The when tag acts as a single case clause for a containing choose tag. Within a choose tag's scope, the first when tag to test true will become the processing result of the entire choose tag.
|test||string||yes||An XPath expression. If the select attribute of the containing choose tag is specified, this expression value is compared to the value of that select expression. Otherwise, this XPath expression is evaluated as a boolean..|
<c:when test=“” >
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