1*4882a593Smuzhiyun GNU Free Documentation License 2*4882a593Smuzhiyun Version 1.1, March 2000 3*4882a593Smuzhiyun 4*4882a593Smuzhiyun Copyright (C) 2000 Free Software Foundation, Inc. 5*4882a593Smuzhiyun 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 6*4882a593Smuzhiyun Everyone is permitted to copy and distribute verbatim copies 7*4882a593Smuzhiyun of this license document, but changing it is not allowed. 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun0. PREAMBLE 11*4882a593Smuzhiyun 12*4882a593SmuzhiyunThe purpose of this License is to make a manual, textbook, or other 13*4882a593Smuzhiyunwritten document "free" in the sense of freedom: to assure everyone 14*4882a593Smuzhiyunthe effective freedom to copy and redistribute it, with or without 15*4882a593Smuzhiyunmodifying it, either commercially or noncommercially. Secondarily, 16*4882a593Smuzhiyunthis License preserves for the author and publisher a way to get 17*4882a593Smuzhiyuncredit for their work, while not being considered responsible for 18*4882a593Smuzhiyunmodifications made by others. 19*4882a593Smuzhiyun 20*4882a593SmuzhiyunThis License is a kind of "copyleft", which means that derivative 21*4882a593Smuzhiyunworks of the document must themselves be free in the same sense. It 22*4882a593Smuzhiyuncomplements the GNU General Public License, which is a copyleft 23*4882a593Smuzhiyunlicense designed for free software. 24*4882a593Smuzhiyun 25*4882a593SmuzhiyunWe have designed this License in order to use it for manuals for free 26*4882a593Smuzhiyunsoftware, because free software needs free documentation: a free 27*4882a593Smuzhiyunprogram should come with manuals providing the same freedoms that the 28*4882a593Smuzhiyunsoftware does. But this License is not limited to software manuals; 29*4882a593Smuzhiyunit can be used for any textual work, regardless of subject matter or 30*4882a593Smuzhiyunwhether it is published as a printed book. We recommend this License 31*4882a593Smuzhiyunprincipally for works whose purpose is instruction or reference. 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun1. APPLICABILITY AND DEFINITIONS 35*4882a593Smuzhiyun 36*4882a593SmuzhiyunThis License applies to any manual or other work that contains a 37*4882a593Smuzhiyunnotice placed by the copyright holder saying it can be distributed 38*4882a593Smuzhiyununder the terms of this License. The "Document", below, refers to any 39*4882a593Smuzhiyunsuch manual or work. Any member of the public is a licensee, and is 40*4882a593Smuzhiyunaddressed as "you". 41*4882a593Smuzhiyun 42*4882a593SmuzhiyunA "Modified Version" of the Document means any work containing the 43*4882a593SmuzhiyunDocument or a portion of it, either copied verbatim, or with 44*4882a593Smuzhiyunmodifications and/or translated into another language. 45*4882a593Smuzhiyun 46*4882a593SmuzhiyunA "Secondary Section" is a named appendix or a front-matter section of 47*4882a593Smuzhiyunthe Document that deals exclusively with the relationship of the 48*4882a593Smuzhiyunpublishers or authors of the Document to the Document's overall subject 49*4882a593Smuzhiyun(or to related matters) and contains nothing that could fall directly 50*4882a593Smuzhiyunwithin that overall subject. (For example, if the Document is in part a 51*4882a593Smuzhiyuntextbook of mathematics, a Secondary Section may not explain any 52*4882a593Smuzhiyunmathematics.) The relationship could be a matter of historical 53*4882a593Smuzhiyunconnection with the subject or with related matters, or of legal, 54*4882a593Smuzhiyuncommercial, philosophical, ethical or political position regarding 55*4882a593Smuzhiyunthem. 56*4882a593Smuzhiyun 57*4882a593SmuzhiyunThe "Invariant Sections" are certain Secondary Sections whose titles 58*4882a593Smuzhiyunare designated, as being those of Invariant Sections, in the notice 59*4882a593Smuzhiyunthat says that the Document is released under this License. 60*4882a593Smuzhiyun 61*4882a593SmuzhiyunThe "Cover Texts" are certain short passages of text that are listed, 62*4882a593Smuzhiyunas Front-Cover Texts or Back-Cover Texts, in the notice that says that 63*4882a593Smuzhiyunthe Document is released under this License. 