Hi Jerome,
There is a programmatic way to get this: Call.getResourceRef().getQueryAsForm().get("key1")
I couldn't find any such method in b18 is it in b19? Only one that resembles is String get(int) If we need to attract some servlet developers later-on maybe it is wise to have a method like getParameter() this will help in transition from servlets to restlets. Tutorial needs an example too. Cheers Piyush