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2. Domain Entities 2.3. Parts2.3.1. Atomic and Composite Parts2.3.1.1. An Essay on Abstraction61• And then that, “lifted” transport domain– was not modelled as a graph,– as one might conventionally expect it,– but, as we shall see more of,– as a set of hubs and a set of links– related by a mereology !• I shall not here attempt to give general guide lines– for abstraction,– for where “to start looking”,– etcetera,A Precursor for Requirements Engineering 61 c○ Dines Bjørner 2012, DTU Informatics, Techn.Univ.of Denmark – July 20, 2012: 12:33
622. Domain Entities 2.3. Parts2.3.1. Atomic and Composite Parts2.3.1.1. An Essay on Abstraction• Instead we shall– advice the listener to∗ study existing domain descriptions and∗ otherwise, individually, or as a team of domain describers∗ experiment with abstraction levels and “starting points”.• As for abstraction level– you may think the one chosen for transport nets– to be too abstract — too many properties left out !– Well, as we shall soon see,∗ when introducing properties of parts,∗ these can, in most cases,cover the levels of details that you may be looking for.c○ Dines Bjørner 2012, DTU Informatics, Techn.Univ.of Denmark – July 20, 2012: 12:33 62 Domain Science & Engineering
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