64*4882a593Smuzhiyun 65*4882a593SmuzhiyunA "Transparent" copy of the Document means a machine-readable copy, 66*4882a593Smuzhiyunrepresented in a format whose specification is available to the 67*4882a593Smuzhiyungeneral public, whose contents can be viewed and edited directly and 68*4882a593Smuzhiyunstraightforwardly with generic text editors or (for images composed of 69*4882a593Smuzhiyunpixels) generic paint programs or (for drawings) some widely available 70*4882a593Smuzhiyundrawing editor, and that is suitable for input to text formatters or 71*4882a593Smuzhiyunfor automatic translation to a variety of formats suitable for input 72*4882a593Smuzhiyunto text formatters. A copy made in an otherwise Transparent file 73*4882a593Smuzhiyunformat whose markup has been designed to thwart or discourage 74*4882a593Smuzhiyunsubsequent modification by readers is not Transparent. A copy that is 75*4882a593Smuzhiyunnot "Transparent" is called "Opaque". 76*4882a593Smuzhiyun 77*4882a593SmuzhiyunExamples of suitable formats for Transparent copies include plain 78*4882a593SmuzhiyunASCII without markup, Texinfo input format, LaTeX input format, SGML 79*4882a593Smuzhiyunor XML using a publicly available DTD, and standard-conforming simple 80*4882a593SmuzhiyunHTML designed for human modification. Opaque formats include 81*4882a593SmuzhiyunPostScript, PDF, proprietary formats that can be read and edited only 82*4882a593Smuzhiyunby proprietary word processors, SGML or XML for which the DTD and/or 83*4882a593Smuzhiyunprocessing tools are not generally available, and the 84*4882a593Smuzhiyunmachine-generated HTML produced by some word processors for output 85*4882a593Smuzhiyunpurposes only. 86*4882a593Smuzhiyun 87*4882a593SmuzhiyunThe "Title Page" means, for a printed book, the title page itself, 88*4882a593Smuzhiyunplus such following pages as are needed to hold, legibly, the material 89*4882a593Smuzhiyunthis License requires to appear in the title page. For works in 90*4882a593Smuzhiyunformats which do not have any title page as such, "Title Page" means 91*4882a593Smuzhiyunthe text near the most prominent appearance of the work's title, 92*4882a593Smuzhiyunpreceding the beginning of the body of the text. 93*4882a593Smuzhiyun 94*4882a593Smuzhiyun 95*4882a593Smuzhiyun2. VERBATIM COPYING 96*4882a593Smuzhiyun 97*4882a593SmuzhiyunYou may copy and distribute the Document in any medium, either 98*4882a593Smuzhiyuncommercially or noncommercially, provided that this License, the 99*4882a593Smuzhiyuncopyright notices, and the license notice saying this License applies 100*4882a593Smuzhiyunto the Document are reproduced in all copies, and that you add no other 101*4882a593Smuzhiyunconditions whatsoever to those of this License. You may not use 102*4882a593Smuzhiyuntechnical measures to obstruct or control the reading or further 103*4882a593Smuzhiyuncopying of the copies you make or distribute. However, you may accept 104*4882a593Smuzhiyuncompensation in exchange for copies. If you distribute a large enough 105*4882a593Smuzhiyunnumber of copies you must also follow the conditions in section 3. 106*4882a593Smuzhiyun 107*4882a593SmuzhiyunYou may also lend copies, under the same conditions stated above, and 108*4882a593Smuzhiyunyou may publicly display copies. 109*4882a593Smuzhiyun 110*4882a593Smuzhiyun 111*4882a593Smuzhiyun3. COPYING IN QUANTITY 112*4882a593Smuzhiyun 113*4882a593SmuzhiyunIf you publish printed copies of the Document numbering more than 100, 114*4882a593Smuzhiyunand the Document's license notice requires Cover Texts, you must enclose 115*4882a593Smuzhiyunthe copies in covers that carry, clearly and legibly, all these Cover 116*4882a593SmuzhiyunTexts: Front-Cover Texts on the front cover, and Back-Cover Texts on 117*4882a593Smuzhiyunthe back cover. Both covers must also clearly and legibly identify 118*4882a593Smuzhiyunyou as the publisher of these copies. The front cover must present 119*4882a593Smuzhiyunthe full title with all words of the title equally prominent and 120*4882a593Smuzhiyunvisible. You may add other material on the covers in addition. 121*4882a593SmuzhiyunCopying with changes limited to the covers, as long as they preserve 122*4882a593Smuzhiyunthe title of the Document and satisfy these conditions, can be treated 123*4882a593Smuzhiyunas verbatim copying in other respects. 