Here, I am suggeting a small (but probably useful) improvement to the
EDTF specification. What do you think about adding the following new
feature at #103 (or maybe #205)
which could for example be really useful to store the publication date for
a journal first issued in "spring 2008" and still publish four times a year
(spring, summer, fall and winter - in any order)? The BNF could be really
easily modified for that, just replacing
> L1Start = (date UASymbol?) | "unknown"
L1Start = ( ( date | season ) UASymbol?) | "unknown"