Q as inheritor or aggregator? Re: Quantity - where does it fit?

[Brian Thomas]

On Friday 14 May 2004 07:59 am, David Berry wrote:
> > > My perception of the Q in the document is that it is a general purpose
> > > building brick which is intended to be used *inside* other models, as
> > > necessary, to hold and describe n-d arrays of homoegenous values for a
> > > single (possibly compound) phenomenon. Are you saying that your
> > > perception of the doc is that it suggests that other data models should
> > > be created as *sub-classes* of Quantity? If so, I think the doc should
> > > be changed to clarify this.
> >
> > Yes that is my perception!  If it's *not* the case then I shall breath a
> > partial sigh of relief.

	My perception is that it may be used either as a sub-class or in aggregation.

	It is the choice of the data-modeler to make(!) depending on their needs
	and design goals.

	=b.t.


-- 

  * Dr. Brian Thomas 

  * Dept of Astronomy/University of Maryland-College Park 
  * Code 630.1/Goddard Space Flight Center-NASA

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