The TEMPIS Project: Current Status,

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.

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Document Details

Document Type
Technical Report
Publication Date
Jun 19, 1987
Accession Number
ADA188963

Entities

People

  • Richard Snodgrass

Organizations

  • University of North Carolina at Chapel Hill

Tags

DTIC Thesaurus Topics

  • Complex Systems
  • Computer Science
  • Computers
  • Database Management Systems
  • Databases
  • Engineering
  • Graphical User Interface
  • Language
  • Military Research
  • Monitoring
  • North Carolina
  • Optical Storage
  • Optimization
  • Semantics
  • Technical Information Centers
  • Universities
  • User Interface

Fields of Study

  • Computer science

Readers

  • Database Systems and Applications
  • Mathematical Modeling and Probability Theory.