changeset 9 1af54f006439
     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/licence/gpl-3.0.tex	Tue Apr 07 13:09:28 2009 +0200
     1.3 @@ -0,0 +1,719 @@
     1.4 +\documentclass[11pt]{article}
     1.5 +
     1.7 +\date{Version 3, 29 June 2007}
     1.8 +
     1.9 +\begin{document}
    1.10 +\maketitle
    1.11 +
    1.12 +\begin{center}
    1.13 +{\parindent 0in
    1.14 +
    1.15 +Copyright \copyright\  2007 Free Software Foundation, Inc. \texttt{}
    1.16 +
    1.17 +\bigskip
    1.18 +Everyone is permitted to copy and distribute verbatim copies of this
    1.19 +
    1.20 +license document, but changing it is not allowed.}
    1.21 +
    1.22 +\end{center}
    1.23 +
    1.24 +\renewcommand{\abstractname}{Preamble}
    1.25 +\begin{abstract}
    1.26 +The GNU General Public License is a free, copyleft license for
    1.27 +software and other kinds of works.
    1.28 +
    1.29 +The licenses for most software and other practical works are designed
    1.30 +to take away your freedom to share and change the works.  By contrast,
    1.31 +the GNU General Public License is intended to guarantee your freedom to
    1.32 +share and change all versions of a program--to make sure it remains free
    1.33 +software for all its users.  We, the Free Software Foundation, use the
    1.34 +GNU General Public License for most of our software; it applies also to
    1.35 +any other work released this way by its authors.  You can apply it to
    1.36 +your programs, too.
    1.37 +
    1.38 +When we speak of free software, we are referring to freedom, not
    1.39 +price.  Our General Public Licenses are designed to make sure that you
    1.40 +have the freedom to distribute copies of free software (and charge for
    1.41 +them if you wish), that you receive source code or can get it if you
    1.42 +want it, that you can change the software or use pieces of it in new
    1.43 +free programs, and that you know you can do these things.
    1.44 +
    1.45 +To protect your rights, we need to prevent others from denying you
    1.46 +these rights or asking you to surrender the rights.  Therefore, you have
    1.47 +certain responsibilities if you distribute copies of the software, or if
    1.48 +you modify it: responsibilities to respect the freedom of others.
    1.49 +
    1.50 +For example, if you distribute copies of such a program, whether
    1.51 +gratis or for a fee, you must pass on to the recipients the same
    1.52 +freedoms that you received.  You must make sure that they, too, receive
    1.53 +or can get the source code.  And you must show them these terms so they
    1.54 +know their rights.
    1.55 +
    1.56 +Developers that use the GNU GPL protect your rights with two steps:
    1.57 +(1) assert copyright on the software, and (2) offer you this License
    1.58 +giving you legal permission to copy, distribute and/or modify it.
    1.59 +
    1.60 +For the developers' and authors' protection, the GPL clearly explains
    1.61 +that there is no warranty for this free software.  For both users' and
    1.62 +authors' sake, the GPL requires that modified versions be marked as
    1.63 +changed, so that their problems will not be attributed erroneously to
    1.64 +authors of previous versions.
    1.65 +
    1.66 +Some devices are designed to deny users access to install or run
    1.67 +modified versions of the software inside them, although the manufacturer
    1.68 +can do so.  This is fundamentally incompatible with the aim of
    1.69 +protecting users' freedom to change the software.  The systematic
    1.70 +pattern of such abuse occurs in the area of products for individuals to
    1.71 +use, which is precisely where it is most unacceptable.  Therefore, we
    1.72 +have designed this version of the GPL to prohibit the practice for those
    1.73 +products.  If such problems arise substantially in other domains, we
    1.74 +stand ready to extend this provision to those domains in future versions
    1.75 +of the GPL, as needed to protect the freedom of users.
    1.76 +
    1.77 +Finally, every program is threatened constantly by software patents.
    1.78 +States should not allow patents to restrict development and use of
    1.79 +software on general-purpose computers, but in those that do, we wish to
    1.80 +avoid the special danger that patents applied to a free program could
    1.81 +make it effectively proprietary.  To prevent this, the GPL assures that
    1.82 +patents cannot be used to render the program non-free.
    1.83 +
    1.84 +The precise terms and conditions for copying, distribution and
    1.85 +modification follow.
    1.86 +\end{abstract}
    1.87 +
    1.88 +\begin{center}
    1.89 +{\Large \sc Terms and Conditions}
    1.90 +\end{center}
    1.91 +
    1.92 +
    1.93 +\begin{enumerate}
    1.94 +
    1.95 +\addtocounter{enumi}{-1}
    1.96 +
    1.97 +\item Definitions.
