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1 | |||
2 | LaTeX Project Public License | ||
3 | ============================ | ||
4 | |||
5 | LPPL Version 1.0 1999-03-01 | ||
6 | |||
7 | Copyright 1999 LaTeX3 Project | ||
8 | Everyone is permitted to copy and distribute verbatim copies | ||
9 | of this license document, but modification is not allowed. | ||
10 | |||
11 | |||
12 | Preamble | ||
13 | ======== | ||
14 | |||
15 | The LaTeX Project Public License (LPPL) is the license under which the | ||
16 | base LaTeX distribution is distributed. As described below you may use | ||
17 | this licence for any software that you wish to distribute. | ||
18 | |||
19 | It may be particularly suitable if your software is TeX related (such | ||
20 | as a LaTeX package file) but it may be used for any software, even if | ||
21 | it is unrelated to TeX. | ||
22 | |||
23 | To use this license, the files of your distribution should have an | ||
24 | explicit copyright notice giving your name and the year, together | ||
25 | with a reference to this license. | ||
26 | |||
27 | A typical example would be | ||
28 | |||
29 | %% pig.sty | ||
30 | %% Copyright 2001 M. Y. Name | ||
31 | |||
32 | % This program can redistributed and/or modified under the terms | ||
33 | % of the LaTeX Project Public License Distributed from CTAN | ||
34 | % archives in directory macros/latex/base/lppl.txt; either | ||
35 | % version 1 of the License, or (at your option) any later version. | ||
36 | |||
37 | Given such a notice in the file, the conditions of this document would | ||
38 | apply, with: | ||
39 | |||
40 | `The Program` referring to the software `pig.sty` and | ||
41 | `The Copyright Holder` referring to the person `M. Y. Name`. | ||
42 | |||
43 | To see a real example, see the file legal.txt which carries the | ||
44 | copyright notice for the base latex distribution. | ||
45 | |||
46 | This license gives terms under which files of The Program may be | ||
47 | distributed and modified. Individual files may have specific further | ||
48 | constraints on modification, but no file should have restrictions on | ||
49 | distribution other than those specified below. | ||
50 | This is to ensure that a distributor wishing to distribute a complete | ||
51 | unmodified copy of The Program need only check the conditions in this | ||
52 | file, and does not need to check every file in The Program for extra | ||
53 | restrictions. If you do need to modify the distribution terms of some | ||
54 | files, do not refer to this license, instead distribute The Program | ||
55 | under a different license. You may use the parts of the text of LPPL as | ||
56 | a model for your own license, but your license should not directly refer | ||
57 | to the LPPL or otherwise give the impression that The Program is | ||
58 | distributed under the LPPL. | ||
59 | |||
60 | |||
61 | |||
62 | The LaTeX Project Public License | ||
63 | ================================ | ||
64 | Terms And Conditions For Copying, Distribution And Modification | ||
65 | =============================================================== | ||
66 | |||
67 | |||
68 | WARRANTY | ||
69 | ======== | ||
70 | |||
71 | There is no warranty for The Program, to the extent permitted by | ||
72 | applicable law. Except when otherwise stated in writing, The | ||
73 | Copyright Holder provides The Program `as is` without warranty of any | ||
74 | kind, either expressed or implied, including, but not limited to, the | ||
75 | implied warranties of merchantability and fitness for a particular | ||
76 | purpose. The entire risk as to the quality and performance of the | ||
77 | program is with you. Should The Program prove defective, you assume | ||
78 | the cost of all necessary servicing, repair or correction. | ||
79 | |||
80 | In no event unless required by applicable law or agreed to in writing | ||
81 | will The Copyright Holder, or any of the individual authors named in | ||
82 | the source for The Program, be liable to you for damages, including | ||
83 | any general, special, incidental or consequential damages arising out | ||
84 | of any use of The Program or out of inability to use The Program | ||
85 | (including but not limited to loss of data or data being rendered | ||
86 | inaccurate or losses sustained by you or by third parties as a result | ||
87 | of a failure of The Program to operate with any other programs), even | ||
88 | if such holder or other party has been advised of the possibility of | ||
89 | such damages. | ||
90 | |||
91 | |||
92 | DISTRIBUTION | ||
93 | ============ | ||
94 | |||
95 | Redistribution of unchanged files is allowed provided that all files | ||
96 | that make up the distribution of The Program are distributed. | ||
97 | In particular this means that The Program has to be distributed | ||
98 | including its documentation if documentation was part of the original | ||
99 | distribution. | ||
100 | |||
101 | The distribution of The Program will contain a prominent file | ||
102 | listing all the files covered by this license. | ||
103 | |||
104 | If you receive only some of these files from someone, complain! | ||
105 | |||
106 | The distribution of changed versions of certain files included in the | ||
107 | The Program, and the reuse of code from The Program, are allowed | ||
108 | under the following restrictions: | ||
109 | |||
110 | * It is allowed only if the legal notice in the file does not | ||
111 | expressly forbid it. | ||
112 | See note below, under "Conditions on individual files". | ||
