Use the choose JSP tag to select at most one enclosed branch of when tags.
Include one or more when tags and a final otherwise tag within the scope of the choose tag.
The choose tag has no attributes. For example:
<pega:choose>
<pega:when zzzz1 >
<!-- HTML or XML code to execute for first when -->
</pega:when>
<pega:when zzzz2 >
<!-- HTML or XML code to execute for second when -->
</pega:when>
<pega:otherwise>
<!-- selected if no previous when tag evaluates to true -->
</pega:otherwise>
</pega:choose>
where zzzz1 and zzzz2 are a name=, test=, or other valid set of when JSP tag attributes.
You can nest when tags within when tags. You can't use JSP tags other than when and otherwise within the scope of a choose tag.