get boolean based on an attribute value

Hello,

Here's how my xml looks.

<result>
 <a attr1="something" attr2="false">
 <a attr1="something" attr2="false">
 <a attr1="something" attr2="true">
 <a attr1="something" attr2="false">
 <a attr1="something" attr2="false">
 <a attr1="something" attr2="false">
<result>

I want to do an xsl:if which will return me true if
atleast one of the values of attr2 = true. If all the
values of attr2=false, I want the if statement to
return false.

How can I do that ? Your help is greatly appreciated.

Thanks.

Mark


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