BIB-VERSION:: CS-TR-v2.0
          ID:: STAN//CS-TR-90-1304
       ENTRY:: September 06, 1994
ORGANIZATION:: Stanford University, Department of Computer Science
       TITLE:: A model of object-identities and values
        TYPE:: Technical Report
      AUTHOR:: Matsushima, Toshiyuki
      AUTHOR:: Wiederhold, Gio
        DATE:: February 1990
       PAGES:: 66
    ABSTRACT:: An algebraic formalization of the object-orlented data model
               is proposed. The formalism reveals that the semantics of the
               object-oriented model consists of two portions. One is
               expressed by an algebraic construct, which has essentially a
               value-oriented semantics. The other is expressed by
               object-identities, which characterize the essential
               difference of the object-oriented model and value-oriented
               models, such as the relational model and the logical database
               model. These two portions are integrated by a simple
               commutativity of modeling functions. The formalism includes
               the expression of integrity constraints in its construct,
               which provides the natural integration of the logical
               database model and the object-oriented database model.
       NOTES:: [Adminitrivia V1/RAM/19940906]
         END:: STAN//CS-TR-90-1304