[CF-metadata] What do models assume for the shape of the Earth?

[John Caron]

Jonathan Gregory wrote:

>>Having said that, one day they will (maybe as mesoscale models are at the km 
>>resolution now, they already are), so it's a great idea to be asking the 
>>question now. So it's not so much does the information get recorded, but if 
>>we did, where would we put it?
>>    
>>
>
>I'd say this kind of information is definitely in the category of metadata
>about the model, rather than describing/defining the model-generated data.
>It lies in the province of discovery metadata, GO-ESSP, etc. rather than CF.
>  
>
thats an interesting distinction, im not sure i understand, could you 
clarify how you understand the province of CF vs "discovery metadata" ?