simplex

Annotated docs/gpl-3.0.txt

25:b9819166a986
2011-10-29 Paul Boddie Fixed command syntax description.
paul@0 1
                    GNU GENERAL PUBLIC LICENSE
paul@0 2
                       Version 3, 29 June 2007
paul@0 3
paul@0 4
 Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
paul@0 5
 Everyone is permitted to copy and distribute verbatim copies
paul@0 6
 of this license document, but changing it is not allowed.
paul@0 7
paul@0 8
                            Preamble
paul@0 9
paul@0 10
  The GNU General Public License is a free, copyleft license for
paul@0 11
software and other kinds of works.
paul@0 12
paul@0 13
  The licenses for most software and other practical works are designed
paul@0 14
to take away your freedom to share and change the works.  By contrast,
paul@0 15
the GNU General Public License is intended to guarantee your freedom to
paul@0 16
share and change all versions of a program--to make sure it remains free
paul@0 17
software for all its users.  We, the Free Software Foundation, use the
paul@0 18
GNU General Public License for most of our software; it applies also to
paul@0 19
any other work released this way by its authors.  You can apply it to
paul@0 20
your programs, too.
paul@0 21
paul@0 22
  When we speak of free software, we are referring to freedom, not
paul@0 23
price.  Our General Public Licenses are designed to make sure that you
paul@0 24
have the freedom to distribute copies of free software (and charge for
paul@0 25
them if you wish), that you receive source code or can get it if you
paul@0 26
want it, that you can change the software or use pieces of it in new
paul@0 27
free programs, and that you know you can do these things.
paul@0 28
paul@0 29
  To protect your rights, we need to prevent others from denying you
paul@0 30
these rights or asking you to surrender the rights.  Therefore, you have
paul@0 31
certain responsibilities if you distribute copies of the software, or if
paul@0 32
you modify it: responsibilities to respect the freedom of others.
paul@0 33
paul@0 34
  For example, if you distribute copies of such a program, whether
paul@0 35
gratis or for a fee, you must pass on to the recipients the same
paul@0 36
freedoms that you received.  You must make sure that they, too, receive
paul@0 37
or can get the source code.  And you must show them these terms so they
paul@0 38
know their rights.
paul@0 39
paul@0 40
  Developers that use the GNU GPL protect your rights with two steps:
paul@0 41
(1) assert copyright on the software, and (2) offer you this License
paul@0 42
giving you legal permission to copy, distribute and/or modify it.
paul@0 43
paul@0 44
  For the developers' and authors' protection, the GPL clearly explains
paul@0 45
that there is no warranty for this free software.  For both users' and
paul@0 46
authors' sake, the GPL requires that modified versions be marked as
paul@0 47
changed, so that their problems will not be attributed erroneously to
paul@0 48
authors of previous versions.
paul@0 49
paul@0 50
  Some devices are designed to deny users access to install or run
paul@0 51
modified versions of the software inside them, although the manufacturer
paul@0 52
can do so.  This is fundamentally incompatible with the aim of
paul@0 53
protecting users' freedom to change the software.  The systematic
paul@0 54
pattern of such abuse occurs in the area of products for individuals to
paul@0 55
use, which is precisely where it is most unacceptable.  Therefore, we
paul@0 56
have designed this version of the GPL to prohibit the practice for those
paul@0 57
products.  If such problems arise substantially in other domains, we
paul@0 58
stand ready to extend this provision to those domains in future versions
paul@0 59
of the GPL, as needed to protect the freedom of users.
paul@0 60
paul@0 61
  Finally, every program is threatened constantly by software patents.
paul@0 62
States should not allow patents to restrict development and use of
paul@0 63
software on general-purpose computers, but in those that do, we wish to
paul@0 64
avoid the special danger that patents applied to a free program could
paul@0 65
make it effectively proprietary.  To prevent this, the GPL assures that
paul@0 66
patents cannot be used to render the program non-free.
paul@0 67
paul@0 68
  The precise terms and conditions for copying, distribution and
paul@0 69
modification follow.
paul@0 70
paul@0 71
                       TERMS AND CONDITIONS
paul@0 72
paul@0 73
  0. Definitions.
paul@0 74
paul@0 75
  "This License" refers to version 3 of the GNU General Public License.
paul@0 76
paul@0 77
  "Copyright" also means copyright-like laws that apply to other kinds of
paul@0 78
works, such as semiconductor masks.
paul@0 79
paul@0 80
  "The Program" refers to any copyrightable work licensed under this
paul@0 81
License.  Each licensee is addressed as "you".  "Licensees" and
paul@0 82
"recipients" may be individuals or organizations.
