> How can I add © in the xsl:variable declaration?

You can always use  © in place of characters in XML character data
in elements or attribute values. You just can't use it in XML names.
So by using latin 1 you don't restrict the characters you can use in
data,  But you do restrict the names you can use
for elements and attributes to just using latin 1 characters.

so <xsl:variable name="x" select="'&#xA9;'"/> defines $x to be the
_single_ character (string-length($x) is 1)

David


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