BRAIN Journal-Two new software behavioral design patterns: Obligation Link and History Reminder-Figure 2. The class diagram of the "Obligation Link" design pattern

Here is the structure of the “Obligation Link” design pattern described through another UML concept, called class diagrams. Contrary to the sequence diagrams which describe the behaviour, class diagrams specify static structural information about a program. The important information for a class, such as its attribute, operation, etc, along with relationship between classes can be specified using a class diagram