Survey of Time-varying Data Models

Abstract

There are two types of data models: time-varying (temporal) data model and non-temporal data model. Data in the real-world exist in three (3) states: past, present, and future; the past state is refers to as history, current/present is the valid state, and the future is that which supposed to valid after the current state. Data assumes these states as time progresses. Non-temporal data model only represent present state of data. With the time-varying model, it is possible to represent these three states. In this paper, we carry out the review of the time-vary data model and proposed a temporal data model for nursing process.