Subject: RE: [xsl] combining two variables to generate XPATH From: "Michael Kay" <michael.h.kay@xxxxxxxxxxxx> Date: Tue, 17 Dec 2002 21:54:45 -0000 |
> Is that FAQ outdated?? I know that the following code works > just fine: > > <xsl:template match="proc"> > <xsl:call-template name="foo"> > <xsl:with-param name="node" select="." /> > </xsl:call-template> > </xsl:template> > > <xsl:template name="foo"> > <xsl:param name="node"/> > <xsl:for-each select="$node/branch/leaf"> > <xsl:value-of select="@id" /> > </xsl:for-each> > </xsl:template> > > What is different about a path with a single variable, and a > path with two > variables? Why can't I specify a second variable: > > <xsl:template name="foo"> > <xsl:param name="node"/> > <xsl:param name="branch" select="'someBranch'"/> > <xsl:for-each select="$node/$branch/leaf"> > <xsl:value-of select="@id" /> > </xsl:for-each> > </xsl:template> > The first step in a path expression can be any expression that returns a node-set. The value of $node is a node-set. In XPath 2.0, subsequent steps can also be expressions that return a node-set. But they can't be expressions that return strings: the value of $branch is not a node-set, it is a string. XPath variables represent values, they aren't macros that represent parts of an expression. Michael Kay Software AG home: Michael.H.Kay@xxxxxxxxxxxx work: Michael.Kay@xxxxxxxxxxxxxx > > > >From: Mark Wilgus <mwilgus@xxxxxxxxx> > > > >I believe this is not possible. XSLT doesn't allow you > >to use a variable for an XPath expression. See number 2 at the > >following list: > > > >http://www.dpawson.co.uk/xsl/sect2/nono.html > > > > > -----Original Message----- > > > From: bix xslt [mailto:bix_xslt@xxxxxxxxxxx] > > > > > <xsl:variable name="branch" > > > >select="concat($node,'/',$type,'/item')" /> > > > > <xsl:value-of select="$branch" /> > > > ><!-- <xsl:for-each select="$branch"> > > > > > > > _________________________________________________________________ > Protect your PC - get McAfee.com VirusScan Online > http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963 > > > XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list > XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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