paul@0 83
paul@0 84
  To "modify" a work means to copy from or adapt all or part of the work
paul@0 85
in a fashion requiring copyright permission, other than the making of an
paul@0 86
exact copy.  The resulting work is called a "modified version" of the
paul@0 87
earlier work or a work "based on" the earlier work.
paul@0 88
paul@0 89
  A "covered work" means either the unmodified Program or a work based
paul@0 90
on the Program.
paul@0 91
paul@0 92
  To "propagate" a work means to do anything with it that, without
paul@0 93
permission, would make you directly or secondarily liable for
paul@0 94
infringement under applicable copyright law, except executing it on a
paul@0 95
computer or modifying a private copy.  Propagation includes copying,
paul@0 96
distribution (with or without modification), making available to the
paul@0 97
public, and in some countries other activities as well.
paul@0 98
paul@0 99
  To "convey" a work means any kind of propagation that enables other
paul@0 100
parties to make or receive copies.  Mere interaction with a user through
paul@0 101
a computer network, with no transfer of a copy, is not conveying.
paul@0 102
paul@0 103
  An interactive user interface displays "Appropriate Legal Notices"
paul@0 104
to the extent that it includes a convenient and prominently visible
paul@0 105
feature that (1) displays an appropriate copyright notice, and (2)
paul@0 106
tells the user that there is no warranty for the work (except to the
paul@0 107
extent that warranties are provided), that licensees may convey the
paul@0 108
work under this License, and how to view a copy of this License.  If
paul@0 109
the interface presents a list of user commands or options, such as a
paul@0 110
menu, a prominent item in the list meets this criterion.
paul@0 111
paul@0 112
  1. Source Code.
paul@0 113
paul@0 114
  The "source code" for a work means the preferred form of the work
paul@0 115
for making modifications to it.  "Object code" means any non-source
paul@0 116
form of a work.
paul@0 117
paul@0 118
  A "Standard Interface" means an interface that either is an official
paul@0 119
standard defined by a recognized standards body, or, in the case of
paul@0 120
interfaces specified for a particular programming language, one that
paul@0 121
is widely used among developers working in that language.
paul@0 122
paul@0 123
  The "System Libraries" of an executable work include anything, other
paul@0 124
than the work as a whole, that (a) is included in the normal form of
paul@0 125
packaging a Major Component, but which is not part of that Major
paul@0 126
Component, and (b) serves only to enable use of the work with that
paul@0 127
Major Component, or to implement a Standard Interface for which an
paul@0 128
implementation is available to the public in source code form.  A
paul@0 129
"Major Component", in this context, means a major essential component
paul@0 130
(kernel, window system, and so on) of the specific operating system
paul@0 131
(if any) on which the executable work runs, or a compiler used to
paul@0 132
produce the work, or an object code interpreter used to run it.
paul@0 133
paul@0 134
  The "Corresponding Source" for a work in object code form means all
paul@0 135
the source code needed to generate, install, and (for an executable
paul@0 136
work) run the object code and to modify the work, including scripts to
paul@0 137
control those activities.  However, it does not include the work's
paul@0 138
System Libraries, or general-purpose tools or generally available free
paul@0 139
programs which are used unmodified in performing those activities but
paul@0 140
which are not part of the work.  For example, Corresponding Source
paul@0 141
includes interface definition files associated with source files for
paul@0 142
the work, and the source code for shared libraries and dynamically
paul@0 143
linked subprograms that the work is specifically designed to require,
paul@0 144
such as by intimate data communication or control flow between those
paul@0 145
subprograms and other parts of the work.
paul@0 146
paul@0 147
  The Corresponding Source need not include anything that users
paul@0 148
can regenerate automatically from other parts of the Corresponding
paul@0 149
Source.
paul@0 150
paul@0 151
  The Corresponding Source for a work in source code form is that
paul@0 152
same work.
paul@0 153
paul@0 154
  2. Basic Permissions.
paul@0 155
paul@0 156
  All rights granted under this License are granted for the term of
paul@0 157
copyright on the Program, and are irrevocable provided the stated
paul@0 158
conditions are met.  This License explicitly affirms your unlimited
paul@0 159
permission to run the unmodified Program.  The output from running a
paul@0 160
covered work is covered by this License only if the output, given its
paul@0 161
content, constitutes a covered work.  This License acknowledges your
paul@0 162
rights of fair use or other equivalent, as provided by copyright law.
