Updating a view requires deriving a translation which converts an update on a view into
updates on underlying relations. We present a pragmatic approach that uses syntactic as
well as semantic knowledge to decide an appropriate translation. The semantic knowledge
belongs to database and application domains and is collected at view definition time as well
as at view update time. We present a rule-based approach that is applicable to simple and
nested relational views defined using operations such as set difference, union, intersection …