RE: [xsl] Template call question

["Michael Kay" <mhk@xxxxxxxxx>]

I haven't fully understood this, but I've made a few points where the code
looks questionable. 

> I have the following xslt:
> 
> 
> <?xml version="1.0" encoding="UTF-8"?>
> <xsl:stylesheet version="1.0"
> xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
> 	<xsl:output method="xml" version="1.0" encoding="UTF-8"
> indent="yes"/>
> 
> <xsl:variable name="MYPARENT" 
> select="Redirect_URL_Comparison/QUERY1"/>
> <xsl:template match="Redirect_URL_Comparison">
> 
> <table>
> <xsl:variable name="ORG_URL"
> select="QUERY1/row/VWCAMPAIGNREDIRECT.AR_URL"/>

The QUERY1 has multiple rows, so this will select a set of elements. No
problem with that, but because you used a singular variable name I'm not
sure you're aware of it.

> <xsl:variable name="NEW_URL" select="NONE"/>

Since you have no elements named "NONE", this variable will be an empty
node-set. Again, not intrisically wrong, so long as you know what you are
doing.

> <tr>
> 		<td>name:</td>
> 		<td>
> 			<xsl:value-of
> select="$MYPARENT/row/VWCAMPAIGNREDIRECT.AR_NAME"/>

Because there are multiple rows, xsl:value-of (in XSLT 1.0) will output the
value of this item in the first row. Is that what you intended?

> <xsl:for-each select="QUERY1">

There is only one QUERY1 element in your data, so sorting the set of QUERY1
elements is not going to achieve much.
> 
> <xsl:sort select="row/VWCAMPAIGNREDIRECT.AR_URL"/>
> 
> <xsl:call-template name="get_url">
> <xsl:with-param name="PREV_URL"/>
> <xsl:with-param name="CURR_URL" select="$ORG_URL"/>
> </xsl:call-template>
> </xsl:for-each>
> </table>
> 
> </xsl:template>
> 
> 
> <xsl:template name="get_url">
>  <xsl:param name="PREV_URL"/>
>  <xsl:param name="CURR_URL"/>
> 
> <xsl:for-each
> select="$MYPARENT/row[VWCAMPAIGNREDIRECT.AR_URL=$CURR_URL]">

In the xsl:for-each you're processing all the rows where this item is equal
to $CURR_URL, which as noted earlier is actually a node-set containing all
the values of VWCAMPAIGNREDIRECT.AR_URL. "=" returns true if the value
matches any of these values, which it always will, because all the values
are present in the set.  

> <tr>
> <xsl:choose>
> <xsl:when
>
test="((normalize-space($CURR_URL)=normalize-space(VWCAMPAIGNREDIRECT.AR_URL
)) )">

Now you have me completely confused: you've selected nodes where A=$B, and
now you're testing to see if normalize-space(A)=normalize-space($B). If two
strings are equal, they will still be equal after normalizing whitespace, so
the xsl:when branch will always be chosen. In fact it's more subtle than
this, because normalize-space selects the first node in the node-set, but I
think we're now so many errors deep that it's not worth further analysis.

Michael Kay