On Feb 25, 2006, at 8:15 PM, Ron Schmelzer wrote:

> So, can you ever truly be "decoupled"?

IMHO, true decoupling is reached when the only semantics the consumer  
needs to know to use a given service are those that it takes to  
understand the task in general (regardless of which service).
IOW, in order to order a pizza you need to understand the basics of  
ordering and what it is that you want to order (pizza).

This knowledge, a uniform API and the ability of the service to show  
the path through the application at runtime should be sufficient to  
substitute the service by any other. Ah - you also need a way for the  
service to tell the client that it's expectation (order pizza) cannot  
be met (should that be the case).

Jan

________________________________________________________________________ 
_______________
Jan Algermissen, Consultant & Programmer                         
http://jalgermissen.com
Tugboat Consulting, 'Applying Web technology to enterprise IT'   
http://www.tugboat.de








 
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