performance,xslt,conditional , Storing reference (hash?) to the node for conditional manipulation


Storing reference (hash?) to the node for conditional manipulation

Question:

Tag: performance,xslt,conditional

Given this pseudo-code:

   <xsl:variable name="check0">
       <xsl:value-of select="($externalFile//i[@attibute = $variable]/..[email protected] < $genDate) and
                             ($externalFile//i[@attibute = $variable]/..[email protected]  > $genDate)"/>
    </xsl:variable>


   <xsl:variable name="check1">
       <xsl:value-of select="($externalFile//i[@attibute = $variable]/..[email protected] < $genDate) and
                             ($externalFile//i[@attibute = $variable]/..[email protected]  > $genDate)"/> 
   </xsl:variable>

Above code checks if some variable is in date range of attributes taken from external .xml file


Is there a way to store the reference to the file so that this:

$externalFile//i[@attibute = $variable] look-up doesn't happen 4 times?

Something like this:

<xsl:variable name="check3">
    <xsl:value-of select="($externalFile//i[@attibute = $variable]/>
</xsl:variable>

<xsl:if $check3/..[email protected] > someValue />
<xsl:if $check3/..[email protected]  < someValue />

<xsl:variable name="outcome">
    <xsl:value-of select="$check3/..[email protected]"/> // <-- retrive some data 
</xsl:variable>

Answer:

The answer is "Yes". You simply need to change your check3 variable to this:

<xsl:variable name="check3" select="$externalFile//i[@attibute = $variable]" />

This way you are referencign the i node in the external file directly, rather than getting the text value of it (which is what xsl:value-of will do)


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