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0015 <h3>GNU Free Documentation License</h3>
0016 <p>
0017   Version 1.2, November 2002
0018 </p>
0019 
0020 <pre>
0021   Copyright (C) 2000,2001,2002  Free Software Foundation, Inc.
0022   51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
0023   Everyone is permitted to copy and distribute verbatim copies
0024   of this license document, but changing it is not allowed.
0025 </pre>
0026 
0027 <p>
0028   <strong>0. PREAMBLE</strong>
0029 </p>
0030 
0031 <p>
0032   The purpose of this License is to make a manual, textbook, or other
0033   functional and useful document "free" in the sense of freedom: to
0034   assure everyone the effective freedom to copy and redistribute it,
0035   with or without modifying it, either commercially or noncommercially.
0036   Secondarily, this License preserves for the author and publisher a way
0037   to get credit for their work, while not being considered responsible
0038   for modifications made by others.
0039 </p>
0040 
0041 <p>
0042   This License is a kind of "copyleft", which means that derivative
0043   works of the document must themselves be free in the same sense.  It
0044   complements the GNU General Public License, which is a copyleft
0045   license designed for free software.
0046 </p>
0047 
0048 <p>
0049   We have designed this License in order to use it for manuals for free
0050   software, because free software needs free documentation: a free
0051   program should come with manuals providing the same freedoms that the
0052   software does.  But this License is not limited to software manuals;
0053   it can be used for any textual work, regardless of subject matter or
0054   whether it is published as a printed book.  We recommend this License
0055   principally for works whose purpose is instruction or reference.
0056 </p>
0057 
0058 <p>
0059   <strong>1. APPLICABILITY AND DEFINITIONS</strong>
0060 </p>
0061 
0062 <p>
0063   This License applies to any manual or other work, in any medium, that
0064   contains a notice placed by the copyright holder saying it can be
0065   distributed under the terms of this License.  Such a notice grants a
0066   world-wide, royalty-free license, unlimited in duration, to use that
0067   work under the conditions stated herein.  The "Document", below,
0068   refers to any such manual or work.  Any member of the public is a
0069   licensee, and is addressed as "you".  You accept the license if you
0070   copy, modify or distribute the work in a way requiring permission
0071   under copyright law.
0072 </p>
0073 
0074 <p>
0075   A "Modified Version" of the Document means any work containing the
0076   Document or a portion of it, either copied verbatim, or with
0077   modifications and/or translated into another language.
0078 </p>
0079 
0080 <p>
0081   A "Secondary Section" is a named appendix or a front-matter section of
0082   the Document that deals exclusively with the relationship of the
0083   publishers or authors of the Document to the Document's overall subject
0084   (or to related matters) and contains nothing that could fall directly
0085   within that overall subject.  (Thus, if the Document is in part a
0086   textbook of mathematics, a Secondary Section may not explain any
0087   mathematics.)  The relationship could be a matter of historical
0088   connection with the subject or with related matters, or of legal,
0089   commercial, philosophical, ethical or political position regarding
0090   them.
0091 </p>
0092 
0093 <p>
0094   The "Invariant Sections" are certain Secondary Sections whose titles
0095   are designated, as being those of Invariant Sections, in the notice
0096   that says that the Document is released under this License.  If a
0097   section does not fit the above definition of Secondary then it is not
0098   allowed to be designated as Invariant.  The Document may contain zero
0099   Invariant Sections.  If the Document does not identify any Invariant
0100   Sections then there are none.
0101 </p>
0102 
0103 <p>
0104   The "Cover Texts" are certain short passages of text that are listed,
0105   as Front-Cover Texts or Back-Cover Texts, in the notice that says that
0106   the Document is released under this License.  A Front-Cover Text may
0107   be at most 5 words, and a Back-Cover Text may be at most 25 words.
0108 </p>
0109 
0110 <p>
0111   A "Transparent" copy of the Document means a machine-readable copy,
0112   represented in a format whose specification is available to the
0113   general public, that is suitable for revising the document
0114   straightforwardly with generic text editors or (for images composed of
0115   pixels) generic paint programs or (for drawings) some widely available
0116   drawing editor, and that is suitable for input to text formatters or
0117   for automatic translation to a variety of formats suitable for input
0118   to text formatters.  A copy made in an otherwise Transparent file
0119   format whose markup, or absence of markup, has been arranged to thwart
0120   or discourage subsequent modification by readers is not Transparent.
