[xsl] 2 problems with variables(include & frame)

[longjohn <longjohn@xxxxxxxxxxxx>]

(I'm using XALAN-XERCES)
FIRST:
...
<xsl:param name="lang"/>
<xsl:include href="/dir/myfile{@lang}.xsl"/>   <!-- myfileen.xsl , 
myfilefr.xsl , myfileit.xsl , etc -->

--> {@lang} (and {$lang} too) doesn't work , '{' not allowed
if I try <xsl:if test=....> , it appears not allowed in this position 
of the style-sheet


SECOND:
....
<frame .....   src="/dir/myfile.jsp?lang={$lang}&grp={$grp}"/>

--> 'lang={$lang}'  works , but '&' not allowed (escape character?)

Thanks for all suggestions!



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