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[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] A problem using the xsl:key facility
 I am struggling with the use of an xsl:key in a particular construct. I can't seem to get the xsl:key to work from within an xsl:for-each loop. The key is defined outside of any template, and the for-each is within a template. The key works fine outside of the for-each. Do I misunderstand something fundamental about the scope of a key? I please see below for the XSLT, and the input and output files. I am using Oxygen and Saxon-B 9.1.0.7 Thanks in advance! Sincerely, Nathan ###################### XSL Transform: <?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
exclude-result-prefixes="xs"
version="2.0"><xsl:output method='xml' encoding='UTF-8' indent='yes'/> <xsl:key name="service-by-name" match="//service" use="@name"/>
<xsl:template match="service" /> <xsl:template match="serviceName" /> <xsl:template match="text()" /> <xsl:template match="dataset"> <!-- Gather the serviceName's --> <xsl:variable name="serviceNames" > <xsl:if test="@serviceName"> <xsl:element name="serviceName"><xsl:value-of select="@serviceName"/></xsl:element> </xsl:if> <xsl:copy-of select="serviceName | metadata/serviceName"/> </xsl:variable> <xsl:choose>
<xsl:when test="boolean(dataset)">
<xsl:element name="NestedDataset">
<xsl:attribute name="name">
<xsl:value-of select="@name"/>
</xsl:attribute>
<xsl:apply-templates/>
</xsl:element> </xsl:when>
<xsl:otherwise>
<xsl:element name="dataset">
<xsl:attribute name="name">
<xsl:value-of select="@name"/>
</xsl:attribute> <xsl:element name="myServiceNames">
<xsl:copy-of select="$serviceNames"/>
</xsl:element><TheForEachLoopOutputIsInHere> <xsl:for-each select="$serviceNames/serviceName" > <xsl:variable name="sName"><xsl:value-of select="."/></xsl:variable> <xsl:comment> Sanity Check #1: Copy the current node. </xsl:comment> <xsl:element name="copy- of_current_serviceName_element"><xsl:copy-of select="."/></xsl:element> <xsl:comment> Sanity Check #2: Enshrine the string value of the variable sName in a new element. </xsl:comment> <xsl:element name="value- of_sName_variable"><xsl:value-of select="$sName"/></xsl:element> <xsl:comment> Sanity Check #3: Use the key "service-by- name" to retrieve the service element identified by the sName variable. This always fails within the xsl:for-each loop. </xsl:comment> <xsl:element name="copy-of_service_element"> <xsl:attribute name="name"><xsl:value-of select="$sName"/></xsl:attribute> <xsl:copy-of select="key('service-by-name', $sName)"/> </xsl:element> <!-- <xsl:element name="aservice"><xsl:copy-of select="."/></xsl:element> --> </xsl:for-each> </TheForEachLoopOutputIsInHere> <xsl:comment> Sanity Check #4: Outside of the xsl:for-each loop we can get things from the key "service-by-name". Here I'll just get a copy of the service called "wcs". </xsl:comment> <xsl:copy-of select="key('service-by-name','wcs')"/> </xsl:element>
</xsl:template> </xsl:stylesheet> ###################### XML Input: <?xml version="1.0" encoding="UTF-8"?> <catalog> <service name="woo" serviceType="OPENDAP" base="/opendap/hyrax1/" /> <service name="hoo" serviceType="OPENDAP" base="/opendap/hyrax2/" /> <service name="boo" serviceType="OPENDAP" base="/opendap/hyrax3/" /> <service name="all" serviceType="Compound" base=""> <service name="ncdods" serviceType="OPENDAP" base="/thredds/ dodsC/" /> <service name="wcs" serviceType="WCS" base="/thredds/wcs/" /> <service name="wms" serviceType="WMS" base="/thredds/wms/" /> </service> <dataset name="Dataset 0"> <dataset name="dataset1" serviceName="wcs" urlPath="satellite/ PH/ssta/1day"> <serviceName>all</serviceName> </dataset> </dataset> </catalog> ###################### XML Output: <?xml version="1.0" encoding="UTF-8"?> <catalog> <NestedDataset name="Dataset 0"> <dataset name="dataset1"> <myServiceNames> <serviceName>wcs</serviceName> <serviceName>all</serviceName> </myServiceNames> <TheForEachLoopOutputIsInHere><!-- Sanity Check #1: Copy the current node. --><copy-of_current_serviceName_element> <serviceName>wcs</serviceName> </copy-of_current_serviceName_element> <!-- Sanity Check #2: Enshrine the string value of the variable sName in a new element. --><value-of_sName_variable>wcs</value- of_sName_variable> <!-- Sanity Check #3: Use the key "service-by- name" to retrieve the service element identified by the sName variable. This always fails within the xsl:for-each loop. --><copy-of_service_element name="wcs"/> <!-- Sanity Check #1: Copy the current node. --><copy-of_current_serviceName_element> <serviceName>all</serviceName> </copy-of_current_serviceName_element> <!-- Sanity Check #2: Enshrine the string value of the variable sName in a new element. --><value-of_sName_variable>all</value- of_sName_variable> <!-- Sanity Check #3: Use the key "service-by- name" to retrieve the service element identified by the sName variable. This always fails within the xsl:for-each loop. --><copy-of_service_element name="all"/> </TheForEachLoopOutputIsInHere> <!-- Sanity Check #4: Outside of the xsl:for-each loop we can get things from the key "service-by-name". Here I'll just get a copy of the service called "wcs". --><service name="wcs" serviceType="WCS" base="/ thredds/wcs/"/> </dataset> </NestedDataset> </catalog>
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