompatible with the aim of protecting users‘ freedom to
change the soware. The systematic pattern of such abuse
occurs in the area of products for individuals to use, which
is precisely where it is most unacceptable. Therefore,
we have designed this version of the GPL to prohibit the
practice for those products. If such problems arise subs-
tantially in other domains, we stand ready to extend this
provision to those domains in future versions of the GPL,
as needed to protect the freedom of users.
Finally, every program is threatened constantly by so-
ware patents. States should not allow patents to restrict
development and use of soware on general-purpose
computers, but in those that do, we wish to avoid the
special danger that patents applied to a free program
could make it eectively proprietary. To prevent this, the
GPL assures that patents cannot be used to render the
program non-free.
The precise terms and conditions for copying, distribution
and modication follow.
TERMS AND CONDITIONS
0. Denitions.
„This License“ refers to version 3 of the GNU General Public
License.
„Copyright“ also means copyright-like laws that apply to
other kinds of works, such as semiconductor masks.
„The Program“ refers to any copyrightable work licensed
under this License. Each licensee is addressed as „you“.
„Licensees“ and „recipients“ may be individuals or
organizations.
To „modify“ a work means to copy from or adapt all or part
of the work in a fashion requiring copyright permission,
other than the making of an exact copy. The resulting work
is called a „modied version“ of the earlier work or a work
„based on“ the earlier work.
A „covered work“ means either the unmodied Program or
a work based on the Program.
To „propagate“ a work means to do anything with it that,
without permission, would make you directly or seconda-
rily liable for infringement under applicable copyright law,
except executing it on a computer or modifying a private
copy. Propagation includes copying, distribution (with or
without modication), making available to the public, and
in some countries other activities as well.
To „convey“ a work means any kind of propagation that
enables other parties to make or receive copies. Mere
interaction with a user through a computer network, with
no transfer of a copy, is not conveying.
An interactive user interface displays „Appropriate Legal
Notices“ to the extent that it includes a convenient and
prominently visible feature that (1) displays an appropriate
copyright notice, and (2) tells the user that there is no
warranty for the work (except to the extent that warranties
are provided), that licensees may convey the work under
this License, and how to view a copy of this License. If
the interface presents a list of user commands or options,
such as a menu, a prominent item in the list meets this
criterion.
1. Source Code.
The „source code“ for a work means the preferred form
of the work for making modications to it. „Object code“
means any non-source form of a work.
A „Standard Interface“ means an interface that either is
an ocial standard dened by a recognized standards
body, or, in the case of interfaces specied for a particular
programming language, one that is widely used among
developers working in that language.
The „System Libraries“ of an executable work include
anything, other than the work as a whole, that (a) is inclu-
ded in the normal form of packaging a Major Component,
but which is not part of that Major Component, and (b)
serves only to enable use of the work with that Major Com-
ponent, or to implement a Standard Interface for which
an implementation is available to the public in source
code form. A „Major Component“, in this context, means
a major essential component (kernel, window system, and
so on) of the specic operating system (if any) on which
the executable work runs, or a compiler used to produce
the work, or an object code interpreter used to run it.
The „Corresponding Source“ for a work in object code form
means all the source code needed to generate, install, and
(for an executable work) run the object code and to modify
the work, including scripts to control those activities. Ho-
wever, it does not include the work‘s System Libraries, or
general-purpose tools or generally available free programs
which are used unmodied in performing those activities
but which are not part of the work. For example, Cor-
responding Source includes interface denition les associ-
ated
with source les for the work, and the source code
for shared libraries and dynamically linked subprograms
that the work is specically designed to require, such as
by intimate data communication or control ow between
those subprograms and other parts of the work.
The Corresponding Source need not include anything that
users can regenerate automatically from other parts of the
Corresponding Source.
The Corresponding Source for a work in source code form is
that same work.
