Dear Till, I'm one of the maintainers of teTeX and TeXLive in the Debian/GNU Linux distribution[1]. While verifying the licenses of the components of TeXLive and teTeX, I found that the situation of beamer and pgf is somehow unclear.
Many of the files contain a header that states that they are under the LPPL. On the other hand, both manuals contain a section that says that the respective package is distributed under the GPL. However, the GPL statement does not say which files are included. One could suspect that the lists in FILES (latex-beamer-3.06/FILES or pgf-1.00/doc/pgf/FILES) indicate which files are covered, but they also include files with LPPL header. Which of that is true, or are some files dual-licensed? There are also some eps and jpeg files included which look as if they were not created by you (in particular the Apple Mac and TU logo images), and for all of them I wonder whether JPEG is actually the source, the "preferred form for modification". I would be much obliged if you could clarify this - either just by answering this e-mail, ideally also by stating the license more explicit in the next release. Regards, Frank [1] and a DANTE member, too; I heard your talk at the DANTE meeting in Berlin and since then am waiting for an opportunity to test TikZ, but only had to typeset formulae... -- Frank Küster Single Molecule Spectroscopy, Protein Folding @ Inst. f. Biochemie, Univ. Zürich Debian Developer (teTeX/TeXLive)
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