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370 lines
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GNU Free Documentation License |
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Version 1.2, November 2002 |
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Copyright (C) 2000,2001,2002 Free Software Foundation, Inc. 51 Franklin St, |
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Fifth Floor, Boston, MA 02110-1301 USA |
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Everyone is permitted to copy and distribute verbatim copies of this license |
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document, but changing it is not allowed. |
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0. PREAMBLE |
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The purpose of this License is to make a manual, textbook, or other functional |
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and useful document "free" in the sense of freedom: to assure everyone the |
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effective freedom to copy and redistribute it, with or without modifying it, |
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either commercially or noncommercially. Secondarily, this License preserves |
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for the author and publisher a way to get credit for their work, while not |
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being considered responsible for modifications made by others. |
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This License is a kind of "copyleft", which means that derivative works of |
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the document must themselves be free in the same sense. It complements the |
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GNU General Public License, which is a copyleft license designed for free |
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software. |
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We have designed this License in order to use it for manuals for free software, |
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because free software needs free documentation: a free program should come |
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with manuals providing the same freedoms that the software does. But this |
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License is not limited to software manuals; it can be used for any textual |
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work, regardless of subject matter or whether it is published as a printed |
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book. We recommend this License principally for works whose purpose is instruction |
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or reference. |
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1. APPLICABILITY AND DEFINITIONS |
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This License applies to any manual or other work, in any medium, that contains |
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a notice placed by the copyright holder saying it can be distributed under |
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the terms of this License. Such a notice grants a world-wide, royalty-free |
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license, unlimited in duration, to use that work under the conditions stated |
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herein. The "Document", below, refers to any such manual or work. Any member |
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of the public is a licensee, and is addressed as "you". You accept the license |
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if you copy, modify or distribute the work in a way requiring permission under |
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copyright law. |
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A "Modified Version" of the Document means any work containing the Document |
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or a portion of it, either copied verbatim, or with modifications and/or translated |
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into another language. |
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A "Secondary Section" is a named appendix or a front-matter section of the |
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Document that deals exclusively with the relationship of the publishers or |
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authors of the Document to the Document's overall subject (or to related matters) |
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and contains nothing that could fall directly within that overall subject. |
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(Thus, if the Document is in part a textbook of mathematics, a Secondary Section |
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may not explain any mathematics.) The relationship could be a matter of historical |
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connection with the subject or with related matters, or of legal, commercial, |
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philosophical, ethical or political position regarding them. |
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The "Invariant Sections" are certain Secondary Sections whose titles are designated, |
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as being those of Invariant Sections, in the notice that says that the Document |
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is released under this License. If a section does not fit the above definition |
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of Secondary then it is not allowed to be designated as Invariant. The Document |
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may contain zero Invariant Sections. If the Document does not identify any |
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Invariant Sections then there are none. |
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The "Cover Texts" are certain short passages of text that are listed, as Front-Cover |
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Texts or Back-Cover Texts, in the notice that says that the Document is released |
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under this License. A Front-Cover Text may be at most 5 words, and a Back-Cover |
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Text may be at most 25 words. |
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A "Transparent" copy of the Document means a machine-readable copy, represented |
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in a format whose specification is available to the general public, that is |
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suitable for revising the document straightforwardly with generic text editors |
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or (for images composed of pixels) generic paint programs or (for drawings) |
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some widely available drawing editor, and that is suitable for input to text |
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formatters or for automatic translation to a variety of formats suitable for |
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input to text formatters. A copy made in an otherwise Transparent file format |
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whose markup, or absence of markup, has been arranged to thwart or discourage |
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subsequent modification by readers is not Transparent. An image format is |
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not Transparent if used for any substantial amount of text. A copy that is |
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not "Transparent" is called "Opaque". |
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Examples of suitable formats for Transparent copies include plain ASCII without |
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markup, Texinfo input format, LaTeX input format, SGML or XML using a publicly |
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available DTD, and standard-conforming simple HTML, PostScript or PDF designed |
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for human modification. Examples of transparent image formats include PNG, |
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XCF and JPG. Opaque formats include proprietary formats that can be read and |
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edited only by proprietary word processors, SGML or XML for which the DTD |
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and/or processing tools are not generally available, and the machine-generated |
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HTML, PostScript or PDF produced by some word processors for output purposes |
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only. |
