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Sat Apr 23 2005
This files attempts to clarify the licensing situation for the SANE
distribution. In case of doubt, the copyright information contained
in each file overrides what is said here.
SANE consists of three parts each of which has its own licensing
terms:
* The frontend programs.
These programs are generally protected by the GNU General Public
License. (See file COPYING.)
* The backend libraries.
Most backend libraries are protected by the GNU General Public License
(see file COPYING), but as an exception, it is permissible to link against
such a library without affecting the licensing status of the program
that uses the libraries. For details, see the copyright notice at the
head of the backend files (e.g., backend/dll.c).
Note that not all of the backends apply the exception and that some have
additional licensing constraints. E.g., the DC210 backend uses JPG code
that is licensed as described in README.djpeg.
* The SANE API and network protocol as put forth in the standard document.
The standard is considered to be in the public domain. Anyone is free
to implement SANE interface conforming applications or libraries in
any way he or she sees fit.
Frequently Asked Questions about the SANE licensing:
* Why don't you use the GNU LPGL ?
The reason SANE isn't licensed under the GNU LGPL is very simple: the
GNU LGPL didn't exist at the time SANE was first released. So, the SANE
Exception was added to the GNU GPL.
* Why don't you relicense SANE, now that the GNU LGPL is available ?
To relicense the various pieces of code composing SANE, each and every
copyright holder needs to agree with the relicensing. Unfortunately, some
of the (original) backend authors cannot be contacted any longer, for
various reasons; not to mention each and every contributor who sent in a
patch. This effectively makes it impossible for the SANE Project to
relicense SANE.
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