Re: How to access PSVI in XSLT3

Thanks, Mike for reply and thoughts.

On Thu, May 24, 2018 at 12:38 PM, Michael Kay mike@xxxxxxxxxxxx <
xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:

> Practically, no, because (a) there isn't going to be another XSLT
> specification in the foreseeable future, and (b) there wouldn't be enough
> implementors to justify a standard.
>
> Technically, schema validation is closely tied in with the XDM type
> system, and this has the consequence that XDM never exposes nodes for which
> validation has failed (that is to say, for which the outcome of validation
> is "invalid"). It would be possible to relax this, but it would need
> careful thought: it would involve a different kind of validation, in which
> (a) validation never causes a dynamic error, but (b) data that has been
> subjected to validation cannot be assumed to conform to the type against
> which it was validated.
>
> There is also an effect on streaming. XSD is designed so that you know,
> while processing a start tag, what the type of the element is supposed to
> be; but you don't know until you hit the end tag whether the element is
> actually valid against that type. This means that if invalid data is to be
> made visible to the application, then in a streaming environment the PSVI
> data for an element can't be exposed until you reach the end tag.
>
> Of course, there are applications for which it would be very useful to
> allow an invalid document to be processed and inspected, but it's probably
> a minority requirement.
>





-- 
Regards,
Mukul Gandhi