XSL Concepts and Practical Use: XSL Element Summary

<xsl:copy>

<xsl:copy 
  use-attribute-sets = qnames>
  <!-- Content: template -->
</xsl:copy>

use-attribute-sets: Lists the names of attribute sets (<xsl:attribute-set>) to be copied into the result tree

The actual content of the <xsl:copy> element is copied literally into the result tree.