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Software Design Center
HOW TO DRAW CATALYSIS DIAGRAMS (cont'd)
Type Model Notations
Type
A Type, similar to a class, is an abstraction of an object.
Learn how to create this symbol.
Associations
Associations represent pairs of inverse attributes. Draw associations by connecting Types.
Learn how to connect two Types.
Association
Directed Association
Non-Defined Association
Derived Association
Parameterized Association
Association ordered by Type x
Constant Association
Cardinality
Place cardinality notations near the ends of an association. These notations indicate the number of instances of one Type linked to one instance of the other Type. For example, one company can employ one or more employees.
One
Optional
Zero or more
Between m and n
Static Invariant
A static invariant is a Boolean expression that must be true for every permitted snapshot of a type diagram.
Complex model
A complex type model illustrates in detail any specification Types contained under the design Type.
Learn how to arrange multiple objects on the page.
Inheritance
As in other object-oriented methods, subtypes inherit specifications from supertypes.
Learn how to illustrate this relationship.
