Re: [xsl] union/intersection on attribute values

> How do you de-dup if you have already fromed a variable $In2not1:

well if the variable is a result tree fragment, and you are using pure
XSLT 1.0, then you don't.

If it's an RTF and you are prepared to use xxx:node-set() extension
then you go
<xsl:variable name="new-var">
  <xsl:for-each select="$old-var ... whatever technique you wish to use.

David

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