[Fwd: Re: Re: Using a variable in XSLT]

Hi,
I am still needing your help.

I want to transform a xsd file that contains documentation in multiple languages. Source Example
	<xs:element name="account" type="Account">
		<xs:annotation>
			<xs:documentation xml:lang="en">This is the English general description
				<sys:one>That's the special purpose description for system 1</sys:one>
				<sys:two>That's the special purpose description for system 2</sys:two>
                      </xs:documentation>
			<xs:documentation xml:lang="de">Das ist die deutsche allgemeneine Beschreibung.
				<sys:one>Das ist die spezielle Beschreibung für System 1</sys:one>
				<sys:two>Das ist die spezielle Beschreibung für System 2</sys:two>			</xs:documentation>
		</xs:annotation>
	</xs:element>

I would like to be able to choose a language. Such that all documentation elements but those in the selected language are erased.
I also would like to be able to choose a sys. Such that only the selected sys is present in the output.

The result file should like this.
	<xs:element name="account" type="Account">
		<xs:annotation>
			<xs:documentation xml:lang="de">
				Das ist die spezielle Beschreibung für System 1
			</xs:documentation>
		</xs:annotation>
	</xs:element>

Thanks in advance
TMS

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:sys="http://www.you-know-who.com/2003/systems"
version="1.0">

<xsl:param name="SystemSelected" select="'sys:ARTS'" />
<xsl:param name="lang" select="'de'" />

<xsl:template match='/'>
	<xsl:apply-templates/>
</xsl:template>

<!-- This is to take out the documentation in all but the selected language -->
<!-- Would be nice to use a variable here -->
<xsl:template match="//xs:annotation/xs:documentation[not(lang('de'))]" priority="2"/>
<!-- This is to select the SelectedLanguage and the SelectedSystem and to take it one level higher -->

<!-- This doesn't deliver the expected result. In particular because xs:documentation is not present in the output anymore -->
<xsl:template match="//xs:annotation/xs:documentation">
<xsl:apply-templates select="self::*[lang($lang)]/*[name()=$SystemSelected]"/>
</xsl:template>

<xsl:template match='@* | node()' priority="-1">
	<xsl:copy>
		<xsl:apply-templates select='@* | node()'/>
	</xsl:copy>
</xsl:template>