    1.98 +
    1.99 +``This License'' refers to version 3 of the GNU General Public License.
   1.100 +
   1.101 +``Copyright'' also means copyright-like laws that apply to other kinds of
   1.102 +works, such as semiconductor masks.
   1.103 +
   1.104 +``The Program'' refers to any copyrightable work licensed under this
   1.105 +License.  Each licensee is addressed as ``you''.  ``Licensees'' and
   1.106 +``recipients'' may be individuals or organizations.
   1.107 +
   1.108 +To ``modify'' a work means to copy from or adapt all or part of the work
   1.109 +in a fashion requiring copyright permission, other than the making of an
   1.110 +exact copy.  The resulting work is called a ``modified version'' of the
   1.111 +earlier work or a work ``based on'' the earlier work.
   1.112 +
   1.113 +A ``covered work'' means either the unmodified Program or a work based
   1.114 +on the Program.
   1.115 +
   1.116 +To ``propagate'' a work means to do anything with it that, without
   1.117 +permission, would make you directly or secondarily liable for
   1.118 +infringement under applicable copyright law, except executing it on a
   1.119 +computer or modifying a private copy.  Propagation includes copying,
   1.120 +distribution (with or without modification), making available to the
   1.121 +public, and in some countries other activities as well.
   1.122 +
   1.123 +To ``convey'' a work means any kind of propagation that enables other
   1.124 +parties to make or receive copies.  Mere interaction with a user through
   1.125 +a computer network, with no transfer of a copy, is not conveying.
   1.126 +
   1.127 +An interactive user interface displays ``Appropriate Legal Notices''
   1.128 +to the extent that it includes a convenient and prominently visible
   1.129 +feature that (1) displays an appropriate copyright notice, and (2)
   1.130 +tells the user that there is no warranty for the work (except to the
   1.131 +extent that warranties are provided), that licensees may convey the
   1.132 +work under this License, and how to view a copy of this License.  If
   1.133 +the interface presents a list of user commands or options, such as a
   1.134 +menu, a prominent item in the list meets this criterion.
   1.135 +
   1.136 +\item Source Code.
   1.137 +
   1.138 +The ``source code'' for a work means the preferred form of the work
   1.139 +for making modifications to it.  ``Object code'' means any non-source
   1.140 +form of a work.
   1.141 +
   1.142 +A ``Standard Interface'' means an interface that either is an official
   1.143 +standard defined by a recognized standards body, or, in the case of
   1.144 +interfaces specified for a particular programming language, one that
   1.145 +is widely used among developers working in that language.
   1.146 +
   1.147 +The ``System Libraries'' of an executable work include anything, other
   1.148 +than the work as a whole, that (a) is included in the normal form of
   1.149 +packaging a Major Component, but which is not part of that Major
   1.150 +Component, and (b) serves only to enable use of the work with that
   1.151 +Major Component, or to implement a Standard Interface for which an
   1.152 +implementation is available to the public in source code form.  A
   1.153 +``Major Component'', in this context, means a major essential component
   1.154 +(kernel, window system, and so on) of the specific operating system
   1.155 +(if any) on which the executable work runs, or a compiler used to
   1.156 +produce the work, or an object code interpreter used to run it.
   1.157 +
   1.158 +The ``Corresponding Source'' for a work in object code form means all
   1.159 +the source code needed to generate, install, and (for an executable
   1.160 +work) run the object code and to modify the work, including scripts to
   1.161 +control those activities.  However, it does not include the work's
   1.162 +System Libraries, or general-purpose tools or generally available free
   1.163 +programs which are used unmodified in performing those activities but
   1.164 +which are not part of the work.  For example, Corresponding Source
   1.165 +includes interface definition files associated with source files for
   1.166 +the work, and the source code for shared libraries and dynamically
   1.167 +linked subprograms that the work is specifically designed to require,
   1.168 +such as by intimate data communication or control flow between those
   1.169 +subprograms and other parts of the work.
   1.170 +
   1.171 +The Corresponding Source need not include anything that users
   1.172 +can regenerate automatically from other parts of the Corresponding
   1.173 +Source.
   1.174 +
   1.175 +The Corresponding Source for a work in source code form is that
   1.176 +same work.
   1.177 +
   1.178 +\item Basic Permissions.
   1.179 +
   1.180 +All rights granted under this License are granted for the term of
   1.181 +copyright on the Program, and are irrevocable provided the stated
   1.182 +conditions are met.  This License explicitly affirms your unlimited
   1.183 +permission to run the unmodified Program.  The output from running a
   1.184 +covered work is covered by this License only if the output, given its
   1.185 +content, constitutes a covered work.  This License acknowledges your
   1.186 +rights of fair use or other equivalent, as provided by copyright law.
