<xsl:with-param>

Used inside a <xsl:call-template>, a <xsl:with-param> specifies the value for parameters (<xsl:param>) within the called template.

<xsl:with-param 
  name = qname 
  select = expression>
  <!-- Content: template -->
</xsl:with-param> 
name

The name of the parameter

select

Selects the parameter content, if present, otherwise the element content is used