0121   An image format is not Transparent if used for any substantial amount
0122   of text.  A copy that is not "Transparent" is called "Opaque".
0123 </p>
0124 
0125 <p>
0126   Examples of suitable formats for Transparent copies include plain
0127   ASCII without markup, Texinfo input format, LaTeX input format, SGML
0128   or XML using a publicly available DTD, and standard-conforming simple
0129   HTML, PostScript or PDF designed for human modification.  Examples of
0130   transparent image formats include PNG, XCF and JPG.  Opaque formats
0131   include proprietary formats that can be read and edited only by
0132   proprietary word processors, SGML or XML for which the DTD and/or
0133   processing tools are not generally available, and the
0134   machine-generated HTML, PostScript or PDF produced by some word
0135   processors for output purposes only.
0136 </p>
0137 
0138 <p>
0139   The "Title Page" means, for a printed book, the title page itself,
0140   plus such following pages as are needed to hold, legibly, the material
0141   this License requires to appear in the title page.  For works in
0142   formats which do not have any title page as such, "Title Page" means
0143   the text near the most prominent appearance of the work's title,
0144   preceding the beginning of the body of the text.
0145 </p>
0146 
0147 <p>
0148   A section "Entitled XYZ" means a named subunit of the Document whose
0149   title either is precisely XYZ or contains XYZ in parentheses following
0150   text that translates XYZ in another language.  (Here XYZ stands for a
0151   specific section name mentioned below, such as "Acknowledgements",
0152   "Dedications", "Endorsements", or "History".)  To "Preserve the Title"
0153   of such a section when you modify the Document means that it remains a
0154   section "Entitled XYZ" according to this definition.
0155 </p>
0156 
0157 <p>
0158   The Document may include Warranty Disclaimers next to the notice which
0159   states that this License applies to the Document.  These Warranty
0160   Disclaimers are considered to be included by reference in this
0161   License, but only as regards disclaiming warranties: any other
0162   implication that these Warranty Disclaimers may have is void and has
0163   no effect on the meaning of this License.
0164 </p>
0165 
0166 <p>
0167   <strong>2. VERBATIM COPYING</strong>
0168 </p>
0169 
0170 <p>
0171   You may copy and distribute the Document in any medium, either
0172   commercially or noncommercially, provided that this License, the
0173   copyright notices, and the license notice saying this License applies
0174   to the Document are reproduced in all copies, and that you add no other
0175   conditions whatsoever to those of this License.  You may not use
0176   technical measures to obstruct or control the reading or further
0177   copying of the copies you make or distribute.  However, you may accept
0178   compensation in exchange for copies.  If you distribute a large enough
0179   number of copies you must also follow the conditions in section 3.
0180 </p>
0181 
0182 <p>
0183   You may also lend copies, under the same conditions stated above, and
0184   you may publicly display copies.
0185 </p>
0186 
0187 <p>
0188   <strong>3. COPYING IN QUANTITY</strong>
0189 </p>
0190 
0191 <p>
0192   If you publish printed copies (or copies in media that commonly have
0193   printed covers) of the Document, numbering more than 100, and the
0194   Document's license notice requires Cover Texts, you must enclose the
0195   copies in covers that carry, clearly and legibly, all these Cover
0196   Texts: Front-Cover Texts on the front cover, and Back-Cover Texts on
0197   the back cover.  Both covers must also clearly and legibly identify
0198   you as the publisher of these copies.  The front cover must present
0199   the full title with all words of the title equally prominent and
0200   visible.  You may add other material on the covers in addition.
0201   Copying with changes limited to the covers, as long as they preserve
0202   the title of the Document and satisfy these conditions, can be treated
0203   as verbatim copying in other respects.
0204 </p>
0205 
0206 <p>
0207   If the required texts for either cover are too voluminous to fit
0208   legibly, you should put the first ones listed (as many as fit
0209   reasonably) on the actual cover, and continue the rest onto adjacent
0210   pages.
