What does f:param do?

Hi all,
What exactly <f:param> does. Is there any alternative in HTML,JavaScript or JSP for this?
If <f:param> sets a value for a key, JSTL's <c:out value="${key}"> does the same. Am I right?
Can we compare <f:param with <c:out>.
Help me.

<h:outputText > is the equivalent of <c:out>
<f:param> sets a request parameter, here is an example
<h:commandLink actionListener="#{companyListBean.sortByColumn}">
<h:outputText value="#{companyListBean.companyColumnTitle}" escape="false" />
<f:param name="column" value="name" />
</h:commandLink>in your managed bean, you can retrieve it with
String columnName = (String)facesContext.getExternalContext().getRequestParameterMap().get("column");Frederic

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What does f:param do?

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