UML, include, extend relationship - Stack Overflow
The key to Include and extend use case relationships is to realize that, common with the rest of UML, the dotted arrow between use cases is a dependency. When it comes to drawing use case diagrams one area many struggles with is showing various relationships in use case diagrams. This article will look into various use case diagram relationships in detail and explain them using examples. To get a deeper understanding of use cases. Limerence is a state of mind which results from a romantic attraction to another person and typically includes obsessive thoughts and fantasies and a desire to form or maintain a relationship with the object of love and have one's feelings reciprocated. However, in common speech, infatuation includes aspects of immaturity and.
This may include a tendency to devise, fabricate, or invent "reasonable" explanations for why neutral actions are a sign of hidden passion in the limerent object. A person experiencing limerence has a general intensity of feeling that leaves other concerns in the background. In their thoughts, such a person tends to emphasize what is admirable in the limerent object and to avoid any negative or problematic attributes. Intrusive thinking and fantasy[ edit ] During the height of limerence, thoughts of the limerent object or person are at once persistent, involuntary and intrusive.
Such 'intrusive thoughts about the LO This may be caused by low serotonin levels in the brain, comparable to those of people with obsessive—compulsive disorder. If a certain thought has no previous connection with the limerent object, immediately one is made. Limerent fantasy is unsatisfactory unless rooted in reality,  because the fantasizer may want the fantasy to seem realistic and somewhat possible.
UML Use Case "extend" and "include" relationships
At their most severe, intrusive limerent thoughts can occupy an individual's waking hours completely, resulting—like severe addiction—in significant or complete disruption of the limerent's normal interests and activities, including work and family.
For serial limerents, this can result in debilitating, lifelong underachievement in school, work, and family life. Fantasies that are concerned with far-fetched ideas are usually dropped by the fantasizer. This form predominates when what is viewed as evidence of possible reciprocation can be re-experienced a kind of selective or revisionist history. Otherwise, the long fantasy is anticipatory; it begins in the everyday world and climaxes at the attainment of the limerent goal.
A limerent fantasy can also involve an unusual, often tragic, event. The long fantasies form bridges between the limerent's ordinary life and that intensely desired ecstatic moment. The duration and complexity of a fantasy depend on the availability of time and freedom from distractions. The bliss of the imagined moment of consummation is greater when events imagined to precede it are possible though they often represent grave departures from the probable.
UML Use Case "extend" and "include" relationships | jingle-bells.infoflohner
Not always is it entirely pleasant, and when rejection seems likely the thoughts focus on despair, sometimes to the point of suicide. The pleasantness or unpleasantness of the state seems almost unrelated to the intensity of the reaction.
Although the direction of feeling, i. Fantasies are occasionally dreamed by the one experiencing limerence.
Dreams give out strong emotion and happiness when experienced, but often end with despair when the subject awakens. Dreams can reawaken strong feelings toward the limerent object after the feelings have declined.
Fear of rejection[ edit ] Along with an emphasis on the perceived exceptional qualities, and devotion to them, there is abundant doubt that the feelings are reciprocated: Considerable self-doubt is encountered, leading to "personal incapacitation expressed through unsettling timidity in the presence of the person",  something which causes misery and galvanizes desire.Use Cases - Includes and Extends
In most cases, what destroys limerence is a suitably long period of time without reciprocation. Although it appears that limerence advances with adversity, personal discomfort may foul it. This discomfort results from a fear of the limerent object's opinions. Hope[ edit ] Limerence develops and is sustained when there is a certain balance of hope and uncertainty.
The basis for limerent hope is not in objective reality but in reality as it is perceived.
Limerence - Wikipedia
The inclination is to sift through nuances of speech and subtleties of behavior for evidence of limerent hope. Modelling the whole system will lead to a lot of work that nobody will ever look at and which will soon again be out of date.
So I'm currently creating an UML Use case diagram to describe the basic features of my application I'm planning to develop and it always happens again to me that I come to the point where I have to search the web about the details regarding the "extend" and "include" relationships.
Just out of the head it seems to be clear: But still there are these doubts This behavior is modeled with a base use case called CheckOrderStatus that has an inclusion use case called LogIn. The LogIn use case is a separate inclusion use case because it contains behaviors that several other use cases in the system use. An include relationship points from the CheckOrderStatus use case to the LogIn use case to indicate that the CheckOrderStatus use case always includes the behaviors in the LogIn use case.
The "extend" relationship is explained as follows: You are developing an e-commerce system in which you have a base use case called Place Online Order that has an extending use case called Specify Shipping Instructions. An extend relationship points from the Specify Shipping Instructions use case to the Place Online Order use case to indicate that the behaviors in the Specify Shipping Instructions use case are optional and only occur in certain circumstances.
So the key point in the extends relationship is "optional"! It adds further functionality to the base use case which may be restricted by constraints.