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#95: Development of CF 1.5 Data Model
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  Reporter:  markh           |       Owner:  [email protected]
      Type:  task            |      Status:  new                          
  Priority:  medium          |   Milestone:                               
 Component:  cf-conventions  |     Version:                               
Resolution:                  |    Keywords:                               
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Comment (by markh):

 Replying to [comment:19 ngalbraith]:

 > Can we assume that when you use the term 'array' you include singletons?
 Or does that need to be stated explicitly?

 Do you differentiate between an array of size one and a singleton?

 I think that an array may always be of size one and that this ecplicitly
 allows singletons.

 We can state this explicitly if that helps.

 > Is the definition a little too specific?
 > ''
 > 'An auxiliary coordinate construct provides auxiliary information for
 interpreting the cells of an ordered list of one or more domain axes of
 the field.'
 > ''

 > The information in the aux coordinate isn't necessarily 'auxiliary' -
 only the construct is (i.e. as an alternative to a dimension coordinate).
 The aux coordinate doesn't need to be monotonic, and in some cases may not
 be ordered.
 >
 > Would a short version could be less ... limiting:
 > ''
 > 'An auxiliary coordinate construct provides information for interpreting
 one or more domain axes.'''

 I like this, and I agree that auxiliary part is how the Field interprets
 it, rather than a characteristic of the dcoordinate data.

 > Side note: We use aux coordinates to provide heights of meteorological
 sensors in files that may have subsurface data with a depth dimension. We
 may also use them for moorings that have a singleton lat/long dimension
 coordinate but also have GPS time series data.

-- 
Ticket URL: <https://cf-pcmdi.llnl.gov/trac/ticket/95#comment:22>
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