parsing with XSLT - parsing

Question

I am struggling a bit with a solution for the following problem and was hoping someone could point me in the right direction.
To illustrate the issue I will try and pair it down to its most simple form. I have the following data:
<?xml version="1.0" encoding="UTF-8"?>
<SampleData>
<Data>AA-BRAND1,BB-BRAND1,AA-BRAND2</Data>
</SampleData>
and need to produce the following output:
<?xml version="1.0" encoding="UTF-8"?>
<ListOfBrandSales>
<BrandSales>
<BrandChannel>AA</BrandChannel>
<ListOfBrand>
<Brand>BRAND1</Brand>
<Brand>BRAND2</Brand>
</ListOfBrand>
</BrandSales>
<BrandSales>
<BrandChannel>BB</BrandChannel>
<Brand>BRAND1</Brand>
</BrandSales>
</ListOfBrandSales>
I have been playing with the tokenize and distinct-values functions but am unable to get it. Seems like I need to nest these functions and not sure if it is possible. My apologies if the solution is obvious but I am a bit new to XSLT.
Thanks in advance.

Answer 1

How about:
XSLT 2.0
<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
<xsl:variable name="tokens" select="tokenize(/SampleData/Data, ',')" />
<xsl:variable name="channels">
<xsl:for-each select="$tokens">
<channel><xsl:value-of select="substring-before(., '-')"/></channel>
</xsl:for-each>
</xsl:variable>
<xsl:template match="/">
<ListOfBrandSales>
<xsl:for-each select="distinct-values($channels/channel)">
<BrandSales>
<BrandChannel><xsl:value-of select="."/></BrandChannel>
<ListOfBrand>
<xsl:for-each select="$tokens[starts-with(., current())]">
<Brand><xsl:value-of select="substring-after(., '-')"/></Brand>
</xsl:for-each>
</ListOfBrand>
</BrandSales>
</xsl:for-each>
</ListOfBrandSales>
</xsl:template>
</xsl:stylesheet>
Or, if you prefer:
XSLT 2.0
<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
<xsl:template match="/">
<ListOfBrandSales>
<xsl:for-each-group select="tokenize(SampleData/Data, ',')" group-by="substring-before(., '-')">
<BrandSales>
<BrandChannel><xsl:value-of select="current-grouping-key()"/></BrandChannel>
<ListOfBrand>
<xsl:for-each select="current-group()">
<Brand><xsl:value-of select="substring-after(., '-')"/></Brand>
</xsl:for-each>
</ListOfBrand>
</BrandSales>
</xsl:for-each-group>
</ListOfBrandSales>
</xsl:template>
</xsl:stylesheet>