A Calculus for Complex Objects

  title={A Calculus for Complex Objects},
  author={François Bancilhon and Setrag Khoshafian},
The relational model is now widely accepted as a model to represent various forms of data. However, one of its limitations, namely the fact that it is restricted to first normal form (flat) relations, has proven to be a problem in many applications (CAD being one example of such an area). Various attempts have been made recently at relaxing this restriction. Most of these attempts define the concept of a non normalized (or nested) relation and introduce a set of operations (algebra) or a… CONTINUE READING