{
    "mode": "man",
    "parameter": "GFDL",
    "section": "7",
    "url": "https://www.chedong.com/phpMan.php/man/GFDL/7/json",
    "generated": "2026-05-30T07:08:23Z",
    "sections": {
        "NAME": {
            "content": "gfdl - GNU Free Documentation License\n",
            "subsections": []
        },
        "DESCRIPTION": {
            "content": "",
            "subsections": [
                {
                    "name": "GNU Free Documentation License",
                    "content": ""
                },
                {
                    "name": "Version 1.2, November 2002",
                    "content": "Copyright (c) 2000,2001,2002 Free Software Foundation, Inc.\n59 Temple Place, Suite 330, Boston, MA  02111-1307, USA\n\nEveryone is permitted to copy and distribute verbatim copies\nof this license document, but changing it is not allowed.\n\n0.  PREAMBLE\n\nThe purpose of this License is to make a manual, textbook, or other functional and useful\ndocument free in the sense of freedom: to assure everyone the effective freedom to copy\nand redistribute it, with or without modifying it, either commercially or noncommer‐\ncially.  Secondarily, this License preserves for the author and publisher a way to get\ncredit for their work, while not being considered responsible for modifications made by\nothers.\n\nThis License is a kind of ``copyleft'', which means that derivative works of the document\nmust themselves be free in the same sense.  It complements the GNU General Public Li‐\ncense, which is a copyleft license designed for free software.\n\nWe have designed this License in order to use it for manuals for free software, because\nfree software needs free documentation: a free program should come with manuals providing\nthe same freedoms that the software does.  But this License is not limited to software\nmanuals; it can be used for any textual work, regardless of subject matter or whether it\nis published as a printed book.  We recommend this License principally for works whose\npurpose is instruction or reference.\n\n1.  APPLICABILITY AND DEFINITIONS\n\nThis License applies to any manual or other work, in any medium, that contains a notice\nplaced by the copyright holder saying it can be distributed under the terms of this Li‐\ncense.  Such a notice grants a world-wide, royalty-free license, unlimited in duration,\nto use that work under the conditions stated herein.  The ``Document'', below, refers to\nany such manual or work.  Any member of the public is a licensee, and is addressed as\n``you''.  You accept the license if you copy, modify or distribute the work in a way re‐\nquiring permission under copyright law.\n\nA ``Modified Version'' of the Document means any work containing the Document or a por‐\ntion of it, either copied verbatim, or with modifications and/or translated into another\nlanguage.\n\nA ``Secondary Section'' is a named appendix or a front-matter section of the Document\nthat deals exclusively with the relationship of the publishers or authors of the Document\nto the Document's overall subject (or to related matters) and contains nothing that could\nfall directly within that overall subject.  (Thus, if the Document is in part a textbook\nof mathematics, a Secondary Section may not explain any mathematics.)  The relationship\ncould be a matter of historical connection with the subject or with related matters, or\nof legal, commercial, philosophical, ethical or political position regarding them.\n\nThe ``Invariant Sections'' are certain Secondary Sections whose titles are designated, as\nbeing those of Invariant Sections, in the notice that says that the Document is released\nunder this License.  If a section does not fit the above definition of Secondary then it\nis not allowed to be designated as Invariant.  The Document may contain zero Invariant\nSections.  If the Document does not identify any Invariant Sections then there are none.\n\nThe ``Cover Texts'' are certain short passages of text that are listed, as Front-Cover\nTexts or Back-Cover Texts, in the notice that says that the Document is released under\nthis License.  A Front-Cover Text may be at most 5 words, and a Back-Cover Text may be at\nmost 25 words.\n\nA ``Transparent'' copy of the Document means a machine-readable copy, represented in a\nformat whose specification is available to the general public, that is suitable for re‐\nvising the document straightforwardly with generic text editors or (for images composed\nof pixels) generic paint programs or (for drawings) some widely available drawing editor,\nand that is suitable for input to text formatters or for automatic translation to a vari‐\nety of formats suitable for input to text formatters.  A copy made in an otherwise Trans‐\nparent file format whose markup, or absence of markup, has been arranged to thwart or\ndiscourage subsequent modification by readers is not Transparent.  An image format is not\nTransparent if used for any substantial amount of text.  A copy that is not ``Transpar‐\nent'' is called ``Opaque''.\n\nExamples of suitable formats for Transparent copies include plain ASCII without markup,\nTexinfo input format, LaTeX input format, @acronym{SGML} or @acronym{XML} using a pub‐\nlicly available @acronym{DTD}, and standard-conforming simple @acronym{HTML}, PostScript\nor @acronym{PDF} designed for human modification.  Examples of transparent image formats\ninclude @acronym{PNG}, @acronym{XCF} and @acronym{JPG}.  