Bryan Tong Minh wrote:
I missed part of the discussion, but PD-XYZ tags
should only be used
if XYZ is the author. We don't want any PD-NARA disasters again.
Just a little remark:
I lately had discussions with content providers who could perhaps
release their content under a free licence, and I needed statistics on
Commons. Templates and categories are really helpful there, because one
can extract statistics from them through SQL queries.
For instance, after some SQL work, I was able to count the ratio of
articles on astronautics on Wikipedia in French that have PD-USGov
illustrations.
In contrast, textual explanations and other things that should be
reviewed by a human do not help.