Там тег <jsp:param>
предназначен для.
Например,
<jsp:include page="/WEB-INF/include.jsp">
<jsp:param name="position" value="top" />
</jsp:include>
...
<jsp:include page="/WEB-INF/include.jsp">
<jsp:param name="position" value="bottom" />
</jsp:include>
В приведенном выше примере значение доступно ${param.position}
внутри включаемого JSP:
<c:if test="${param.position == 'top'}">
This is a top include.
</c:if>
<c:if test="${param.position == 'bottom'}">
This is a bottom include.
</c:if>