RE: [xsl] logical query - trying to be true if attribute value is "".

["Michael Kay" <mhk@xxxxxxxxx>]

Your stylesheet works correctly for me: what XSLT processor are you using?

Michael Kay 

> -----Original Message-----
> From: David Buddrige [mailto:dbuddrige@xxxxxxxxx] 
> Sent: 08 April 2004 04:34
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: [xsl] logical query - trying to be true if attribute 
> value is "".
> 
> Hi all,
> 
> I have an xml file called "Schedule.xml" with the
> following contents:
> 
> <?xml version="1.0" encoding="iso-8859-1"?>
> <project-import>
> <scope ID="1" Name="CDI Support"  />
> <scope ID="2" Name="ABC" Predecessors="" />
> <scope ID="3" Name="Online Viewing" Predecessors="" />
> <scope ID="4" Name="PROJ4322" Notes="" Predecessors=""
> Unique_ID_Successors="9"  />
> <scope ID="5" Name="Resolve View and markup" Notes=""
> Predecessors="4" Unique_ID_Successors="10"  />
> <scope ID="6" Name="Create inport script" Notes=""
> Predecessors="5"  />
> <scope ID="7" Name="NBU" Predecessors="" />
> <scope ID="8" Name="WA5422" Predecessors="" />
> <scope ID="9" Name="Modifications" Predecessors="" />
> <scope ID="10" Name="WA054334" Predecessors="" />
> <scope ID="11" Name="ongoing development"
> Predecessors="" />
> <scope ID="12" Name="V 3.2 Upgrade" Predecessors="" />
> <scope ID="13" Name="WA043422" Predecessors="" />
> <scope ID="14" Name="determine scope" Notes=""
> Predecessors="" Unique_ID_Successors="14"  />
> <scope ID="15" Name="setup test lab" Notes=""
> Predecessors="14" Unique_ID_Successors="17"  />
> <scope ID="16" Name="perform tests" Notes=""
> Predecessors="15" Unique_ID_Successors="18"  />
> <scope ID="17" Name="resolve test issues" Notes=""
> Predecessors="16"  />
> <scope ID="18" Name="re test" Notes="" Predecessors=""
> Unique_ID_Successors="15"  />
> <scope ID="19" Name="oracle upgrade" Notes=""
> Predecessors="18" Unique_ID_Successors="16"  />
> <scope ID="20" Name="gen upgrade" Notes=""
> Predecessors="19" Unique_ID_Successors="23"  />
> <scope ID="21" Name="Upgrade Close out" Notes=""
> Predecessors="20"  />
> <scope ID="22" Name="Receive client" Predecessors=""
> />
> <scope ID="23" Name="install and test new client"
> Notes="" Predecessors="" Unique_ID_Successors="28"  />
> <scope ID="24" Name="Remedial work resulting from
> tests" Notes="" Predecessors="23"
> Unique_ID_Successors="27"  />
> <scope ID="25" Name="Do Install" Notes=""
> Predecessors="24"  />
> <scope ID="26" Name="Update install scripts" Notes=""
> Predecessors="" Unique_ID_Successors="32"  />
> <scope ID="27" Name="Final Preparation" Notes=""
> Predecessors="26" Unique_ID_Successors="31"  />
> <scope ID="28" Name="Go live" Notes=""
> Predecessors="27"  />
> <scope ID="29" Name="Maintenance" Predecessors="" />
> <scope ID="30" Name="Task 43342" Predecessors="" />
> <scope ID="31" Name="Ongoing maintenance"
> Predecessors="" />
> </project-import>
> 
> I want to convert this xml such that the ID tag
> becomes id, the Name tag becomes "scope_name", Notes
> becomes "scope_description", and Predecessors becomes
> "parent_id".
> 
> Furthermore - and this is my problem - if the
> "Predecessors" attribute is "", then I want the
> corresponding parent_id attribute to be set to 1.
> 
> The xslt template that I have written to [attempt to]
> do this transformation follows:
> 
> <?xml version="1.0" encoding="iso-8859-1"?>
> <xsl:stylesheet version="1.0"
> xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
> 	<xsl:output method="xml" indent="yes"/>
> 	<xsl:template match="/">
> 		<wms>
> 		<xsl:apply-templates/>
> 		</wms>
> 	</xsl:template>
> 	<xsl:template match="scope">
> 	<xsl:element name="scope">
> 		<xsl:attribute name="id"><xsl:value-of
> select="@ID"/></xsl:attribute>
> 		<xsl:attribute name="scope_name"><xsl:value-of
> select="@Name"/></xsl:attribute>		
> 		<xsl:attribute
> name="scope_description"><xsl:value-of
> select="@Notes"/></xsl:attribute>
> 		<xsl:attribute name="parent_id">
> 		  <xsl:choose>
>   	  	    <xsl:when test="@Predecessors =
> ''">1</xsl:when>
>   	  	    <xsl:otherwise><xsl:value-of
> select="@Predecessors"/></xsl:otherwise>
>   	  	  </xsl:choose>
> 		</xsl:attribute>
> 	</xsl:element>
> 	</xsl:template>
> </xsl:stylesheet>  
> 
> 
> However, the test that identifies the cae where
> @Predecessors = '' does not seem to be activating
> since  instead of putting a 1 as the value of the
> parent_id tag, it leaves it as "".
> 
> Can anyone see why this might be so?
> 
> thanks heaps
> 
> David Buddrige.  8-)
> 
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