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What information can be shown by a message in sequence diagrams?
Sequence diagrams depict workflow or activity over time using Messages passed from element to element. In the software model. These Messages correspond to Class operations and behavior.
How do you create an IF ELSE condition in a sequence diagram?
Selection and Loops in a Combination
- if -> (opt) [condition]
- if/else -> (alt) [condition], separated by horizontal dashed line.
- loop -> (loop) [condition or items to loop over]
What does a message mean in sequence diagram?
Messages – Communication between objects is depicted using messages. The messages appear in a sequential order on the lifeline. We represent messages using arrows. Lifelines and messages form the core of a sequence diagram. Asynchronous Messages – An asynchronous message does not wait for a reply from the receiver.
How is the message shown in UML sequence diagram?
The message specifies not only the kind of communication, but also the sender and the receiver. Sender and receiver are normally two occurrence specifications (points at the ends of messages). A message is shown as a line from the sender message end to the receiver message end.
Which is the best description of a sequence diagram?
Sequence diagram describes an interaction by focusing on the sequence of messages that are exchanged, along with their corresponding occurrence specifications on the lifelines.
How are sender and receiver messages shown in UML?
Sender and receiver are normally two occurrence specifications (points at the ends of messages). A message is shown as a line from the sender message end to the receiver message end. The line must be such that every line fragment is either horizontal or downwards when traversed from send event to receive event.
How are interaction fragments used in sequence diagrams?
Interaction use is an interaction fragment which allows to use (or call) another interaction. Large and complex sequence diagrams could be simplified with interaction uses. It is also common to reuse some interaction between several other interactions. Referenced interaction has formal gates.