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1 $Id: LICENSE.TL 52869 2019-11-20 02:36:55Z karl $
2
3 COPYING CONDITIONS FOR TeX Live:
4
5 To the best of our knowledge, all software in the TeX Live distribution
6 is freely redistributable (libre, that is, not necessarily gratis),
7 within the Free Software Foundation's definition and the Debian Free
8 Software Guidelines. Where the two conflict, we generally follow the
9 FSF. If you find any non-free files included, please contact us
10 (references given at the end).
11
12 That said, TeX Live has neither a single copyright holder nor a single
13 license covering its entire contents, since it is a collection of many
14 independent packages. Therefore, you may copy, modify, and/or
15 redistribute software from TeX Live only if you comply with the
16 requirements placed thereon by the owners of the respective packages.
17
18 To most easily learn these requirements, we suggest checking the TeX
19 Catalogue at: https://ctan.org/tex-archive/help/Catalogue/ (or any
20 CTAN mirror). Of course the legal statements within the packages
21 themselves are the final authority.
22
23 In some cases, TeX Live is distributed with a snapshot of the CTAN
24 archive, which is entirely independent of and separable from TeX Live
25 itself. (The TeX Collection DVD is one example of this.) Please be
26 aware that the CTAN snapshot contains many files which are *not* freely
27 redistributable; see LICENSE.CTAN for more information.
28
29 To state explicitly what is implied by the above: Because TeX Live is
30 free software, there is no warranty; not even for MERCHANTABILITY or
31 FITNESS FOR A PARTICULAR PURPOSE.
32
33
34 GUIDELINES FOR REDISTRIBUTION:
35
36 In general, you may redistribute TeX Live, with or without modification,
37 for profit or not, according to the usual free software tenets. Here
38 are some general guidelines for doing so:
39
40 - If you make any changes to the TeX Live distribution or any
41 package it contains, besides complying with any licensing requirements,
42 you must prominently mention such changes in your modified distribution
43 so that users do not take your work for ours, and know to contact you,
44 not us, in case of questions or problems. A new top-level file
45 README.<yourwork> is a good place to describe the general situation.
46
47 - Especially (but not necessarily) if changes or additions are made, we
48 recommend a clearly different title, such as "<your work> DVD, based on
49 TeX Live YYYY", where YYYY is the release year of TeX Live you are
50 using. This credits both our work and yours.
51
52 - You absolutely may *not* place your own copyright on the entire
53 distribution, since it is not your work. Statements such as "all rights
54 reserved" and "may not be reproduced" are especially reprehensible,
55 since they are antithetical to the free software principles under which
56 TeX Live is produced.
57
58 - You may use any cover or media label designs that you wish. Such
59 packaging and marketing details are not covered by any TeX Live license.
60
61 - Finally, we make the following requests (not legal requirements):
62
63 a) Acknowledging that TeX Live is developed as a joint effort by all TeX
64 user groups, and encouraging the user/reader to join their user group
65 of choice, as listed on the web page https://tug.org/usergroups.html.
66
67 b) Referencing the TeX Live home page: https://tug.org/texlive/
68
69 Such information may be placed on the label of your media, your cover,
70 and/or in accompanying text (for instance, in the acknowledgements
71 section of a book).
72
73 Finally, although it is again not a requirement, we'd like to invite any
74 redistributors to make a donation to the project, whether cash or
75 in-kind, for example via https://www.tug.org/donate/dev.html. Thanks.
76
77
78 If you have any questions or comments, *please* contact us. In general,
79 we appreciate being given the chance to review any TeX Live-related
80 material in advance of publication, simply to avoid mistakes. It is
81 much better to correct text on a CD label or in a book before thousands
82 of copies are made!
83
84 We are also happy to keep anyone planning a publication informed as to
85 our deadlines and progress. Just let us know. However, be aware that
86 TeX Live is produced entirely by volunteers, and no dates can be
87 guaranteed.
88
89
90 LICENSING FOR NEW PACKAGES:
91
92 Finally, we have been asked what license to use for new work. To be
93 considered for inclusion on TeX Live, a package must use a free software
94 license, such as the LaTeX Project Public License, the GNU General
95 Public License, the modified BSD license, etc. (Please use an existing
96 license instead of making up your own.) Furthermore, all sources must
97 be available, including for documentation files. Please see
98 https://tug.org/texlive/pkgcontrib.html for more information, and other
99 considerations.
100
101 Thanks for your interest in TeX.
102
103 - Karl Berry, for the TeX Live project
104
105 ------------------------------------------------------------
106 TeX Live mailing list: https://lists.tug.org/tex-live
107 TeX Live home page: https://tug.org/texlive/
108
109 The FSF's free software definition: http://www.gnu.org/philosophy/free-sw.html
110 Debian Free Software Guidelines: http://www.debian.org/intro/free
111 FSF commentary on existing licenses: http://www.gnu.org/licenses/license-list.html
112
113 LPPL: http://latex-project.org/lppl.html or texmf-dist/doc/latex/base/lppl.txt
114 LPPL rationale: texmf-dist/doc/latex/base/modguide.pdf