Going with "1940~/1949~" would work at a pinch but as you say it isn't 'correct' in that you can't
determine if the item _covers_ 1940-1949 or was made _some time between_ those dates.
So +1 for allowing ~ and ? on decade and century precision dates.
On Fri, 8 Jan 2016 13:01:47 -0600, Hannah Tarver <[log in to unmask]> wrote:
>I believe I asked about approximate decades a couple of years ago and,
>at the time, the closest appropriate fit was an interval with
>approximate start/end dates, e.g., "1940~/1949~" for "ca. 1940s." We
>have been using this notation for our items, since dates of varying
>approximations happen quite frequently with cultural heritage items.
>However, if it is an option, I would support a specific notation to
>express an approximate decade to help distinguish between "a particular
>date in this approximate decade" versus "a range of time with
>approximate start/end dates."