Global variable in included stylesheet

Hello!

I have xml file (global.xml) and two xsl files (1.xsl, 2.xsl).
File global.xml is transformed with the stylesheet 1.xsl.
File 2.xsl is included in 1.xsl.

This files here:

File global.xml

<?xml version="1.0"?>
<global-settings>

	<supporting-languages>
		<language ID="En" caption="English"/>
		<language ID="De" caption="German"/>
	</supporting-languages>
	
	<parameter name="DefaultLanguageID" value="En"/>
	<parameter name="DefaultMenuItemID" value="miCommonInformation"/>

</global-settings>


--------------------------------------------------

File 1.xsl

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

<xsl:include href="2.xsl"/>

<xsl:variable name="DefaultLanguageID"/>

	<xsl:template match="global-settings">
		<xsl:variable name="DefaultLanguageID" select="parameter[@name='DefaultLanguageID']/@value"/>

		<!-- Display variable value in 1.xsl -->

		<hr/>
		[1.xsl]: <xsl:value-of select="$DefaultLanguageID"/>
		<hr/>

		<xsl:apply-templates select="parameter"/>

	</xsl:template>

</xsl:stylesheet>

-----------------------------------------------------

File 2.xsl

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

	<xsl:template match="parameter">

			It is the parameter

			<!-- Display variable value in 2.xsl -->

			[2.xsl]: <xsl:value-of select="$DefaultLanguageID"/>
			<br/>
	</xsl:template>

</xsl:stylesheet>

----------------------------------------------------




After the transforming i see:

-----------------
[1.xsl]: En
-----------------
It is the parameter
[2.xsl]: 
It is the parameter
[2.xsl]: 


The problem - i cann't get the value of global variable $DefaultLanguageID in included stylesheet 2.xsl.
I thought all global variables must be available anywhere.

Is it wrong?
How can i obtain $DefaultLanguageID in 2.xsl?

...and sorry for my poor English...

Best regards,
Andrey

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