complex variables in xslt template v1, v2 - xslt

Question

I have source xml looking like this :
<Data>
<ActionPlaces>
<ActionPlace>
<ActionPlaceID>74</ActionPlaceID>
<PlaceName>Theatre Of Classic</PlaceName>
</ActionPlace>
</ActionPlaces>
<Actions>
<CommonAction Id="2075" Name="King">
<Action>
<ActionID>4706</ActionID>
<ActionPlaceID>74</ActionPlaceID>
</Action>
</CommonAction>
</Actions>
</Data>
Which is to transform to this:
<category name="King">
<name>King</name>
<parent name="Theatre Of Classic" />
</category>
I want to use variable :
<xsl:template match="ActionPlaces">
<xsl:variable name="id" select="/ActionPlace/ActionPlaceID"/>
<xsl:template match="CommonAction" >
<category name="<xsl:value-of select="#name"/> >
<name><xsl:value-of select="#name"/></name>
<parent <xsl:if test="/Action/ActionPlaceID = $id">
name=/Action/ActionPlaceID/> <- how to get name of theatre here?
</xsl:template>
Can variable store not only id but name also? And how to get it? What is the most common approach to handle this ?

Answer 1

Here's one option using XSL keys (as #michael-hor257k suggested):
Input
<Root>
<ActionPlaces>
<ActionPlace>
<ActionPlaceID>74</ActionPlaceID>
<PlaceName>Theatre Of Classic</PlaceName>
</ActionPlace>
</ActionPlaces>
<Actions>
<CommonAction Id="2075" Name="King">
<Action>
<ActionID>4706</ActionID>
<ActionPlaceID>74</ActionPlaceID>
</Action>
</CommonAction>
</Actions>
</Root>
Stylesheet
<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"/>
<!-- Collect all <ActionPlace> elements into an XSL key -->
<xsl:key name="ActionPlaceById" match="ActionPlace" use="ActionPlaceID"/>
<xsl:template match="/">
<xsl:apply-templates select="Root/Actions/CommonAction"/>
</xsl:template>
<xsl:template match="CommonAction">
<category name="{#Name}">
<name>
<xsl:value-of select="#Name"/>
</name>
<!--
Using the ActionPlaceById key we created earlier, fetch the <ActionPlace>
element that has an <ActionPlaceID> child that has the same value as the
<ActionPlaceID> descendant of the current <CommonAction> element.
-->
<parent name="{key('ActionPlaceById', Action/ActionPlaceID)/PlaceName}"/>
</category>
</xsl:template>
</xsl:stylesheet>
Output
<?xml version="1.0" encoding="utf-8"?>
<category name="King">
<name>King</name>
<parent name="Theatre Of Classic"/>
</category>