Opaque formats include propri‐\netary formats that can be read and edited only by proprietary word processors, @acro‐\nnym{SGML} or @acronym{XML} for which the @acronym{DTD} and/or processing tools are not\ngenerally available, and the machine-generated @acronym{HTML}, PostScript or @acro‐\nnym{PDF} produced by some word processors for output purposes only.\n\nThe ``Title Page'' means, for a printed book, the title page itself, plus such following\npages as are needed to hold, legibly, the material this License requires to appear in the\ntitle page.  For works in formats which do not have any title page as such, ``Title\nPage'' means the text near the most prominent appearance of the work's title, preceding\nthe beginning of the body of the text.\n\nA section ``Entitled XYZ'' means a named subunit of the Document whose title either is\nprecisely XYZ or contains XYZ in parentheses following text that translates XYZ in an‐\nother language.  (Here XYZ stands for a specific section name mentioned below, such as\n``Acknowledgements'', ``Dedications'', ``Endorsements'', or ``History''.)  To ``Preserve\nthe Title'' of such a section when you modify the Document means that it remains a sec‐\ntion ``Entitled XYZ'' according to this definition.\n\nThe Document may include Warranty Disclaimers next to the notice which states that this\nLicense applies to the Document.  These Warranty Disclaimers are considered to be in‐\ncluded by reference in this License, but only as regards disclaiming warranties: any\nother implication that these Warranty Disclaimers may have is void and has no effect on\nthe meaning of this License.\n\n2.  VERBATIM COPYING\n\nYou may copy and distribute the Document in any medium, either commercially or noncommer‐\ncially, provided that this License, the copyright notices, and the license notice saying\nthis License applies to the Document are reproduced in all copies, and that you add no\nother conditions whatsoever to those of this License.  You may not use technical measures\nto obstruct or control the reading or further copying of the copies you make or distrib‐\nute.  However, you may accept compensation in exchange for copies.  If you distribute a\nlarge enough number of copies you must also follow the conditions in section 3.\n\nYou may also lend copies, under the same conditions stated above, and you may publicly\ndisplay copies.\n\n3.  COPYING IN QUANTITY\n\nIf you publish printed copies (or copies in media that commonly have printed covers) of\nthe Document, numbering more than 100, and the Document's license notice requires Cover\nTexts, you must enclose the copies in covers that carry, clearly and legibly, all these\nCover Texts: Front-Cover Texts on the front cover, and Back-Cover Texts on the back\ncover.  Both covers must also clearly and legibly identify you as the publisher of these\ncopies.  The front cover must present the full title with all words of the title equally\nprominent and visible.  You may add other material on the covers in addition.  Copying\nwith changes limited to the covers, as long as they preserve the title of the Document\nand satisfy these conditions, can be treated as verbatim copying in other respects.\n\nIf the required texts for either cover are too voluminous to fit legibly, you should put\nthe first ones listed (as many as fit reasonably) on the actual cover, and continue the\nrest onto adjacent pages.\n\nIf you publish or distribute Opaque copies of the Document numbering more than 100, you\nmust either include a machine-readable Transparent copy along with each Opaque copy, or\nstate in or with each Opaque copy a computer-network location from which the general net‐\nwork-using public has access to download using public-standard network protocols a com‐\nplete Transparent copy of the Document, free of added material.  If you use the latter\noption, you must take reasonably prudent steps, when you begin distribution of Opaque\ncopies in quantity, to ensure that this Transparent copy will remain thus accessible at\nthe stated location until at least one year after the last time you distribute an Opaque\ncopy (directly or through your agents or retailers) of that edition to the public.\n\nIt is requested, but not required, that you contact the authors of the Document well be‐\nfore redistributing any large number of copies, to give them a chance to provide you with\nan updated version of the Document.\n\n4.  MODIFICATIONS\n\nYou may copy and distribute a Modified Version of the Document under the conditions of\nsections 2 and 3 above, provided that you release the Modified Version under precisely\nthis License, with the Modified Version filling the role of the Document, thus licensing\ndistribution and modification of the Modified Version to whoever possesses a copy of it.\nIn addition, you must do these things in the Modified Version:\n\nA.  Use in the Title Page (and on the covers, if any) a title distinct from that of the\nDocument, and from those of previous versions (which should, if there were any, be\nlisted in the History section of the Document).  You may use the same title as a pre‐\nvious version if the original publisher of that version gives permission.\n\nB.  List on the Title Page, as authors, one or more persons or entities responsible for\nauthorship of the modifications in the Modified Version, together with at least five\nof the principal authors of the Document (all of its principal authors, if it has\nfewer than five), unless they release you from this requirement.\n\nC.  State on the Title page the name of the publisher of the Modified Version, as the\npublisher.\n\nD.  Preserve all the copyright notices of the Document.\n\nE.  Add an appropriate copyright notice for your modifications adjacent to the other\ncopyright notices.\n\nF.  