I have to compare my variable value to the value #0.0'%'(single quotes is part of the value)

But obviously when i write

<xsl:if test="$myvalue = ' #0.0% ' "> it is not the same as <xsl:if test="$myvalue = ' #0.0'%' ' ">

And <xsl:if test="$myvalue = ' #0.0'%' ' "> throws an error.

Is there an escape character for ' that i can use.

You're best bet is probably to do this:

<xsl:variable name="mytest">#0.0'%'</xsl:variable>

<xsl:if test="%myvalue = $mytest">

/- Sam Judson : Wrox Technical Editor -/

With XSLT/XPath 2.0 you can double a quote to escape it e.g.