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1 usata 1.1
2     The LaTeX Project Public License
3     =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
4    
5     LPPL Version 1.3 2003-12-01
6    
7     Copyright 1999 2002-03 LaTeX3 Project
8     Everyone is allowed to distribute verbatim copies of this
9     license document, but modification of it is not allowed.
10    
11    
12     PREAMBLE
13     ========
14    
15     The LaTeX Project Public License (LPPL) is the primary license under
16     which the the LaTeX kernel and the base LaTeX packages are distributed.
17    
18     You may use this license for any work of which you hold the copyright
19     and which you wish to distribute. This license may be particularly
20     suitable if your work is TeX-related (such as a LaTeX package), but
21     you may use it with small modifications even if your work is unrelated
22     to TeX.
23    
24     The section `WHETHER AND HOW TO DISTRIBUTE WORKS UNDER THIS LICENSE',
25     below, gives instructions, examples, and recommendations for authors
26     who are considering distributing their works under this license.
27    
28     This license gives conditions under which a work may be distributed
29     and modified, as well as conditions under which modified versions of
30     that work may be distributed.
31    
32     We, the LaTeX3 Project, believe that the conditions below give you
33     the freedom to make and distribute modified versions of your work
34     that conform with whatever technical specifications you wish while
35     maintaining the availability, integrity, and reliability of
36     that work. If you do not see how to achieve your goal while
37     meeting these conditions, then read the document `cfgguide.tex'
38     and `modguide.tex' in the base LaTeX distribution for suggestions.
39    
40    
41     DEFINITIONS
42     ===========
43    
44     In this license document the following terms are used:
45    
46     `Work'
47     Any work being distributed under this License.
48    
49     `Derived Work'
50     Any work that under any applicable law is derived from the Work.
51    
52     `Modification'
53     Any procedure that produces a Derived Work under any applicable
54     law -- for example, the production of a file containing an
55     original file associated with the Work or a significant portion of
56     such a file, either verbatim or with modifications and/or
57     translated into another language.
58    
59     `Modify'
60     To apply any procedure that produces a Derived Work under any
61     applicable law.
62    
63     `Distribution'
64     Making copies of the Work available from one person to another, in
65     whole or in part. Distribution includes (but is not limited to)
66     making any electronic components of the Work accessible by
67     file transfer protocols such as FTP or HTTP or by shared file
68     systems such as Sun's Network File System (NFS).
69    
70     `Compiled Work'
71     A version of the Work that has been processed into a form where it
72     is directly usable on a computer system. This processing may
73     include using installation facilities provided by the Work,
74     transformations of the Work, copying of components of the Work, or
75     other activities. Note that modification of any installation
76     facilities provided by the Work constitutes modification of the Work.
77    
78     `Current Maintainer'
79     A person or persons nominated as such within the Work. If there is
80     no such explicit nomination then it is the `Copyright Holder' under
81     any applicable law.
82    
83     `Base Interpreter'
84     A program or process that is normally needed for running or
85     interpreting a part or the whole of the Work.
86     A Base Interpreter may depend on external components but these
87     are not considered part of the Base Interpreter provided that each
88     external component clearly identifies itself whenever it is used
89     interactively. Unless explicitly specified when applying the
90     license to the Work, the only applicable Base Interpreter is a
91     "LaTeX-Format".
92    
93    
94    
95     CONDITIONS ON DISTRIBUTION AND MODIFICATION
96     ===========================================
97    
98     1. Activities other than distribution and/or modification of the Work
99     are not covered by this license; they are outside its scope. In
100     particular, the act of running the Work is not restricted and no
101     requirements are made concerning any offers of support for the Work.
102    
103     2. You may distribute a complete, unmodified copy of the Work as you
104     received it. Distribution of only part of the Work is considered
105     modification of the Work, and no right to distribute such a Derived
106     Work may be assumed under the terms of this clause.
107    
108     3. You may distribute a Compiled Work that has been generated from a
109     complete, unmodified copy of the Work as distributed under Clause 2
110     above, as long as that Compiled Work is distributed in such a way that
111     the recipients may install the Compiled Work on their system exactly
112     as it would have been installed if they generated a Compiled Work
113     directly from the Work.
