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Re: xpathDefaultNamespace attribute on xs:assertion
- From: Michael Kay <mike@saxonica.com>
- To: Mukul Gandhi <mukulg@softwarebytes.org>
- Date: Tue, 31 May 2022 12:45:14 +0100
 | I agree it's not very useful, because it's very unlikely that an assertion on a simple type will reference element names or type names, other than the built-in XSD atomic type names; but it's there for completeness. For example you can write
<xs:assertion xpathDefaultNamespace=" http://www.w3.org/2001/XMLSchema" test="$value castable as dateTime"/>
It's there for orthogonality. If there are lots of use cases for putting the attribute on xs:assert, but only a rather slender use case for putting it on xs:assertion, then it's better to put it on both for the sake of consistency.
Michael Kay Saxonica
Hi all,
Is an optional xs:annotation child of xs:assertion, can make use of xpathDefaultNamespace attribute on xs:assertion, or is there any other use case of having xpathDefaultNamespace attribute on xs:assertion?
It seems to me that, xs:annotation child of xs:assertion, cannot make use of xpathDefaultNamespace attribute, since there can never be XPath expressions to be evaluated within xs:annotation.
But my other question still begs for answer. i.e, whether xpathDefaultNamespace attribute has any valid uses with xs:assertion? As far as I know, xs:assertion always has to evaluate XPath expressions involving $value and literals. As per XSD 1.1 spec, $value is "a value consisting of a sequence of zero or more atomic values".
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