Draft for review: ISO 8601 date work on IS 29500

[rjelliffe at allette.com.au]

> Hi all - Gareth and I think we have got something to the point where it
> can be reviewed by WG4. However - this is an early draft. The main areas
> of interest should be, I think, the line items in "introduction". That
> summarises the work that we've tried to effect in this draft.

I think it would be useful to

1) confirm that the 8601 date-time subset being used is also a subset of
W3C XML Schemas dateTime  datatype, and then, if it is

2) express the date constraints in 18.17.4 in terms of W3C XML Schemas
rather than ISO 8601. (Some subset might still be required.)

If the date format allows things not in XSD dateTime, it will not play
well in the general XML ecosystem, which goes against the point. XSD
Datatypes is more available to developers, and it in turn references ISO
8601.

Cheers
Rick