container/tester/web/SSIConditional01.shtml

Before if block.
<!--#set var="test" value="value1" -->
<!--#if expr="\"$test\" = \"value1\"" -->
test = value1
<!--#elif expr="\"$test\" = \"value2\"" -->
test = value2
<!--#else -->
test = neither value1 or value2
<!--#endif -->
After if block.