Licenses/lppl-1.3c.txt

LPPL Version 1.3c 2008-05-04


Copyright 1999 2002-2008 LaTeX3 Project

Everyone is allowed to distribute verbatim copies of this license
document, but modification of it is not allowed.

PREAMBLE
The LaTeX Project Public License (LPPL) is the primary license under
which the LaTeX kernel and the base LaTeX packages are
distributed.

You may use this license for any work of which you hold the copyright
and which you wish to distribute. This license may be particularly
suitable if your work is TeX-related (such as a LaTeX package), but
it is written in such a way that you can use it even if your work is
unrelated to TeX.

The section `WHETHER AND HOW TO DISTRIBUTE WORKS UNDER THIS LICENSE’,
below, gives instructions, examples, and recommendations for authors
who are considering distributing their works under this license.

This license gives conditions under which a work may be distributed
and modified, as well as conditions under which modified versions of
that work may be distributed.

We, the LaTeX3 Project, believe that the conditions below give you the
freedom to make and distribute modified versions of your work that
conform with whatever technical specifications you wish while
maintaining the availability, integrity, and reliability of that
work. If you do not see how to achieve your goal while meeting these
conditions, then read the document `cfgguide.tex’ and `modguide.tex’
in the base LaTeX distribution for suggestions.

DEFINITIONS
In this license document the following terms are used:

`Work’
Any work being distributed under this License.
`Derived Work’
Any work that under any applicable law is derived from the
Work.
`Modification’
Any procedure that produces a Derived Work under any applicable
law — for example, the production of a file containing an
original file associated with the Work or a significant portion of
such a file, either verbatim or with modifications and/or translated
into another language.
`Modify’
To apply any procedure that produces a Derived Work under any
applicable law.
`Distribution’
Making copies of the Work available from one person to another, in
whole or in part. Distribution includes (but is not limited to)
making any electronic components of the Work accessible by file
transfer protocols such as FTP or HTTP or by shared file systems
such as Sun’s Network File System (NFS).
`Compiled Work’
A version of the Work that has been processed into a form where it
is directly usable on a computer system. This processing may include
using installation facilities provided by the Work, transformations
of the Work, copying of components of the Work, or other
activities. Note that modification of any installation facilities
provided by the Work constitutes modification of the Work.
`Current Maintainer’
A person or persons nominated as such within the Work. If there is
no such explicit nomination then it is the `Copyright Holder’ under
any applicable law.
`Base Interpreter’
A program or process that is normally needed for running or
interpreting a part or the whole of the Work.
A Base Interpreter may
depend on external components but these are not considered part of
the Base Interpreter provided that each external component clearly
identifies itself whenever it is used interactively. Unless
explicitly specified when applying the license to the Work, the only
applicable Base Interpreter is a
`LaTeX-Format’ or in the case of files belonging to the
`LaTeX-format’ a program implementing the `TeX language’.

CONDITIONS ON DISTRIBUTION AND MODIFICATION
Activities other than distribution and/or modification of the Work
are not covered by this license; they are outside its scope. In
particular, the act of running the Work is not restricted and no
requirements are made concerning any offers of support for the
Work.
You may distribute a complete, unmodified copy of the Work as you
received it. Distribution of only part of the Work is considered
modification of the Work, and no right to distribute such a Derived
Work may be assumed under the terms of this clause.
You may distribute a Compiled Work that has been generated from a
complete, unmodified copy of the Work as distributed under Clause 2
above, as long as that Compiled Work is distributed in such a way
that the recipients may install the Compiled Work on their system
exactly as it would have been installed if they generated a Compiled
Work directly from the Work.
If you are the Current Maintainer of the Work, you may, without
restriction, modify the Work, thus creating a Derived Work. You may
also distribute the Derived Work without restriction, including
Compiled Works generated from the Derived Work. Derived Works
distributed in this manner by the Current Maintainer are considered
to be updated versions of the Work.
If you are not the Current Maintainer of the Work, you may modify
your copy of the Work, thus creating a Derived Work based on the
Work, and compile this Derived Work, thus creating a Compiled Work
based on the Derived Work.
If you are not the Current Maintainer of the Work, you may
distribute a Derived Work provided the following conditions are met
for every component of the Work unless that component clearly states
in the copyright notice that it is exempt from that condition. Only
the Current Maintainer is allowed to add such statements of
exemption to a component of the Work.
If a component of this Derived Work can be a direct replacement
for a component of the Work when that component is used with the
Base Interpreter, then, wherever this component of the Work
identifies itself to the user when used interactively with that
Base Interpreter, the replacement component of this Derived Work
clearly and unambiguously identifies itself as a modified version
of this component to the user when used interactively with that
Base Interpreter.
Every component of the Derived Work contains prominent notices
detailing the nature of the changes to that component, or a
prominent reference to another file that is distributed as part of
the Derived Work and that contains a complete and accurate log of
the changes.
No information in the Derived Work implies that any persons,
including (but not limited to) the authors of the original version
of the Work, provide any support, including (but not limited to)
the reporting and handling of errors, to recipients of the Derived
Work unless those persons have stated explicitly that they do
provide such support for the Derived Work.
You distribute at least one of the following with the Derived Work:
A complete, unmodified copy of the Work; if your distribution
of a modified component is made by offering access to copy the
modified component from a designated place, then offering
equivalent access to copy the Work from the same or some similar
place meets this condition, even though third parties are not
compelled to copy the Work along with the modified
component;
Information that is sufficient to obtain a complete,
unmodified copy of the Work.
If you are not the Current Maintainer of the Work, you may
distribute a Compiled Work generated from a Derived Work, as long as
the Derived Work is distributed to all recipients of the Compiled
Work, and as long as the conditions of Clause 6, above, are met
with regard to the Derived Work.
The conditions above are not intended to prohibit, and hence do
not apply to, the modification, by any method, of any component so
that it becomes identical to an updated version of that component of
the Work as it is distributed by the Current Maintainer under
Clause 4, above.
Distribution of the Work or any Derived Work in an alternative
format, where the Work or that Derived Work (in whole or in part) is
then produced by applying some process to that format, does not
relax or nullify any sections of this license as they pertain to the
results of applying that process.
A Derived Work may be distributed under a different license
provided that license itself honors the conditions listed in
Clause 6 above, in regard to the Work, though it does not
have to honor the rest of the conditions in this license.
If a Derived Work is distributed under a different license, that
Derived Work must provide sufficient documentation as part of
itself to allow each recipient of that Derived Work to honor the
restrictions in Clause 6 above, concerning changes from the
Work.
This license places no restrictions on works that are unrelated to
the Work, nor does this license place any restrictions on
aggregating such works with the Work by any means.
Nothing in this license is intended to, or may be used to, prevent
complete compliance by all parties with all applicable laws.
NO WARRANTY
There is no warranty for the Work. Except when otherwise stated in
writing, the Copyright Holder provides the Work `as is’, without
warranty of any kind, either expressed or implied, including, but not
limited to, the implied warranties of merchantability and fitness for
a particular purpose. The entire risk as to the quality and
performance of the Work is with you. Should the Work prove defective,
you assume the cost of all necessary servicing, repair, or correction.

