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The above model makes a small number of changes from the model that enhanced abstractions for lines. It converts the line representing the interaction, orders, into a rectangle representing the activity, formalise orders. The rectangle, orders, in the lower level of the model, is renamed as formalise orders. The rectangle, formalise orders, together with its interactions, is added as a component activity in the left hand middle diagram. The line, orders, in the top level diagram and in the middle level diagrams is relabelled as formal orders.
last revision: 21st June 1997