On May 12, 2004, at 12:26 PM, Karen Coyle wrote:

> Bruce, the numbering that you refer to that I sent in before is
> probably
> the numbering used in the SICI (NISO Z39.56). It assigns:
> 21=spring
> 22=summer
> 23=fall
> 24=winter
> and
> 31=1st Q
> 32=2nd Q
> 33=3rd Q
> 34=4th Q
> The same numbering for [seasons] is used in the MARC holdings format.

Yes, that's it.  So this suggests it might be valuable to allow
something like:

        <dateIssued encoding="niso">2002-24</dateIssued>


PS - I just used "niso" as the encoding value for illustration.