Here is my xhtml.

<h:form id="ManageForm">
 <rich:dataTable value="#{manageExternalLinks.baseProfile.baseProfileGates}" var="baseProfileGate" width="750px" bgcolor="blue">
 <f:facet name="header">
 <rich:columnGroup>
 <rich:column colspan="4">
 <h:outputText value="#{manageExternalLinks.baseProfile.name} - #{manageExternalLinks.baseProfile.version}" />
 </rich:column>
 </rich:columnGroup>
 </f:facet>
 <rich:column colspan="2">
 <f:facet name="header">Gate Name</f:facet>
 <h:outputText value="#{baseProfileGate.gate.name}" styleClass="text"/>
 </rich:column>
 <rich:column>
 <f:facet name="header">External URL</f:facet>
 <h:inputText value="#{baseProfileGate.externalUrl}" styleClass="text">
 <a4j:support event="onkeyup" reRender="GateUrl" ajaxSingle="true" limitToList="true" requestDelay="500"/>
 </h:inputText><br/>
 <h:outputLink id="GateUrl" value="#{baseProfileGate.externalUrl}" target="_blank">#{baseProfileGate.externalUrl}</h:outputLink>
 </rich:column>
 <rich:column>
 <f:facet name="header">Intent</f:facet>
 <h:inputTextarea value="#{baseProfileGate.description}" styleClass="textArea"/>
 </rich:column>

 <rich:subTable value="#{baseProfileGate.productTemplates}" var="productTemplate">
 <rich:column>
 <!--<f:facet name="header"><rich:spacer /></f:facet> -->
 <rich:spacer/>
 <f:facet name="footer"><rich:spacer /></f:facet>
 </rich:column>
 <rich:column>
 <!--<f:facet name="header">Product Name</f:facet>-->
 <h:inputText value="#{productTemplate.name}" styleClass="text"/>
 <f:facet name="footer"><rich:spacer /></f:facet>
 </rich:column>
 <rich:column>
 <!--<f:facet name="header">External URL</f:facet>-->
 <h:inputText value="#{productTemplate.externalUrl}" styleClass="text">
 <a4j:support event="onkeyup" reRender="ProductUrl" ajaxSingle="true" limitToList="true" requestDelay="500"/>
 </h:inputText><br/>
 <h:outputLink id="ProductUrl" value="#{productTemplate.externalUrl}">#{productTemplate.externalUrl}</h:outputLink>
 <f:facet name="footer"><rich:spacer /></f:facet>
 </rich:column>
 <rich:column>
 <!--<f:facet name="header">Intent</f:facet>-->
 <h:inputTextarea value="#{productTemplate.description}"/>
 <f:facet name="footer"><rich:spacer /></f:facet>
 </rich:column>
 </rich:subTable>
 </rich:dataTable>
 <h:commandButton action="#{manageExternalLinks.submitChanges}" value="Submit" />
 </h:form>

@Stateful
@Name("manageExternalLinks")
public class ManageExternalLinksAction implements ManageExternalLinks
 {
 @PersistenceContext(type = PersistenceContextType.EXTENDED)
 private EntityManager em;

 private BaseProfile baseProfile;

 public BaseProfile getBaseProfile()
 {
 return baseProfile;
 }

 public void setBaseProfile(BaseProfile baseProfile)
 {
 this.baseProfile = baseProfile;
 }

 @End
 public void submitChanges()
 {
 this.baseProfile = em.merge(baseProfile);
 }

 @Factory(value = "allBaseProfiles")
 public List<BaseProfile> loadBaseProfiles()
 {
 return em.createQuery("Select bp from BaseProfile bp").getResultList();
 }

 @Destroy
 @Remove
 public void destroy()
 {
 }
 }