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   RE: [xml-dev] Identifying Data for Interchange [was: XML Components]

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It would be interesting to see other than 
word of mouth proofs for the assertion that 
hacking one's way into the solution is always 
better than up front design.  Listening to the
customer and then working with the customer 
to come to a design that satisfies both the 
limits of the current code base (eg, don't 
unnecessarily add data elements; don't take 
a code base that is satisfying multiple 
customers and specialize it to the viewpoint 
of one) and a factored and precise statement 
of what the customer wants, is more productive.  
You seem to say that in the next point but don't 
see the contradiction.

Extremes are the problem.  In my experience, 
over design or under design are the extremes. 
Standards are the art of compromise combined 
with just-in-time treachery.


From: Mike Champion [mailto:mc@xegesis.org]

Sure, but again see the XP people's rants on this subject: a lot more 
projects have failed because the developers put their effort into designing 
generalizeable, extensible abstractions up front than have failed because 
the code had to be refactored as requirements and technology changed.

> 3. Once you have identified good interchange data you then need to
> determine how to represent it.  There may be various ways to represent
> it.  However, you should pick precisely one, unambiguous representation
> for which there are algorithms to map to the other representations. This 
> becomes the "interchange standard".  Defining an interchange
> standard greatly reduces the complexity of all

Seems like a good principle, but also sounds like a political rathole 
because everyone wants the data to be in a form that they can easily 
produce or consume.  In a Technocracy where decisions are made on the basis 
of the Right Thing, this would be a very workable principle.  Someone tell 
me when they start to sell tickets on the starship heading for that planet.


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