Re: Implementation details for date:date-time ()

Colin Paul Adams wrote:
> The implementation page doesn't define the meaning of "now".
> I.e. should this function return a different date-time every time it
> is called, or should it always return the same time throughout a
> transformation, as in XPath 2.0?
> If the latter is acceptable, then presumably I can reuse my code for
> implementing fn:current-dateTime unchanged?

If referential transparency is not explicitly required by the function,
then assume it is implementation dependent.

EXSLT functions/elements in general have different versions with different 
behaviors, but you can't refer to specific versions in a function call. So it 
is possible that your implementation will change which version of a particular 
EXSLT function or element definition it supports, and then the answer could
very well be "no, you can't reuse your code unchanged".