Hi @davidhassell 

you're welcome

> The text as you wrote it is indeed fine, but I'm not sure what the difference 
> between  coordinate_variable and coordinates_variable

I have introduced the `s` into `coordinates_variable` in the text to try and 
contrast, to state more explicitly that this word is different from the widely 
used `coordinate variable` concept, which is widespread in the conventions 
document.  I hope that this may help to avoid the interpretation that this is 
only for the `coordinate variable` concept but is trying to refer to any netCDF 
variable which may contain some coordinate values, be they auxiliary or not.

I'm not wedded to this change, and I think the doc is okay as it is now, but 
this change may just help to make a reader think 'is this a different concept, 
should I read this again carefully'.  As the information is contained within 
these two proximate sections in the conventions doc, I thought it might be a 
worthwhile editorial tweak.

mark

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