Subject: Re: [xsl] Request help in understanding: node instance of schema-element(node) From: Eliot Kimber <ekimber@xxxxxxxxxxxx> Date: Mon, 28 Jan 2008 12:14:59 -0600 |
At 05:28 AM 1/27/2008, Mike wrote:To be honest, even though Saxon does use xsi:schemaLocation for the limited
purpose of locating a schema once validation has been requested, I don't
think it's a good idea to use it. If you are validating a document then
that's probably because you don't trust it, and if you don't trust it, then
why should you trust its schemaLocation attribute?
I agree with the conclusion here. The reasoning, however, does open a deeper set of issues.
In my experience, schemas (of whatever variety) have been used for two purposes, which have historically been joined at the hip, but which are actually quite distinct.
One is "validation", which is to say, determine whether a document or parts of a document conform to an expected or required type. ("Schema as gauge.")
The other is for type annotation or even for binding of XML data (which natively takes the form of sequences of characters) to data types. ("Schema as jig.")
-- Eliot Kimber Senior Solutions Architect "Bringing Strategy, Content, and Technology Together" Main: 610.631.6770 www.reallysi.com www.rsuitecms.com
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