I'm creating a table of objects, including their year of manufacture.
In some cases the year of manufacture will be very precise, '1855',
say. In other cases the year will be much more vague - 'circa 1830',
'1780 - 1820' or even 'early 19th century'. Indeed, as the objects get
more ancient, I can well imagine that their ages become much less
precise. Just wondered if anyone had any suggestions about ways of
storing this kind of information.