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reading a document into a typed variable

Subject: reading a document into a typed variable
From: Georges Schmitz <georges.schmitz@xxxxxxxxx>
Date: Wed, 30 Sep 2009 17:37:18 +0200
 reading a document into a typed variable
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

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,

<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))"/>


<xsl:variable name="global.setup" as="document-node(element(global-setup))">
<xsl:when test="doc-available($global.setup.file)">
<xsl:copy-of select="document($global.setup.file)"/>
<xsl:copy-of select="trace($global.setup.file,'Configuration File $global.setup.file was not readable (missing or not valid)!')"/>
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