   1.187 +
   1.188 +You may make, run and propagate covered works that you do not
   1.189 +convey, without conditions so long as your license otherwise remains
   1.190 +in force.  You may convey covered works to others for the sole purpose
   1.191 +of having them make modifications exclusively for you, or provide you
   1.192 +with facilities for running those works, provided that you comply with
   1.193 +the terms of this License in conveying all material for which you do
   1.194 +not control copyright.  Those thus making or running the covered works
   1.195 +for you must do so exclusively on your behalf, under your direction
   1.196 +and control, on terms that prohibit them from making any copies of
   1.197 +your copyrighted material outside their relationship with you.
   1.198 +
   1.199 +Conveying under any other circumstances is permitted solely under
   1.200 +the conditions stated below.  Sublicensing is not allowed; section 10
   1.201 +makes it unnecessary.
   1.202 +
   1.203 +\item Protecting Users' Legal Rights From Anti-Circumvention Law.
   1.204 +
   1.205 +No covered work shall be deemed part of an effective technological
   1.206 +measure under any applicable law fulfilling obligations under article
   1.207 +11 of the WIPO copyright treaty adopted on 20 December 1996, or
   1.208 +similar laws prohibiting or restricting circumvention of such
   1.209 +measures.
   1.210 +
   1.211 +When you convey a covered work, you waive any legal power to forbid
   1.212 +circumvention of technological measures to the extent such circumvention
   1.213 +is effected by exercising rights under this License with respect to
   1.214 +the covered work, and you disclaim any intention to limit operation or
   1.215 +modification of the work as a means of enforcing, against the work's
   1.216 +users, your or third parties' legal rights to forbid circumvention of
   1.217 +technological measures.
   1.218 +
   1.219 +\item Conveying Verbatim Copies.
   1.220 +
   1.221 +You may convey verbatim copies of the Program's source code as you
   1.222 +receive it, in any medium, provided that you conspicuously and
   1.223 +appropriately publish on each copy an appropriate copyright notice;
   1.224 +keep intact all notices stating that this License and any
   1.225 +non-permissive terms added in accord with section 7 apply to the code;
   1.226 +keep intact all notices of the absence of any warranty; and give all
   1.227 +recipients a copy of this License along with the Program.
   1.228 +
   1.229 +You may charge any price or no price for each copy that you convey,
   1.230 +and you may offer support or warranty protection for a fee.
   1.231 +
   1.232 +\item Conveying Modified Source Versions.
   1.233 +
   1.234 +You may convey a work based on the Program, or the modifications to
   1.235 +produce it from the Program, in the form of source code under the
   1.236 +terms of section 4, provided that you also meet all of these conditions:
   1.237 +  \begin{enumerate}
   1.238 +  \item The work must carry prominent notices stating that you modified
   1.239 +  it, and giving a relevant date.
   1.240 +
   1.241 +  \item The work must carry prominent notices stating that it is
   1.242 +  released under this License and any conditions added under section
   1.243 +  7.  This requirement modifies the requirement in section 4 to
   1.244 +  ``keep intact all notices''.
   1.245 +
   1.246 +  \item You must license the entire work, as a whole, under this
   1.247 +  License to anyone who comes into possession of a copy.  This
   1.248 +  License will therefore apply, along with any applicable section 7
   1.249 +  additional terms, to the whole of the work, and all its parts,
   1.250 +  regardless of how they are packaged.  This License gives no
   1.251 +  permission to license the work in any other way, but it does not
   1.252 +  invalidate such permission if you have separately received it.
   1.253 +
   1.254 +  \item If the work has interactive user interfaces, each must display
   1.255 +  Appropriate Legal Notices; however, if the Program has interactive
   1.256 +  interfaces that do not display Appropriate Legal Notices, your
   1.257 +  work need not make them do so.
   1.258 +\end{enumerate}
   1.259 +A compilation of a covered work with other separate and independent
   1.260 +works, which are not by their nature extensions of the covered work,
   1.261 +and which are not combined with it such as to form a larger program,
   1.262 +in or on a volume of a storage or distribution medium, is called an
   1.263 +``aggregate'' if the compilation and its resulting copyright are not
   1.264 +used to limit the access or legal rights of the compilation's users
   1.265 +beyond what the individual works permit.  Inclusion of a covered work
   1.266 +in an aggregate does not cause this License to apply to the other
   1.267 +parts of the aggregate.
