For reference: The code in Seam is in org.jboss.seam.pages.Param#getValueFromRequest() around lines 133 to 142 View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4058025#4058025 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4058025