assign values to variabiles

[mickey0]

Hello,
I have this string: <hello>\n<world>
And I have to do this:

 <xsl:param name="string"/>
       //assigns substring-before($string,'\n') to $ var1
       //assigns substring-after($string,'\n') to $ var2  
       <xsl:if test= start-with($var1,'<') and end-with($var1,'>'  
          and  start-with($var2,'<') and end-with($var2,'>'     >
                //doSomething
       </xsl:if>
 

I have to know if what is before and after '\n' are two tags...
I'm using xslt 1.0; but what I try hard is assign a these values to var1 and var2.
How can I do, please?
thanks,

[Dormilich]

I think you should assing the strings between < and > to another parameter and compare those.
If fn:replace() is working you might try something like

<xsl:param name="str1" select="replace($var1, "<([^>]+)>")", "$1" />
...
<xsl:if test="$str1 != $str2">
    // doSomething
</xsl:if>