Collection restricted to single value using form.singlevalue. This is ony a UI trick, if one loads or sends two or more items the standard collection UI is used Required [element], Multiple Occurrence, with Simple Type [inline-Form-Sub1] localName is [Sub1] without namespace Optional [element], Multiple Occurrence, with Simple Type [inline-Form-Sub1Opt] localName is [Sub1Opt] without namespace Collection restricted to single value using form.singlevalue. This is ony a UI trick, if one loads or sends two or more items the standard collection UI is used