thanks fernando, got it now - (a single row that is :) I did not know that Set could not be used: I had read this in the seam documentation: | @DataModel | | @DataModel("variableName") | | Exposes an attribute of type List, Map, Set or Object[] as a JSF DataModel into the scope of the owning component (or the EVENT scope if the owning component is STATELESS). In the case of Map, each row of the DataModel is a Map.Entry. | | . . . | | | And infered (wrongly) that Set was also supported directly. | | | | So, it should probably work if I obtain the Set from the parent bean (where I 'out' it) and 'out' the detail Set as a DataModel using Seam Annotation. | | | | Am I on the right track? | | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4033414#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...