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The "Title Page" means, for a printed book, the title page itself, plus such |
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following pages as are needed to hold, legibly, the material this License |
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requires to appear in the title page. For works in formats which do not have |
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any title page as such, "Title Page" means the text near the most prominent |
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appearance of the work's title, preceding the beginning of the body of the |
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text. |
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A section "Entitled XYZ" means a named subunit of the Document whose title |
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either is precisely XYZ or contains XYZ in parentheses following text that |
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translates XYZ in another language. (Here XYZ stands for a specific section |
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name mentioned below, such as "Acknowledgements", "Dedications", "Endorsements", |
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or "History".) To "Preserve the Title" of such a section when you modify the |
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Document means that it remains a section "Entitled XYZ" according to this |
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definition. |
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The Document may include Warranty Disclaimers next to the notice which states |
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that this License applies to the Document. These Warranty Disclaimers are |
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considered to be included by reference in this License, but only as regards |
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disclaiming warranties: any other implication that these Warranty Disclaimers |
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may have is void and has no effect on the meaning of this License. |
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2. VERBATIM COPYING |
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You may copy and distribute the Document in any medium, either commercially |
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or noncommercially, provided that this License, the copyright notices, and |
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the license notice saying this License applies to the Document are reproduced |
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in all copies, and that you add no other conditions whatsoever to those of |
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this License. You may not use technical measures to obstruct or control the |
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reading or further copying of the copies you make or distribute. However, |
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you may accept compensation in exchange for copies. If you distribute a large |
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enough number of copies you must also follow the conditions in section 3. |
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You may also lend copies, under the same conditions stated above, and you |
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may publicly display copies. |
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3. COPYING IN QUANTITY |
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If you publish printed copies (or copies in media that commonly have printed |
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covers) of the Document, numbering more than 100, and the Document's license |
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notice requires Cover Texts, you must enclose the copies in covers that carry, |
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clearly and legibly, all these Cover Texts: Front-Cover Texts on the front |
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cover, and Back-Cover Texts on the back cover. Both covers must also clearly |
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and legibly identify you as the publisher of these copies. The front cover |
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must present the full title with all words of the title equally prominent |
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and visible. You may add other material on the covers in addition. Copying |
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with changes limited to the covers, as long as they preserve the title of |
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the Document and satisfy these conditions, can be treated as verbatim copying |
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in other respects. |
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If the required texts for either cover are too voluminous to fit legibly, |
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you should put the first ones listed (as many as fit reasonably) on the actual |
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cover, and continue the rest onto adjacent pages. |
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If you publish or distribute Opaque copies of the Document numbering more |
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than 100, you must either include a machine-readable Transparent copy along |
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with each Opaque copy, or state in or with each Opaque copy a computer-network |
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location from which the general network-using public has access to download |
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using public-standard network protocols a complete Transparent copy of the |
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Document, free of added material. If you use the latter option, you must take |
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reasonably prudent steps, when you begin distribution of Opaque copies in |
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quantity, to ensure that this Transparent copy will remain thus accessible |
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at the stated location until at least one year after the last time you distribute |
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an Opaque copy (directly or through your agents or retailers) of that edition |
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to the public. |
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It is requested, but not required, that you contact the authors of the Document |
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well before redistributing any large number of copies, to give them a chance |
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to provide you with an updated version of the Document. |
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4. MODIFICATIONS |
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You may copy and distribute a Modified Version of the Document under the conditions |
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of sections 2 and 3 above, provided that you release the Modified Version |
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under precisely this License, with the Modified Version filling the role of |
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the Document, thus licensing distribution and modification of the Modified |
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Version to whoever possesses a copy of it. In addition, you must do these |
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things in the Modified Version: |
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A. Use in the Title Page (and on the covers, if any) a title distinct from |
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that of the Document, and from those of previous versions (which should, if |
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there were any, be listed in the History section of the Document). You may |
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use the same title as a previous version if the original publisher of that |
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version gives permission. |
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B. List on the Title Page, as authors, one or more persons or entities responsible |
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for authorship of the modifications in the Modified Version, together with |
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at least five of the principal authors of the Document (all of its principal |
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authors, if it has fewer than five), unless they release you from this requirement. |
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C. State on the Title page the name of the publisher of the Modified Version, |
