Just for completeness and those unaware XSL 1 has choose for multiple conditions.
<xsl:choose>
<xsl:when test="expression">
... some output ...
</xsl:when>
<xsl:when test="another-expression">
... some output ...
</xsl:when>
<xsl:otherwise>
... some output ....
</xsl:otherwise>
</xsl:choose>