Re: [xml-dev] Constitutionally incapable (was Re: [xml-dev] W3C Schema: Resistance is Futile, says Don Box)

From
John Cowan <>
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Date
2002-06-07T15:35:48Z
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Re: [xml-dev] Constitutionally incapable (was Re: [xml-dev] W3C Schema: Resistance is Futile, says Don Box)
Henry S. Thompson scripsit:

> 1) There is no way to say in RNG "this schema must be
> deterministic", so there's no way for a normative requirement that you 
> use schemas capable of reliable type assertions to be stated.

It's a work in progress.  Makoto and Kohsuke and others are thinking about
exactly what works and what doesn't.

> 2) There is no notion in RNG of identifying the types that were
> assigned, reliably or not -- indeed the notion of type assignment
> doesn't occur in RNG.  As you and many others so eloquently and
> repeatedly point out, RNG validation delivers a 1-bit result: valid or 
> not, nothing else.

Validation is validation, type inference is type inference.  As I posted
a moment ago, someone could write an RNG-based type inferencer for simple
types today (maybe even make it output the input, decorated with xsi:type
attributes?).

> Certainly a possiblity -- should SOAP wait until you or someone else
> works that out?

Why not?

-- 
John Cowan <>     http://www.reutershealth.com
I amar prestar aen, han mathon ne nen,    http://www.ccil.org/~cowan
han mathon ne chae, a han noston ne 'wilith.  --Galadriel, _LOTR:FOTR_