A link is a physical or conceptual connection between object instances. In
OMT link is represented by a line labeled with its name as shown in Figure
OMT link is represented by a line labeled with its name as shown in Figure
association
An association describes a group of links with common structure and common
semantics between two or more classes. Association is represented by a line
labeled with the association name
Associations can have role names associated each class connection.Associations can also have qualifiers on the class connections. qualifiers are special attributes that reduce the effective multiplicity
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