<xsl:attribute-set>

The <xsl:attribute-set> element gives a name to a collection of attribute/value pairs.

<xsl:attribute-set 
  name = qname 
  use-attribute-sets = qnames>
  <!-- Content: xsl:attribute* -->
</xsl:attribute-set> 
name

The attribute set name

use-attribute-sets

Uses another collection of attributes as the default set for this attribute set