[CF-metadata] CF compliance

[Jonathan Gregory]

----- Forwarded message from Derrick Snowden <Derrick.Snowden at noaa.gov> -----

> Analogously, what is required in order to claim that a data file is CF-1.0 
> compliant and what is recommended?

A file is compliant if it follows all the requirements of the CF conformance
document. Some of these are obligations and some prohibitions. They were
extracted from the CF standard document. The recommendations are also listed.

Jonathan