OR1032 - modelint/shlaer-mellor-metamodel GitHub Wiki
OR1032 / Ordinal
Sorting Attribute sorts before/after Sorting Attribute
Here we establish the order in which Attribute values are applied to sort an instance set.
Here is an instance set sorted differently based on the order in which the Sorting Attributes are applied:
| ID | Altitude | Heading | Airspeed |
|---|---|---|---|
| N17394Q | 10000 | 270 | 93 |
| N32189Z | 8500 | 121 | 152 |
| N40572M | 10000 | 270 | 140 |
| N96429B | 8500 | 80 | 94 |
(^+ = sort ascending in the action language below)
Aircraft( ^+Altitude, ^-Airspeed )
N96429B, N32189Z, N40572M, N17394Q
Aircraft( ^-Airspeed, ^+Altitude )
N32189Z, N40572M, N96429B, N17394Q
Formalization
Sort order after : ascending
Ranking attribute : Sort order
Partial ordering by : Class, Iteration action, Activity, Domain