   1.268 +
   1.269 +\item Conveying Non-Source Forms.
   1.270 +
   1.271 +You may convey a covered work in object code form under the terms
   1.272 +of sections 4 and 5, provided that you also convey the
   1.273 +machine-readable Corresponding Source under the terms of this License,
   1.274 +in one of these ways:
   1.275 +  \begin{enumerate}
   1.276 +  \item Convey the object code in, or embodied in, a physical product
   1.277 +  (including a physical distribution medium), accompanied by the
   1.278 +  Corresponding Source fixed on a durable physical medium
   1.279 +  customarily used for software interchange.
   1.280 +
   1.281 +  \item Convey the object code in, or embodied in, a physical product
   1.282 +  (including a physical distribution medium), accompanied by a
   1.283 +  written offer, valid for at least three years and valid for as
   1.284 +  long as you offer spare parts or customer support for that product
   1.285 +  model, to give anyone who possesses the object code either (1) a
   1.286 +  copy of the Corresponding Source for all the software in the
   1.287 +  product that is covered by this License, on a durable physical
   1.288 +  medium customarily used for software interchange, for a price no
   1.289 +  more than your reasonable cost of physically performing this
   1.290 +  conveying of source, or (2) access to copy the
   1.291 +  Corresponding Source from a network server at no charge.
   1.292 +
   1.293 +  \item Convey individual copies of the object code with a copy of the
   1.294 +  written offer to provide the Corresponding Source.  This
   1.295 +  alternative is allowed only occasionally and noncommercially, and
   1.296 +  only if you received the object code with such an offer, in accord
   1.297 +  with subsection 6b.
   1.298 +
   1.299 +  \item Convey the object code by offering access from a designated
   1.300 +  place (gratis or for a charge), and offer equivalent access to the
   1.301 +  Corresponding Source in the same way through the same place at no
   1.302 +  further charge.  You need not require recipients to copy the
   1.303 +  Corresponding Source along with the object code.  If the place to
   1.304 +  copy the object code is a network server, the Corresponding Source
   1.305 +  may be on a different server (operated by you or a third party)
   1.306 +  that supports equivalent copying facilities, provided you maintain
   1.307 +  clear directions next to the object code saying where to find the
   1.308 +  Corresponding Source.  Regardless of what server hosts the
   1.309 +  Corresponding Source, you remain obligated to ensure that it is
   1.310 +  available for as long as needed to satisfy these requirements.
   1.311 +
   1.312 +  \item Convey the object code using peer-to-peer transmission, provided
   1.313 +  you inform other peers where the object code and Corresponding
   1.314 +  Source of the work are being offered to the general public at no
   1.315 +  charge under subsection 6d.
   1.316 +  \end{enumerate}
   1.317 +
   1.318 +A separable portion of the object code, whose source code is excluded
   1.319 +from the Corresponding Source as a System Library, need not be
   1.320 +included in conveying the object code work.
   1.321 +
   1.322 +A ``User Product'' is either (1) a ``consumer product'', which means any
   1.323 +tangible personal property which is normally used for personal, family,
   1.324 +or household purposes, or (2) anything designed or sold for incorporation
   1.325 +into a dwelling.  In determining whether a product is a consumer product,
   1.326 +doubtful cases shall be resolved in favor of coverage.  For a particular
   1.327 +product received by a particular user, ``normally used'' refers to a
   1.328 +typical or common use of that class of product, regardless of the status
   1.329 +of the particular user or of the way in which the particular user
   1.330 +actually uses, or expects or is expected to use, the product.  A product
   1.331 +is a consumer product regardless of whether the product has substantial
   1.332 +commercial, industrial or non-consumer uses, unless such uses represent
   1.333 +the only significant mode of use of the product.
   1.334 +
   1.335 +``Installation Information'' for a User Product means any methods,
   1.336 +procedures, authorization keys, or other information required to install
   1.337 +and execute modified versions of a covered work in that User Product from
   1.338 +a modified version of its Corresponding Source.  The information must
   1.339 +suffice to ensure that the continued functioning of the modified object
   1.340 +code is in no case prevented or interfered with solely because
   1.341 +modification has been made.
   1.342 +
   1.343 +If you convey an object code work under this section in, or with, or
   1.344 +specifically for use in, a User Product, and the conveying occurs as
   1.345 +part of a transaction in which the right of possession and use of the
   1.346 +User Product is transferred to the recipient in perpetuity or for a
   1.347 +fixed term (regardless of how the transaction is characterized), the
   1.348 +Corresponding Source conveyed under this section must be accompanied
   1.349 +by the Installation Information.  But this requirement does not apply
   1.350 +if neither you nor any third party retains the ability to install
   1.351 +modified object code on the User Product (for example, the work has
   1.352 +been installed in ROM).
