"Additional files" in BioMed Central journals are normally released as
"Open Data" [0]. Once it is marked as "Open Data", you get a lot of
freedom; the data is then:

"freely available on the public internet permitting any user to
download, copy, analyse, re-process, pass them to software or use them
for any other purpose without financial, legal, or technical barriers
other than those inseparable from gaining access to the internet itself"

That is not as strong as, for example, a CCZero waiver, nor does it
address anything about liability. (E.g. did the paper authors have the
right to give you those rights?)

Egon

0.http://blogs.biomedcentral.com/bmcblog/2011/03/21/dear-scientist-help-us-=
to-put-open-principles-into-practice/

--=20
Dr E.L. Willighagen
Postdoctoral Researcher
Department of Bioinformatics - BiGCaT
Maastricht University (http://www.bigcat.unimaas.nl/)
Homepage: http://egonw.github.com/
LinkedIn: http://se.linkedin.com/in/egonw
Blog: http://chem-bla-ics.blogspot.com/
PubList: http://www.citeulike.org/user/egonw/tag/papers