The TEMPIS Project: Current Status,

reportActive / Technical Report | Accession Number: ADA188963 | Open PDF

Abstract:

The goal of this project is a formalization and implementation of a temporal database management system TDBMS. In the past three years, we have concentrated on the TQuel language, its definition, formalization, and initial implementation. Soon after starting the project, we determined that there are many types of time to be stored in a database, and we precisely characterized what we view to be the three primary types. The first kind of time, termed valid time, involves recording the history of the enterprise being modelled in the database. The second kind of time, termed transaction time, involves recording the history of updates to the database. The third, user-defined time, is not interpreted by the database management system, and is easy to support. Supporting transaction time was added to our study, increasing the number of subtasks to 24.

Author(s):
Snodgrass, Richard
Author Organization(s):
NORTH CAROLINA UNIV AT CHAPEL HILL DEPT OF COMPUTER SCIENCE
Pagination:
0009

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
UNC-TEMPIS-15
Contract/Grant Number(s):
N00014-86-K-0680, $NSF-DCR84-02339
 Subject Terms
Joint Capability Areas:
JCA_1_Force Support; JCA_1.2_Force Preparation; JCA_1.2.3_Educating; JCA_6.2.3_Core Enterprise Services; JCA_6_Net Centric; JCA_6.2.1_Information Sharing; JCA_6.2.2_Computing Services; JCA_5_Command and Control; JCA_6.2_Enterprise Services
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*DATA MANAGEMENT, DATA BASES, DATA PROCESSING SECURITY
Field(s)/Group(s):
Computer Programming and Software
Keyword(s):
Tempis Project, *Temporal database management systems
Report Date:
1987 Jun 19