paul@0 163
paul@0 164
  You may make, run and propagate covered works that you do not
paul@0 165
convey, without conditions so long as your license otherwise remains
paul@0 166
in force.  You may convey covered works to others for the sole purpose
paul@0 167
of having them make modifications exclusively for you, or provide you
paul@0 168
with facilities for running those works, provided that you comply with
paul@0 169
the terms of this License in conveying all material for which you do
paul@0 170
not control copyright.  Those thus making or running the covered works
paul@0 171
for you must do so exclusively on your behalf, under your direction
paul@0 172
and control, on terms that prohibit them from making any copies of
paul@0 173
your copyrighted material outside their relationship with you.
paul@0 174
paul@0 175
  Conveying under any other circumstances is permitted solely under
paul@0 176
the conditions stated below.  Sublicensing is not allowed; section 10
paul@0 177
makes it unnecessary.
paul@0 178
paul@0 179
  3. Protecting Users' Legal Rights From Anti-Circumvention Law.
paul@0 180
paul@0 181
  No covered work shall be deemed part of an effective technological
paul@0 182
measure under any applicable law fulfilling obligations under article
paul@0 183
11 of the WIPO copyright treaty adopted on 20 December 1996, or
paul@0 184
similar laws prohibiting or restricting circumvention of such
paul@0 185
measures.
paul@0 186
paul@0 187
  When you convey a covered work, you waive any legal power to forbid
paul@0 188
circumvention of technological measures to the extent such circumvention
paul@0 189
is effected by exercising rights under this License with respect to
paul@0 190
the covered work, and you disclaim any intention to limit operation or
paul@0 191
modification of the work as a means of enforcing, against the work's
paul@0 192
users, your or third parties' legal rights to forbid circumvention of
paul@0 193
technological measures.
paul@0 194
paul@0 195
  4. Conveying Verbatim Copies.
paul@0 196
paul@0 197
  You may convey verbatim copies of the Program's source code as you
paul@0 198
receive it, in any medium, provided that you conspicuously and
paul@0 199
appropriately publish on each copy an appropriate copyright notice;
paul@0 200
keep intact all notices stating that this License and any
paul@0 201
non-permissive terms added in accord with section 7 apply to the code;
paul@0 202
keep intact all notices of the absence of any warranty; and give all
paul@0 203
recipients a copy of this License along with the Program.
paul@0 204
paul@0 205
  You may charge any price or no price for each copy that you convey,
paul@0 206
and you may offer support or warranty protection for a fee.
paul@0 207
paul@0 208
  5. Conveying Modified Source Versions.
paul@0 209
paul@0 210
  You may convey a work based on the Program, or the modifications to
paul@0 211
produce it from the Program, in the form of source code under the
paul@0 212
terms of section 4, provided that you also meet all of these conditions:
paul@0 213
paul@0 214
    a) The work must carry prominent notices stating that you modified
paul@0 215
    it, and giving a relevant date.
paul@0 216
paul@0 217
    b) The work must carry prominent notices stating that it is
paul@0 218
    released under this License and any conditions added under section
paul@0 219
    7.  This requirement modifies the requirement in section 4 to
paul@0 220
    "keep intact all notices".
paul@0 221
paul@0 222
    c) You must license the entire work, as a whole, under this
paul@0 223
    License to anyone who comes into possession of a copy.  This
paul@0 224
    License will therefore apply, along with any applicable section 7
paul@0 225
    additional terms, to the whole of the work, and all its parts,
paul@0 226
    regardless of how they are packaged.  This License gives no
paul@0 227
    permission to license the work in any other way, but it does not
paul@0 228
    invalidate such permission if you have separately received it.
paul@0 229
paul@0 230
    d) If the work has interactive user interfaces, each must display
paul@0 231
    Appropriate Legal Notices; however, if the Program has interactive
paul@0 232
    interfaces that do not display Appropriate Legal Notices, your
paul@0 233
    work need not make them do so.
paul@0 234
paul@0 235
  A compilation of a covered work with other separate and independent
paul@0 236
works, which are not by their nature extensions of the covered work,
paul@0 237
and which are not combined with it such as to form a larger program,
paul@0 238
in or on a volume of a storage or distribution medium, is called an
paul@0 239
"aggregate" if the compilation and its resulting copyright are not
paul@0 240
used to limit the access or legal rights of the compilation's users
paul@0 241
beyond what the individual works permit.  Inclusion of a covered work
paul@0 242
in an aggregate does not cause this License to apply to the other
paul@0 243
parts of the aggregate.
paul@0 244
paul@0 245
  6. Conveying Non-Source Forms.
paul@0 246
paul@0 247
  You may convey a covered work in object code form under the terms
paul@0 248
of sections 4 and 5, provided that you also convey the
paul@0 249
machine-readable Corresponding Source under the terms of this License,
paul@0 250
in one of these ways:
paul@0 251
paul@0 252
    a) Convey the object code in, or embodied in, a physical product
paul@0 253
    (including a physical distribution medium), accompanied by the
paul@0 254
    Corresponding Source fixed on a durable physical medium
paul@0 255
    customarily used for software interchange.
