We looked at the excellent chart by Peter Hirtle that helps people, in an almost algorithmic manner, determine the copyright status of an item that they have in hand. From this, we extrapolated key data elements that would help someone make this assessment. Not in all of the detail that Peter includes, but most of it.
	Point out:
	“Life of author” i.e. when author died
	“Published vs unpublished works”
	“with and without copyright notice”