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Illustrate the collaboration and relationship diagram
A collaboration is the society of interfaces, classes and other elements which work together to provide some cooperative behaviour which is bigger than the sum of its parts.
A relationship is a connection between things. In object models, common types of relationships are dependency, inheritance, containment, aggregation, association, generalisation and realisation. The notation for relationship among use cases is shown as:
Figure: Relationship between different use cases
what is union compatable?
Depending upon the rules we have found, we can classify the locks into two types. Shared Lock: A transaction might be acquiring shared lock on a data item in order to read it
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