2. Basic Permissions.
All rights granted under this License are granted for the
term of copyright on the Program, and are irrevocable pro-
vided the stated conditions are met. This License explicitly
arms your unlimited permission to run the unmodied
Program. The output from running a covered work is co-
vered by this License only if the output, given its content,
constitutes a covered work. This License acknowledges
your rights of fair use or other equivalent, as provided by
copyright law.
You may make, run and propagate covered works that you
do not convey, without conditions so long as your license
otherwise remains in force. You may convey covered works
to others for the sole purpose of having them make modi-
cations exclusively for you, or provide you with facilities
for running those works, provided that you comply with
the terms of this License in conveying all material for
which you do not control copyright. Those thus making or
running the covered works for you must do so exclusively
on your behalf, under your direction and control, on terms
that prohibit them from making any copies of your copy-
righted material outside their relationship with you.
Conveying under any other circumstances is permitted
solely under the conditions stated below. Sublicensing is
not allowed; section 10 makes it unnecessary.
3. Protecting Users‘ Legal Rights From Anti-Circumvention
Law.
No covered work shall be deemed part of an eective
technological measure under any applicable law fullling
obligations under article 11 of the WIPO copyright treaty
adopted on 20 December 1996, or similar laws prohibiting
or restricting circumvention of such measures.
When you convey a covered work, you waive any legal
power to forbid circumvention of technological measures
to the extent such circumvention is eected by exercising
rights under this License with respect to the covered
work, and you disclaim any intention to limit operation or
modication of the work as a means of enforcing, against
the work‘s users, your or third parties‘ legal rights to forbid
circumvention of technological measures.
4. Conveying Verbatim Copies.
You may convey 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; keep intact all notices stating
that this License and any non-permissive terms added in
accord with section 7 apply to the code; keep intact all
notices of the absence of any warranty; and give all reci-
pients a copy of this License along with the Program.
You may charge any price or no price for each copy that you
convey, and you may oer support or warranty protection
for a fee.
5. Conveying Modied Source Versions.
You may convey a work based on the Program, or the
modications to produce it from the Program, in the form
of source code under the terms of section 4, provided that
you also meet all of these conditions:
a) The work must carry prominent notices stating that you
modied it, and giving a relevant date.
b) The work must carry prominent notices stating that it is
released under this License and any conditions added un-
der section 7. This requirement modies the requirement
in section 4 to „keep intact all notices“.
c) You must license the entire work, as a whole, under this
License to anyone who comes into possession of a copy.
This License will therefore apply, along with any applicable
section 7 additional terms, to the whole of the work, and
all its parts, regardless of how they are packaged. This
License gives no permission to license the work in any
other way, but it does not invalidate such permission if
you have separately received it.
d) If the work has interactive user interfaces, each must
display Appropriate Legal Notices; however, if the Program
has interactive interfaces that do not display Appropriate
Legal Notices, your work need not make them do so.
A compilation of a covered work with other separate and
independent works, which are not by their nature exten-
sions of the covered work, and which are not combined
with it such as to form a larger program, in or on a volume
of a storage or distribution medium, is called an „aggre-
gate“ if the compilation and its resulting copyright are not
used to limit the access or legal rights of the compilation‘s
users beyond what the individual works permit. Inclusion
of a covered work in an aggregate does not cause this
License to apply to the other parts of the aggregate.
6. Conveying Non-Source Forms.
You may convey a covered work in object code form under
the terms of sections 4 and 5, provided that you also
convey the machine-readable Corresponding Source under
the terms of this License, in one of these ways:
a) Convey the object code in, or embodied in, a physical
product (including a physical distribution medium),
accompanied by the Corresponding Source xed on a
durable physical medium customarily used for soware
interchange.
b) Convey the object code in, or embodied in, a physical
product (including a physical distribution medium),
accompanied by a written oer, valid for at least three
years and valid for as long as you oer spare parts or
customer support for that product model, to give anyone
who possesses the object code either (1) a copy of the Cor-
responding Source for all the soware in the product that
is covered by this License, on a durable physical medium
customarily used for soware interchange, for a price no
more than your reasonable cost of physically performing
this conveying of source, or (2) access to copy the Corres-
ponding Source from a network server at no charge.
c) Convey individual copies of the object code with a copy
of the written oer to provide the Corresponding Source.
