Copyleft, GPL (was: FDL University-courses II)

Achim D. Brucker brucker at
Thu Jul 18 11:16:37 UTC 2002

[discussion about GPL beeing viral]
> > I' would happily adopted a better term describing this special GPL feature of 
> > protecting the freedom of software, spontaneous I would prefer sticky over 
> > persistent.
>  Copyleft: "Copyleft is a general method for making a program free software
>             and requiring all modified and extended versions of the program to
>             be free software as well."
>  (
not quite, as I unterstood the use of "viral", the LGPL is non-viral. But, as
always, re-reading the "GNU Licenses page" clariefies things a lot. In my 
experience, the use "viral" mostly describes the difference between 
a "strong Copyleft" (e.g. GNU GPL) and a "weak Copyleft"  (e.g. GNU LGPL). 

Therefore I will happily switch to the "strong" and "weak" Copyleft. 


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