- From: Sean McGrath <sean.mcgrath@p...>
- To: xml-dev@l...
- Date: Fri, 12 Apr 2013 09:12:26 -0500
[John Cowan]
>What I must understand to do what I want with a document has
nothing to do with what you must
>understand to do what you want. And perhaps neither of us have
purposes that were foreseen by the publisher.
Amen. To paraphrase the Bard of Avon, structure is in the eye of the
beholder.
I had the good fortune early in my career to be exposed to Jackson
Structured Programming[1]. With Jackson, you create a *brand new
data model* every time to sit down to process some data. The data
model chosen as the input data structure is rarely the schema used
by the creator of the data. Rather, it is a supervenient data model
that can be mapped to the data, but it completely distinct from the
data. Not only is it not *in* the original data, its not even in the
local institutions view of the data. It is literally, problem
specific. A developer might have a dozen different input data
structures for the same data set for a dozen different applications.
Jackson goes on to take the same approach on the output-side, but
that's another story:-)
[1]
http://en.wikipedia.org/wiki/Jackson_structured_programming
--
Sean McGrath, CTO, Propylon Inc.
http://www.propylon.com
http://seanmcgrath.blogspot.com
@propylonsean
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