So what is metadata anyway?
“Our feeling is that at this point “metadata” as a
descriptive term has become so debased by overuse
(and means so many different things in different communities and contexts) that is now virtually meaningless without extensive qualification; unfortunately, it has also become a very fashionable term.”
“The Nature of the NIDR Challenge”
http://www.cni.org/projects/nidr/www/chapter-1.html