Meta model

As explained earlier, a script is a chronological sequence of steps that occur before, during and after the main criminal act. But do we mean by “a sequence of steps”?

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A sequence of states

A state describes a characteristic of someone or something at a point in time.

S₁: location: London; S₂: location: Paris; S₃: location: London

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A sequence of actions

The transition from one state to the next can be represented by an action or an activity:

A_1-2: I travel from London to Paris – A_2-3: I travel from Paris to London

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A sequence of states and actions

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A sequence of states, decisions and actions

A decision represents a mental commitment towards one action.

D_1-2: I decide to travel from London to Paris – D_2-3: I decide to travel from Paris to London

Once someone’s taken a decision, their mental state changes.

S_1-2: I have decided to travel from London to Paris – S_2-3: I have decided to travel from Paris to London