This alternative is allowed only occasionally and noncom-
mercially, and only if you received the object code with
such an oer, in accord with subsection 6b.
d) Convey the object code by oering access from a desi-
gnated place (gratis or for a charge), and oer equivalent
access to the Corresponding Source in the same way
through the same place at no further charge. You need not
require recipients to copy the Corresponding Source along
with the object code. If the place to copy the object code
is a network server, the Corresponding Source may be on
a dierent server (operated by you or a third party) that
supports equivalent copying facilities, provided you main-
tain clear directions next to the object code saying where
to nd the Corresponding Source. Regardless of what server
hosts the Corresponding Source, you remain obligated to
ensure that it is available for as long as needed to satisfy
these requirements.
e) Convey the object code using peer-to-peer transmission,
provided you inform other peers where the object code
and Corresponding Source of the work are being oered to
the general public at no charge under subsection 6d.
A separable portion of the object code, whose source code
is excluded from the Corresponding Source as a System
Library, need not be included in conveying the object code
work.
A „User Product“ is either (1) a „consumer product“, which
means any tangible personal property which is normally
used for personal, family, or household purposes, or (2)
anything designed or sold for incorporation into a dwel-
ling. In determining whether a product is a consumer pro-
duct, doubtful cases shall be resolved in favor of coverage.
For a particular product received by a particular user, „nor-
mally used“ refers to a typical or common use of that class
of product, regardless of the status of the particular user
or of the way in which the particular user actually uses, or
expects or is expected to use, the product. A product is a
consumer product regardless of whether the product has
substantial commercial, industrial or non-consumer uses,
unless such uses represent the only signicant mode of use
of the product.
„Installation Information“ for a User Product means any
methods, procedures, authorization keys, or other infor-
mation required to install and execute modied versions
of a covered work in that User Product from a modied
version of its Corresponding Source. The information must
suce to ensure that the continued functioning of the
modied object code is in no case prevented or interfered
with solely because modication has been made.
If you convey an object code work under this section in,
or with, or specically for use in, a User Product, and the
conveying occurs as part of a transaction in which the right
of possession and use of the User Product is transferred to
the recipient in perpetuity or for a xed term (regardless
of how the transaction is characterized), the Corresponding
Source conveyed under this section must be accompanied
by the Installation Information. But this requirement does
not apply if neither you nor any third party retains the
ability to install modied object code on the User Product
(for example, the work has been installed in ROM).
The requirement to provide Installation Information does
not include a requirement to continue to provide support
service, warranty, or updates for a work that has been
modied or installed by the recipient, or for the User
Product in which it has been modied or installed. Access
to a network may be denied when the modication itself
materially and adversely aects the operation of the net-
work or violates the rules and protocols for communication
across the network.
Corresponding Source conveyed, and Installation Infor-
mation provided, in accord with this section must be
in a format that is publicly documented (and with an
implementation available to the public in source code
form), and must require no special password or key for
unpacking, reading or copying.
7. Additional Terms.
„Additional permissions“ are terms that supplement the
terms of this License by making exceptions from one or
more of its conditions. Additional permissions that are
applicable to the entire Program shall be treated as though
they were included in this License, to the extent that they
are valid under applicable law. If additional permissions
apply only to part of the Program, that part may be used
separately under those permissions, but the entire Program
remains governed by this License without regard to the
additional permissions.
When you convey a copy of a covered work, you may at
your option remove any additional permissions from that
copy, or from any part of it. (Additional permissions may
be written to require their own removal in certain cases
when you modify the work.) You may place additional
permissions on material, added by you to a covered work,
for which you have or can give appropriate copyright
permission.