124*4882a593Smuzhiyun 125*4882a593SmuzhiyunIf the required texts for either cover are too voluminous to fit 126*4882a593Smuzhiyunlegibly, you should put the first ones listed (as many as fit 127*4882a593Smuzhiyunreasonably) on the actual cover, and continue the rest onto adjacent 128*4882a593Smuzhiyunpages. 129*4882a593Smuzhiyun 130*4882a593SmuzhiyunIf you publish or distribute Opaque copies of the Document numbering 131*4882a593Smuzhiyunmore than 100, you must either include a machine-readable Transparent 132*4882a593Smuzhiyuncopy along with each Opaque copy, or state in or with each Opaque copy 133*4882a593Smuzhiyuna publicly-accessible computer-network location containing a complete 134*4882a593SmuzhiyunTransparent copy of the Document, free of added material, which the 135*4882a593Smuzhiyungeneral network-using public has access to download anonymously at no 136*4882a593Smuzhiyuncharge using public-standard network protocols. If you use the latter 137*4882a593Smuzhiyunoption, you must take reasonably prudent steps, when you begin 138*4882a593Smuzhiyundistribution of Opaque copies in quantity, to ensure that this 139*4882a593SmuzhiyunTransparent copy will remain thus accessible at the stated location 140*4882a593Smuzhiyununtil at least one year after the last time you distribute an Opaque 141*4882a593Smuzhiyuncopy (directly or through your agents or retailers) of that edition to 142*4882a593Smuzhiyunthe public. 143*4882a593Smuzhiyun 144*4882a593SmuzhiyunIt is requested, but not required, that you contact the authors of the 145*4882a593SmuzhiyunDocument well before redistributing any large number of copies, to give 146*4882a593Smuzhiyunthem a chance to provide you with an updated version of the Document. 147*4882a593Smuzhiyun 148*4882a593Smuzhiyun 149*4882a593Smuzhiyun4. MODIFICATIONS 150*4882a593Smuzhiyun 151*4882a593SmuzhiyunYou may copy and distribute a Modified Version of the Document under 152*4882a593Smuzhiyunthe conditions of sections 2 and 3 above, provided that you release 153*4882a593Smuzhiyunthe Modified Version under precisely this License, with the Modified 154*4882a593SmuzhiyunVersion filling the role of the Document, thus licensing distribution 155*4882a593Smuzhiyunand modification of the Modified Version to whoever possesses a copy 156*4882a593Smuzhiyunof it. In addition, you must do these things in the Modified Version: 157*4882a593Smuzhiyun 158*4882a593SmuzhiyunA. Use in the Title Page (and on the covers, if any) a title distinct 159*4882a593Smuzhiyun from that of the Document, and from those of previous versions 160*4882a593Smuzhiyun (which should, if there were any, be listed in the History section 161*4882a593Smuzhiyun of the Document). You may use the same title as a previous version 162*4882a593Smuzhiyun if the original publisher of that version gives permission. 163*4882a593SmuzhiyunB. List on the Title Page, as authors, one or more persons or entities 164*4882a593Smuzhiyun responsible for authorship of the modifications in the Modified 165*4882a593Smuzhiyun Version, together with at least five of the principal authors of the 166*4882a593Smuzhiyun Document (all of its principal authors, if it has less than five). 167*4882a593SmuzhiyunC. State on the Title page the name of the publisher of the 168*4882a593Smuzhiyun Modified Version, as the publisher. 169*4882a593SmuzhiyunD. Preserve all the copyright notices of the Document. 170*4882a593SmuzhiyunE. Add an appropriate copyright notice for your modifications 171*4882a593Smuzhiyun adjacent to the other copyright notices. 172*4882a593SmuzhiyunF. Include, immediately after the copyright notices, a license notice 173*4882a593Smuzhiyun giving the public permission to use the Modified Version under the 174*4882a593Smuzhiyun terms of this License, in the form shown in the Addendum below. 175*4882a593SmuzhiyunG. Preserve in that license notice the full lists of Invariant Sections 176*4882a593Smuzhiyun and required Cover Texts given in the Document's license notice. 177*4882a593SmuzhiyunH. Include an unaltered copy of this License. 