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<section id="licenses-gfdl-section-5" xreflabel="Modification">
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<title>Modifications</title>
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<para>You may copy and distribute a Modified Version of the
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Document under the conditions of sections
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linkend="licenses-gfdl-section-3" /> and
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linkend="licenses-gfdl-section-4" /> above, provided that you
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release the Modified Version under precisely this License, with
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the Modified Version filling the role of the Document, thus
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licensing distribution and modification of the Modified Version to
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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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<orderedlist numeration="upperalpha">
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<listitem>
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<para> Use in the Title Page (and on the covers, if any) a
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title distinct from that of the Document, and from those
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of previous versions (which should, if there were any, be
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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
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publisher of that version gives permission.</para>
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</listitem>
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<listitem>
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<para>List on the Title Page, as authors, one or more
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persons or entities responsible for authorship of the
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modifications in the Modified Version, together with at
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least five of the principal authors of the Document (all
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of its principal authors, if it has fewer than five),
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unless they release you from this requirement.</para>
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</listitem>
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<listitem>
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<para>State on the Title page the name of the publisher of
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the Modified Version, as the publisher.</para>
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</listitem>
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<listitem>
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<para>Preserve all the copyright notices of the
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Document.</para>
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</listitem>
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<listitem>
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<para>Add an appropriate copyright notice for your
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modifications adjacent to the other copyright
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notices.</para>
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</listitem>
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<listitem>
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<para>Include, immediately after the copyright notices, a
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license notice giving the public permission to use the
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Modified Version under the terms of this License, in the
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form shown in the Addendum below.</para>
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</listitem>
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<listitem>
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<para>Preserve in that license notice the full lists of
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Invariant Sections and required Cover Texts given in the
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Document's license notice.</para>
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</listitem>
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<listitem>
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<para>Include an unaltered copy of this License.</para>
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</listitem>
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<listitem>
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<para>Preserve the section Entitled
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<quote>History</quote>, Preserve its Title, and add to it
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an item stating at least the title, year, new authors, and
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publisher of the Modified Version as given on the Title
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Page. If there is no section Entitled
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<quote>History</quote> in the Document, create one stating
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the title, year, authors, and publisher of the Document as
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given on its Title Page, then add an item describing the
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Modified Version as stated in the previous
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sentence.</para>
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</listitem>
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<listitem>
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<para>Preserve the network location, if any, given in the
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Document for public access to a Transparent copy of the
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Document, and likewise the network locations given in the
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Document for previous versions it was based on. These may
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be placed in the <quote>History</quote> section. You may
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omit a network location for a work that was published at
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least four years before the Document itself, or if the
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original publisher of the version it refers to gives
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permission.</para>
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</listitem>
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<listitem>
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<para>For any section Entitled
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<quote>Acknowledgements</quote> or
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<quote>Dedications</quote>, Preserve the Title of the
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section, and preserve in the section all the substance and
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tone of each of the contributor acknowledgements and/or
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dedications given therein.</para>
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</listitem>
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<listitem>
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<para>Preserve all the Invariant Sections of the Document,
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unaltered in their text and in their titles. Section
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numbers or the equivalent are not considered part of the
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section titles.</para>
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</listitem>
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<listitem>
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<para>Delete any section Entitled <quote>Endorsements</quote>. Such
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a section may not be included in the Modified
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Version.</para>
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</listitem>
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<listitem>
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<para>Do not retitle any existing section to be Entitled
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<quote>Endorsements</quote> or to conflict in title with
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any Invariant Section.</para>
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</listitem>
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<listitem>
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<para>Preserve any Warranty Disclaimers.</para>
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</listitem>
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</orderedlist>
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</para>
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<para>If the Modified Version includes new front-matter sections
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or appendices that qualify as Secondary Sections and contain no
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material copied from the Document, you may at your option
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designate some or all of these sections as invariant. To do this,
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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
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other section titles.</para>
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<para>You may add a section Entitled <quote>Endorsements</quote>,
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provided it contains nothing but endorsements of your Modified
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Version by various parties–for example, statements of peer
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review or that the text has been approved by an organization as
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the authoritative definition of a standard.</para>
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<para>You may add a passage of up to five words as a Front-Cover
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Text, and a passage of up to 25 words as a Back-Cover Text, to the
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end of the list of Cover Texts in the Modified Version. Only one
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passage of Front-Cover Text and one of Back-Cover Text may be
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added by (or through arrangements made by) any one entity. If the
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Document already includes a cover text for the same cover,
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previously added by you or by arrangement made by the same entity
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you are acting on behalf of, you may not add another; but you may
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replace the old one, on explicit permission from the previous
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publisher that added the old one.</para>
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<para>The author(s) and publisher(s) of the Document do not by
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this License give permission to use their names for publicity for
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or to assert or imply endorsement of any Modified Version.</para>
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</section>
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