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[xsl] select lang attribute problem

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hello all,

any ideas on selecting nodes based on the 2 following conditions being met

a) existance of lang attribute is boolean false ( in other words when there is no explicit lang attribute select it as a default)

if a) is TRUE then

b) presence of lang="en" is boolean true ( the 'en' would be supplied by a xsl:param)

a solution at the top level of xsl would be most desirable with an xsl:param setting the desired language to extract ............ so far i've got lots of methods,
just can't find anything elegant enough to apply to a larger system for multilingual support. any comments or pointers with how people are approaching multilingual xml/xsl..greatly appreciated.

xml
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<?xml version="1.0" encoding="UTF-8?>
<?xml-stylesheet href="test.xsl" type="text/xsl"?>
<resource>
<test xml:lang="en">test1</test>
<test xml:lang="de">test2</test>
<test >test3</test>
</resource>

xsl ( so far... )
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<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:param name="lang">en</xsl:param>
<xsl:template match="/">

<xsl:apply-templates/>

</xsl:template>

<xsl:template match="test">
<xsl:value-of select="node()">
</xsl:template>

</xsl:stylesheet>

desired result
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test1
test3

thx in advance

,jim fuller


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