Thesis full text (PDF) - Politecnico di Milano

3.3.2.2 Remove property value for an instance
This pattern removes from the knowledge base the property value assigned to a class object. It
encompasses only the Remove Property Value management component, and therefore, there is
no need to involve the Complex Operation class since no automatic components interaction takes
place. The user submits the property value and the instance containing it and the component is
configured with: (i) a PropertyValueOfValue insertion condition to indicate the property value
specified by the first user input; and (ii) a PropertyValueOfInstance insertion condition to
remove the axiom indicating the previous property value assigned to the second user input.
3.4 Social Network Application
In our application we have proposed a social network application with recommendation feature
and also other features. In this application we have developed an automatic recommendation
system. This will recommend to the User about different interesting topics. If a User is a Group
Member he can get some recommendation from the system based on the other Group Members
interests. When a User browses interesting topics, he will get a recommendation about topics
based on his previous interests. We will see the details specification in the next section.
3.4.1 Use Cases of the Application
In this section, we have described the UML Use Case diagram for the social network application.
Here, a User or a Group Member is an Actor. Sometimes the system works as an Actor. A User
may be a Group member. But it is not necessary that every User has to be Group member.
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