A parameter value must be passed by the immediately preceding template.
This is done by an xsl:with-param element as a child of xsl:apply-templates:
<xsl:apply-templates> <xsl:with-param name="name">value</xsl:with-param> </xsl:apply-templates>
The bindings are only in effect for one template application.
The value can also be specified by a 'select' attribute.
The previous slide's example's call:
<xsl:apply-templates select="element"> <xsl:with-param name="namespace">urn:publicid:IDN+...</xsl:with-param> </xsl:apply-templates>