Conclusion Temporal relational database (25 years) Temporal OO database (15 years) Real-time databases (since 1986) Accomplishments – No data model is good enough, need suite of models – Real-time and temporal people are interacting and starting to use the same language Needs – Real-time models that capture semantic knowledge – Too many temporal data models, not many real-time models and no real-time query language – Performance is still a challenge
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