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Leon Starr edited this page Feb 3, 2023 · 5 revisions

R506 / Generalization

Event Response is a Transition or Non Transition

Shlaer-Mellor specifies three possible responses to an Event. These are:

  • Take a Transition
  • Ignore the Event — remain in the current State
  • Can’t Happen — raise an exception and defer to the MX (model execution) domain

In all cases, the Event occurrence is discarded. The 'Take a Transition' response is factored out as a Transition since it has a relationship with a target State.

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Content Overview

Class Metamodel

Class and State Metamodel Document Register

Domain Subsystem

Class and Attribute Subsystem

Relationship Subsystem

Formalization Subsystem

External Entity Subsystem

State Metamodel

State Subsystem

Event Subsystem

Technical Notes

1 Synchronous and Asynchronous Creation States

Action Metamodel

Action Subsystem Document Register

Subsystems

Action Subsystem

Activity Subsystem

Attribute Access Subsystem

Computation Subsystem

Conditional Logic Subsystem

Create Delete Subsystem

Flow Subsystem

Iteration Subsystem

Navigation Subsystem

Relational Action Subsystem

Select Action Subsystem

Set Action Subsystem

Signal Subsystem

Type Subsystem

Technical Notes

1 Reading and Updating Attributes

2 Relationship Navigation

3 Data Flow Semantics

4 Reference Actions

5 Instance Creation

6 Activities

7 Signal Action

8 Signal Action to and from Metamodel Exploration

9 Select Action

10 Loose Ends Inventory

11 Parse Experiments

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