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RE: [xsl] Dynamic XPath
Subject: RE: [xsl] Dynamic XPath From: "Michael Kay" <mhk@xxxxxxxxx> Date: Fri, 23 May 2003 18:54:52 +0100 |
Some products, for example Saxon and Xalan, have an extension xx:evaluate() to do dynamic XPath evaluation, but MSXML doesn't. Michael Kay > Or to be more obvious: > <xsl:variable > name="dynamicPath">/document/section/keep/pear</xsl:variable> > Basically I want to be able to change the path from one node > to another, for example > <xsl:variable name="dynamicPath"><xsl:copy-of > select="//configuration/searchPath" /></xsl:variable> > > Which then changes the result of <xsl:variable name="textContent" > select="{$dynamicPath}/text()" /> > > i.e. I want the parser to process the {$dynamicPath} and > replace it with a literal string and then excute the search, in effect > <xsl:variable name="textContent" > select="/document/section/keep/pear/text()" /> > > -----Original Message----- > From: owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx > [mailto:owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx] On Behalf Of > G. Ken Holman > Sent: 23 May 2003 15:19 > To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx > Subject: Re: [xsl] Dynamic XPath > > > At 2003-05-23 15:08 +0100, Philip Fitzsimons wrote: > >What I would like to do is: > > <!--<xsl:variable name="dynamicPath" > >select="/document/*[position() = 2]" />--> > > <xsl:variable name="dynamicPath" > >select="/document/section/keep/pear" /> > > <xsl:variable name="textContent" > >select="{$dynamicPath}/text()" /> > > You are not showing what I would call "a dynamic XPath". Consider: > > <xsl:variable name="dynamicPath" > select="/document/section/keep/pear" /> > <xsl:variable name="textContent" > select="$dynamicPath/text()" /> > > I've modified the second instruction above, such that the > node-set variable > named $dynamicPath, which includes the nodes selected by your XPath > expression in the first insturction, is used to address all > the text nodes > from each. > > It is very acceptable to begin an XPath expression with a > reference to a > node-set variable. > > What did you mean by "dynamic"? > > ................. Ken > > -- > Upcoming hands-on courses: (registration still open!) > - (XSLT/XPath and/or XSL-FO) North America: June 16-20, 2003 > > G. Ken Holman mailto:gkholman@xxxxxxxxxxxxxxxxxxxx > Crane Softwrights Ltd. http://www.CraneSoftwrights.com/s/ > Box 266, Kars, Ontario CANADA K0A-2E0 +1(613)489-0999 (F:-0995) > ISBN 0-13-065196-6 Definitive XSLT and XPath > ISBN 0-13-140374-5 Definitive XSL-FO > ISBN 1-894049-08-X Practical Transformation Using XSLT and XPath > ISBN 1-894049-11-X Practical Formatting Using XSL-FO > Member of the XML Guild of Practitioners: http://XMLGuild.info > Male Breast Cancer Awareness http://www.CraneSoftwrights.com/s/bc > > > XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list > > > 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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