I have complete a new version of the CF point observation Conventions at:

 https://cf-pcmdi.llnl.gov/trac/wiki/PointObservationConventions

Discussion is at:

 https://cf-pcmdi.llnl.gov/trac/ticket/37

I have incorporated various feedback from the past year, and made a preliminary implementation to be sure that a generic application can distinguish the various cases without human intervention.

I have tried to simplify, esp in the station profile and section feature types, where the combinations of options got too complex. The document is now explicit about all possible representations. The use of missing values is also clarified.

While the document is rather long, if you manage to wade through it you'll see that the patterns of use keep repeating and are mostly regular. Showing full examples I think is the best way to prevent misunderstandings.

I did make enough changes that anyone who wrote files using the previous version should check to see whats changed. Apologies for that.


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