The xsl:choose statement is similar to the xsl:if construct. You can use the xsl:choose XSLT statement if there are multiple conditions to evaluate.

Figure 41-14 shows the XSLT Map Editor containing sample source and target schemas. The source schema has an xsd:choice construct defined. The source schema can contain either an HQAccount or a BranchAccount node, but not both. The target schema has a BilledToAccount/AccountNumber node that must be defined.

If the HQAccount node exists, you must copy its AccountNumber to BilledToAccount/AccountNumber in the target. If the HQAccount node does not exist, you must copy the AccountNumber from the BranchAccount node. You can use the xsl:choose statement to accomplish this task.