114    
115     4. If you are the Current Maintainer of the Work, you may, without
116     restriction, modify the Work, thus creating a Derived Work. You may
117     also distribute the Derived Work without restriction, including
118     Compiled Works generated from the Derived Work. Derived Works
119     distributed in this manner by the Current Maintainer are considered to
120     be updated versions of the Work.
121    
122     5. If you are not the Current Maintainer of the Work, you may modify
123     your copy of the Work, thus creating a Derived Work based on the Work,
124     and compile this Derived Work, thus creating a Compiled Work based on
125     the Derived Work.
126    
127     6. If you are not the Current Maintainer of the Work, you may
128     distribute a Derived Work provided the following conditions are met
129     for every component of the Work unless that component clearly states
130     in the copyright notice that it is exempt from that condition. Only
131     the Current Maintainer is allowed to add such statements of exemption
132     to a component of the Work.
133    
134     a. If a component of this Derived Work can be a direct replacement
135     for a component of the Work when that component is used with the
136     Base Interpreter, then, wherever this component of the Work
137     identifies itself to the user when used interactively with that
138     Base Interpreter, the replacement component of this Derived Work
139     clearly and unambiguously identifies itself as a modified version
140     of this component to the user when used interactively with that
141     Base Interpreter.
142    
143     b. Every component of the Derived Work contains prominent notices
144     detailing the nature of the changes to that component, or a
145     prominent reference to another file that is distributed as part
146     of the Derived Work and that contains a complete and accurate log
147     of the changes.
148    
149     c. No information in the Derived Work implies that any persons,
150     including (but not limited to) the authors of the original version
151     of the Work, provide any support, including (but not limited to)
152     the reporting and handling of errors, to recipients of the
153     Derived Work unless those persons have stated explicitly that
154     they do provide such support for the Derived Work.
155    
156     d. You distribute at least one of the following with the Derived Work:
157    
158     1. A complete, unmodified copy of the Work;
159     if your distribution of a modified component is made by
160     offering access to copy the modified component from a
161     designated place, then offering equivalent access to copy
162     the Work from the same or some similar place meets this
163     condition, even though third parties are not compelled to
164     copy the Work along with the modified component;
165    
166     2. Information that is sufficient to obtain a complete, unmodified
167     copy of the Work.
168    
169     7. If you are not the Current Maintainer of the Work, you may
170     distribute a Compiled Work generated from a Derived Work, as long as
171     the Derived Work is distributed to all recipients of the Compiled
172     Work, and as long as the conditions of Clause 6, above, are met with
173     regard to the Derived Work.
174    
175     8. The conditions above are not intended to prohibit, and hence do
176     not apply to, the modification, by any method, of any component so that it
177     becomes identical to an updated version of that component of the Work as
178     it is distributed by the Current Maintainer under Clause 4, above.
179    
180     9. Distribution of the Work or any Derived Work in an alternative
181     format, where the Work or that Derived Work (in whole or in part) is
182     then produced by applying some process to that format, does not relax or
183     nullify any sections of this license as they pertain to the results of
184     applying that process.
185    
186     10. a. A Derived Work may be distributed under a different license
187     provided that license itself honors the conditions listed in
188     Clause 6 above, in regard to the Work, though it does not have
189     to honor the rest of the conditions in this license.
190    
191     b. If a Derived Work is distributed under this license, that
192     Derived Work must provide sufficient documentation as part of
193     itself to allow each recipient of that Derived Work to honor the
194     restrictions in Clause 6 above, concerning changes from the Work.
195    
196     11. This license places no restrictions on works that are unrelated to
197     the Work, nor does this license place any restrictions on aggregating
198     such works with the Work by any means.
199    
200     12. Nothing in this license is intended to, or may be used to, prevent
201     complete compliance by all parties with all applicable laws.
