xml-dev - Re: Why namespaces?

[Len Bullard <cbullard@hiwaay.net>]

W. Eliot Kimber wrote:
> 
> This "view" idea in architectures is very similar to the
> concept of views in relational databases: it's an abstraction of a
> document expressed as another document, just as a database view is an
> abstraction over a set of tables expressed as another table or set of
> tables.

Excellent, Eliot.  You might want to take some time to 
review the concepts of OLAPs (online analytical processors) 
in conjunction with this synthesis of relational and hierarchical 
'views'.  The axes and coordinate concepts should look familiar 
to you.  Note the additions to SQL used to work with the 
n-dimensional cubes, and the fact that regular table 
structures and SQL can be used to get the same results.  
The issues of naming are also interesting.  It occurs 
to me that simple prefixing isn't sufficient because 
namespaces nest.

There is an extensive document on the Microsoft developers 
site about OLAP technology.

len


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