[dsdl-discuss] Re: First draft of Schematron spec (Schematronin one defun)

On Tue, 2003-07-15 at 16:22, Rick Jelliffe wrote:
> It is an attribute on the sch:schema element. There are reserved values currently.
> "xslt" is the default.
>
> I don't think it is useful to use URLs for this purpose. The only purpose of
> a URL is to promote frustration, as people type the wrong thing in, as far
> as I can see. Also, which URL should it be? The user would expect it
> to be the URL of the query language, but what it really needs to be is
> the URL of the query language binding.
>
> I tend to see this kind of binding as operating more positively than negatively:
> just as with RELAX NG datatype libraries, validators will implement one or two
> bindings and sophisticated users will make inhouse or custom-job bindings, so
> most of time the purpose of the identifier is just a filter to filter out uncommon bindings.

But isn't there a need to use several bindings in a single schema?
That's probably not the case if we keep the current list, but if we
introduced a Relax NG binding users may want to express some assertions
with XPath or XSLT and some others with Relax NG. Another example could
be a "regular expression" binding. It could make sense for some rules
but wouldn't be sufficient for a whole schema.

Eric

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