202    
203    
204     NO WARRANTY
205     ===========
206    
207     There is no warranty for the Work. Except when otherwise stated in
208     writing, the Copyright Holder provides the Work `as is', without
209     warranty of any kind, either expressed or implied, including, but not
210     limited to, the implied warranties of merchantability and fitness for
211     a particular purpose. The entire risk as to the quality and performance
212     of the Work is with you. Should the Work prove defective, you
213     assume the cost of all necessary servicing, repair, or correction.
214    
215     In no event unless agreed to in writing will the Copyright Holder, or
216     any author named in the components of the Work, or any other party who
217     may distribute and/or modify the Work as permitted above, be liable to
218     you for damages, including any general, special, incidental or
219     consequential damages arising out of any use of the Work or out of
220     inability to use the Work (including, but not limited to, loss of
221     data, data being rendered inaccurate, or losses sustained by anyone as
222     a result of any failure of the Work to operate with any other
223     programs), even if the Copyright Holder or said author or said other
224     party has been advised of the possibility of such damages.
225    
226    
227     MAINTENANCE OF THE WORK
228     =======================
229    
230     The Work has the status `author-maintained' if the Copyright Holder
231     explicitly and prominently states near the primary copyright notice in
232     the Work that the Work can only be maintained by the Copyright Holder
233     or simply that is `author-maintained'.
234    
235     The Work has the status `maintained' if there is a Current Maintainer
236     who has indicated in the Work that they are willing to receive error
237     reports for the Work (for example, by supplying a valid e-mail
238     address). It is not required for the Current Maintainer to acknowledge
239     or act upon these error reports.
240    
241     The Work changes from status `maintained' to `unmaintained' if there
242     is no Current Maintainer, or the person stated to be Current
243     Maintainer of the work cannot be reached through the indicated means
244     of communication for a period of six months, and there are no other
245     significant signs of active maintenance.
246    
247     You can become the Current Maintainer of the Work by agreement with
248     any existing Current Maintainer to take over this role.
249    
250     If the Work is unmaintained, you can become the Current Maintainer of
251     the Work through the following steps:
252    
253     1. Make a reasonable attempt to trace the Current Maintainer (and
254     the Copyright Holder, if the two differ) through the means of
255     an Internet or similar search.
256    
257     2. If this search is successful, then enquire whether the Work
258     is still maintained.
259    
260     a. If it is being maintained, then ask the Current Maintainer
261     to update their communication data within one month.
262    
263     b. If the search is unsuccessful or no action to resume active
264     maintenance is taken by the Current Maintainer, then announce
265     within the pertinent community your intention to take over
266     maintenance. (If the Work is a LaTeX work, this could be
267     done, for example, by posting to comp.text.tex.)
268    
269     3a. If the Current Maintainer is reachable and agrees to pass
270     maintenance of the Work to you, then this takes effect
271     immediately upon announcement.
272    
273     b. If the Current Maintainer is not reachable and the Copyright
274     Holder agrees that maintenance of the Work be passed to you,
275     then this takes effect immediately upon announcement.
276    
277     4. If you make an `intention announcement' as described in 2b. above
278     and after three months your intention is challenged neither by
279     the Current Maintainer nor by the Copyright Holder nor by other
280     people, then you may arrange for the Work to be changed so as
281     to name you as the (new) Current Maintainer.
282    
283     5. If the previously unreachable Current Maintainer becomes
284     reachable once more within three months of a change completed
285     under the terms of 3b) or 4), then that Current Maintainer must
286     become or remain the Current Maintainer upon request provided
287     they then update their communication data within one month.
288    
289     A change in the Current Maintainer does not, of itself, alter the fact
290     that the Work is distributed under the LPPL license.
291    
292     If you become the Current Maintainer of the Work, you should
293     immediately provide, within the Work, a prominent and unambiguous
294     statement of your status as Current Maintainer. You should also
295     announce your new status to the same pertinent community as
296     in 2b) above.
