Defines an output template. Templates that begin <xsl:template match="x" define a transformation for a given element. Templates that begin <xsl:template name="x" define a set of output elements that are processed whenever the template is invoked by name. All <xsl:template> elements must have either the match or the name attribute defined. Although not common, it is also possible to create <xsl:template> elements that have both a match and a name.