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Software Licenses
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Bruce Perens
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LGPL
The GNU Lesser General Public License (formerly the
GNU Library General Public License) - LGPL is a
free software
licensed devised by the
Free Software Foundation.
The
FSF recommends the use
of this license on some, but not all, software libraries, although the license
has been used by others both on libraries and on applications
(including the popular office software suite,
OpenOffice.org).
The principal difference between the LGPL and the
GPL is that
copyleft
restrictions in the LGPL apply to the program itself, but do
not apply to other software that merely links with the program,
thus allowing LGPL software to potentially be used with both
free software
and
proprietary software. Nevertheless,
there are still terms and conditions which apply to the usage of LGPL
software, and how it may be combined with other software.
Additionally, the LGPL also includes a special provision that allows
anyone to convert any LGPL software into
GPL software, which
thus allows the reuse of such software directly in
GPL projects.
The original version of the LGPL was released in
1991,
a revised version of the license was released in
1999,
and as with the
GPL version 3, a new version
is currently under development at the time of writing.
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