Re: [xml-dev] What is the best way to approach the structuring ofinvento

[Michael Kay <mike@saxonica.com>]

 >However, as far I can see (I have not looked very hard), this 
vocabulary is for "per-item" information, not "summary" information such 
as "number of aircraft" (at an airport).

I think this is a classic example of how the data model doesn't lead 
directly to the message design. The data model will tell you that 
there's a relationship (or multiple relationships) between planes and 
airports; only the process model can tell you that in a particular 
message, what you need to include is data derived from this 
relationship, namely the number of aircraft due to land at the airport 
in the next hour.

Michael Kay
Saxonica