XSL translation with if/then statement

[lassehammer]

I have an XML file containing 5 orders. 4 of the orders have a billing address that is the shipping address and no shipping address fields. The 5th order have both a billing address and a seperate Shipping address. How do I write the XSL so that the shipping address always should be used if present?
Thanks

 

[jel]

Use <xsl:choose>
For example:
<xsl:template match="order">
<!-- anything about the order -->
<xsl:value-of select="lastname" />
<xsl:choose>
<xsl:when test="shipping_adress/zip!=''">
<!-- print shipping adress -->
<xsl:value-of select="shipping_adress/zip" />
</xsl:when>
<xsltherwise>
<!-- print regular adress -->
<xsl:value-of select="adress/zip" />
</xsltherwise>
</xsl:choose>
</xsl:template>