178*4882a593SmuzhiyunI. Preserve the section entitled "History", and its title, and add to 179*4882a593Smuzhiyun it an item stating at least the title, year, new authors, and 180*4882a593Smuzhiyun publisher of the Modified Version as given on the Title Page. If 181*4882a593Smuzhiyun there is no section entitled "History" in the Document, create one 182*4882a593Smuzhiyun stating the title, year, authors, and publisher of the Document as 183*4882a593Smuzhiyun given on its Title Page, then add an item describing the Modified 184*4882a593Smuzhiyun Version as stated in the previous sentence. 185*4882a593SmuzhiyunJ. Preserve the network location, if any, given in the Document for 186*4882a593Smuzhiyun public access to a Transparent copy of the Document, and likewise 187*4882a593Smuzhiyun the network locations given in the Document for previous versions 188*4882a593Smuzhiyun it was based on. These may be placed in the "History" section. 189*4882a593Smuzhiyun You may omit a network location for a work that was published at 190*4882a593Smuzhiyun least four years before the Document itself, or if the original 191*4882a593Smuzhiyun publisher of the version it refers to gives permission. 192*4882a593SmuzhiyunK. In any section entitled "Acknowledgements" or "Dedications", 193*4882a593Smuzhiyun preserve the section's title, and preserve in the section all the 194*4882a593Smuzhiyun substance and tone of each of the contributor acknowledgements 195*4882a593Smuzhiyun and/or dedications given therein. 196*4882a593SmuzhiyunL. Preserve all the Invariant Sections of the Document, 197*4882a593Smuzhiyun unaltered in their text and in their titles. Section numbers 198*4882a593Smuzhiyun or the equivalent are not considered part of the section titles. 199*4882a593SmuzhiyunM. Delete any section entitled "Endorsements". Such a section 200*4882a593Smuzhiyun may not be included in the Modified Version. 201*4882a593SmuzhiyunN. Do not retitle any existing section as "Endorsements" 202*4882a593Smuzhiyun or to conflict in title with any Invariant Section. 203*4882a593Smuzhiyun 204*4882a593SmuzhiyunIf the Modified Version includes new front-matter sections or 205*4882a593Smuzhiyunappendices that qualify as Secondary Sections and contain no material 206*4882a593Smuzhiyuncopied from the Document, you may at your option designate some or all 207*4882a593Smuzhiyunof these sections as invariant. To do this, add their titles to the 208*4882a593Smuzhiyunlist of Invariant Sections in the Modified Version's license notice. 209*4882a593SmuzhiyunThese titles must be distinct from any other section titles. 210*4882a593Smuzhiyun 211*4882a593SmuzhiyunYou may add a section entitled "Endorsements", provided it contains 212*4882a593Smuzhiyunnothing but endorsements of your Modified Version by various 213*4882a593Smuzhiyunparties--for example, statements of peer review or that the text has 214*4882a593Smuzhiyunbeen approved by an organization as the authoritative definition of a 215*4882a593Smuzhiyunstandard. 216*4882a593Smuzhiyun 217*4882a593SmuzhiyunYou may add a passage of up to five words as a Front-Cover Text, and a 218*4882a593Smuzhiyunpassage of up to 25 words as a Back-Cover Text, to the end of the list 219*4882a593Smuzhiyunof Cover Texts in the Modified Version. Only one passage of 220*4882a593SmuzhiyunFront-Cover Text and one of Back-Cover Text may be added by (or 221*4882a593Smuzhiyunthrough arrangements made by) any one entity. If the Document already 222*4882a593Smuzhiyunincludes a cover text for the same cover, previously added by you or 223*4882a593Smuzhiyunby arrangement made by the same entity you are acting on behalf of, 224*4882a593Smuzhiyunyou may not add another; but you may replace the old one, on explicit 225*4882a593Smuzhiyunpermission from the previous publisher that added the old one. 226*4882a593Smuzhiyun 227*4882a593SmuzhiyunThe author(s) and publisher(s) of the Document do not by this License 228*4882a593Smuzhiyungive permission to use their names for publicity for or to assert or 229*4882a593Smuzhiyunimply endorsement of any Modified Version. 