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PREAMBLE 1269626Sru 1369626SruThe purpose of this License is to make a manual, textbook, or other 14151497Srufunctional and useful document "free" in the sense of freedom: to 15151497Sruassure everyone the effective freedom to copy and redistribute it, 16151497Sruwith or without modifying it, either commercially or noncommercially. 17151497SruSecondarily, this License preserves for the author and publisher a way 18151497Sruto get credit for their work, while not being considered responsible 19151497Srufor modifications made by others. 2069626Sru 2169626SruThis License is a kind of "copyleft", which means that derivative 2269626Sruworks of the document must themselves be free in the same sense. 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List on the Title Page, as authors, one or more persons or entities 19169626Sru responsible for authorship of the modifications in the Modified 19269626Sru Version, together with at least five of the principal authors of the 193151497Sru Document (all of its principal authors, if it has fewer than five), 194151497Sru unless they release you from this requirement. 19569626SruC. State on the Title page the name of the publisher of the 19669626Sru Modified Version, as the publisher. 19769626SruD. Preserve all the copyright notices of the Document. 19869626SruE. Add an appropriate copyright notice for your modifications 19969626Sru adjacent to the other copyright notices. 20069626SruF. Include, immediately after the copyright notices, a license notice 20169626Sru giving the public permission to use the Modified Version under the 20269626Sru terms of this License, in the form shown in the Addendum below. 20369626SruG. Preserve in that license notice the full lists of Invariant Sections 20469626Sru and required Cover Texts given in the Document's license notice. 20569626SruH. Include an unaltered copy of this License. 206151497SruI. Preserve the section Entitled "History", Preserve its Title, and add 207151497Sru to it an item stating at least the title, year, new authors, and 20869626Sru publisher of the Modified Version as given on the Title Page. If 209151497Sru there is no section Entitled "History" in the Document, create one 21069626Sru stating the title, year, authors, and publisher of the Document as 21169626Sru given on its Title Page, then add an item describing the Modified 21269626Sru Version as stated in the previous sentence. 21369626SruJ. Preserve the network location, if any, given in the Document for 21469626Sru public access to a Transparent copy of the Document, and likewise 21569626Sru the network locations given in the Document for previous versions 21669626Sru it was based on. 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Do not retitle any existing section to be Entitled "Endorsements" 23069626Sru or to conflict in title with any Invariant Section. 231151497SruO. Preserve any Warranty Disclaimers. 23269626Sru 23369626SruIf the Modified Version includes new front-matter sections or 23469626Sruappendices that qualify as Secondary Sections and contain no material 23569626Srucopied from the Document, you may at your option designate some or all 23669626Sruof these sections as invariant. To do this, add their titles to the 23769626Srulist of Invariant Sections in the Modified Version's license notice. 23869626SruThese titles must be distinct from any other section titles. 23969626Sru 240151497SruYou may add a section Entitled "Endorsements", provided it contains 24169626Srunothing but endorsements of your Modified Version by various 24269626Sruparties--for example, statements of peer review or that the text has 24369626Srubeen approved by an organization as the authoritative definition of a 24469626Srustandard. 24569626Sru 24669626SruYou may add a passage of up to five words as a Front-Cover Text, and a 24769626Srupassage of up to 25 words as a Back-Cover Text, to the end of the list 24869626Sruof Cover Texts in the Modified Version. Only one passage of 24969626SruFront-Cover Text and one of Back-Cover Text may be added by (or 25069626Sruthrough arrangements made by) any one entity. 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COMBINING DOCUMENTS 26269626Sru 26369626SruYou may combine the Document with other documents released under this 26469626SruLicense, under the terms defined in section 4 above for modified 26569626Sruversions, provided that you include in the combination all of the 26669626SruInvariant Sections of all of the original documents, unmodified, and 26769626Srulist them all as Invariant Sections of your combined work in its 268151497Srulicense notice, and that you preserve all their Warranty Disclaimers. 26969626Sru 27069626SruThe combined work need only contain one copy of this License, and 27169626Srumultiple identical Invariant Sections may be replaced with a single 27269626Srucopy. If there are multiple Invariant Sections with the same name but 27369626Srudifferent contents, make the title of each such section unique by 27469626Sruadding at the end of it, in parentheses, the name of the original 27569626Sruauthor or publisher of that section if known, or else a unique number. 27669626SruMake the same adjustment to the section titles in the list of 27769626SruInvariant Sections in the license notice of the combined work. 27869626Sru 279151497SruIn the combination, you must combine any sections Entitled "History" 280151497Sruin the various original documents, forming one section Entitled 281151497Sru"History"; likewise combine any sections Entitled "Acknowledgements", 282151497Sruand any sections Entitled "Dedications". You must delete all sections 283151497SruEntitled "Endorsements". 