paul@0 256
paul@0 257
    b) Convey the object code in, or embodied in, a physical product
paul@0 258
    (including a physical distribution medium), accompanied by a
paul@0 259
    written offer, valid for at least three years and valid for as
paul@0 260
    long as you offer spare parts or customer support for that product
paul@0 261
    model, to give anyone who possesses the object code either (1) a
paul@0 262
    copy of the Corresponding Source for all the software in the
paul@0 263
    product that is covered by this License, on a durable physical
paul@0 264
    medium customarily used for software interchange, for a price no
paul@0 265
    more than your reasonable cost of physically performing this
paul@0 266
    conveying of source, or (2) access to copy the
paul@0 267
    Corresponding Source from a network server at no charge.
paul@0 268
paul@0 269
    c) Convey individual copies of the object code with a copy of the
paul@0 270
    written offer to provide the Corresponding Source.  This
paul@0 271
    alternative is allowed only occasionally and noncommercially, and
paul@0 272
    only if you received the object code with such an offer, in accord
paul@0 273
    with subsection 6b.
paul@0 274
paul@0 275
    d) Convey the object code by offering access from a designated
paul@0 276
    place (gratis or for a charge), and offer equivalent access to the
paul@0 277
    Corresponding Source in the same way through the same place at no
paul@0 278
    further charge.  You need not require recipients to copy the
paul@0 279
    Corresponding Source along with the object code.  If the place to
paul@0 280
    copy the object code is a network server, the Corresponding Source
paul@0 281
    may be on a different server (operated by you or a third party)
paul@0 282
    that supports equivalent copying facilities, provided you maintain
paul@0 283
    clear directions next to the object code saying where to find the
paul@0 284
    Corresponding Source.  Regardless of what server hosts the
paul@0 285
    Corresponding Source, you remain obligated to ensure that it is
paul@0 286
    available for as long as needed to satisfy these requirements.
paul@0 287
paul@0 288
    e) Convey the object code using peer-to-peer transmission, provided
paul@0 289
    you inform other peers where the object code and Corresponding
paul@0 290
    Source of the work are being offered to the general public at no
paul@0 291
    charge under subsection 6d.
paul@0 292
paul@0 293
  A separable portion of the object code, whose source code is excluded
paul@0 294
from the Corresponding Source as a System Library, need not be
paul@0 295
included in conveying the object code work.
paul@0 296
paul@0 297
  A "User Product" is either (1) a "consumer product", which means any
paul@0 298
tangible personal property which is normally used for personal, family,
paul@0 299
or household purposes, or (2) anything designed or sold for incorporation
paul@0 300
into a dwelling.  In determining whether a product is a consumer product,
paul@0 301
doubtful cases shall be resolved in favor of coverage.  For a particular
paul@0 302
product received by a particular user, "normally used" refers to a
paul@0 303
typical or common use of that class of product, regardless of the status
paul@0 304
of the particular user or of the way in which the particular user
paul@0 305
actually uses, or expects or is expected to use, the product.  A product
paul@0 306
is a consumer product regardless of whether the product has substantial
paul@0 307
commercial, industrial or non-consumer uses, unless such uses represent
paul@0 308
the only significant mode of use of the product.
paul@0 309
paul@0 310
  "Installation Information" for a User Product means any methods,
paul@0 311
procedures, authorization keys, or other information required to install
paul@0 312
and execute modified versions of a covered work in that User Product from
paul@0 313
a modified version of its Corresponding Source.  The information must
paul@0 314
suffice to ensure that the continued functioning of the modified object
paul@0 315
code is in no case prevented or interfered with solely because
paul@0 316
modification has been made.
paul@0 317
paul@0 318
  If you convey an object code work under this section in, or with, or
paul@0 319
specifically for use in, a User Product, and the conveying occurs as
paul@0 320
part of a transaction in which the right of possession and use of the
paul@0 321
User Product is transferred to the recipient in perpetuity or for a
paul@0 322
fixed term (regardless of how the transaction is characterized), the
paul@0 323
Corresponding Source conveyed under this section must be accompanied
paul@0 324
by the Installation Information.  But this requirement does not apply
paul@0 325
if neither you nor any third party retains the ability to install
paul@0 326
modified object code on the User Product (for example, the work has
paul@0 327
been installed in ROM).
