This research takes the view that the modelling of temporal data is a fundamental step towards the solution of capturing semantics of time. The problems inherent in the modelling of time are not unique to database processing. The representation of temporal knowledge and temporal reasoning arises in a wide range of other disciplines. In this paper an account is given of a technique for modelling the semantics of temporal data and its associated normalization method. It discusses the techniques of processing temporal data by employing a Time Sequence (TS) data model. It shows a number of different strategies which are used to classify different data properties of temporal data, and it goes on to develop the model of temporal data and addresses issues of temporal data application design by introducing the concept of temporal data normalisation.