[CF-metadata] variables in separate files

[John Caron]

Jonathan Gregory wrote:

>Dear All
>
>Brian has remarked:
>
>"I don't think CF needs to address all possible ways that someone might
>choose to distribute data between files.  For example, we don't provide
>conventions to store coordinates in a separate file from the data
>variables."
>
FYI: NcML Dataset allows one to construct a "virtual dataset" from 
seperate netcdf files. Still in alpha test, Java-only for now.