0211 </p>
0212 
0213 <p>
0214   If you publish or distribute Opaque copies of the Document numbering
0215   more than 100, you must either include a machine-readable Transparent
0216   copy along with each Opaque copy, or state in or with each Opaque copy
0217   a computer-network location from which the general network-using
0218   public has access to download using public-standard network protocols
0219   a complete Transparent copy of the Document, free of added material.
0220   If you use the latter option, you must take reasonably prudent steps,
0221   when you begin distribution of Opaque copies in quantity, to ensure
0222   that this Transparent copy will remain thus accessible at the stated
0223   location until at least one year after the last time you distribute an
0224   Opaque copy (directly or through your agents or retailers) of that
0225   edition to the public.
0226 </p>
0227 
0228 <p>
0229   It is requested, but not required, that you contact the authors of the
0230   Document well before redistributing any large number of copies, to give
0231   them a chance to provide you with an updated version of the Document.
0232 </p>
0233 
0234 <p>
0235   <strong>4. MODIFICATIONS</strong>
0236 </p>
0237 
0238 <p>
0239   You may copy and distribute a Modified Version of the Document under
0240   the conditions of sections 2 and 3 above, provided that you release
0241   the Modified Version under precisely this License, with the Modified
0242   Version filling the role of the Document, thus licensing distribution
0243   and modification of the Modified Version to whoever possesses a copy
0244   of it.  In addition, you must do these things in the Modified Version:
0245 </p>
0246 
0247 <ul>
0248   <li><strong>A.</strong> Use in the Title Page (and on the covers, if any) a title distinct
0249   from that of the Document, and from those of previous versions
0250   (which should, if there were any, be listed in the History section
0251   of the Document).  You may use the same title as a previous version
0252   if the original publisher of that version gives permission.</li>
0253   <li><strong>B.</strong> List on the Title Page, as authors, one or more persons or entities
0254   responsible for authorship of the modifications in the Modified
0255   Version, together with at least five of the principal authors of the
0256   Document (all of its principal authors, if it has fewer than five),
0257   unless they release you from this requirement.</li>
0258   <li><strong>C.</strong> State on the Title page the name of the publisher of the
0259   Modified Version, as the publisher.</li>
0260   <li><strong>D.</strong> Preserve all the copyright notices of the Document.</li>
0261   <li><strong>E.</strong> Add an appropriate copyright notice for your modifications
0262   adjacent to the other copyright notices.</li>
0263   <li><strong>F.</strong> Include, immediately after the copyright notices, a license notice
0264   giving the public permission to use the Modified Version under the
0265   terms of this License, in the form shown in the Addendum below.</li>
0266   <li><strong>G.</strong> Preserve in that license notice the full lists of Invariant Sections
0267   and required Cover Texts given in the Document's license notice.</li>
0268   <li><strong>H.</strong> Include an unaltered copy of this License.</li>
0269   <li><strong>I.</strong> Preserve the section Entitled "History", Preserve its Title, and add
0270   to it an item stating at least the title, year, new authors, and
0271   publisher of the Modified Version as given on the Title Page.  If
0272   there is no section Entitled "History" in the Document, create one
0273   stating the title, year, authors, and publisher of the Document as
0274   given on its Title Page, then add an item describing the Modified
0275   Version as stated in the previous sentence.</li>
0276   <li><strong>J.</strong> Preserve the network location, if any, given in the Document for
0277   public access to a Transparent copy of the Document, and likewise
0278   the network locations given in the Document for previous versions
0279   it was based on.  These may be placed in the "History" section.
0280   You may omit a network location for a work that was published at
0281   least four years before the Document itself, or if the original
0282   publisher of the version it refers to gives permission.</li>
0283   <li><strong>K.</strong> For any section Entitled "Acknowledgements" or "Dedications",
0284   Preserve the Title of the section, and preserve in the section all
0285   the substance and tone of each of the contributor acknowledgements
0286   and/or dedications given therein.</li>
0287   <li><strong>L.</strong> Preserve all the Invariant Sections of the Document,
0288   unaltered in their text and in their titles.  Section numbers
0289   or the equivalent are not considered part of the section titles.</li>
0290   <li><strong>M.</strong> Delete any section Entitled "Endorsements".  Such a section
0291   may not be included in the Modified Version.</li>
0292   <li><strong>N.</strong> Do not retitle any existing section to be Entitled "Endorsements"
0293   or to conflict in title with any Invariant Section.</li>
0294   <li><strong>O.</strong> Preserve any Warranty Disclaimers.</li>
0295 </ul>
0296 
0297 <p>
0298   If the Modified Version includes new front-matter sections or
0299   appendices that qualify as Secondary Sections and contain no material
0300   copied from the Document, you may at your option designate some or all
0301   of these sections as invariant.  To do this, add their titles to the
0302   list of Invariant Sections in the Modified Version's license notice.