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as the publisher. |
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D. Preserve all the copyright notices of the Document. |
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E. Add an appropriate copyright notice for your modifications adjacent to |
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the other copyright notices. |
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F. Include, immediately after the copyright notices, a license notice giving |
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the public permission to use the Modified Version under the terms of this |
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License, in the form shown in the Addendum below. |
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G. Preserve in that license notice the full lists of Invariant Sections and |
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required Cover Texts given in the Document's license notice. |
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H. Include an unaltered copy of this License. |
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I. Preserve the section Entitled "History", Preserve its Title, and add to |
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it an item stating at least the title, year, new authors, and publisher of |
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the Modified Version as given on the Title Page. If there is no section Entitled |
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"History" in the Document, create one stating the title, year, authors, and |
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publisher of the Document as given on its Title Page, then add an item describing |
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the Modified Version as stated in the previous sentence. |
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J. Preserve the network location, if any, given in the Document for public |
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access to a Transparent copy of the Document, and likewise the network locations |
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given in the Document for previous versions it was based on. These may be |
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placed in the "History" section. You may omit a network location for a work |
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that was published at least four years before the Document itself, or if the |
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original publisher of the version it refers to gives permission. |
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K. For any section Entitled "Acknowledgements" or "Dedications", Preserve |
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the Title of the section, and preserve in the section all the substance and |
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tone of each of the contributor acknowledgements and/or dedications given |
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therein. |
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L. Preserve all the Invariant Sections of the Document, unaltered in their |
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text and in their titles. Section numbers or the equivalent are not considered |
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part of the section titles. |
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M. Delete any section Entitled "Endorsements". Such a section may not be included |
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in the Modified Version. |
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N. Do not retitle any existing section to be Entitled "Endorsements" or to |
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conflict in title with any Invariant Section. |
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O. Preserve any Warranty Disclaimers. |
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If the Modified Version includes new front-matter sections or appendices that |
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qualify as Secondary Sections and contain no material copied from the Document, |
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you may at your option designate some or all of these sections as invariant. |
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To do this, add their titles to the list of Invariant Sections in the Modified |
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Version's license notice. These titles must be distinct from any other section |
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titles. |
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You may add a section Entitled "Endorsements", provided it contains nothing |
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but endorsements of your Modified Version by various parties--for example, |
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statements of peer review or that the text has been approved by an organization |
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as the authoritative definition of a standard. |
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You may add a passage of up to five words as a Front-Cover Text, and a passage |
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of up to 25 words as a Back-Cover Text, to the end of the list of Cover Texts |
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in the Modified Version. Only one passage of Front-Cover Text and one of Back-Cover |
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Text may be added by (or through arrangements made by) any one entity. If |
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the Document already includes a cover text for the same cover, previously |
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added by you or by arrangement made by the same entity you are acting on behalf |
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of, you may not add another; but you may replace the old one, on explicit |
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permission from the previous publisher that added the old one. |
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The author(s) and publisher(s) of the Document do not by this License give |
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permission to use their names for publicity for or to assert or imply endorsement |
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of any Modified Version. |
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5. COMBINING DOCUMENTS |
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You may combine the Document with other documents released under this License, |
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under the terms defined in section 4 above for modified versions, provided |
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that you include in the combination all of the Invariant Sections of all of |
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the original documents, unmodified, and list them all as Invariant Sections |
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of your combined work in its license notice, and that you preserve all their |
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Warranty Disclaimers. |
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The combined work need only contain one copy of this License, and multiple |
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identical Invariant Sections may be replaced with a single copy. If there |
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are multiple Invariant Sections with the same name but different contents, |
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make the title of each such section unique by adding at the end of it, in |
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parentheses, the name of the original author or publisher of that section |
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if known, or else a unique number. Make the same adjustment to the section |
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titles in the list of Invariant Sections in the license notice of the combined |
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work. |
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In the combination, you must combine any sections Entitled "History" in the |
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various original documents, forming one section Entitled "History"; likewise |
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combine any sections Entitled "Acknowledgements", and any sections Entitled |
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"Dedications". You must delete all sections Entitled "Endorsements". |
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6. COLLECTIONS OF DOCUMENTS |
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You may make a collection consisting of the Document and other documents released |