paul@0 328
paul@0 329
  The requirement to provide Installation Information does not include a
paul@0 330
requirement to continue to provide support service, warranty, or updates
paul@0 331
for a work that has been modified or installed by the recipient, or for
paul@0 332
the User Product in which it has been modified or installed.  Access to a
paul@0 333
network may be denied when the modification itself materially and
paul@0 334
adversely affects the operation of the network or violates the rules and
paul@0 335
protocols for communication across the network.
paul@0 336
paul@0 337
  Corresponding Source conveyed, and Installation Information provided,
paul@0 338
in accord with this section must be in a format that is publicly
paul@0 339
documented (and with an implementation available to the public in
paul@0 340
source code form), and must require no special password or key for
paul@0 341
unpacking, reading or copying.
paul@0 342
paul@0 343
  7. Additional Terms.
paul@0 344
paul@0 345
  "Additional permissions" are terms that supplement the terms of this
paul@0 346
License by making exceptions from one or more of its conditions.
paul@0 347
Additional permissions that are applicable to the entire Program shall
paul@0 348
be treated as though they were included in this License, to the extent
paul@0 349
that they are valid under applicable law.  If additional permissions
paul@0 350
apply only to part of the Program, that part may be used separately
paul@0 351
under those permissions, but the entire Program remains governed by
paul@0 352
this License without regard to the additional permissions.
paul@0 353
paul@0 354
  When you convey a copy of a covered work, you may at your option
paul@0 355
remove any additional permissions from that copy, or from any part of
paul@0 356
it.  (Additional permissions may be written to require their own
paul@0 357
removal in certain cases when you modify the work.)  You may place
paul@0 358
additional permissions on material, added by you to a covered work,
paul@0 359
for which you have or can give appropriate copyright permission.
paul@0 360
paul@0 361
  Notwithstanding any other provision of this License, for material you
paul@0 362
add to a covered work, you may (if authorized by the copyright holders of
paul@0 363
that material) supplement the terms of this License with terms:
paul@0 364
paul@0 365
    a) Disclaiming warranty or limiting liability differently from the
paul@0 366
    terms of sections 15 and 16 of this License; or
paul@0 367
paul@0 368
    b) Requiring preservation of specified reasonable legal notices or
paul@0 369
    author attributions in that material or in the Appropriate Legal
paul@0 370
    Notices displayed by works containing it; or
paul@0 371
paul@0 372
    c) Prohibiting misrepresentation of the origin of that material, or
paul@0 373
    requiring that modified versions of such material be marked in
paul@0 374
    reasonable ways as different from the original version; or
paul@0 375
paul@0 376
    d) Limiting the use for publicity purposes of names of licensors or
paul@0 377
    authors of the material; or
paul@0 378
paul@0 379
    e) Declining to grant rights under trademark law for use of some
paul@0 380
    trade names, trademarks, or service marks; or
paul@0 381
paul@0 382
    f) Requiring indemnification of licensors and authors of that
paul@0 383
    material by anyone who conveys the material (or modified versions of
paul@0 384
    it) with contractual assumptions of liability to the recipient, for
paul@0 385
    any liability that these contractual assumptions directly impose on
paul@0 386
    those licensors and authors.
paul@0 387
paul@0 388
  All other non-permissive additional terms are considered "further
paul@0 389
restrictions" within the meaning of section 10.  If the Program as you
paul@0 390
received it, or any part of it, contains a notice stating that it is
paul@0 391
governed by this License along with a term that is a further
paul@0 392
restriction, you may remove that term.  If a license document contains
paul@0 393
a further restriction but permits relicensing or conveying under this
paul@0 394
License, you may add to a covered work material governed by the terms
paul@0 395
of that license document, provided that the further restriction does
paul@0 396
not survive such relicensing or conveying.
paul@0 397
paul@0 398
  If you add terms to a covered work in accord with this section, you
paul@0 399
must place, in the relevant source files, a statement of the
paul@0 400
additional terms that apply to those files, or a notice indicating
paul@0 401
where to find the applicable terms.
paul@0 402
paul@0 403
  Additional terms, permissive or non-permissive, may be stated in the
paul@0 404
form of a separately written license, or stated as exceptions;
paul@0 405
the above requirements apply either way.
paul@0 406
paul@0 407
  8. Termination.
paul@0 408
paul@0 409
  You may not propagate or modify a covered work except as expressly
paul@0 410
provided under this License.  Any attempt otherwise to propagate or
paul@0 411
modify it is void, and will automatically terminate your rights under
paul@0 412
this License (including any patent licenses granted under the third
paul@0 413
paragraph of section 11).
