Using correct regex in xslt 2.0 - xslt

Question

I've been stuck using the correct regex. I need to tokenize each data per keys along with there values. In my example below,
Sample File:
<Rec>
<Data>/CHG1/EUR1000,00/EXCH/0,10/CPRP/Payment Code 1</Data>
<Data>/CHG1/EUR1000,00/EXCH/0,10/CPRP/Payment Code 1</Data>
<Data>/CHG3/EUR3000,00/PURP//CD/Payment Code 3</Data>
<Data>/CHG5/EUR5000,00/PURP//PRTRY/Payment Code 5</Data>
<Data>/ORIG//CSID/EUR7000,00/BENM//ID/Payment Code 7</Data>
</Rec>
The keys with '//' in the middle is considered as 1 key. I need to generate the output like this:
<Data>
<Group>
<Token>/CHG1/EUR1000,00</Token>
<Token>/EXCH/0,10</Token>
<Token>/CPRP/Payment Code 1</Token>
</Group>
<Group>
<Token>/CHG3/EUR3000,00</Token>
<Token>/PURP//CD/Payment Code 3</Token>
</Group>
<Group>
<Token>/CHG5/EUR5000,00</Token>
<Token>/PURP//PRTRY/Payment Code 5</Token>
</Group>
<Group>
<Token>/ORIG//CSID/EUR7000,00</Token>
<Token>/BENM//ID/Payment Code 7</Token>
</Group>
</Data>
But, my generated output is like this:
<Data>
<Group>
<Token>/CHG1/</Token>
<Token>/EXCH/</Token>
<Token>/CPRP/</Token>
</Group>
<Group>
<Token>/CHG3/</Token>
<Token>/PURP//CD/</Token>
</Group>
<Group>
<Token>/CHG5/</Token>
<Token>/PURP//PRTRY/</Token>
</Group>
<Group>
<Token>/ORIG//CSID/</Token>
<Token>/BENM//ID/</Token>
</Group>
</Data>
Here is my XSLT that I've been using:
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="2.0">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
<xsl:template match="node()|#*">
<xsl:copy>
<xsl:apply-templates select="node()[boolean(normalize-space())]|#*"/>
</xsl:copy>
</xsl:template>
<xsl:template match="Data">
<xsl:for-each select=".">
<Group>
<xsl:analyze-string select="." regex="\/[A-Z]+[0-9]?\/(\/(CD|PRTRY|MARF|ID|CSID|NAME|RID)\/)?">
<xsl:matching-substring>
<xsl:variable name="val" select="."/>
<Token>
<xsl:value-of select="$val"/>
</Token>
</xsl:matching-substring>
</xsl:analyze-string>
</Group>
</xsl:for-each>
</xsl:template>
There is something missing in my regex expression. Can anyone help me figure out? Thank you for your feedback.

Answer 1

I can't make heads or tails of your expected output. I suspect the correct output should be actually something like:
<?xml version="1.0" encoding="UTF-8"?>
<Rec>
<Group>
<Token>CHG1/EUR1000,00</Token>
<Token>EXCH/0,10</Token>
<Token>CPRP/Payment Code 1</Token>
</Group>
<Group>
<Token>CHG1/EUR1000,00</Token>
<Token>EXCH/0,10</Token>
<Token>CPRP/Payment Code 1</Token>
</Group>
<Group>
<Token>CHG3/EUR3000,00</Token>
<Token>PURP/</Token>
<Token>CD/Payment Code 3</Token>
</Group>
<Group>
<Token>CHG5/EUR5000,00</Token>
<Token>PURP/</Token>
<Token>PRTRY/Payment Code 5</Token>
</Group>
<Group>
<Token>ORIG/</Token>
<Token>CSID/EUR7000,00</Token>
<Token>BENM/</Token>
<Token>ID/Payment Code 7</Token>
</Group>
</Rec>
If so, I would suggest you change your approach and try:
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:strip-space elements="*"/>
<!-- identity transform -->
<xsl:template match="#*|node()">
<xsl:copy>
<xsl:apply-templates select="#*|node()"/>
</xsl:copy>
</xsl:template>
<xsl:template match="Data">
<xsl:variable name="t" select="tokenize(., '/')" />
<Group>
<xsl:for-each select="$t[position() mod 2 = 0]">
<xsl:variable name="i" select="index-of($t, .)"/>
<Token>
<xsl:value-of select="." />
<xsl:text>/</xsl:text>
<xsl:value-of select="$t[$i + 1]" />
</Token>
</xsl:for-each>
</Group>
</xsl:template>
</xsl:stylesheet>
Demo: http://xsltransform.net/93dEHGr
Or even simpler:
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:strip-space elements="*"/>
<!-- identity transform -->
<xsl:template match="#*|node()">
<xsl:copy>
<xsl:apply-templates select="#*|node()"/>
</xsl:copy>
</xsl:template>
<xsl:template match="Data">
<Group>
<xsl:for-each-group select="tokenize(., '/')" group-by="position() idiv 2">
<Token>
<xsl:value-of select="current-group()" separator="/"/>
</Token>
</xsl:for-each-group>
</Group>
</xsl:template>
</xsl:stylesheet>
Demo: http://xsltransform.net/93dEHGr/2
Added:
Actually, the keys with 2 '//' in the middle is considered as 1 key.
Well, then let's take the // strings out of the game before doing the tokenizing, and restore them at the end:
<xsl:template match="Data">
<Group>
<xsl:for-each-group select="tokenize(replace(., '//', '§§§'), '/')" group-by="position() idiv 2">
<Token>
<xsl:value-of select="replace(string-join(current-group(), '/'), '§§§', '//')" />
</Token>
</xsl:for-each-group>
</Group>
</xsl:template>
Result
<?xml version="1.0" encoding="UTF-8"?>
<Rec>
<Group>
<Token/>
<Token>CHG1/EUR1000,00</Token>
<Token>EXCH/0,10</Token>
<Token>CPRP/Payment Code 1</Token>
</Group>
<Group>
<Token/>
<Token>CHG1/EUR1000,00</Token>
<Token>EXCH/0,10</Token>
<Token>CPRP/Payment Code 1</Token>
</Group>
<Group>
<Token/>
<Token>CHG3/EUR3000,00</Token>
<Token>PURP//CD/Payment Code 3</Token>
</Group>
<Group>
<Token/>
<Token>CHG5/EUR5000,00</Token>
<Token>PURP//PRTRY/Payment Code 5</Token>
</Group>
<Group>
<Token/>
<Token>ORIG//CSID/EUR7000,00</Token>
<Token>BENM//ID/Payment Code 7</Token>
</Group>
</Rec>
http://xsltransform.net/93dEHGr/4

Answer 2

You can try this with tokenize in xslt 2.0
<xsl:template match="Rec">
<Data>
<xsl:apply-templates/>
</Data>
</xsl:template>
<xsl:template match="Data">
<Group>
<xsl:for-each select="tokenize(., '0/')">
<Token>
<xsl:if test="position() ne 1">
<xsl:text>/</xsl:text>
</xsl:if>
<xsl:value-of select="."/>
<xsl:if test="position() ne last()">
<xsl:text>0</xsl:text>
</xsl:if>
</Token>
</xsl:for-each>
</Group>
</xsl:template>