xsl:copy-of
<xsl:copy-of
select = "expression" />The xsl:copy-of
instruction inserts whatever is identified by the
select attribute into the
output document. This instruction copies the specific nodes
identified by the expression, as well as all those nodes'
children, attributes, namespaces, and descendants. This is how it
differs from xsl:copy. If the
expression selects something other than a node-set, such as a
number, then the expression is converted to its string-value, and
the string is output.