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Please use this identifier to cite or link to this item:
http://hdl.handle.net/2451/14497
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| Title: | ASSESSING THE TEMPORAL DIFFERENTIATION OF ATTRIBUTES AS AN
IMPLEMENTATION STRATEGY FOR A TEMPORALLY ORIENTED RELATIONAL DBMS |
| Authors: | Shiftan, Joseph |
| Issue Date: | Aug-1986 |
| Publisher: | Stern School of Business, New York University |
| Series/Report no.: | IS-87-62 |
| Abstract: | Temporally Oriented Databases (TODBs) are database systems in which both
historical and current data are accessed and treated with full symmetry.
The growing interest in such systems is manifested recently in a number
of research efforts focusing on a wide set of issues, ranging from the
study of abstract conceptual models to the practical implementation of
working systems. Attempts to implement TODBs have so far been at best
preliminary, characterized by an ad hoc flavor, or have had a very
limited scope. This dissertation research is an attempt to design a
general purpose relational Temporally-Oriented Database Management
System (TDMS), and examine the feasibility of its implementation along
current theoretical concepts. The users view data in a TDMS as a
temporally oriented, three dimensional cube; this is, in fact,
implemented as a two layered data structure. The implementation model
interrelates the external user view with an underlying functional view
of the data , and specifies on the translation between these layers. The
major principle in the implementation is the differentiation of
attributes according to their temporal variation . This research uses
this concept as an implementation strategy of TDMSs, and assesses this
approach for dealing with the following primary questions: efficient
ways to store and retrieve data, the integrity constraints needed to
maintain the database consistency and the definitions and
implementations of temporal operations in such systems. Further
validation of the model was achieved through the development of a TDMS
prototype. The prototype was developed using INGRES commands embedded in
PASCAL programs on VAX/VMS, and provides a test bed for further studies
of temporally oriented information systems. |
| URI: | http://hdl.handle.net/2451/14497 |
| Appears in Collections: | IOMS: Information Systems Working Papers
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