POSC Specifications: Epicentre Version 3.0 Logical Data Model

COMMON_ACTIVITY_COMPOSITION (Local) (C059, C123, C151)

(Rules) (Express)

An association indicating that activities characterized (via classification or kind of class) by an activity class may reasonably be expected to have a subactivity that is characterized by another activity class. This is not declaring the composition of a class. Rather it is declaring an expected composition of an activity that is a member of the class. A decomposition is not required but if a decomposition is defined then this is the expected decomposition. For example, a class of 'start car' might have three common compositions of class 'insert key', 'turn key' and 'release key' respectively. Thus, an activity which is characterized as 'start car' could be expected to have three subactivities which are respectively characterized as 'insert key', 'turn key' and 'release key'. This composition is the nominal composition of the actual activity (what is expected), but the actual activity composition should describe what was actually done rather than what was intended.


Local rules:

Supertype path(s):

Entity projects as table COMMON_ACTIVITY_COMPOSITION.

Referenced in Diagrams:


Generated on Tue Jul 10 15:39:57 2001
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