Include, immediately after the copyright notices, a license notice giving the public\npermission to use the Modified Version under the terms of this License, in the form\nshown in the Addendum below.\n\nG.  Preserve in that license notice the full lists of Invariant Sections and required\nCover Texts given in the Document's license notice.\n\nH.  Include an unaltered copy of this License.\n\nI.  Preserve the section Entitled ``History'', Preserve its Title, and add to it an item\nstating at least the title, year, new authors, and publisher of the Modified Version\nas given on the Title Page.  If there is no section Entitled ``History'' in the Docu‐\nment, create one stating the title, year, authors, and publisher of the Document as\ngiven on its Title Page, then add an item describing the Modified Version as stated\nin the previous sentence.\n\nJ.  Preserve the network location, if any, given in the Document for public access to a\nTransparent copy of the Document, and likewise the network locations given in the\nDocument for previous versions it was based on.  These may be placed in the ``His‐\ntory'' section.  You may omit a network location for a work that was published at\nleast four years before the Document itself, or if the original publisher of the ver‐\nsion it refers to gives permission.\n\nK.  For any section Entitled ``Acknowledgements'' or ``Dedications'', Preserve the Title\nof the section, and preserve in the section all the substance and tone of each of the\ncontributor acknowledgements and/or dedications given therein.\n\nL.  Preserve all the Invariant Sections of the Document, unaltered in their text and in\ntheir titles.  Section numbers or the equivalent are not considered part of the sec‐\ntion titles.\n\nM.  Delete any section Entitled ``Endorsements''.  Such a section may not be included in\nthe Modified Version.\n\nN.  Do not retitle any existing section to be Entitled ``Endorsements'' or to conflict in\ntitle with any Invariant Section.\n\nO.  Preserve any Warranty Disclaimers.\n\nIf the Modified Version includes new front-matter sections or appendices that qualify as\nSecondary Sections and contain no material copied from the Document, you may at your op‐\ntion designate some or all of these sections as invariant.  To do this, add their titles\nto the list of Invariant Sections in the Modified Version's license notice.  These titles\nmust be distinct from any other section titles.\n\nYou may add a section Entitled ``Endorsements'', provided it contains nothing but en‐\ndorsements of your Modified Version by various parties---for example, statements of peer\nreview or that the text has been approved by an organization as the authoritative defini‐\ntion of a standard.\n\nYou may add a passage of up to five words as a Front-Cover Text, and a passage of up to\n25 words as a Back-Cover Text, to the end of the list of Cover Texts in the Modified Ver‐\nsion.  Only one passage of Front-Cover Text and one of Back-Cover Text may be added by\n(or through arrangements made by) any one entity.  If the Document already includes a\ncover text for the same cover, previously added by you or by arrangement made by the same\nentity you are acting on behalf of, you may not add another; but you may replace the old\none, on explicit permission from the previous publisher that added the old one.\n\nThe author(s) and publisher(s) of the Document do not by this License give permission to\nuse their names for publicity for or to assert or imply endorsement of any Modified Ver‐\nsion.\n\n5.  COMBINING DOCUMENTS\n\nYou may combine the Document with other documents released under this License, under the\nterms defined in section 4 above for modified versions, provided that you include in the\ncombination all of the Invariant Sections of all of the original documents, unmodified,\nand list them all as Invariant Sections of your combined work in its license notice, and\nthat you preserve all their Warranty Disclaimers.\n\nThe combined work need only contain one copy of this License, and multiple identical In‐\nvariant Sections may be replaced with a single copy.  If there are multiple Invariant\nSections with the same name but different contents, make the title of each such section\nunique by adding at the end of it, in parentheses, the name of the original author or\npublisher of that section if known, or else a unique number.  Make the same adjustment to\nthe section titles in the list of Invariant Sections in the license notice of the com‐\nbined work.\n\nIn the combination, you must combine any sections Entitled ``History'' in the various\noriginal documents, forming one section Entitled ``History''; likewise combine any sec‐\ntions Entitled ``Acknowledgements'', and any sections Entitled ``Dedications''.  You must\ndelete all sections Entitled ``Endorsements.''\n\n6.  COLLECTIONS OF DOCUMENTS\n\nYou may make a collection consisting of the Document and other documents released under\nthis License, and replace the individual copies of this License in the various documents\nwith a single copy that is included in the collection, provided that you follow the rules\nof this License for verbatim copying of each of the documents in all other respects.\n\nYou may extract a single document from such a collection, and distribute it individually\nunder this License, provided you insert a copy of this License into the extracted docu‐\nment, and follow this License in all other respects regarding verbatim copying of that\ndocument.\n\n7.  