Hello CF community

I have been perusing the CF conventions again, particularly the section on 
Ancillary Data
http://cf-pcmdi.llnl.gov/documents/cf-conventions/1.6/ch03s04.html

The conventions make the statement:

  The nature of the relationship between variables associated via 
ancillary_variables must be determined by other attributes.

The example given provides data variables which reference the same dimensions 
in the file: thus they data arrays are the same size.  However, the conventions 
do not seem to mandate this.

I am interested in the use of the 
  ancillary_variables
attribute in real world datasets.

Do people have examples they can share of ancillary datasets which:

  a. reference the same file dimensions as the data variable with the 
ancillary_variables attribute references

  b. reference a subset of the file dimensions referenced by the data variable 
with the ancillary_variables attribute

  c. reference file dimensions which are not referenced by the data variable 
with the ancillary_variables attribute

I am particularly interested in examples of case c, as I feel this is markedly 
different from cases a and b and requires a different kind of support if it is 
in use.

many thanks
mark  
_______________________________________________
CF-metadata mailing list
CF-metadata@cgd.ucar.edu
http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata

Reply via email to