Hi This is a message on behalf of Jakob Korherr: ".....Working on this issue I found out that the hidden property can not be added for composite:actionSource, composite:editableValueHolder and composite:valueHolder, because those tags do not create a java.beans.FeatureDescriptor, but a javax.faces.view.AttachedObjectTarget and this one does not include a hidden property. Thus this clearly is a spec issue...." On myfaces we don't see how this attribute should work. The description says: "....The "hidden" flag is used to identify features that are intended only for tool use, and which should not be exposed to humans....." It has sense on composite:attribute, composite:facet and composite:interface, but it doesn't on composite:actionSource, composite:editableValueHolder and composite:valueHolder. regards, Leonardo Uribe