AGGREGATION WITH INDEPENDENT WORKS\n\nA compilation of the Document or its derivatives with other separate and independent doc‐\numents or works, in or on a volume of a storage or distribution medium, is called an\n``aggregate'' if the copyright resulting from the compilation is not used to limit the\nlegal rights of the compilation's users beyond what the individual works permit.  When\nthe Document is included an aggregate, this License does not apply to the other works in\nthe aggregate which are not themselves derivative works of the Document.\n\nIf the Cover Text requirement of section 3 is applicable to these copies of the Document,\nthen if the Document is less than one half of the entire aggregate, the Document's Cover\nTexts may be placed on covers that bracket the Document within the aggregate, or the\nelectronic equivalent of covers if the Document is in electronic form.  Otherwise they\nmust appear on printed covers that bracket the whole aggregate.\n\n8.  TRANSLATION\n\nTranslation is considered a kind of modification, so you may distribute translations of\nthe Document under the terms of section 4.  Replacing Invariant Sections with transla‐\ntions requires special permission from their copyright holders, but you may include\ntranslations of some or all Invariant Sections in addition to the original versions of\nthese Invariant Sections.  You may include a translation of this License, and all the li‐\ncense notices in the Document, and any Warrany Disclaimers, provided that you also in‐\nclude the original English version of this License and the original versions of those no‐\ntices and disclaimers.  In case of a disagreement between the translation and the origi‐\nnal version of this License or a notice or disclaimer, the original version will prevail.\n\nIf a section in the Document is Entitled ``Acknowledgements'', ``Dedications'', or ``His‐\ntory'', the requirement (section 4) to Preserve its Title (section 1) will typically re‐\nquire changing the actual title.\n\n9.  TERMINATION\n\nYou may not copy, modify, sublicense, or distribute the Document except as expressly pro‐\nvided for under this License.  Any other attempt to copy, modify, sublicense or distrib‐\nute the Document is void, and will automatically terminate your rights under this Li‐\ncense.  However, parties who have received copies, or rights, from you under this License\nwill not have their licenses terminated so long as such parties remain in full compli‐\nance.\n\n10. FUTURE REVISIONS OF THIS LICENSE\n\nThe Free Software Foundation may publish new, revised versions of the GNU Free Documenta‐\ntion License from time to time.  Such new versions will be similar in spirit to the\npresent version, but may differ in detail to address new problems or concerns.  See\n<http://www.gnu.org/copyleft/>.\n\nEach version of the License is given a distinguishing version number.  If the Document\nspecifies that a particular numbered version of this License ``or any later version'' ap‐\nplies to it, you have the option of following the terms and conditions either of that\nspecified version or of any later version that has been published (not as a draft) by the\nFree Software Foundation.  If the Document does not specify a version number of this Li‐\ncense, you may choose any version ever published (not as a draft) by the Free Software\nFoundation.\n"
                },
                {
                    "name": "ADDENDUM: How to use this License for your documents",
                    "content": "To use this License in a document you have written, include a copy of the License in the doc‐\nument and put the following copyright and license notices just after the title page:\n\nCopyright (C)  <year>  <your name>.\nPermission is granted to copy, distribute and/or modify this document\nunder the terms of the GNU Free Documentation License, Version 1.2\nor any later version published by the Free Software Foundation;\nwith no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.\nA copy of the license is included in the section entitled ``GNU\nFree Documentation License''.\n\nIf you have Invariant Sections, Front-Cover Texts and Back-Cover Texts, replace the\n``with...Texts.'' line with this:\n\nwith the Invariant Sections being <list their titles>, with\nthe Front-Cover Texts being <list>, and with the Back-Cover Texts\nbeing <list>.\n\nIf you have Invariant Sections without Cover Texts, or some other combination of the three,\nmerge those two alternatives to suit the situation.\n\nIf your document contains nontrivial examples of program code, we recommend releasing these\nexamples in parallel under your choice of free software license, such as the GNU General Pub‐\nlic License, to permit their use in free software.\n"
                }
            ]
        },
        "SEE ALSO": {
            "content": "gpl(7), fsf-funding(7).\n",
            "subsections": []
        },
        "COPYRIGHT": {
            "content": "Copyright (c) 2000 Free Software Foundation, Inc.  59 Temple Place, Suite 330, Boston, MA\n02111-1307, USA\n\nEveryone is permitted to copy and distribute verbatim copies of this license document, but\nchanging it is not allowed.\n\n\n\ngcc-3.3                                      2003-03-01                                      GFDL(7)",
            "subsections": []
        }
    },
    "summary": "gfdl - GNU Free Documentation License",
    "flags": [],
    "examples": [],
    "see_also": [
        {
            "name": "gpl",
            "section": "7",
            "url": "https://www.chedong.com/phpMan.php/man/gpl/7/json"
        },
        {
            "name": "fsf-funding",
            "section": "7",
            "url": "https://www.chedong.com/phpMan.php/man/fsf-funding/7/json"
        }
    ]
}