On Fri, 2022-05-06 at 16:27 +0000, Michael Kay mike@xxxxxxxxxxxx wrote:
> If you can express the condition with an @as attribute, use that in
> preference to an xsl:assert, because it's much more amenable to
> static analysisB
This is a good reason; another is that programming errors in assert
expressions are much less likely to be caught than mistakes in as=
For example,
> >
> > <xsl:param name="item" as="element(author)"/>
> >
> > is equivalent to:
> >
> > <xsl:param name="item"/>
> > <xsl:assert test="name($item) eq 'author'"/>
except of course, as Mike Kay pointed out, it isn't - not only for the
reasons he gave, but also because when you use as="element(author)",
every single use of that parameter will be tested automatically, so
<xsl:sequence select="$item + 6" />
can raise a static error.
--
Liam Quin,B https://www.delightfulcomputing.com/
Available for XML/Document/Information Architecture/XSLT/
XSL/XQuery/Web/Text Processing/A11Y training, work & consulting.
Barefoot Web-slave, antique illustrations: B http://www.fromoldbooks.org
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