Extreme XSLT XML Flattening - xslt

Question

I have the following input XML file:
<root>
<a>
<b>1</b>
</a>
<c>
<d>
<e>2</e>
<f>3</f> or <e>3</e>
</d>
<g h="4"/>
<i>
<j>
<k>
<l m="5" n="6" o="7" />
<l m="8" n="9" o="0" />
</k>
</j>
</i>
</c>
</root>
I would like to use XSLT to transform it into the follow outputs:
OUTPUT 1
<root>
<row b="1" e="2" f="3" h="4" m="5" n="6" o="7" />
<row b="1" e="2" f="3" h="4" m="8" n="9" o="0" />
<root>
OUTPUT 2
<root>
<row b="1" e="2" h="4" m="5" n="6" o="7" />
<row b="1" e="2" h="4" m="8" n="9" o="0" />
<row b="1" e="3" h="4" m="5" n="6" o="7" />
<row b="1" e="3" h="4" m="8" n="9" o="0" />
<root>
Can anyone help my XSLT isn't very strong. Thanks.

Answer 1

It will be easier if you let the occurrence of <e> determine the outer loop constructing your <row>s and have a inner loop iterating over all <l>s.
Try something like this:
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="/">
<xsl:apply-templates />
</xsl:template>
<xsl:template match="root">
<root>
<xsl:apply-templates />
</root>
</xsl:template>
<xsl:template match="e">
<!-- store values of 'e' and 'f' in params -->
<xsl:param name="value_of_e" select="." />
<xsl:param name="value_of_f" select="ancestor::d[1]/f" />
<!-- iterate over all 'l's -->
<xsl:for-each select="//l">
<xsl:element name="row">
<xsl:attribute name="b">
<xsl:value-of select="//b" />
</xsl:attribute>
<xsl:attribute name="e">
<xsl:value-of select="$value_of_e" />
</xsl:attribute>
<!-- only include 'f' if it has a value -->
<xsl:if test="$value_of_f != ''">
<xsl:attribute name="f">
<xsl:value-of select="$value_of_f" />
</xsl:attribute>
</xsl:if>
<xsl:attribute name="h">
<xsl:value-of select="ancestor::c[1]/g/#h" />
</xsl:attribute>
<xsl:attribute name="m">
<xsl:value-of select="./#m" />
</xsl:attribute>
<xsl:attribute name="n">
<xsl:value-of select="./#n" />
</xsl:attribute>
<xsl:attribute name="o">
<xsl:value-of select="./#o" />
</xsl:attribute>
</xsl:element>
</xsl:for-each>
</xsl:template>
<xsl:template match="b" />
<xsl:template match="f" />
<xsl:template match="g" />
</xsl:stylesheet>