   1.353 +
   1.354 +The requirement to provide Installation Information does not include a
   1.355 +requirement to continue to provide support service, warranty, or updates
   1.356 +for a work that has been modified or installed by the recipient, or for
   1.357 +the User Product in which it has been modified or installed.  Access to a
   1.358 +network may be denied when the modification itself materially and
   1.359 +adversely affects the operation of the network or violates the rules and
   1.360 +protocols for communication across the network.
   1.361 +
   1.362 +Corresponding Source conveyed, and Installation Information provided,
   1.363 +in accord with this section must be in a format that is publicly
   1.364 +documented (and with an implementation available to the public in
   1.365 +source code form), and must require no special password or key for
   1.366 +unpacking, reading or copying.
   1.367 +
   1.368 +\item Additional Terms.
   1.369 +
   1.370 +``Additional permissions'' are terms that supplement the terms of this
   1.371 +License by making exceptions from one or more of its conditions.
   1.372 +Additional permissions that are applicable to the entire Program shall
   1.373 +be treated as though they were included in this License, to the extent
   1.374 +that they are valid under applicable law.  If additional permissions
   1.375 +apply only to part of the Program, that part may be used separately
   1.376 +under those permissions, but the entire Program remains governed by
   1.377 +this License without regard to the additional permissions.
   1.378 +
   1.379 +When you convey a copy of a covered work, you may at your option
   1.380 +remove any additional permissions from that copy, or from any part of
   1.381 +it.  (Additional permissions may be written to require their own
   1.382 +removal in certain cases when you modify the work.)  You may place
   1.383 +additional permissions on material, added by you to a covered work,
   1.384 +for which you have or can give appropriate copyright permission.
   1.385 +
   1.386 +Notwithstanding any other provision of this License, for material you
   1.387 +add to a covered work, you may (if authorized by the copyright holders of
   1.388 +that material) supplement the terms of this License with terms:
   1.389 +  \begin{enumerate}
   1.390 +  \item Disclaiming warranty or limiting liability differently from the
   1.391 +  terms of sections 15 and 16 of this License; or
   1.392 +
   1.393 +  \item Requiring preservation of specified reasonable legal notices or
   1.394 +  author attributions in that material or in the Appropriate Legal
   1.395 +  Notices displayed by works containing it; or
   1.396 +
   1.397 +  \item Prohibiting misrepresentation of the origin of that material, or
   1.398 +  requiring that modified versions of such material be marked in
   1.399 +  reasonable ways as different from the original version; or
   1.400 +
   1.401 +  \item Limiting the use for publicity purposes of names of licensors or
   1.402 +  authors of the material; or
   1.403 +
   1.404 +  \item Declining to grant rights under trademark law for use of some
   1.405 +  trade names, trademarks, or service marks; or
   1.406 +
   1.407 +  \item Requiring indemnification of licensors and authors of that
   1.408 +  material by anyone who conveys the material (or modified versions of
   1.409 +  it) with contractual assumptions of liability to the recipient, for
   1.410 +  any liability that these contractual assumptions directly impose on
   1.411 +  those licensors and authors.
   1.412 +  \end{enumerate}
   1.413 +
   1.414 +All other non-permissive additional terms are considered ``further
   1.415 +restrictions'' within the meaning of section 10.  If the Program as you
   1.416 +received it, or any part of it, contains a notice stating that it is
   1.417 +governed by this License along with a term that is a further
   1.418 +restriction, you may remove that term.  If a license document contains
   1.419 +a further restriction but permits relicensing or conveying under this
   1.420 +License, you may add to a covered work material governed by the terms
   1.421 +of that license document, provided that the further restriction does
   1.422 +not survive such relicensing or conveying.
   1.423 +
   1.424 +If you add terms to a covered work in accord with this section, you
   1.425 +must place, in the relevant source files, a statement of the
   1.426 +additional terms that apply to those files, or a notice indicating
   1.427 +where to find the applicable terms.
   1.428 +
   1.429 +Additional terms, permissive or non-permissive, may be stated in the
   1.430 +form of a separately written license, or stated as exceptions;
   1.431 +the above requirements apply either way.
   1.432 +
   1.433 +\item Termination.
   1.434 +
   1.435 +You may not propagate or modify a covered work except as expressly
   1.436 +provided under this License.  Any attempt otherwise to propagate or
   1.437 +modify it is void, and will automatically terminate your rights under
   1.438 +this License (including any patent licenses granted under the third
   1.439 +paragraph of section 11).
