> Instead of use 'article' like in your solutions, I need to use $class
> 
> <xsl:template match="xs:element[@name=$class]/xs:complexType/xs:all">
> 
> but occurs an error and I don't know how correct it
> 
> 
> Somebody could help me?
> 

What, without seeing the error message?.

A guess, you're using an XSLT 1.0 processor, which doesn't allow variables
in match patterns.

Michael Kay
http://www.saxonica.com/