[xquery-talk] Re: about "module" in XQuery spec

[he harrison]

I mean, the reason why implementation will throw an error is not due to
consistency constraints violation, but due to
not providing subtype substitution for static unknown schema type(spec.
allow this). If implementation does provide
subtype substitution for static unknown schema type, the answer will be
"false".

According to Jonathan Robie's opinion, the "redefine" here did not violate
the consistency constraints.
(whether I misunderstand Jonathan's word needs his confirmation)

2008/1/14, Michael Kay <mike at saxonica.com>:
>
>  Then according to module's "independently undergo the static analysis
> phase"
> definition, the answer will be "false" if implementation provide mechanism
> to dynamically detect static unknow type(in order to fully support subtype
> substitution),
> and will throw an error if implementation did not provide such mechanism,
> right?
>
>
> The specification doesn't say that implementations are obliged to throw an
> error if the consistency constraints are violated. It says that the results
> are undefined in these circumstances.
>
> Michael Kay
> http://www.saxonica.com/
>
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