paul@0 414
paul@0 415
  However, if you cease all violation of this License, then your
paul@0 416
license from a particular copyright holder is reinstated (a)
paul@0 417
provisionally, unless and until the copyright holder explicitly and
paul@0 418
finally terminates your license, and (b) permanently, if the copyright
paul@0 419
holder fails to notify you of the violation by some reasonable means
paul@0 420
prior to 60 days after the cessation.
paul@0 421
paul@0 422
  Moreover, your license from a particular copyright holder is
paul@0 423
reinstated permanently if the copyright holder notifies you of the
paul@0 424
violation by some reasonable means, this is the first time you have
paul@0 425
received notice of violation of this License (for any work) from that
paul@0 426
copyright holder, and you cure the violation prior to 30 days after
paul@0 427
your receipt of the notice.
paul@0 428
paul@0 429
  Termination of your rights under this section does not terminate the
paul@0 430
licenses of parties who have received copies or rights from you under
paul@0 431
this License.  If your rights have been terminated and not permanently
paul@0 432
reinstated, you do not qualify to receive new licenses for the same
paul@0 433
material under section 10.
paul@0 434
paul@0 435
  9. Acceptance Not Required for Having Copies.
paul@0 436
paul@0 437
  You are not required to accept this License in order to receive or
paul@0 438
run a copy of the Program.  Ancillary propagation of a covered work
paul@0 439
occurring solely as a consequence of using peer-to-peer transmission
paul@0 440
to receive a copy likewise does not require acceptance.  However,
paul@0 441
nothing other than this License grants you permission to propagate or
paul@0 442
modify any covered work.  These actions infringe copyright if you do
paul@0 443
not accept this License.  Therefore, by modifying or propagating a
paul@0 444
covered work, you indicate your acceptance of this License to do so.
paul@0 445
paul@0 446
  10. Automatic Licensing of Downstream Recipients.
paul@0 447
paul@0 448
  Each time you convey a covered work, the recipient automatically
paul@0 449
receives a license from the original licensors, to run, modify and
paul@0 450
propagate that work, subject to this License.  You are not responsible
paul@0 451
for enforcing compliance by third parties with this License.
paul@0 452
paul@0 453
  An "entity transaction" is a transaction transferring control of an
paul@0 454
organization, or substantially all assets of one, or subdividing an
paul@0 455
organization, or merging organizations.  If propagation of a covered
paul@0 456
work results from an entity transaction, each party to that
paul@0 457
transaction who receives a copy of the work also receives whatever
paul@0 458
licenses to the work the party's predecessor in interest had or could
paul@0 459
give under the previous paragraph, plus a right to possession of the
paul@0 460
Corresponding Source of the work from the predecessor in interest, if
paul@0 461
the predecessor has it or can get it with reasonable efforts.
paul@0 462
paul@0 463
  You may not impose any further restrictions on the exercise of the
paul@0 464
rights granted or affirmed under this License.  For example, you may
paul@0 465
not impose a license fee, royalty, or other charge for exercise of
paul@0 466
rights granted under this License, and you may not initiate litigation
paul@0 467
(including a cross-claim or counterclaim in a lawsuit) alleging that
paul@0 468
any patent claim is infringed by making, using, selling, offering for
paul@0 469
sale, or importing the Program or any portion of it.
paul@0 470
paul@0 471
  11. Patents.
paul@0 472
paul@0 473
  A "contributor" is a copyright holder who authorizes use under this
paul@0 474
License of the Program or a work on which the Program is based.  The
paul@0 475
work thus licensed is called the contributor's "contributor version".
paul@0 476
paul@0 477
  A contributor's "essential patent claims" are all patent claims
paul@0 478
owned or controlled by the contributor, whether already acquired or
paul@0 479
hereafter acquired, that would be infringed by some manner, permitted
paul@0 480
by this License, of making, using, or selling its contributor version,
paul@0 481
but do not include claims that would be infringed only as a
paul@0 482
consequence of further modification of the contributor version.  For
paul@0 483
purposes of this definition, "control" includes the right to grant
paul@0 484
patent sublicenses in a manner consistent with the requirements of
paul@0 485
this License.
paul@0 486
paul@0 487
  Each contributor grants you a non-exclusive, worldwide, royalty-free
paul@0 488
patent license under the contributor's essential patent claims, to
paul@0 489
make, use, sell, offer for sale, import and otherwise run, modify and
paul@0 490
propagate the contents of its contributor version.
paul@0 491
paul@0 492
  In the following three paragraphs, a "patent license" is any express
paul@0 493
agreement or commitment, however denominated, not to enforce a patent
paul@0 494
(such as an express permission to practice a patent or covenant not to
paul@0 495
sue for patent infringement).  To "grant" such a patent license to a
paul@0 496
party means to make such an agreement or commitment not to enforce a
paul@0 497
patent against the party.
