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Agreed, but XSD on its own in my experience at least, is not sufficiently expressive. Fraser. On 09/04/2013, John Cowan <johnwcowan@g...> wrote: > On Tue, Apr 9, 2013 at 3:06 PM, Fraser Goffin <goffinf@g...> wrote: > > >> Hallelujah something we can agree on. The business application should >> always be the repository of business rules and validation is one >> aspect of that. I only consider XSD useful as an optimisation so that >> you don't consume cycles only to find something that you could have >> discovered at the front door. > > > When you publish a set of documents, publishing the schema to which you > claim they conform is very useful for everyone. For one thing, it's > concrete, testable documentation about what to expect from you. This is > the opposite of the "normal" use of schemas as input validation: here they > are serving as *output* validation as well as documentation. > > > -- > GMail doesn't have rotating .sigs, but you can see mine at > http://www.ccil.org/~cowan/signatures >
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