PROBLEM!!!!!!

Hi all,
	I have an xml file that contain the followint line 
<test  name="proof:test>
</test>
<test name="trial:test">
and multiple instances like that
I want to create an HTML file using a stylesheet that grab only the tag
which has the substring proof in his attribute called name
How can I do that?
I tried usint 
<xsl:choose>
<xsl:when test="{substring-before(@name, ':')}[.="proof"]"
.....
but it didn't work
how can I do that??
Reply me as soon as possible
Br
marco


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