Authors: Seung-Kyum Kim, Sharma Chakravarthy
Tags: 1993, conceptual modeling
In this paper we present newly elaborated time concepts for precise and lossless information preservation in temporal databases. First we introduce notions of temporal validity and interpretation-based validity, which help us correctly understand various time concepts introduced earlier for temporal databases. We, then, discuss the problem of preserving multiple past states of a temporal database and argue that three time concepts, valid time, transaction time, and event time are needed to attain the preservation. Lastly a simple and effective representation of temporal information with two-dimensional time is introduced.Read the full paper here: https://link.springer.com/chapter/10.1007/BFb0024389
