[Dev] Re: [commits] (capps) [8604] Update to architecture overview

[Katie Capps Parlante]

Andi Vajda wrote:
> 
> On Tue, 13 Dec 2005, John Anderson wrote:
> 
>> Under the description of Collections, you might want to mention that 
>> Collections can be made by combining two or more Collections with 
>> boolean operations.  Rather than saying collections use queries, you 
>> might say Collections can contain all the items of a Kind, or filter 
>> another Collection using a Python expression.
> 
> 
> Collections don't always contain all items of a kind, nor a filter thereof.
> That's just two examples.
> 
> A more appropriate statement would be to say that collections are based 
> off a Kind or off a ref collection and that collections can be combined 
> together using set arithmetic or filter expressions written in python.
> 
> Andi..

Good points. I completely rewrote that whole section sorta late last 
night, discussing the various types of Collection.

Cheers,
Katie