230*4882a593Smuzhiyun 231*4882a593Smuzhiyun 232*4882a593Smuzhiyun5. COMBINING DOCUMENTS 233*4882a593Smuzhiyun 234*4882a593SmuzhiyunYou may combine the Document with other documents released under this 235*4882a593SmuzhiyunLicense, under the terms defined in section 4 above for modified 236*4882a593Smuzhiyunversions, provided that you include in the combination all of the 237*4882a593SmuzhiyunInvariant Sections of all of the original documents, unmodified, and 238*4882a593Smuzhiyunlist them all as Invariant Sections of your combined work in its 239*4882a593Smuzhiyunlicense notice. 240*4882a593Smuzhiyun 241*4882a593SmuzhiyunThe combined work need only contain one copy of this License, and 242*4882a593Smuzhiyunmultiple identical Invariant Sections may be replaced with a single 243*4882a593Smuzhiyuncopy. If there are multiple Invariant Sections with the same name but 244*4882a593Smuzhiyundifferent contents, make the title of each such section unique by 245*4882a593Smuzhiyunadding at the end of it, in parentheses, the name of the original 246*4882a593Smuzhiyunauthor or publisher of that section if known, or else a unique number. 247*4882a593SmuzhiyunMake the same adjustment to the section titles in the list of 248*4882a593SmuzhiyunInvariant Sections in the license notice of the combined work. 249*4882a593Smuzhiyun 250*4882a593SmuzhiyunIn the combination, you must combine any sections entitled "History" 251*4882a593Smuzhiyunin the various original documents, forming one section entitled 252*4882a593Smuzhiyun"History"; likewise combine any sections entitled "Acknowledgements", 253*4882a593Smuzhiyunand any sections entitled "Dedications". You must delete all sections 254*4882a593Smuzhiyunentitled "Endorsements." 255*4882a593Smuzhiyun 256*4882a593Smuzhiyun 257*4882a593Smuzhiyun6. COLLECTIONS OF DOCUMENTS 258*4882a593Smuzhiyun 259*4882a593SmuzhiyunYou may make a collection consisting of the Document and other documents 260*4882a593Smuzhiyunreleased under this License, and replace the individual copies of this 261*4882a593SmuzhiyunLicense in the various documents with a single copy that is included in 262*4882a593Smuzhiyunthe collection, provided that you follow the rules of this License for 263*4882a593Smuzhiyunverbatim copying of each of the documents in all other respects. 264*4882a593Smuzhiyun 265*4882a593SmuzhiyunYou may extract a single document from such a collection, and distribute 266*4882a593Smuzhiyunit individually under this License, provided you insert a copy of this 267*4882a593SmuzhiyunLicense into the extracted document, and follow this License in all 268*4882a593Smuzhiyunother respects regarding verbatim copying of that document. 269*4882a593Smuzhiyun 270*4882a593Smuzhiyun 271*4882a593Smuzhiyun7. AGGREGATION WITH INDEPENDENT WORKS 272*4882a593Smuzhiyun 273*4882a593SmuzhiyunA compilation of the Document or its derivatives with other separate 274*4882a593Smuzhiyunand independent documents or works, in or on a volume of a storage or 275*4882a593Smuzhiyundistribution medium, does not as a whole count as a Modified Version 276*4882a593Smuzhiyunof the Document, provided no compilation copyright is claimed for the 277*4882a593Smuzhiyuncompilation. Such a compilation is called an "aggregate", and this 278*4882a593SmuzhiyunLicense does not apply to the other self-contained works thus compiled 279*4882a593Smuzhiyunwith the Document, on account of their being thus compiled, if they 280*4882a593Smuzhiyunare not themselves derivative works of the Document. 281*4882a593Smuzhiyun 282*4882a593SmuzhiyunIf the Cover Text requirement of section 3 is applicable to these 283*4882a593Smuzhiyuncopies of the Document, then if the Document is less than one quarter 284*4882a593Smuzhiyunof the entire aggregate, the Document's Cover Texts may be placed on 285*4882a593Smuzhiyuncovers that surround only the Document within the aggregate. 286*4882a593SmuzhiyunOtherwise they must appear on covers around the whole aggregate. 287*4882a593Smuzhiyun 288*4882a593Smuzhiyun 289*4882a593Smuzhiyun8. TRANSLATION 290*4882a593Smuzhiyun 291*4882a593SmuzhiyunTranslation is considered a kind of modification, so you may 292*4882a593Smuzhiyundistribute translations of the Document under the terms of section 4. 