   1.440 +
   1.441 +However, if you cease all violation of this License, then your
   1.442 +license from a particular copyright holder is reinstated (a)
   1.443 +provisionally, unless and until the copyright holder explicitly and
   1.444 +finally terminates your license, and (b) permanently, if the copyright
   1.445 +holder fails to notify you of the violation by some reasonable means
   1.446 +prior to 60 days after the cessation.
   1.447 +
   1.448 +Moreover, your license from a particular copyright holder is
   1.449 +reinstated permanently if the copyright holder notifies you of the
   1.450 +violation by some reasonable means, this is the first time you have
   1.451 +received notice of violation of this License (for any work) from that
   1.452 +copyright holder, and you cure the violation prior to 30 days after
   1.453 +your receipt of the notice.
   1.454 +
   1.455 +Termination of your rights under this section does not terminate the
   1.456 +licenses of parties who have received copies or rights from you under
   1.457 +this License.  If your rights have been terminated and not permanently
   1.458 +reinstated, you do not qualify to receive new licenses for the same
   1.459 +material under section 10.
   1.460 +
   1.461 +\item Acceptance Not Required for Having Copies.
   1.462 +
   1.463 +You are not required to accept this License in order to receive or
   1.464 +run a copy of the Program.  Ancillary propagation of a covered work
   1.465 +occurring solely as a consequence of using peer-to-peer transmission
   1.466 +to receive a copy likewise does not require acceptance.  However,
   1.467 +nothing other than this License grants you permission to propagate or
   1.468 +modify any covered work.  These actions infringe copyright if you do
   1.469 +not accept this License.  Therefore, by modifying or propagating a
   1.470 +covered work, you indicate your acceptance of this License to do so.
   1.471 +
   1.472 +\item Automatic Licensing of Downstream Recipients.
   1.473 +
   1.474 +Each time you convey a covered work, the recipient automatically
   1.475 +receives a license from the original licensors, to run, modify and
   1.476 +propagate that work, subject to this License.  You are not responsible
   1.477 +for enforcing compliance by third parties with this License.
   1.478 +
   1.479 +An ``entity transaction'' is a transaction transferring control of an
   1.480 +organization, or substantially all assets of one, or subdividing an
   1.481 +organization, or merging organizations.  If propagation of a covered
   1.482 +work results from an entity transaction, each party to that
   1.483 +transaction who receives a copy of the work also receives whatever
   1.484 +licenses to the work the party's predecessor in interest had or could
   1.485 +give under the previous paragraph, plus a right to possession of the
   1.486 +Corresponding Source of the work from the predecessor in interest, if
   1.487 +the predecessor has it or can get it with reasonable efforts.
   1.488 +
   1.489 +You may not impose any further restrictions on the exercise of the
   1.490 +rights granted or affirmed under this License.  For example, you may
   1.491 +not impose a license fee, royalty, or other charge for exercise of
   1.492 +rights granted under this License, and you may not initiate litigation
   1.493 +(including a cross-claim or counterclaim in a lawsuit) alleging that
   1.494 +any patent claim is infringed by making, using, selling, offering for
   1.495 +sale, or importing the Program or any portion of it.
   1.496 +
   1.497 +\item Patents.
   1.498 +
   1.499 +A ``contributor'' is a copyright holder who authorizes use under this
   1.500 +License of the Program or a work on which the Program is based.  The
   1.501 +work thus licensed is called the contributor's ``contributor version''.
   1.502 +
   1.503 +A contributor's ``essential patent claims'' are all patent claims
   1.504 +owned or controlled by the contributor, whether already acquired or
   1.505 +hereafter acquired, that would be infringed by some manner, permitted
   1.506 +by this License, of making, using, or selling its contributor version,
   1.507 +but do not include claims that would be infringed only as a
   1.508 +consequence of further modification of the contributor version.  For
   1.509 +purposes of this definition, ``control'' includes the right to grant
   1.510 +patent sublicenses in a manner consistent with the requirements of
   1.511 +this License.
   1.512 +
   1.513 +Each contributor grants you a non-exclusive, worldwide, royalty-free
   1.514 +patent license under the contributor's essential patent claims, to
   1.515 +make, use, sell, offer for sale, import and otherwise run, modify and
   1.516 +propagate the contents of its contributor version.
   1.517 +
   1.518 +In the following three paragraphs, a ``patent license'' is any express
   1.519 +agreement or commitment, however denominated, not to enforce a patent
   1.520 +(such as an express permission to practice a patent or covenant not to
   1.521 +sue for patent infringement).  To ``grant'' such a patent license to a
   1.522 +party means to make such an agreement or commitment not to enforce a
   1.523 +patent against the party.
