Extract strings between two special charecter($) using XSLT 1.0 - xslt-1.0

Question

Input: "abcdef$ghi$jklmno$pqrst$ wx $yx$"
Expected output:
<tokens>
<token>$ghi$</token>
<token>$pqrst</token>
<token>$yx$</token>
</tokens>
As per sample input string, output must be like Expected output by using XSLT 1.0
Thanks in Advance

Answer 1

For each pair of dollar signs (1,2), (3,4), ... (2 × n - 1, 2 × n) you want a token element with the text between dollar sign number 2 × n - 1 and dollar sign number 2 n.
One of two cases will necessarily apply.
Case 1: there is some fixed maximum value of n, and it's relatively small (say, less than 5 or 10). In this case a simple sequence of xs:variable assignments with appropriate calls to substring-before and substring-after should suffice, and you're done. You'll end up with something like this:
Let s0 be the original string, s1 the substring after the first dollar sign in s0, t1 the substring before the first dollar sign in s1, and r1 the substring after the first dollar sign in s1.
Now let s2 be the substring after the first dollar sign in r1, t2 the substring before the first dollar sign in s2, and r2 the substring after the first dollar sign in s2.
Repeat as needed: for i in 3 to n, let si be the substring after the first dollar sign in ri - 1, ti the substring before the first dollar sign in si, and ri the substring after the first dollar sign in si.
Case 2: there is no maximum n. In this case the straightforward approach in XSLT 1.0 is to write a named template which (a) drops the substring before the first dollar sign, (b) constructs a token element containing a dollar sign, the string after the first dollar sign and before second dollar sign, and (c) calls itself recursively with the substring after the second dollar sign. Add appropriate boundary conditions for empty strings, strings with odd numbers of dollar signs, and other input errors, and you're done.
So: go read up on the string functions of XSLT 1.0 and solve your problem. Come back (and show your work) if you have further trouble.

Answer 2

Hope the below xsl helps you. It works. I tried it myself.
<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" omit-xml-declaration="yes"/>
<xsl:template match="/">
<xsl:variable name="input">
<xsl:text>abcdef$ghi$jklmno$pqrst$ wx$yx$</xsl:text>
</xsl:variable>
<tokens>
<xsl:text>
</xsl:text>
<xsl:analyze-string select="$input" regex="(\$[a-z]+\$)">
<xsl:matching-substring>
<token>
<xsl:value-of select="regex-group(1)"/>
</token>
<xsl:text>
</xsl:text>
</xsl:matching-substring>
</xsl:analyze-string>
</tokens>
</xsl:template>
</xsl:stylesheet>