Managing data freshness with MARTE in real-time databases

A real-time database usually requires maintaining a great quantities of temporal data items whose values remain valid only within their validity interval. Each data item in the database models the current status of a physical real-world entity. The freshness of these temporal data items is maintained by update transactions that need to be executed within their deadlines. In this paper, we propose a model-based data freshness management approach consisting of a model for expressing data freshness requirements. This approach is based on the TIME package of MARTE (Modeling and Analysis of Real-Time and Embedded systems) profile which provides capabilities of modeling concepts to deal with real-time and embedded systems features.