   1.524 +
   1.525 +If you convey a covered work, knowingly relying on a patent license,
   1.526 +and the Corresponding Source of the work is not available for anyone
   1.527 +to copy, free of charge and under the terms of this License, through a
   1.528 +publicly available network server or other readily accessible means,
   1.529 +then you must either (1) cause the Corresponding Source to be so
   1.530 +available, or (2) arrange to deprive yourself of the benefit of the
   1.531 +patent license for this particular work, or (3) arrange, in a manner
   1.532 +consistent with the requirements of this License, to extend the patent
   1.533 +license to downstream recipients.  ``Knowingly relying'' means you have
   1.534 +actual knowledge that, but for the patent license, your conveying the
   1.535 +covered work in a country, or your recipient's use of the covered work
   1.536 +in a country, would infringe one or more identifiable patents in that
   1.537 +country that you have reason to believe are valid.
   1.538 +
   1.539 +If, pursuant to or in connection with a single transaction or
   1.540 +arrangement, you convey, or propagate by procuring conveyance of, a
   1.541 +covered work, and grant a patent license to some of the parties
   1.542 +receiving the covered work authorizing them to use, propagate, modify
   1.543 +or convey a specific copy of the covered work, then the patent license
   1.544 +you grant is automatically extended to all recipients of the covered
   1.545 +work and works based on it.
   1.546 +
   1.547 +A patent license is ``discriminatory'' if it does not include within
   1.548 +the scope of its coverage, prohibits the exercise of, or is
   1.549 +conditioned on the non-exercise of one or more of the rights that are
   1.550 +specifically granted under this License.  You may not convey a covered
   1.551 +work if you are a party to an arrangement with a third party that is
   1.552 +in the business of distributing software, under which you make payment
   1.553 +to the third party based on the extent of your activity of conveying
   1.554 +the work, and under which the third party grants, to any of the
   1.555 +parties who would receive the covered work from you, a discriminatory
   1.556 +patent license (a) in connection with copies of the covered work
   1.557 +conveyed by you (or copies made from those copies), or (b) primarily
   1.558 +for and in connection with specific products or compilations that
   1.559 +contain the covered work, unless you entered into that arrangement,
   1.560 +or that patent license was granted, prior to 28 March 2007.
   1.561 +
   1.562 +Nothing in this License shall be construed as excluding or limiting
   1.563 +any implied license or other defenses to infringement that may
   1.564 +otherwise be available to you under applicable patent law.
   1.565 +
   1.566 +\item No Surrender of Others' Freedom.
   1.567 +
   1.568 +If conditions are imposed on you (whether by court order, agreement or
   1.569 +otherwise) that contradict the conditions of this License, they do not
   1.570 +excuse you from the conditions of this License.  If you cannot convey a
   1.571 +covered work so as to satisfy simultaneously your obligations under this
   1.572 +License and any other pertinent obligations, then as a consequence you may
   1.573 +not convey it at all.  For example, if you agree to terms that obligate you
   1.574 +to collect a royalty for further conveying from those to whom you convey
   1.575 +the Program, the only way you could satisfy both those terms and this
   1.576 +License would be to refrain entirely from conveying the Program.
   1.577 +
   1.578 +\item Use with the GNU Affero General Public License.
   1.579 +
   1.580 +Notwithstanding any other provision of this License, you have
   1.581 +permission to link or combine any covered work with a work licensed
   1.582 +under version 3 of the GNU Affero General Public License into a single
   1.583 +combined work, and to convey the resulting work.  The terms of this
   1.584 +License will continue to apply to the part which is the covered work,
   1.585 +but the special requirements of the GNU Affero General Public License,
   1.586 +section 13, concerning interaction through a network will apply to the
   1.587 +combination as such.
   1.588 +
   1.589 +\item Revised Versions of this License.
   1.590 +
   1.591 +The Free Software Foundation may publish revised and/or new versions of
   1.592 +the GNU General Public License from time to time.  Such new versions will
   1.593 +be similar in spirit to the present version, but may differ in detail to
   1.594 +address new problems or concerns.
   1.595 +
   1.596 +Each version is given a distinguishing version number.  If the
   1.597 +Program specifies that a certain numbered version of the GNU General
   1.598 +Public License ``or any later version'' applies to it, you have the
   1.599 +option of following the terms and conditions either of that numbered
   1.600 +version or of any later version published by the Free Software
   1.601 +Foundation.  If the Program does not specify a version number of the
   1.602 +GNU General Public License, you may choose any version ever published
   1.603 +by the Free Software Foundation.