Notwithstanding any other provision of this License, for
material you add to a covered work, you may (if authorized
by the copyright holders of that material) supplement the
terms of this License with terms:
a) Disclaiming warranty or limiting liability dierently from
the terms of sections 15 and 16 of this License; or
b) Requiring preservation of specied reasonable legal
notices or author attributions in that material or in the
Appropriate Legal Notices displayed by works containing
it; or
c) Prohibiting misrepresentation of the origin of that
material, or requiring that modied versions of such
material be marked in reasonable ways as dierent from
the original version; or
d) Limiting the use for publicity purposes of names of
licensors or authors of the material; or
e) Declining to grant rights under trademark law for use of
some trade names, trademarks, or service marks; or
f) Requiring indemnication of licensors and authors of
that material by anyone who conveys the material (or
modied versions of it) with contractual assumptions
of liability to the recipient, for any liability that these
contractual assumptions directly impose on those licensors
and authors.
All other non-permissive additional terms are considered
„further restrictions“ within the meaning of section 10. If
the Program as you received it, or any part of it, contains a
notice stating that it is governed by this License along with
a term that is a further restriction, you may remove that
term. If a license document contains a further restriction
but permits relicensing or conveying under this License,
you may add to a covered work material governed by the
terms of that license document, provided that the further
restriction does not survive such relicensing or conveying.
If you add terms to a covered work in accord with this
section, you must place, in the relevant source les, a
statement of the additional terms that apply to those les,
or a notice indicating where to nd the applicable terms.
Additional terms, permissive or non-permissive, may be
stated in the form of a separately written license, or stated
as exceptions; the above requirements apply either way.
8. Termination.
You may not propagate or modify a covered work except
as expressly provided under this License. Any attempt
otherwise to propagate or modify it is void, and will
automatically terminate your rights under this License
(including any patent licenses granted under the third
paragraph of section 11).
However, if you cease all violation of this License, then
your license from a particular copyright holder is reinstated
(a) provisionally, unless and until the copyright holder
explicitly and nally terminates your license, and (b)
permanently, if the copyright holder fails to notify you of
the violation by some reasonable means prior to 60 days
aer the cessation.
Moreover, your license from a particular copyright holder is
reinstated permanently if the copyright holder noties you
of the violation by some reasonable means, this is the rst
time you have received notice of violation of this License
(for any work) from that copyright holder, and you cure the
violation prior to 30 days aer your receipt of the notice.
Termination of your rights under this section does not ter-
minate the licenses of parties who have received copies or
GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Soware Foundation,
Inc. 51 Franklin Street, Fih Floor, Boston, MA 02110-
1301, 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 soware 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
soware--to make sure the soware is free for all
its users. This General Public License applies to most
of the Free Soware Foundation‘s soware and to
any other program whose authors commit to using
it. (Some other Free Soware Foundation soware
is covered by the GNU Lesser General Public License
instead.) You can apply it to your programs, too.
When we speak of free soware, 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 soware (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
soware 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 transla-
te to certain responsibilities for you if you distribute
copies of the soware, or if you modify it.
For example, if you distribute copies of such a pro-
gram, 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 soware, and (2) oer you this license which
gives you legal permission to copy, distribute and/or
modify the soware.
Also, for each author‘s protection and ours, we want
to make certain that everyone understands that there
is no warranty for this free soware. If the soware
is modied 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 reect on the original authors‘ reputations.
Finally, any free program is threatened constantly
by soware patents. We wish to avoid the danger
that redistributors of a free program will individually
obtain patent licenses, in eect 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, distri-
bution and modication follow.
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 ba-
sed 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 modications and/or translated into
another language. (Hereinaer, translation is inclu-
ded without limitation in the term „modication“.)
Each licensee is addressed as „you“.
Activities other than copying, distribution and
modication 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 co-
vered 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 trans-
ferring a copy, and you may at your option oer
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 modi-
cations or work under the terms of Section 1 above,
provided that you also meet all of these conditions:
a) You must cause the modied les to carry promi-
nent notices stating that you changed the les and
the date of any change.
b) You must cause any work that you distribute or pu-
blish, 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 modied program normally reads commands
interactively when run, you must cause it, when
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