1Valid-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later 2Valid-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-only 3Valid-License-Identifier: GFDL-1.1-no-invariants-or-later 4Valid-License-Identifier: GFDL-1.1-no-invariants-only 5SPDX-URL: https://spdx.org/licenses/GFDL-1.1-no-invariants-or-later.html 6Usage-Guide: 7 The GNU Free Documentation License should only be used without 8 Invariant Sections, Front-Cover Texts or Back-Cover Texts. 9 It should not be used for new documents, except when they are 10 part of sections that are already using it (notably, the 11 userspace-api media documentation). 12 To use the license in source code, put the following SPDX tag/value pair 13 into a comment according to the placement guidelines in the licensing 14 rules documentation: 15 SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later 16 or 17 SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-only 18 or 19 SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 20 or 21 SPDX-License-Identifier: GFDL-1.1-no-invariants-only 22License-Text: 23 GNU Free Documentation License 24 Version 1.1, March 2000 25 26 Copyright (C) 2000 Free Software Foundation, Inc. 27 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 28 Everyone is permitted to copy and distribute verbatim copies 29 of this license document, but changing it is not allowed. 30 31 320. PREAMBLE 33 34The purpose of this License is to make a manual, textbook, or other 35written document "free" in the sense of freedom: to assure everyone 36the effective freedom to copy and redistribute it, with or without 37modifying it, either commercially or noncommercially. Secondarily, 38this License preserves for the author and publisher a way to get 39credit for their work, while not being considered responsible for 40modifications made by others. 41 42This License is a kind of "copyleft", which means that derivative 43works of the document must themselves be free in the same sense. It 44complements the GNU General Public License, which is a copyleft 45license designed for free software. 46 47We have designed this License in order to use it for manuals for free 48software, because free software needs free documentation: a free 49program should come with manuals providing the same freedoms that the 50software does. But this License is not limited to software manuals; 51it can be used for any textual work, regardless of subject matter or 52whether it is published as a printed book. We recommend this License 53principally for works whose purpose is instruction or reference. 54 55 561. APPLICABILITY AND DEFINITIONS 57 58This License applies to any manual or other work that contains a 59notice placed by the copyright holder saying it can be distributed 60under the terms of this License. The "Document", below, refers to any 61such manual or work. 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MODIFICATIONS 172 173You may copy and distribute a Modified Version of the Document under 174the conditions of sections 2 and 3 above, provided that you release 175the Modified Version under precisely this License, with the Modified 176Version filling the role of the Document, thus licensing distribution 177and modification of the Modified Version to whoever possesses a copy 178of it. In addition, you must do these things in the Modified Version: 179 180A. Use in the Title Page (and on the covers, if any) a title distinct 181 from that of the Document, and from those of previous versions 182 (which should, if there were any, be listed in the History section 183 of the Document). You may use the same title as a previous version 184 if the original publisher of that version gives permission. 185B. 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COMBINING DOCUMENTS 255 256You may combine the Document with other documents released under this 257License, under the terms defined in section 4 above for modified 258versions, provided that you include in the combination all of the 259Invariant Sections of all of the original documents, unmodified, and 260list them all as Invariant Sections of your combined work in its 261license notice. 262 263The combined work need only contain one copy of this License, and 264multiple identical Invariant Sections may be replaced with a single 265copy. 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COLLECTIONS OF DOCUMENTS 280 281You may make a collection consisting of the Document and other documents 282released under this License, and replace the individual copies of this 283License in the various documents with a single copy that is included in 284the collection, provided that you follow the rules of this License for 285verbatim copying of each of the documents in all other respects. 286 287You may extract a single document from such a collection, and distribute 288it individually under this License, provided you insert a copy of this 289License into the extracted document, and follow this License in all 290other respects regarding verbatim copying of that document. 291 292 2937. AGGREGATION WITH INDEPENDENT WORKS 294 295A compilation of the Document or its derivatives with other separate 296and independent documents or works, in or on a volume of a storage or 297distribution medium, does not as a whole count as a Modified Version 298of the Document, provided no compilation copyright is claimed for the 299compilation. Such a compilation is called an "aggregate", and this 300License does not apply to the other self-contained works thus compiled 301with the Document, on account of their being thus compiled, if they 302are not themselves derivative works of the Document. 303 304If the Cover Text requirement of section 3 is applicable to these 305copies of the Document, then if the Document is less than one quarter 306of the entire aggregate, the Document's Cover Texts may be placed on 307covers that surround only the Document within the aggregate. 308Otherwise they must appear on covers around the whole aggregate. 309 310 3118. TRANSLATION 312 313Translation is considered a kind of modification, so you may 314distribute translations of the Document under the terms of section 4. 315Replacing Invariant Sections with translations requires special 316permission from their copyright holders, but you may include 317translations of some or all Invariant Sections in addition to the 318original versions of these Invariant Sections. You may include a 319translation of this License provided that you also include the 320original English version of this License. In case of a disagreement 321between the translation and the original English version of this 322License, the original English version will prevail. 323 324 3259. TERMINATION 326 327You may not copy, modify, sublicense, or distribute the Document except 328as expressly provided for under this License. Any other attempt to 329copy, modify, sublicense or distribute the Document is void, and will 330automatically terminate your rights under this License. However, 331parties who have received copies, or rights, from you under this 332License will not have their licenses terminated so long as such 333parties remain in full compliance. 334 335 33610. FUTURE REVISIONS OF THIS LICENSE 337 338The Free Software Foundation may publish new, revised versions 339of the GNU Free Documentation License from time to time. Such new 340versions will be similar in spirit to the present version, but may 341differ in detail to address new problems or concerns. See 342https://www.gnu.org/licenses/. 343 344Each version of the License is given a distinguishing version number. 345If the Document specifies that a particular numbered version of this 346License "or any later version" applies to it, you have the option of 347following the terms and conditions either of that specified version or 348of any later version that has been published (not as a draft) by the 349Free Software Foundation. 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