113 | |||
114 | * You rename the file before you make any changes to it, unless the | ||
115 | file explicitly says that renaming is not required. Any such changed | ||
116 | files must be distributed under a license that forbids distribution | ||
117 | of those files, and any files derived from them, under the names used | ||
118 | by the original files in the distribution of The Program. | ||
119 | |||
120 | * You change any `identification string` in The Program to clearly | ||
121 | indicate that the file is not part of the standard system. | ||
122 | |||
123 | * If The Program includes an `error report address` so that errors | ||
124 | may be reported to The Copyright Holder, or other specified | ||
125 | addresses, this address must be changed in any modified versions of | ||
126 | The Program, so that reports for files not maintained by the | ||
127 | original program maintainers are directed to the maintainers of the | ||
128 | changed files. | ||
129 | |||
130 | * You acknowledge the source and authorship of the original version | ||
131 | in the modified file. | ||
132 | |||
133 | * You also distribute the unmodified version of the file or | ||
134 | alternatively provide sufficient information so that the | ||
135 | user of your modified file can be reasonably expected to be | ||
136 | able to obtain an original, unmodified copy of The Program. | ||
137 | For example, you may specify a URL to a site that you expect | ||
138 | will freely provide the user with a copy of The Program (either | ||
139 | the version on which your modification is based, or perhaps a | ||
140 | later version). | ||
141 | |||
142 | * If The Program is intended to be used with, or is based on, LaTeX, | ||
143 | then files with the following file extensions which have special | ||
144 | meaning in LaTeX Software, have special modification rules under the | ||
145 | license: | ||
146 | |||
147 | - Files with extension `.ins` (installation files): these files may | ||
148 | not be modified at all because they contain the legal notices | ||
149 | that are placed in the generated files. | ||
150 | |||
151 | - Files with extension `.fd` (LaTeX font definitions files): these | ||
152 | files are allowed to be modified without changing the name, but | ||
153 | only to enable use of all available fonts and to prevent attempts | ||
154 | to access unavailable fonts. However, modified files are not | ||
155 | allowed to be distributed in place of original files. | ||
156 | |||
157 | - Files with extension `.cfg` (configuration files): these files | ||
158 | can be created or modified to enable easy configuration of the | ||
159 | system. The documentation in cfgguide.tex in the base LaTeX | ||
160 | distribution describes when it makes sense to modify or generate | ||
161 | such files. | ||
162 | |||
163 | |||
164 | The above restrictions are not intended to prohibit, and hence do | ||
165 | not apply to, the updating, by any method, of a file so that it | ||
166 | becomes identical to the latest version of that file in The Program. | ||
167 | |||
168 | ======================================================================== | ||
169 | |||
170 | NOTES | ||
171 | ===== | ||
172 | |||
173 | We believe that these requirements give you the freedom you to make | ||
174 | modifications that conform with whatever technical specifications you | ||
175 | wish, whilst maintaining the availability, integrity and reliability of | ||
176 | The Program. If you do not see how to achieve your goal whilst | ||
177 | adhering to these requirements then read the document cfgguide.tex | ||
178 | in the base LaTeX distribution for suggestions. | ||
179 | |||
180 | Because of the portability and exchangeability aspects of systems | ||
181 | like LaTeX, The LaTeX3 Project deprecates the distribution of | ||
182 | non-standard versions of components of LaTeX or of generally available | ||
183 | contributed code for them but such distributions are permitted under the | ||
184 | above restrictions. | ||
185 | |||
186 | The document modguide.tex in the base LaTeX distribution details | ||
187 | the reasons for the legal requirements detailed above. | ||
188 | Even if The Program is unrelated to LaTeX, the argument in | ||
189 | modguide.tex may still apply, and should be read before | ||
190 | a modified version of The Program is distributed. | ||
191 | |||
192 | |||
193 | Conditions on individual files | ||
194 | ============================== | ||
195 | |||
196 | The individual files may bear additional conditions which supersede | ||
197 | the general conditions on distribution and modification contained in | ||
198 | this file. If there are any such files, the distribution of The | ||
199 | Program will contain a prominent file that lists all the exceptional | ||
200 | files. | ||
201 | |||
202 | Typical examples of files with more restrictive modification | ||
203 | conditions would be files that contain the text of copyright notices. | ||
204 | |||
205 | * The conditions on individual files differ only in the | ||
206 | extent of *modification* that is allowed. | ||
207 | |||
208 | * The conditions on *distribution* are the same for all the files. | ||
209 | Thus a (re)distributor of a complete, unchanged copy of The Program | ||
210 | need meet only the conditions in this file; it is not necessary to | ||
211 | check the header of every file in the distribution to check that a | ||
212 | distribution meets these requirements. | ||
213 | |||