Dear Jonathan and John,

> > What does 9.1 actually mean by "monotonically increasing" 
> if the data
> > can be stored in non-monotonic order?
> 
> Ah yes, good point! Perhaps we should delete "with 
> monotonically increasing
> times" in Table 9.1, and also "ordered" in the 
> trajectoryProfile definition.

Does CF really need to support unordered elements *within* a single[1]
time series? e.g. Are there a significant number of real-time situations
where the data from a single stream need to be written out of order to a
CF file?

So somewhat contrary to my previous statement, my current thinking is
table 9.1 should keep the "monotonically" and "ordered" descriptions,
and these should be clarified by further rules stating their ordered
nature even when expressed as an aux coord var.

[1] It's clear how it can help to support unordered elements *across*
multiple time series - but that's taken care of by the indexed ragged
array representation (9.3.4).

Regards,

Richard Hattersley  AVD  Iris Technical Lead
Met Office  FitzRoy Road  Exeter  Devon  EX1 3PB  United Kingdom
Tel: +44 (0)1392 885702  Fax: +44 (0)1392 885681
Email: richard.hatters...@metoffice.gov.uk  Website:
www.metoffice.gov.uk
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