A data model is independent of hardware or software constraints. Rather than try to. represent the data as a database would see it, the data model focuses on representing the. data as the user sees it in the real world.
International AIED Society. AIED is an interdisciplinary community at the frontiers of the fields of computer science, education and psychology. It promotes rigorous research and development of interactive and adaptive learning environments for learners of all ages, across all domains.
What does QED mean? Q.E.D. stands for Quod Erat Demonstrandum, a Latin translation of the phrase $\ddot{o} \pi \varepsilon \rho \quad \ddot{\varepsilon} \delta \varepsilon \iota \quad \delta \varepsilon \hat{\iota} \xi \alpha \iota$ with which Euclid concluded most of his proofs. It means what was to be proved and signifies the proof has been concluded.