The <xsl:otherwise> element is used within an <xsl:choose> instruction to indicate the action that should be taken when none of the <xsl:when> conditions is satisfied.
None.
<xsl:otherwise> <!-- Content: sequence-constructor --> </xsl:otherwise>
<xsl:otherwise> can appear only as a child of an <xsl:choose> element. If it is present at all, it must be the last child of the <xsl:choose> element, and it must not appear more than once.
None.
A sequence constructor.
The sequence constructor of the <xsl:otherwise> element is evaluated if (and only if) none of the <xsl:when> elements in the containing <xsl:choose> element evaluates to true.
See <xsl:choose> on page 236.
<xsl:choose> on page 236
<xsl:when> on page 487