xsl:fallback
<xsl:fallback> <! -- template -- > </xsl:fallback>
The xsl:fallback
instruction normally appears as a child of an
extension element. If the processor does not recognize the
extension element, then it instantiates the contents of all the
element's xsl:fallback
children
in order. If the processor does recognize the element in which the
xsl:fallback
element appears,
then the contents of the xsl:fallback
element will not be
output.