Case 1
<xsl:stylesheet version="1.0"xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:svg="http://www.w3.org/2000/svg"
xmlns:fo="http://www.w3.org/1999/XSL/Format"
xmlns:dyn="http://exslt.org/dynamic" extension-element-prefixes="dyn"
>
The dyn:evaluate function evaluates a string as an XPath expression and returns the resulting value, which might be a boolean, number, string, node set, result tree fragment or external object. The sole argument is the string to be evaluated.
dyn:evaluate($xpath_expression)
http://www.exslt.org/dyn/functions/evaluate/index.html
Case 2
*[name() = $xpath_expression]Case 3
XSLT 2.0*[ends-with(name(), $xpath_expression)]
XSLT 1.0
*[substring(name(),string-length(name())-1) = $xpath_expression]