Matthew Dovey wrote:

> So we have 1 vote
> for xsd:dateTime and 1 vote for xsd:duration. What do the others think?

Duration.

Look at:
http://www.loc.gov/z3950/agency/zing/srw.html
Result Sets. It says:
In each Search/Retrieve  response the server may include a result set idle
time value indicating a projected (not guaranteed) length of  time that the
result set will remain available if it is not referenced. Once the result
set is referenced in a subsequent Search/Retrieve request, that response may
include a new value for the result set idle time.

We spent alot of time talking about this in July, and I thought it was
fairly-well agreed.

--Ray