Subject: Re: [xsl] Variable: true or false From: David_N_Bertoni@xxxxxxxxx Date: Fri, 6 Apr 2001 22:06:26 -0700 |
Tom Gilbert wrote: > I do the transform on this XSL and get "true". I would have expected > "false". Thought the boolean of an empty object would always be false. > > Using Xerces 1.4 and Xalan 1.1 > > <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" > version="1.0"> > <xsl:variable name="selectUser"/> > <xsl:template match="/"> > <xsl:choose> > <xsl:when test="$selectUser"> > true > </xsl:when> > <xsl:otherwise> > false > </xsl:otherwise> > </xsl:choose> > </xsl:template> > </xsl:stylesheet> You are creating a result tree fragment, which always has a conceptual root node. Thus, the boolean value of a result tree fragment is always true. It know it seems strange, but there you have it! If you want to create a variable that contains a node-set, you have to use the select attribute. For example: <xsl:variable name=selectUser" select="/.."/> would return an empty node-set. For the gory details, you can see section 11.1 of the XSLT recommendation. Dave XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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