297    
298    
299     WHETHER AND HOW TO DISTRIBUTE WORKS UNDER THIS LICENSE
300     ======================================================
301    
302     This section contains important instructions, examples, and
303     recommendations for authors who are considering distributing their
304     works under this license. These authors are addressed as `you' in
305     this section.
306    
307     Choosing This License or Another License
308     ----------------------------------------
309    
310     If for any part of your work you want or need to use *distribution*
311     conditions that differ significantly from those in this license, then
312     do not refer to this license anywhere in your work but, instead,
313     distribute your work under a different license. You may use the text
314     of this license as a model for your own license, but your license
315     should not refer to the LPPL or otherwise give the impression that
316     your work is distributed under the LPPL.
317    
318     The document `modguide.tex' in the base LaTeX distribution explains
319     the motivation behind the conditions of this license. It explains,
320     for example, why distributing LaTeX under the GNU General Public
321     License (GPL) was considered inappropriate. Even if your work is
322     unrelated to LaTeX, the discussion in `modguide.tex' may still be
323     relevant, and authors intending to distribute their works under any
324     license are encouraged to read it.
325    
326     A Recommendation on Modification Without Distribution
327     -----------------------------------------------------
328    
329     It is wise never to modify a component of the Work, even for your own
330     personal use, without also meeting the above conditions for
331     distributing the modified component. While you might intend that such
332     modifications will never be distributed, often this will happen by
333     accident -- you may forget that you have modified that component; or
334     it may not occur to you when allowing others to access the modified
335     version that you are thus distributing it and violating the conditions
336     of this license in ways that could have legal implications and, worse,
337     cause problems for the community. It is therefore usually in your
338     best interest to keep your copy of the Work identical with the public
339     one. Many works provide ways to control the behavior of that work
340     without altering any of its licensed components.
341    
342     How to Use This License
343     -----------------------
344    
345     To use this license, place in each of the components of your work both
346     an explicit copyright notice including your name and the year the work
347     was authored and/or last substantially modified. Include also a
348     statement that the distribution and/or modification of that
349     component is constrained by the conditions in this license.
350    
351     Here is an example of such a notice and statement:
352    
353     %% pig.dtx
354     %% Copyright 2003 M. Y. Name
355     %
356     % This work may be distributed and/or modified under the
357     % conditions of the LaTeX Project Public License, either version 1.3
358     % of this license or (at your option) any later version.
359     % The latest version of this license is in
360     % http://www.latex-project.org/lppl.txt
361     % and version 1.3 or later is part of all distributions of LaTeX
362     % version 2003/12/01 or later.
363     %
364     % This work has the LPPL maintenance status "maintained".
365     %
366     % This Current Maintainer of this work is M. Y. Name.
367     %
368     % This work consists of the files pig.dtx and pig.ins
369     % and the derived file pig.sty.
370    
371     Given such a notice and statement in a file, the conditions
372     given in this license document would apply, with the `Work' referring
373     to the three files `pig.dtx', `pig.ins', and `pig.sty' (the last being
374     generated from `pig.dtx' using `pig.ins'), the `Base Interpreter'
375     referring to any "LaTeX-Format", and both `Copyright Holder' and
376     `Current Maintainer' referring to the person `M. Y. Name'.
377    
378     To prevent the Maintenance section of LPPL from allowing someone else
379     to become the Current Maintainer without your agreement, you could
380     change "maintained" above into "author-maintained".
381    
382    
383     Important Recommendations
384     -------------------------
385    
386     Defining What Constitutes the Work
387    
388     The LPPL requires that distributions of the Work contain all the
389     files of the Work. It is therefore important that you provide a
390     way for the licensee to determine which files constitute the Work.
391     This could, for example, be achieved by explicitly listing all the
392     files of the Work near the copyright notice of each file or by
393     using a line such as:
394    
395     % This work consists of all files listed in manifest.txt.
396    
397     in that place. In the absence of an unequivocal list it might be
398     impossible for the licensee to determine what is considered by you
399     to comprise the Work and, in such a case, the licensee would be
400     entitled to make reasonable conjectures as to which files comprise
401     the Work.

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