From: Edward C. Zimmermann > No. There are not multiple ways to interpret an interval. We are, I > think, > all quite clear what closed intervals are: a continuum of points > between two > discrete (end)points. So, If the interval start and end point have "seconds" precision, then the points in this continuum are seconds. For the interval 2000-01-01/2000-09-09 the points in the continuum are the days. For the interval 2000-01/2000-09 the points in the continuum are the months. For the interval 2000/2009 the points in the continuum are the years. Right? Here is where I'm confused. We have tentatively agreed that we do not need the start and end to have equal precision. So, for 2000/2009-10 What are the points in the continuum? --Ray