0303   These titles must be distinct from any other section titles.
0304 </p>
0305 
0306 <p>
0307   You may add a section Entitled "Endorsements", provided it contains
0308   nothing but endorsements of your Modified Version by various
0309   parties--for example, statements of peer review or that the text has
0310   been approved by an organization as the authoritative definition of a
0311   standard.
0312 </p>
0313 
0314 <p>
0315   You may add a passage of up to five words as a Front-Cover Text, and a
0316   passage of up to 25 words as a Back-Cover Text, to the end of the list
0317   of Cover Texts in the Modified Version.  Only one passage of
0318   Front-Cover Text and one of Back-Cover Text may be added by (or
0319   through arrangements made by) any one entity.  If the Document already
0320   includes a cover text for the same cover, previously added by you or
0321   by arrangement made by the same entity you are acting on behalf of,
0322   you may not add another; but you may replace the old one, on explicit
0323   permission from the previous publisher that added the old one.
0324 </p>
0325 
0326 <p>
0327   The author(s) and publisher(s) of the Document do not by this License
0328   give permission to use their names for publicity for or to assert or
0329   imply endorsement of any Modified Version.
0330 </p>
0331 
0332 <p>
0333   <strong>5. COMBINING DOCUMENTS</strong>
0334 </p>
0335 
0336 <p>
0337   You may combine the Document with other documents released under this
0338   License, under the terms defined in section 4 above for modified
0339   versions, provided that you include in the combination all of the
0340   Invariant Sections of all of the original documents, unmodified, and
0341   list them all as Invariant Sections of your combined work in its
0342   license notice, and that you preserve all their Warranty Disclaimers.
0343 </p>
0344 
0345 <p>
0346   The combined work need only contain one copy of this License, and
0347   multiple identical Invariant Sections may be replaced with a single
0348   copy.  If there are multiple Invariant Sections with the same name but
0349   different contents, make the title of each such section unique by
0350   adding at the end of it, in parentheses, the name of the original
0351   author or publisher of that section if known, or else a unique number.
0352   Make the same adjustment to the section titles in the list of
0353   Invariant Sections in the license notice of the combined work.
0354 </p>
0355 
0356 <p>
0357   In the combination, you must combine any sections Entitled "History"
0358   in the various original documents, forming one section Entitled
0359   "History"; likewise combine any sections Entitled "Acknowledgements",
0360   and any sections Entitled "Dedications".  You must delete all sections
0361   Entitled "Endorsements."
0362 </p>
0363 
0364 <p>
0365   <strong>6. COLLECTIONS OF DOCUMENTS</strong>
0366 </p>
0367 
0368 <p>
0369   You may make a collection consisting of the Document and other documents
0370   released under this License, and replace the individual copies of this
0371   License in the various documents with a single copy that is included in
0372   the collection, provided that you follow the rules of this License for
0373   verbatim copying of each of the documents in all other respects.
0374 </p>
0375 
0376 <p>
0377   You may extract a single document from such a collection, and distribute
0378   it individually under this License, provided you insert a copy of this
0379   License into the extracted document, and follow this License in all
0380   other respects regarding verbatim copying of that document.
0381 </p>
0382 
0383 <p>
0384   <strong>7. AGGREGATION WITH INDEPENDENT WORKS</strong>
0385 </p>
0386 
0387 <p>
0388   A compilation of the Document or its derivatives with other separate
0389   and independent documents or works, in or on a volume of a storage or
0390   distribution medium, is called an "aggregate" if the copyright
0391   resulting from the compilation is not used to limit the legal rights
0392   of the compilation's users beyond what the individual works permit.
0393   When the Document is included in an aggregate, this License does not
0394   apply to the other works in the aggregate which are not themselves
0395   derivative works of the Document.
