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#74: Allow sharing of ancillary variables among multiple data variables
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  Reporter:  [email protected]  |       Owner:  
[email protected]             
      Type:  enhancement               |      Status:  new                      
                 
  Priority:  medium                    |   Milestone:                           
                 
 Component:  cf-conventions            |     Version:                           
                 
Resolution:                            |    Keywords:  "ancillary data" 
"standard name modifiers"
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Comment (by ngalbraith):

 I agree with Martin - 'sea_water_potential_temperature' could easily have
 an ancillary variable called 'sea_water_temperature
 number_of_observations.' (I'd tend to name these after observed variables
 and carry them over to calculated ones, but that should be left to the
 data writer.)

 If we wanted to require that the NOBS variable name included the 'target'
 data variable name (e.g. sea_water_potential_temperature had to have a
 NOBS ancillary variable called 'sea_water_potential_temperature
 number_of_observations' or 'sea_water_temperature
 sea_water_potential_temperature number_of_observations' we wouldn't need
 to bother with the ancillary variable attribute at all.

 I'm in favor of exploiting the flexibility this attribute gives us.

-- 
Ticket URL: <https://cf-pcmdi.llnl.gov/trac/ticket/74#comment:11>
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