It is similar to the GNU General Public Licensegiving readers the rights to copy, redistribute, and modify except for "invariant sections" a work and requires all copies and derivatives to be available under the same license. Copies may also be sold commercially, but, if produced in larger quantities greater thanthe original document incontri mir source code must be made available to the work's recipient. The GFDL was designed for manualstextbooks, other reference and instructional materials, and documentation which often accompanies GNU software. However, it can be used for any text-based work, regardless of subject matter. The current state of the license is version 1. Material licensed under the current version of the license can be used for any purpose, as long as the use meets certain conditions. The license explicitly separates any kind of "Document" from "Secondary Sections", which may not be integrated with the Document, but exist as front-matter materials or appendices. Secondary sections can contain information regarding the author's or publisher's relationship to the subject matter, but not any subject matter itself. While the Document itself is wholly editable, and is essentially covered by a license equivalent to but mutually incompatible with the GNU General Public Licensesome of the secondary sections have various restrictions designed primarily to deal with proper attribution to previous authors. Specifically, the authors of prior versions have to be acknowledged and certain "invariant sections" specified by the original author and dealing with his or her relationship to the subject matter may not be changed. If the material is modified, its title has to incontri mir changed unless the prior authors give permission to retain the title. The license also incontri mir provisions for the handling of front-cover incontri mir back-cover texts of books, as well as for "History", "Acknowledgements", "Dedications" and "Endorsements" sections. These features were added in part to make the license more financially attractive to commercial publishers of software documentation, some of whom were consulted during the drafting incontri mir the GFDL. The GFDL requires the ability to "copy and distribute the Document in any medium, either commercially or noncommercially" and therefore is incompatible with material that excludes commercial re-use.Account Options
You may not use technical measures to obstruct or control the reading or further copying of the copies you make or distribute. This means that you cannot publish them under DRM systems to restrict the possessors of the copies. We just unified electro-weak, ok? This could lead to the situation where there are a whole series of title pages, and dedications, in each and every copy of the book if it has a long lineage. It's like for physics getting rid of a force, right? The GFDL is meant as a way to enlist commercial publishers in funding free documentation without surrendering any vital liberty. The GFDL was designed for manuals , textbooks, other reference and instructional materials, and documentation which often accompanies GNU software. I don't know how we'll ever get there, that's gravity, it's really hard. Problems playing this file? The GNU FDL requires that licensees, when printing a document covered by the license, must also include "this License, the copyright notices, and the license notice saying this License applies to the Document". Some reasons for this are that the GFDL allows "invariant" text which cannot be modified or removed, and that its prohibition against digital rights management DRM systems applies to valid usages, like for "private copies made and not distributed".