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RE: Evaluating an expression as an XPath expression
- From: Mark Feblowitz <mfeblowitz at frictionless dot com>
- To: "'xsl-list at lists dot mulberrytech dot com'" <xsl-list at lists dot mulberrytech dot com>
- Date: Sat, 22 Dec 2001 19:56:27 -0500
- Subject: RE: [xsl] Evaluating an expression as an XPath expression
- Reply-to: xsl-list at lists dot mulberrytech dot com
Yup - that did it!
And thanks. The different document contexts were something I never would
have gotten.
Mark
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Mark Feblowitz [t] 617.715.7231
Frictionless Commerce Incorporated [f] 617.495.0188
XML Architect [e]
mfeblowitz@frictionless.com
400 Technology Square, 9th Floor
Cambridge, MA 02139
www.frictionless.com
-----Original Message-----
From: Trevor Nash [mailto:tcn@melvaig.co.uk]
Sent: Saturday, December 22, 2001 9:58 AM
To: xsl-list@lists.mulberrytech.com
Subject: Re: [xsl] Evaluating an expression as an XPath expression
>In my real example (which didn't have the typo), I have multiple Expr
>elements that I must process. By converting the result to a string, don't I
>lose the ability to process it using a for-each? You said that I can
"switch
>it back by using a global variable to hold the root and another
>for-each", at what point do I convert to string?
>
If you have more than one node, then yes you need to convert to a
string within the for-each. You then need an inner for-each to switch
the context back, like this:
First a global variable
<xsl:variable name="root" select="/" />
Then modify your original attempt by inserting a for-each as indicated
by the >>>:
<xsl:for-each select="document(VC.xml')//Expr">
<xsl:variable name="expr">
<xsl:value-of select="."/>
</xsl:variable>
>>> <xsl:for-each select="$root">
>>> <!-- context is now the main input document -->
<xsl:if test="saxon:eval(saxon:expression($expr))">
<p>Found it: <xsl:value-of
select="$expr"/></p>
</xsl:if>
>>> </xsl:for-each>
</xsl:for-each>
Regards,
Trevor Nash
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