I don't understand the difference between two ways of loading
an XML file into a variable (see A and B below). Case A used
to work with old saxon 8.9, but with 9.2 only B is
successful. With A I get following error message:
XTTE0570: Required item type of value of variable $global.setup is
document-node(element(global-setup, xs:anyType)); supplied
value has item type xs:string
Saxon's type checking has improved between the two releases. Saxon 9.2
recognizes at compile time that if $global.setup.file is a string, then
trace($global-setup-file, x) will also be a string, and that this is
inconsistent with your declared type, which is document-node(). In earlier
releases this error would only have been detected at run-time, and only if
this branch of the if-then-else were selected. But Saxon's static
type-checking is not yet perfect: it seems it is failing to spot that if
trace($global-setup-file, x) is a string, then <xsl:copy-of
select="trace($global-setup-file, x)"/> will also be a string, and this is
why you get no compile-time error message for case B. I'll take a look at
this and try to improve it for the next release.
What you really want is to remove the error, of course, and to do that you
need to ensure that the exception branch of your conditional delivers a
result that is consistent with the type declaration of the variable.
Regards,
Michael Kay
http://www.saxonica.com/
http://twitter.com/michaelhkay
If I omit the type declaration in A, the rest of the
stylesheet is nevertheless working correctly. So at a certain
stage, what saxon sees as a xs:sting is converted into a tree.
It's OK with me if you just point me to the right
documentation to find out myself.
Thanks for clarification,
Georges
[A]
<xsl:param name="global.setup.file"
select="'../../xml-resolved/GlobalSetup-resolved.xml'"
as="xs:string"/> <xsl:variable name="global.setup" select="if
(doc-available($global.setup.file))
then
document($global.setup.file)
else
trace($global.setup.file,'Configuration File $global.setup.file was
not readable (missing or not valid)!')"
as="document-node(element(global-setup))"/>
[B]
<xsl:variable name="global.setup"
as="document-node(element(global-setup))">
<xsl:choose>
<xsl:when test="doc-available($global.setup.file)">
<xsl:copy-of select="document($global.setup.file)"/>
</xsl:when>
<xsl:otherwise>
<xsl:copy-of select="trace($global.setup.file,'Configuration
File $global.setup.file was not readable (missing or not
valid)!')"/>
</xsl:otherwise>
</xsl:choose>
</xsl:variable>
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