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