Subject: RE: RE: [xsl] XPath expression confusion|
Date: Thu, 12 Jan 2006 19:47:18 -0500
Thanks. -- Charles Knell cknell@xxxxxxxxxx - email
-----Original Message----- From: Xia Li <xli@xxxxxxxxxxxxx> Sent: Thu, 12 Jan 2006 15:39:58 -0800 To: <xsl-list@xxxxxxxxxxxxxxxxxxxxxx> Subject: RE: [xsl] XPath expression confusion
<xsl:when test="not(/system/components/component/requirement/@number .)"> <requirement><xsl:value-of select="." /></requirement> </xsl:when?
That means if there exists an item in the sequence selected by "/system/components/component/requirement/@number" that is not equal to the current value of <number> in the iteration, the condition is always true. That is why you output all the value of <number> elements.
File A ------- <requirements> <requirement> <number /> <requirement> <number /> And so on to an arbitrary depth </requirement> </requirement> </requirements>
File B ------- <system> <components> <component> <requirement number="" /> <requirement number="" /> <requirement number="" /> </component> </components> </system>
There will be an arbitrary number of components, each with an arbitrary number of requirements.
My goal is to produce a document containing all the requirement/number elements from File A that don't have a matching requirement/@number in File B.
<xsl:variable name="all-reqs" select="document('requirements.xml')/requirements//requirement/number" />
<xsl:template match="/"> <un-assigned-reqs> <xsl:for-each select="$all-reqs"> <xsl:choose> <xsl:when test="/system/components/component/requirement/@number = ." /> <xsl:otherwise> <requirement><xsl:value-of select="." /></requirement> </xsl:otherwise> </xsl:choose> </xsl:for-each> </un-assigned-reqs> </xsl:template>
It was my belief that the XPath expression in the test would search all the number attribute values in the document for a value that matched the value of the current iteration of the loop. Instead, it seems that there are no matches, as I get one element output for each iteration of the loop.
-- Charles Knell cknell@xxxxxxxxxx - email