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under this License, and replace the individual copies of this License in the |
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various documents with a single copy that is included in the collection, provided |
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that you follow the rules of this License for verbatim copying of each of |
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the documents in all other respects. |
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You may extract a single document from such a collection, and distribute it |
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individually under this License, provided you insert a copy of this License |
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into the extracted document, and follow this License in all other respects |
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regarding verbatim copying of that document. |
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7. AGGREGATION WITH INDEPENDENT WORKS |
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A compilation of the Document or its derivatives with other separate and independent |
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documents or works, in or on a volume of a storage or distribution medium, |
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is called an "aggregate" if the copyright resulting from the compilation is |
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not used to limit the legal rights of the compilation's users beyond what |
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the individual works permit. When the Document is included in an aggregate, |
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this License does not apply to the other works in the aggregate which are |
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not themselves derivative works of the Document. |
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If the Cover Text requirement of section 3 is applicable to these copies of |
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the Document, then if the Document is less than one half of the entire aggregate, |
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the Document's Cover Texts may be placed on covers that bracket the Document |
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within the aggregate, or the electronic equivalent of covers if the Document |
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is in electronic form. Otherwise they must appear on printed covers that bracket |
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the whole aggregate. |
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8. TRANSLATION |
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Translation is considered a kind of modification, so you may distribute translations |
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of the Document under the terms of section 4. Replacing Invariant Sections |
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with translations requires special permission from their copyright holders, |
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but you may include translations of some or all Invariant Sections in addition |
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to the original versions of these Invariant Sections. You may include a translation |
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of this License, and all the license notices in the Document, and any Warranty |
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Disclaimers, provided that you also include the original English version of |
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this License and the original versions of those notices and disclaimers. In |
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case of a disagreement between the translation and the original version of |
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this License or a notice or disclaimer, the original version will prevail. |
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If a section in the Document is Entitled "Acknowledgements", "Dedications", |
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or "History", the requirement (section 4) to Preserve its Title (section 1) |
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will typically require changing the actual title. |
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9. TERMINATION |
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You may not copy, modify, sublicense, or distribute the Document except as |
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expressly provided for under this License. Any other attempt to copy, modify, |
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sublicense or distribute the Document is void, and will automatically terminate |
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your rights under this License. However, parties who have received copies, |
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or rights, from you under this License will not have their licenses terminated |
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so long as such parties remain in full compliance. |
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10. FUTURE REVISIONS OF THIS LICENSE |
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The Free Software Foundation may publish new, revised versions of the GNU |
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Free Documentation License from time to time. Such new versions will be similar |
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in spirit to the present version, but may differ in detail to address new |
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problems or concerns. See http://www.gnu.org/copyleft/. |
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Each version of the License is given a distinguishing version number. If the |
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Document specifies that a particular numbered version of this License "or |
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any later version" applies to it, you have the option of following the terms |
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and conditions either of that specified version or of any later version that |
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has been published (not as a draft) by the Free Software Foundation. If the |
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Document does not specify a version number of this License, you may choose |
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any version ever published (not as a draft) by the Free Software Foundation. |
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ADDENDUM: How to use this License for your documents |
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To use this License in a document you have written, include a copy of the |
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License in the document and put the following copyright and license notices |
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just after the title page: |
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Copyright (c) YEAR YOUR NAME. Permission is granted to copy, distribute and/or |
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modify this document under the terms of the GNU Free Documentation License, |
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Version 1.2 or any later version published by the Free Software Foundation; |
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with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. |
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A copy of the license is included in the section entitled "GNU Free Documentation |
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License". |
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If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts, replace |
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the "with...Texts." line with this: |
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with the Invariant Sections being LIST THEIR TITLES, with the Front-Cover |
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Texts being LIST, and with the Back-Cover Texts being LIST. |
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If you have Invariant Sections without Cover Texts, or some other combination |
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of the three, merge those two alternatives to suit the situation. |
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If your document contains nontrivial examples of program code, we recommend |
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releasing these examples in parallel under your choice of free software license, |
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such as the GNU General Public License, to permit their use in free software.
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