Getting values after the key colon in xslt v2.0 - xslt

Question

I've seen many related topics in the internet about getting the value after the colon or keys. So, what I did is, I applied all the possible solution provided by the xslt expert. But, upon combining the codes, I can't get the exact structure of the output. Here is my sample input file:
<Data>
:A:00001
:B:Sample Data Only B
:C:082917
:D2:Sample Data Only D1/090909
:E2:Sample Data Only E1/121212
:E2:Sample Data only E2/232323
:D2:Sample Data Only D2/343434
:E2:Sample Data Only E1/454545
:F:092917
:A:00002
:B:Sample Data Only BB
:C:053017
:D2:Sample Data Only DD2/565656
:E2:Sample Data Only EE1/676767
:F:063017
</Data>
For :C: and :F:, they belong to the same level group <AccountPeriod>, but in my output it created another level group of <AccountPeriod> for :C: and :F:. For every occurrence of :D2:, it should create <Detail> group, and for each occurrence of :E:, it should create <Group> group inside <Trans> group. But, in my current output, it only gets all the value of :D: inside the <Group> elements instead of :E:. And lastly, my current output didn't iterate even if I have 2 occurrence of :A:. The tokenize(.,'\n\n') didn't work in my code.
Here is my XSLT code:
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="2.0">
<xsl:output method="xml" omit-xml-declaration="yes" encoding="UTF-8" indent="yes" />
<xsl:template match="#*|node()">
<xsl:copy>
<xsl:apply-templates select="#*|node()"/>
</xsl:copy>
</xsl:template>
<xsl:template match="Data">
<xsl:for-each select="tokenize(., '\n\n')">
<Data>
<xsl:analyze-string select="." regex=":([0-9A-Za-z]+):(.*)\n">
<xsl:matching-substring>
<xsl:if test="regex-group(1)='A'">
<Line>
<xsl:value-of select="regex-group(2)"/>
</Line>
</xsl:if>
<xsl:if test="regex-group(1)='B'">
<Number>
<xsl:value-of select="regex-group(2)"/>
</Number>
</xsl:if>
<xsl:variable name="SDate">
<xsl:if test="regex-group(1)='C'">
<xsl:value-of select="regex-group(2)"/>
</xsl:if>
</xsl:variable>
<xsl:variable name="EDate">
<xsl:if test="regex-group(1)='F'">
<xsl:value-of select="regex-group(2)"/>
</xsl:if>
</xsl:variable>
<xsl:if test="not(normalize-space($SDate)='') or not(normalize-space($EDate)='')">
<AccountPeriod>
<StartDate>
<xsl:value-of select="$SDate"/>
</StartDate>
<EndDate>
<xsl:value-of select="$EDate"/>
</EndDate>
</AccountPeriod>
</xsl:if>
</xsl:matching-substring>
</xsl:analyze-string>
<xsl:variable name="temp" as="element()*">
<xsl:analyze-string select="." regex="^:([D2][E2]):(.*)$" flags="m">
<xsl:matching-substring>
<xsl:element name="Detail{regex-group(1)}">
<xsl:value-of select="regex-group(2)"/>
</xsl:element>
</xsl:matching-substring>
</xsl:analyze-string>
</xsl:variable>
<xsl:for-each-group select="$temp" group-starting-with="DetailD">
<Detail>
<Seq>
<xsl:value-of select="substring-after(current-group()[1],'/')"/>
</Seq>
<Ext>
<xsl:value-of select="substring-before(current-group()[1],'/')"/>
</Ext>
<Trans>
<xsl:for-each select="current-group()[position() ge 2]">
<Group>
<AcctNo>
<xsl:value-of select="substring-after(.,'/')"/>
</AcctNo>
<Desc>
<xsl:value-of select="substring-before(.,'/')"/>
</Desc>
</Group>
</xsl:for-each>
</Trans>
</Detail>
</xsl:for-each-group>
</Data>
</xsl:for-each>
</xsl:template>
Current Output:
<Data>
<Line>00001</Line>
<Number>Sample Data Only B</Number>
<AccountPeriod>
<StartDate>082917</StartDate>
<EndDate/>
</AccountPeriod>
<AccountPeriod>
<StartDate/>
<EndDate>092917</EndDate>
</AccountPeriod>
<Line>00002</Line>
<Number>Sample Data Only BB</Number>
<AccountPeriod>
<StartDate>053017</StartDate>
<EndDate/>
</AccountPeriod>
<AccountPeriod>
<StartDate/>
<EndDate>063017</EndDate>
</AccountPeriod>
<Detail>
<Seq>090909</Seq>
<Ext>Sample Data Only D1</Ext>
<Trans>
<Group>
<DetailD2>Sample Data Only D2/343434</DetailD2>
</Group>
<Group>
<DetailD2>Sample Data Only DD2/565656</DetailD2>
</Group>
</Trans>
</Detail>
</Data>
Expected output:
<Record>
<Data>
<Line>00001</Line>
<Number>Sample Data Only B</Number>
<AccountPeriod>
<StartDate>082917</StartDate>
<EndDate>092917</EndDate>
</AccountPeriod>
<Detail>
<Seq>090909</Seq>
<Ext>Sample Data Only D1</Ext>
<Trans>
<Group>
<AcctNo>121212</AcctNo>
<Desc>Sample Data Only E1</Desc>
</Group>
<Group>
<AcctNo>232323</AcctNo>
<Desc>Sample Data Only E2</Desc>
</Group>
</Trans>
</Detail>
<Detail>
<Seq>343434</Seq>
<Ext>Sample Data Only D2</Ext>
<Trans>
<Group>
<AcctNo>454545</AcctNo>
<Desc>Sample Data Only E1</Desc>
</Group>
</Trans>
</Detail>
</Data>
<Data>
<Line>00002</Line>
<Number>Sample Data Only BB</Number>
<AccountPeriod>
<StartDate>053017</StartDate>
<EndDate>063017</EndDate>
</AccountPeriod>
<Detail>
<Seq>565656</Seq>
<Ext>Sample Data Only DD2</Ext>
<Trans>
<Group>
<AcctNo>676767</AcctNo>
<Desc>Sample Data Only EE1</Desc>
</Group>
</Trans>
</Detail>
</Data>
Your feedback is much appreciated. Thanks!