[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: collection vs dataset EOD? Re: orthogonality (was Re: New attempt)



Quoting Ethan Davis <address@hidden>:

> Umm. Wasn't Joe saying that the difference in meaning between datasets and
> collections is that collections contain related objects and datasets
> contain
> alternate views of the dataset or subsets of the dataset?
> 
> To show that differnce, it seems like there would have to be a difference
> between <collection> elements and <dataset> elements. They would be
> identical
> except that <dataset> elements can contain <access> elements and
> <collection>
> elements cannot.
> 
>

Joe said that, but I was steering away from that interpretation of access
elements (as was John's last e-mail). In fact, there is no difference between
the two things:

1) collections contain related objects
2) datasets contain subsets of the dataset.

i.e. subsets of a dataset are related objects.

access elements within a particular dataset promise alternate delivery of that
complete dataset object.   datasets within a dataset promise part of that
dataset:  the relationship between (sub-)datasets and access objects of the
parent dataset is more-or-less the same relationship between (sub-datasets) and
parent datasets.   More to the point, you should not be talking about those
relationships -- you should be talking about relating access elements of
subdatasets to access elements of datasets.

In summary -- do not name access elements -- it just leads to confusion.

Benno

NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.