XML/XSLT: Setting xsl:include href attribute with a variable

Question

I have a main layout stylesheet and depending on which page the user selects I want to use xsl:include to display the selected information in the 'content' DIV. The process works fine if hardcode it like this:
<xsl:include href="welcome.xsl"/>
<div id="content"
<xsl:call-template name="welcome"/>
</div>
but, what I would like to do is have the name of the included template pulled from the xml file depending on which page was selected by the user. Something similar to this:
<xsl:variable name="ss">
<xsl:text><xsl:value-of select="root/stylesheet"/></xsl:text>
</xsl:variable>
<xsl:include href="{$ss}.xsl"/>
<div id="content">
<xsl:apply-template name="{$ss}"/>
</div>
So far I have tried using many different forms of code and have been unable to get this to work. Any ideas?
EDIT: Okay, I have it partly figured out, at least why it isn't working. As far as I can tell, the 'xsl:include' tag must be a child of the 'xsl:stylesheet' tag, and is thus declared before the <xsl:template match="/"> which means it can't read the xml element to even store it in the variable. I have an idea of how to accomplish what I need, though.
Last edited by munkyeetr (2009-01-28 03:29:58)

Answer 1

I have attempted the same thing before as well. The only way I was able to dynamically build the xsl:include was to declare a new namespace e.g xmlns:out="output.xsl" in my XSL file and do something like the following:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:out="output.xsl">
<xsl:namespace-alias stylesheet-prefix="out" result-prefix="xsl"/>
<xsl:varible name="xxx" select=" 'myFile.xsl' "/>
<xsl:template match="/">
<out:stylesheet version="1.0">
<out:template match="/">
<out:include>
<xsl:attribute name="href">
<xsl:value-of select="$xxx" />
</xsl:attribute>
</out:include>
</out:template>
</out:stylesheet>
</xsl:template>
</xsl:stylesheet>
When applied to any valid XML document this produces the XSL file you are after as the output.
To use this output against your intended XML source consider the following: A Java program can very quickly apply the above stylesheet to any XML source to get the output you want... then apply that XSL result to the actual XML document you are wanting to transform. From here you can do what you want with the transformed result.