In no event unless required by applicable law or agreed to in writing
will The Copyright Holder, or
any author named in the components of the Work, or any other party who
may distribute and/or modify the Work as permitted above, be liable to
you for damages, including any general, special, incidental or
consequential damages arising out of any use of the Work or out of
inability to use the Work (including, but not limited to, loss of
data, data being rendered inaccurate, or losses sustained by anyone as
a result of any failure of the Work to operate with any other
programs), even if the Copyright Holder or said author or said other
party has been advised of the possibility of such damages.

MAINTENANCE OF THE WORK
The Work has the status `author-maintained’ if the Copyright Holder
explicitly and prominently states near the primary copyright notice in
the Work that the Work can only be maintained by the Copyright Holder
or simply that it is `author-maintained’.

The Work has the status `maintained’ if there is a Current Maintainer
who has indicated in the Work that they are willing to receive error
reports for the Work (for example, by supplying a valid e-mail
address). It is not required for the Current Maintainer to acknowledge
or act upon these error reports.

The Work changes from status `maintained’ to `unmaintained’ if there
is no Current Maintainer, or the person stated to be Current
Maintainer of the work cannot be reached through the indicated means
of communication for a period of six months, and there are no other
significant signs of active maintenance.

You can become the Current Maintainer of the Work by agreement with
any existing Current Maintainer to take over this role.

If the Work is unmaintained, you can become the Current Maintainer of
the Work through the following steps:

Make a reasonable attempt to trace the Current Maintainer (and the
Copyright Holder, if the two differ) through the means of an
Internet or similar search.
If this search is successful, then enquire whether the Work is
still maintained.
If it is being maintained, then ask the Current Maintainer to
update their communication data within one month.
If the search is unsuccessful or no action to resume active
maintenance is taken by the Current Maintainer, then announce
within the pertinent community your intention to take over
maintenance. (If the Work is a LaTeX work, this could be done, for
example, by posting to comp.text.tex.)
If the Current Maintainer is reachable and agrees to pass
maintenance of the Work to you, then this takes effect immediately
upon announcement.
If the Current Maintainer is not reachable and the Copyright
Holder agrees that maintenance of the Work be passed to you, then
this takes effect immediately upon announcement.
If you make an `intention announcement’ as described in 2b. above
and after three months your intention is challenged neither by the
Current Maintainer nor by the Copyright Holder nor by other people,
then you may arrange for the Work to be changed so as to name you as
the (new) Current Maintainer.
If the previously unreachable Current Maintainer becomes reachable
once more within three months of a change completed under the terms
of 3b) or 4), then that Current Maintainer must become or remain the
Current Maintainer upon request provided they then update their
communication data within one month.
A change in the Current Maintainer does not, of itself, alter the fact
that the Work is distributed under the LPPL license.

If you become the Current Maintainer of the Work, you should
immediately provide, within the Work, a prominent and unambiguous
statement of your status as Current Maintainer. You should also
announce your new status to the same pertinent community as in 2b)
above.