293*4882a593SmuzhiyunReplacing Invariant Sections with translations requires special 294*4882a593Smuzhiyunpermission from their copyright holders, but you may include 295*4882a593Smuzhiyuntranslations of some or all Invariant Sections in addition to the 296*4882a593Smuzhiyunoriginal versions of these Invariant Sections. You may include a 297*4882a593Smuzhiyuntranslation of this License provided that you also include the 298*4882a593Smuzhiyunoriginal English version of this License. In case of a disagreement 299*4882a593Smuzhiyunbetween the translation and the original English version of this 300*4882a593SmuzhiyunLicense, the original English version will prevail. 301*4882a593Smuzhiyun 302*4882a593Smuzhiyun 303*4882a593Smuzhiyun9. TERMINATION 304*4882a593Smuzhiyun 305*4882a593SmuzhiyunYou may not copy, modify, sublicense, or distribute the Document except 306*4882a593Smuzhiyunas expressly provided for under this License. Any other attempt to 307*4882a593Smuzhiyuncopy, modify, sublicense or distribute the Document is void, and will 308*4882a593Smuzhiyunautomatically terminate your rights under this License. However, 309*4882a593Smuzhiyunparties who have received copies, or rights, from you under this 310*4882a593SmuzhiyunLicense will not have their licenses terminated so long as such 311*4882a593Smuzhiyunparties remain in full compliance. 312*4882a593Smuzhiyun 313*4882a593Smuzhiyun 314*4882a593Smuzhiyun10. FUTURE REVISIONS OF THIS LICENSE 315*4882a593Smuzhiyun 316*4882a593SmuzhiyunThe Free Software Foundation may publish new, revised versions 317*4882a593Smuzhiyunof the GNU Free Documentation License from time to time. Such new 318*4882a593Smuzhiyunversions will be similar in spirit to the present version, but may 319*4882a593Smuzhiyundiffer in detail to address new problems or concerns. See 320*4882a593Smuzhiyunhttp://www.gnu.org/copyleft/. 321*4882a593Smuzhiyun 322*4882a593SmuzhiyunEach version of the License is given a distinguishing version number. 323*4882a593SmuzhiyunIf the Document specifies that a particular numbered version of this 324*4882a593SmuzhiyunLicense "or any later version" applies to it, you have the option of 325*4882a593Smuzhiyunfollowing the terms and conditions either of that specified version or 326*4882a593Smuzhiyunof any later version that has been published (not as a draft) by the 327*4882a593SmuzhiyunFree Software Foundation. If the Document does not specify a version 328*4882a593Smuzhiyunnumber of this License, you may choose any version ever published (not 329*4882a593Smuzhiyunas a draft) by the Free Software Foundation. 330*4882a593Smuzhiyun 331*4882a593Smuzhiyun 332*4882a593SmuzhiyunADDENDUM: How to use this License for your documents 333*4882a593Smuzhiyun 334*4882a593SmuzhiyunTo use this License in a document you have written, include a copy of 335*4882a593Smuzhiyunthe License in the document and put the following copyright and 336*4882a593Smuzhiyunlicense notices just after the title page: 337*4882a593Smuzhiyun 338*4882a593Smuzhiyun Copyright (c) YEAR YOUR NAME. 339*4882a593Smuzhiyun Permission is granted to copy, distribute and/or modify this document 340*4882a593Smuzhiyun under the terms of the GNU Free Documentation License, Version 1.1 341*4882a593Smuzhiyun or any later version published by the Free Software Foundation; 342*4882a593Smuzhiyun with the Invariant Sections being LIST THEIR TITLES, with the 343*4882a593Smuzhiyun Front-Cover Texts being LIST, and with the Back-Cover Texts being LIST. 344*4882a593Smuzhiyun A copy of the license is included in the section entitled "GNU 345*4882a593Smuzhiyun Free Documentation License". 346*4882a593Smuzhiyun 347*4882a593SmuzhiyunIf you have no Invariant Sections, write "with no Invariant Sections" 348*4882a593Smuzhiyuninstead of saying which ones are invariant. If you have no 349*4882a593SmuzhiyunFront-Cover Texts, write "no Front-Cover Texts" instead of 350*4882a593Smuzhiyun"Front-Cover Texts being LIST"; likewise for Back-Cover Texts. 351*4882a593Smuzhiyun 352*4882a593SmuzhiyunIf your document contains nontrivial examples of program code, we 353*4882a593Smuzhiyunrecommend releasing these examples in parallel under your choice of 354*4882a593Smuzhiyunfree software license, such as the GNU General Public License, 355*4882a593Smuzhiyunto permit their use in free software. 356