28469626Sru 28569626Sru 28669626Sru6. COLLECTIONS OF DOCUMENTS 28769626Sru 28869626SruYou may make a collection consisting of the Document and other documents 28969626Srureleased under this License, and replace the individual copies of this 29069626SruLicense in the various documents with a single copy that is included in 29169626Sruthe collection, provided that you follow the rules of this License for 29269626Sruverbatim copying of each of the documents in all other respects. 29369626Sru 29469626SruYou may extract a single document from such a collection, and distribute 29569626Sruit individually under this License, provided you insert a copy of this 29669626SruLicense into the extracted document, and follow this License in all 29769626Sruother respects regarding verbatim copying of that document. 29869626Sru 29969626Sru 30069626Sru7. AGGREGATION WITH INDEPENDENT WORKS 30169626Sru 30269626SruA compilation of the Document or its derivatives with other separate 30369626Sruand independent documents or works, in or on a volume of a storage or 304151497Srudistribution medium, is called an "aggregate" if the copyright 305151497Sruresulting from the compilation is not used to limit the legal rights 306151497Sruof the compilation's users beyond what the individual works permit. 307151497SruWhen the Document is included in an aggregate, this License does not 308151497Sruapply to the other works in the aggregate which are not themselves 309151497Sruderivative works of the Document. 31069626Sru 31169626SruIf the Cover Text requirement of section 3 is applicable to these 312151497Srucopies of the Document, then if the Document is less than one half of 313151497Sruthe entire aggregate, the Document's Cover Texts may be placed on 314151497Srucovers that bracket the Document within the aggregate, or the 315151497Sruelectronic equivalent of covers if the Document is in electronic form. 316151497SruOtherwise they must appear on printed covers that bracket the whole 317151497Sruaggregate. 31869626Sru 31969626Sru 32069626Sru8. TRANSLATION 32169626Sru 32269626SruTranslation is considered a kind of modification, so you may 32369626Srudistribute translations of the Document under the terms of section 4. 32469626SruReplacing Invariant Sections with translations requires special 32569626Srupermission from their copyright holders, but you may include 32669626Srutranslations of some or all Invariant Sections in addition to the 32769626Sruoriginal versions of these Invariant Sections. You may include a 328151497Srutranslation of this License, and all the license notices in the 329151497SruDocument, and any Warranty Disclaimers, provided that you also include 330151497Sruthe original English version of this License and the original versions 331151497Sruof those notices and disclaimers. In case of a disagreement between 332151497Sruthe translation and the original version of this License or a notice 333151497Sruor disclaimer, the original version will prevail. 33469626Sru 335151497SruIf a section in the Document is Entitled "Acknowledgements", 336151497Sru"Dedications", or "History", the requirement (section 4) to Preserve 337151497Sruits Title (section 1) will typically require changing the actual 338151497Srutitle. 33969626Sru 340151497Sru 34169626Sru9. TERMINATION 34269626Sru 34369626SruYou may not copy, modify, sublicense, or distribute the Document except 34469626Sruas expressly provided for under this License. Any other attempt to 34569626Srucopy, modify, sublicense or distribute the Document is void, and will 34669626Sruautomatically terminate your rights under this License. However, 34769626Sruparties who have received copies, or rights, from you under this 34869626SruLicense will not have their licenses terminated so long as such 34969626Sruparties remain in full compliance. 35069626Sru 35169626Sru 35269626Sru10. FUTURE REVISIONS OF THIS LICENSE 35369626Sru 35469626SruThe Free Software Foundation may publish new, revised versions 35569626Sruof the GNU Free Documentation License from time to time. Such new 35669626Sruversions will be similar in spirit to the present version, but may 357151497Srudiffer in detail to address new problems or concerns. 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If the Document does not specify a version 36669626Srunumber of this License, you may choose any version ever published (not 36769626Sruas a draft) by the Free Software Foundation. 36869626Sru 36969626Sru 37069626SruADDENDUM: How to use this License for your documents 37169626Sru 37269626SruTo use this License in a document you have written, include a copy of 37369626Sruthe License in the document and put the following copyright and 37469626Srulicense notices just after the title page: 37569626Sru 376151497Sru Copyright (c) YEAR YOUR NAME. 377151497Sru Permission is granted to copy, distribute and/or modify this document 378151497Sru under the terms of the GNU Free Documentation License, Version 1.2 379151497Sru or any later version published by the Free Software Foundation; 380151497Sru with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. 381151497Sru A copy of the license is included in the section entitled "GNU 382151497Sru Free Documentation License". 38369626Sru 384151497SruIf you have Invariant Sections, Front-Cover Texts and Back-Cover Texts, 385151497Srureplace the "with...Texts." line with this: 38669626Sru 387151497Sru with the Invariant Sections being LIST THEIR TITLES, with the 388151497Sru Front-Cover Texts being LIST, and with the Back-Cover Texts being LIST. 389151497Sru 390151497SruIf you have Invariant Sections without Cover Texts, or some other 391151497Srucombination of the three, merge those two alternatives to suit the 392151497Srusituation. 393151497Sru 39469626SruIf your document contains nontrivial examples of program code, we 39569626Srurecommend releasing these examples in parallel under your choice of 39669626Srufree software license, such as the GNU General Public License, 39769626Sruto permit their use in free software. 398