The choices we are considering are:
1. Single timestamp attribute using ISO 8601
2. Single timestamp attribute using custom format designed for searching,
sorting, and parsing efficiency.
3. Timestamp info broken up into multiple attributes (year, month, date,
hour, minute, second, milliseconds, nanoseconds.
4. Timestamp info broken up into two or three attributes (year/month/date,
hour/minute/second, etc.) with the possibility of using ISO 8601.
A related side issue is whether to require global time or allow local time
as well.
It is interesting to note that the recently released DCD spec uses ISO 8601
subset (whatever that means).
Don Park