Help with multi-pass XSLT using node-set() - xslt

Question

I need to display certain data in a tabular form, and would prefer to use multi-pass
xslt using node-set() so that I can avoid deploying additional tools (like xsltproc).
Right now, I'm able to perform the required task in two steps i.e.
Step 1: convert XML-1 to XMl-2 using identity template (xsl:copy, using xsl:element to
add dynamic elements 'dev' and 'qa`):
<projectteam>
<member>
<name>John</name>
<role>dev</role>
<hrs>100</hrs>
</member>
<member>
<name>Peter</name>
<role>qa</role>
<hrs>80</hrs>
</member>
</projectteam>
To
<projectteam>
<member>
<name>John</name>
<dev>100</dev>
</member>
<member>
<name>Peter</name>
<qa>80</qa>
</member>
<projectteam>
And then, use another XSLT-FO style sheet to transform XML #2 into a PDF document with the required layout:
name | dev | qa |
-----------------
John | 100 | |
Peter| | 80 |
-----------------
Total| 100 | 80 |
I've tried using node-set() (incorrectly I suppose) to combine both the steps, but
it wouldn't work as the result I get is as follows:
name | dev | qa |
-----------------
Total| 0 | 0 |
Stylesheet-1: converts XML-1 to XML-2, imports another stylesheet 'projDisplay.xsl',
uses node-set() to invoke the imported stylesheet, but the data doesn't get displayed?
<xsl:stylesheet
version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:fo="http://www.w3.org/1999/XSL/Format"
xmlns:exslt="http://exslt.org/common"
>
<!-- import stylesheet to display XML-2 in tabular form -->
<xsl:import href="projDisplay.xsl"/>
<xsl:template match="/">
<fo:root>
<xsl:apply-templates/>
</fo:root>
</xsl:template>
<xsl:template match="#*|node()">
<xsl:variable name="newXmlData">
<xsl:copy>
<xsl:apply-templates select="#*|node()"/>
</xsl:copy>
</xsl:variable>
<!-- ==> This is where my problem is - it goes to the template defined in -->
<!-- projDisplay.xsl (xslt-fo, pretty big one with page layout etc. hence -->
<!-- not included here, but it works on its own though) as I can see the -->
<!-- table header, and an empty totals row, but non of the rows are displayed -->
<xsl:apply-templates
select="exslt:node-set($newXmlData)/projectteam" mode="display"
/>
</xsl:template>
<!-- replace element 'role' with a new element - role name (i.e. dev or qa) -->
<!-- and set its value as 'hrs -->
<xsl:template match="role">
<xsl:element name="{.}"> <xsl:value-of select="../hrs"/> </xsl:element>
</xsl:template>
<!-- eliminate element 'hrs' -->
<xsl:template match="hrs"/>
</xsl:stylesheet>
The commented section in the stylesheet doesn't look right to me. Any suggestions
about how to correct it?
Thanks!

Answer 1

Here's the solution that works. It's based on Tomalak's original solution with some minor
modifications (like mode flags etc.) Again, thanks to Tomalak!!
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:exslt="http://exslt.org/common"
version="1.0">
<xsl:import href="projDisplay.xsl"/>
<xsl:template match="/">
<!-- store intermediate form as RTF -->
<xsl:variable name="newXmlData">
<xsl:apply-templates mode="filter"/>
</xsl:variable>
<!-- Now apply templates (with xslt-fo) defined in projDisplay.xsl with -->
<!-- the root template as <xsl:template match="projectteam" mode="display"> -->
<!-- to the above RTF (i.e. after the original XML has be convertedr) -->
<xsl:apply-templates select="exslt:node-set($newXmlData)/projectteam" mode="display"/>
</xsl:template>
<!-- use identity templates to copy and modify original XML -->
<xsl:template match="#*|node()" mode="filter">
<xsl:copy>
<xsl:apply-templates select="#*|node()" mode="filter"/>
</xsl:copy>
</xsl:template>
<!-- replace element 'role' with a new element - role name (i.e. dev or qa) -->
<!-- and set its value as 'hrs -->
<xsl:template match="member/role" mode="filter">
<xsl:element name="{.}"> <xsl:value-of select="../hrs"/> </xsl:element>
</xsl:template>
<!-- eliminate element 'hrs' -->
<xsl:template match="hrs" mode="filter"/>
</xsl:stylesheet>

Answer 2

What about:
<xsl:stylesheet
version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:fo="http://www.w3.org/1999/XSL/Format"
xmlns:exslt="http://exslt.org/common"
exclude-result-prefixes="exslt"
>
<xsl:import href="projDisplay.xsl"/>
<xsl:template match="/">
<!-- store intermediary format as a RTF -->
<xsl:variable name="newXmlData">
<xsl:apply-templates />
</xsl:variable>
<!-- now we can the apply imported rules -->
<xsl:apply-templates
select="exslt:node-set($newXmlData)/projectteam"
mode="import"
/>
</xsl:template>
<xsl:template match="#*|node()">
<xsl:copy>
<xsl:apply-templates select="#*|node()"/>
</xsl:copy>
</xsl:template>
<xsl:template match="member/role">
<xsl:element name="{.}">
<xsl:value-of select="../hrs" />
</xsl:element>
</xsl:template>
<xsl:template match="member/*" />
<xsl:template match="projectteam" mode="import">
<fo:root>
<xsl:apply-imports />
</fo:root>
</xsl:template>
</xsl:stylesheet>