Despite the considerable activity in the area of temporal databases, no temporal database model has achieved the same level of acceptance as Codds relational model in the world of conventional databases. Existing temporal database models differ significantly in the way they incorporate temporal components as well as in the algebras they define. The research reported in this book combines the features of previous nested and temporal models to develop a new integrated Temporal Nested Model (TNM), an attribute timestamping heterogeneous model supporting temporal elements as distinct...