   1.604 +
   1.605 +If the Program specifies that a proxy can decide which future
   1.606 +versions of the GNU General Public License can be used, that proxy's
   1.607 +public statement of acceptance of a version permanently authorizes you
   1.608 +to choose that version for the Program.
   1.609 +
   1.610 +Later license versions may give you additional or different
   1.611 +permissions.  However, no additional obligations are imposed on any
   1.612 +author or copyright holder as a result of your choosing to follow a
   1.613 +later version.
   1.614 +
   1.615 +\item Disclaimer of Warranty.
   1.616 +
   1.617 +\begin{sloppypar}
   1.627 +\end{sloppypar}
   1.628 +
   1.629 +\item Limitation of Liability.
   1.630 +
   1.640 + DAMAGES.
   1.641 +
   1.642 +\item Interpretation of Sections 15 and 16.
   1.643 +
   1.644 +If the disclaimer of warranty and limitation of liability provided
   1.645 +above cannot be given local legal effect according to their terms,
   1.646 +reviewing courts shall apply local law that most closely approximates
   1.647 +an absolute waiver of all civil liability in connection with the
   1.648 +Program, unless a warranty or assumption of liability accompanies a
   1.649 +copy of the Program in return for a fee.
   1.650 +
   1.651 +\begin{center}
   1.652 +{\Large\sc End of Terms and Conditions}
   1.653 +
   1.654 +\bigskip
   1.655 +How to Apply These Terms to Your New Programs
   1.656 +\end{center}
   1.657 +
   1.658 +If you develop a new program, and you want it to be of the greatest
   1.659 +possible use to the public, the best way to achieve this is to make it
   1.660 +free software which everyone can redistribute and change under these terms.
   1.661 +
   1.662 +To do so, attach the following notices to the program.  It is safest
   1.663 +to attach them to the start of each source file to most effectively
   1.664 +state the exclusion of warranty; and each file should have at least
   1.665 +the ``copyright'' line and a pointer to where the full notice is found.
   1.666 +
   1.667 +{\footnotesize
   1.668 +\begin{verbatim}
   1.669 +<one line to give the program's name and a brief idea of what it does.>
   1.670 +
   1.671 +Copyright (C) <textyear>  <name of author>
   1.672 +
   1.673 +This program is free software: you can redistribute it and/or modify
   1.674 +it under the terms of the GNU General Public License as published by
   1.675 +the Free Software Foundation, either version 3 of the License, or
   1.676 +(at your option) any later version.
   1.677 +
   1.678 +This program is distributed in the hope that it will be useful,
   1.679 +but WITHOUT ANY WARRANTY; without even the implied warranty of
   1.681 +GNU General Public License for more details.
   1.682 +
   1.683 +You should have received a copy of the GNU General Public License
   1.684 +along with this program.  If not, see <>.
   1.685 +\end{verbatim}
   1.686 +}
   1.687 +
   1.688 +Also add information on how to contact you by electronic and paper mail.
   1.689 +
   1.690 +If the program does terminal interaction, make it output a short
   1.691 +notice like this when it starts in an interactive mode:
   1.692 +
   1.693 +{\footnotesize
   1.694 +\begin{verbatim}
   1.695 +<program>  Copyright (C) <year>  <name of author>
   1.696 +
   1.697 +This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
   1.698 +This is free software, and you are welcome to redistribute it
   1.699 +under certain conditions; type `show c' for details.
   1.700 +\end{verbatim}
   1.701 +}
   1.702 +
   1.703 +The hypothetical commands {\tt show w} and {\tt show c} should show
   1.704 +the appropriate
   1.705 +parts of the General Public License.  Of course, your program's commands
   1.706 +might be different; for a GUI interface, you would use an ``about box''.
   1.707 +
   1.708 +You should also get your employer (if you work as a programmer) or
   1.709 +school, if any, to sign a ``copyright disclaimer'' for the program, if
   1.710 +necessary.  For more information on this, and how to apply and follow
   1.711 +the GNU GPL, see \texttt{}.
   1.712 +
   1.713 +The GNU General Public License does not permit incorporating your
   1.714 +program into proprietary programs.  If your program is a subroutine
   1.715 +library, you may consider it more useful to permit linking proprietary
   1.716 +applications with the library.  If this is what you want to do, use
   1.717 +the GNU Lesser General Public License instead of this License.  But
   1.718 +first, please read \texttt{}.
   1.719 +
   1.720 +\end{enumerate}
   1.721 +
   1.722 +\end{document}