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- separate semantic definitions from application code
WSDL definitions (Operations, Messages, Parts, etc. are often dependent
on the systems that consume and process the messages whose format the
WSDL document describes - for example, "getLastTradePrice" may be the
name of an executable module on the receiver side (a Java Bean, C++
program, etc.). Does this violate the above principle? (in other words,
is the principle accurate?)
Booz | Allen | Hamilton
"Roger L. Costello" wrote:
> Hi Folks,
> Below are a few principles which I hold to be true:
> 1. Frequently, data endures but the applications which processes the
> data comes and goes.
> 2. Separate everything:
> - separate data from presentation
> - separate data from applications that process the data
> - separate semantic definitions from application code
> - separate hyperlink definitions from data (put hyperlink
> definitions in a linkbase)
> 2. Freedom is not "do anything you want". That is chaos. Unbridled XML
> leads to chaos. Freedom is brought about through discipline. Bring
> order to instance data by conforming to a design pattern.
> The RDF Class/Property/Value design pattern seems like a
> good choice to control the chaos.
> 3. Minimize exacting requirements on the *form* of instance documents.
> Expect diversity of expression.
> Corollary: In designing schemas apply liberal quantities
> of <any> and <all>; minimize use of <sequence>
> and minOccurs="1".
> 4. Take a step forward to machine understanding of instance data by
> documenting how the data relates to other things in the world: How does
> the class of data in the instance document relate to other classes of
> data? What are the characteristics of the properties? Answers to these
> questions constitute a logical model.
> OWL seems like a good choice for declaratively expressing
> logical models.
> I invite your suggestions for deletions/extensions/modifications to this
> list. /Roger
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org:Booz | Allen | Hamilton;IT Digital Strategies Team
adr:;;8283 Greensboro Drive;McLean;VA;22012;
fn:Joseph M. Chiusano