paul@0 498
paul@0 499
  If you convey a covered work, knowingly relying on a patent license,
paul@0 500
and the Corresponding Source of the work is not available for anyone
paul@0 501
to copy, free of charge and under the terms of this License, through a
paul@0 502
publicly available network server or other readily accessible means,
paul@0 503
then you must either (1) cause the Corresponding Source to be so
paul@0 504
available, or (2) arrange to deprive yourself of the benefit of the
paul@0 505
patent license for this particular work, or (3) arrange, in a manner
paul@0 506
consistent with the requirements of this License, to extend the patent
paul@0 507
license to downstream recipients.  "Knowingly relying" means you have
paul@0 508
actual knowledge that, but for the patent license, your conveying the
paul@0 509
covered work in a country, or your recipient's use of the covered work
paul@0 510
in a country, would infringe one or more identifiable patents in that
paul@0 511
country that you have reason to believe are valid.
paul@0 512
paul@0 513
  If, pursuant to or in connection with a single transaction or
paul@0 514
arrangement, you convey, or propagate by procuring conveyance of, a
paul@0 515
covered work, and grant a patent license to some of the parties
paul@0 516
receiving the covered work authorizing them to use, propagate, modify
paul@0 517
or convey a specific copy of the covered work, then the patent license
paul@0 518
you grant is automatically extended to all recipients of the covered
paul@0 519
work and works based on it.
paul@0 520
paul@0 521
  A patent license is "discriminatory" if it does not include within
paul@0 522
the scope of its coverage, prohibits the exercise of, or is
paul@0 523
conditioned on the non-exercise of one or more of the rights that are
paul@0 524
specifically granted under this License.  You may not convey a covered
paul@0 525
work if you are a party to an arrangement with a third party that is
paul@0 526
in the business of distributing software, under which you make payment
paul@0 527
to the third party based on the extent of your activity of conveying
paul@0 528
the work, and under which the third party grants, to any of the
paul@0 529
parties who would receive the covered work from you, a discriminatory
paul@0 530
patent license (a) in connection with copies of the covered work
paul@0 531
conveyed by you (or copies made from those copies), or (b) primarily
paul@0 532
for and in connection with specific products or compilations that
paul@0 533
contain the covered work, unless you entered into that arrangement,
paul@0 534
or that patent license was granted, prior to 28 March 2007.
paul@0 535
paul@0 536
  Nothing in this License shall be construed as excluding or limiting
paul@0 537
any implied license or other defenses to infringement that may
paul@0 538
otherwise be available to you under applicable patent law.
paul@0 539
paul@0 540
  12. No Surrender of Others' Freedom.
paul@0 541
paul@0 542
  If conditions are imposed on you (whether by court order, agreement or
paul@0 543
otherwise) that contradict the conditions of this License, they do not
paul@0 544
excuse you from the conditions of this License.  If you cannot convey a
paul@0 545
covered work so as to satisfy simultaneously your obligations under this
paul@0 546
License and any other pertinent obligations, then as a consequence you may
paul@0 547
not convey it at all.  For example, if you agree to terms that obligate you
paul@0 548
to collect a royalty for further conveying from those to whom you convey
paul@0 549
the Program, the only way you could satisfy both those terms and this
paul@0 550
License would be to refrain entirely from conveying the Program.
paul@0 551
paul@0 552
  13. Use with the GNU Affero General Public License.
paul@0 553
paul@0 554
  Notwithstanding any other provision of this License, you have
paul@0 555
permission to link or combine any covered work with a work licensed
paul@0 556
under version 3 of the GNU Affero General Public License into a single
paul@0 557
combined work, and to convey the resulting work.  The terms of this
paul@0 558
License will continue to apply to the part which is the covered work,
paul@0 559
but the special requirements of the GNU Affero General Public License,
paul@0 560
section 13, concerning interaction through a network will apply to the
paul@0 561
combination as such.
paul@0 562
paul@0 563
  14. Revised Versions of this License.
paul@0 564
paul@0 565
  The Free Software Foundation may publish revised and/or new versions of
paul@0 566
the GNU General Public License from time to time.  Such new versions will
paul@0 567
be similar in spirit to the present version, but may differ in detail to
paul@0 568
address new problems or concerns.
paul@0 569
paul@0 570
  Each version is given a distinguishing version number.  If the
paul@0 571
Program specifies that a certain numbered version of the GNU General
paul@0 572
Public License "or any later version" applies to it, you have the
paul@0 573
option of following the terms and conditions either of that numbered
paul@0 574
version or of any later version published by the Free Software
paul@0 575
Foundation.  If the Program does not specify a version number of the
paul@0 576
GNU General Public License, you may choose any version ever published
paul@0 577
by the Free Software Foundation.