0396 </p>
0397 
0398 <p>
0399   If the Cover Text requirement of section 3 is applicable to these
0400   copies of the Document, then if the Document is less than one half of
0401   the entire aggregate, the Document's Cover Texts may be placed on
0402   covers that bracket the Document within the aggregate, or the
0403   electronic equivalent of covers if the Document is in electronic form.
0404   Otherwise they must appear on printed covers that bracket the whole
0405   aggregate.
0406 </p>
0407 
0408 <p>
0409   <strong>8. TRANSLATION</strong>
0410 </p>
0411 
0412 <p>
0413   Translation is considered a kind of modification, so you may
0414   distribute translations of the Document under the terms of section 4.
0415   Replacing Invariant Sections with translations requires special
0416   permission from their copyright holders, but you may include
0417   translations of some or all Invariant Sections in addition to the
0418   original versions of these Invariant Sections.  You may include a
0419   translation of this License, and all the license notices in the
0420   Document, and any Warranty Disclaimers, provided that you also include
0421   the original English version of this License and the original versions
0422   of those notices and disclaimers.  In case of a disagreement between
0423   the translation and the original version of this License or a notice
0424   or disclaimer, the original version will prevail.
0425 </p>
0426 
0427 <p>
0428   If a section in the Document is Entitled "Acknowledgements",
0429   "Dedications", or "History", the requirement (section 4) to Preserve
0430   its Title (section 1) will typically require changing the actual
0431   title.
0432 </p>
0433 
0434 <p>
0435   <strong>9. TERMINATION</strong>
0436 </p>
0437 
0438 <p>
0439   You may not copy, modify, sublicense, or distribute the Document except
0440   as expressly provided for under this License.  Any other attempt to
0441   copy, modify, sublicense or distribute the Document is void, and will
0442   automatically terminate your rights under this License.  However,
0443   parties who have received copies, or rights, from you under this
0444   License will not have their licenses terminated so long as such
0445   parties remain in full compliance.
0446 </p>
0447 
0448 <p>
0449   <strong>10. FUTURE REVISIONS OF THIS LICENSE</strong>
0450 </p>
0451 
0452 <p>
0453   The Free Software Foundation may publish new, revised versions
0454   of the GNU Free Documentation License from time to time.  Such new
0455   versions will be similar in spirit to the present version, but may
0456   differ in detail to address new problems or concerns.  See
0457   http://www.gnu.org/copyleft/.
0458 </p>
0459 
0460 <p>
0461   Each version of the License is given a distinguishing version number.
0462   If the Document specifies that a particular numbered version of this
0463   License "or any later version" applies to it, you have the option of
0464   following the terms and conditions either of that specified version or
0465   of any later version that has been published (not as a draft) by the
0466   Free Software Foundation.  If the Document does not specify a version
0467   number of this License, you may choose any version ever published (not
0468   as a draft) by the Free Software Foundation.
0469 </p>
0470 
0471 <h3>How to use this License for your documents</h3>
0472 
0473 <p>
0474   To use this License in a document you have written, include a copy of
0475   the License in the document and put the following copyright and
0476   license notices just after the title page:
0477 </p>
0478 
0479 <pre>
0480   Copyright (c)  YEAR  YOUR NAME.
0481   Permission is granted to copy, distribute and/or modify this document
0482   under the terms of the GNU Free Documentation License, Version 1.2
0483   or any later version published by the Free Software Foundation;
0484   with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
0485   Texts.  A copy of the license is included in the section entitled "GNU
0486   Free Documentation License".
0487 </pre>
0488 
0489 <p>
0490   If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts,
0491   replace the "with...Texts." line with this:
0492 </p>
0493 
0494 <pre>
0495   with the Invariant Sections being LIST THEIR TITLES, with the
0496   Front-Cover Texts being LIST, and with the Back-Cover Texts being LIST.
0497 </pre>
0498 
0499 <p>
0500   If you have Invariant Sections without Cover Texts, or some other
0501   combination of the three, merge those two alternatives to suit the
0502   situation.
0503 </p>
0504 
0505 <p>
0506   If your document contains nontrivial examples of program code, we
0507   recommend releasing these examples in parallel under your choice of
0508   free software license, such as the GNU General Public License,
0509   to permit their use in free software.
0510 </p>
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