I did well with simple value services for single valueattribute with this code
IWDAttributeInfo attributeInfo =
ISimpleTypeModifiable countryType = attributeInfo.getModifiableSimpleType();
(* this is for only with single valueattribute)
But as per my requirement,i have to do this with valuenode inside it with value attribute ......
can anyone help the code for this ,itz vvvvvvv urgent for me.......