paul@0 578
paul@0 579
  If the Program specifies that a proxy can decide which future
paul@0 580
versions of the GNU General Public License can be used, that proxy's
paul@0 581
public statement of acceptance of a version permanently authorizes you
paul@0 582
to choose that version for the Program.
paul@0 583
paul@0 584
  Later license versions may give you additional or different
paul@0 585
permissions.  However, no additional obligations are imposed on any
paul@0 586
author or copyright holder as a result of your choosing to follow a
paul@0 587
later version.
paul@0 588
paul@0 589
  15. Disclaimer of Warranty.
paul@0 590
paul@0 591
  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
paul@0 592
APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
paul@0 593
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
paul@0 594
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
paul@0 595
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
paul@0 596
PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
paul@0 597
IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
paul@0 598
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
paul@0 599
paul@0 600
  16. Limitation of Liability.
paul@0 601
paul@0 602
  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
paul@0 603
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
paul@0 604
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
paul@0 605
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
paul@0 606
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
paul@0 607
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
paul@0 608
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
paul@0 609
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
paul@0 610
SUCH DAMAGES.
paul@0 611
paul@0 612
  17. Interpretation of Sections 15 and 16.
paul@0 613
paul@0 614
  If the disclaimer of warranty and limitation of liability provided
paul@0 615
above cannot be given local legal effect according to their terms,
paul@0 616
reviewing courts shall apply local law that most closely approximates
paul@0 617
an absolute waiver of all civil liability in connection with the
paul@0 618
Program, unless a warranty or assumption of liability accompanies a
paul@0 619
copy of the Program in return for a fee.
paul@0 620
paul@0 621
                     END OF TERMS AND CONDITIONS
paul@0 622
paul@0 623
            How to Apply These Terms to Your New Programs
paul@0 624
paul@0 625
  If you develop a new program, and you want it to be of the greatest
paul@0 626
possible use to the public, the best way to achieve this is to make it
paul@0 627
free software which everyone can redistribute and change under these terms.
paul@0 628
paul@0 629
  To do so, attach the following notices to the program.  It is safest
paul@0 630
to attach them to the start of each source file to most effectively
paul@0 631
state the exclusion of warranty; and each file should have at least
paul@0 632
the "copyright" line and a pointer to where the full notice is found.
paul@0 633
paul@0 634
    <one line to give the program's name and a brief idea of what it does.>
paul@0 635
    Copyright (C) <year>  <name of author>
paul@0 636
paul@0 637
    This program is free software: you can redistribute it and/or modify
paul@0 638
    it under the terms of the GNU General Public License as published by
paul@0 639
    the Free Software Foundation, either version 3 of the License, or
paul@0 640
    (at your option) any later version.
paul@0 641
paul@0 642
    This program is distributed in the hope that it will be useful,
paul@0 643
    but WITHOUT ANY WARRANTY; without even the implied warranty of
paul@0 644
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
paul@0 645
    GNU General Public License for more details.
paul@0 646
paul@0 647
    You should have received a copy of the GNU General Public License
paul@0 648
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
paul@0 649
paul@0 650
Also add information on how to contact you by electronic and paper mail.
paul@0 651
paul@0 652
  If the program does terminal interaction, make it output a short
paul@0 653
notice like this when it starts in an interactive mode:
paul@0 654
paul@0 655
    <program>  Copyright (C) <year>  <name of author>
paul@0 656
    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
paul@0 657
    This is free software, and you are welcome to redistribute it
paul@0 658
    under certain conditions; type `show c' for details.
paul@0 659
paul@0 660
The hypothetical commands `show w' and `show c' should show the appropriate
paul@0 661
parts of the General Public License.  Of course, your program's commands
paul@0 662
might be different; for a GUI interface, you would use an "about box".
paul@0 663
paul@0 664
  You should also get your employer (if you work as a programmer) or school,
paul@0 665
if any, to sign a "copyright disclaimer" for the program, if necessary.
paul@0 666
For more information on this, and how to apply and follow the GNU GPL, see
paul@0 667
<http://www.gnu.org/licenses/>.
paul@0 668
paul@0 669
  The GNU General Public License does not permit incorporating your program
paul@0 670
into proprietary programs.  If your program is a subroutine library, you
paul@0 671
may consider it more useful to permit linking proprietary applications with
paul@0 672
the library.  If this is what you want to do, use the GNU Lesser General
paul@0 673
Public License instead of this License.  But first, please read
paul@0 674
<http://www.gnu.org/philosophy/why-not-lgpl.html>.