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I am completely new to JSF, and just attempting a proof of concept to decide whether it will be useful for a project. My POC simply consists of a single page, with a table, containing some data. The number of columns (as well as the number of rows) is dynamic, loaded from a database before the page is rendered. With the following, I get two static columns with the appropriate number of rows, as I'd expect: <h:dataTable id="data" value="#{viewDataBean.dataRows}" var="row"> <h:column> <f:facet name="header"> <h:outputText value="Col 1"/> </f:facet> <h:outputText value="#{row.values[0].value}"/> </h:column> <h:column> <f:facet name="header"> <h:outputText value="Col 2"/> </f:facet> <h:outputText value="#{row.values[1].value}"/> </h:column> </h:dataTable> What I wanted to do was to add a <c:forEach...> around a single set of <h:column>...</h:column> tags, to iterate over the number of columns, but that didn't work - I tried a variety of combinations, but I was expecting something like this to work: <h:dataTable id="data" value="#{viewDataBean.dataRows}" var="row"> <c:forEach items="#{row.values}" var="val"> <h:column> <f:facet name="header"> <h:outputText value="Col 1"/> </f:facet> <h:outputText value="#{val.value}"/> </h:column> </c:forEach> </h:dataTable> From Googling, I've read various vague comments like 'that's not the way to do it', but I haven't been able to find any particularly compelling examples of the right way. Someone mentioned building the DataTable in the backing bean, but the only example of that I could find was <a href=

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