Draft for review: ISO 8601 date work on IS 29500

[MURATA Makoto (FAMILY Given)]

> 
> There is a stumbling block though: Because of the multi-purpose nature of cell values, 
>the date must go in an attribute of type string. Is it possible for us
>to have a string which, in certain circumstances, is a restriction of
>xsd:dateTime? It was our understanding that this couldn't be done, but
>neither of us are XML wizards so any thoughts much appreciated. 

You certainly can.  The pattern facet works here.

Cheers,
Makoto