WEEK 5 CS2002 Sequence Diagrams in UML

These flashcards cover key vocabulary and concepts related to sequence diagrams in UML, focusing on interactions, message types, and diagrammatic elements.

Sequence Diagram

A two-dimensional diagram that represents interactions between objects, with horizontal axis for interaction partners and vertical axis for chronological order.

Interaction Partners

Entities involved in a sequence of interactions, depicted as lifelines in a sequence diagram.

Lifeline

A representation of an interaction partner in a sequence diagram, consisting of a head (role name and class) and a vertical dashed line.

Synchronous Message

A message where the sender waits for a response before continuing.

Asynchronous Message

A message where the sender continues without waiting for a response.

Combined Fragments

Elements used to model various control structures in sequence diagrams, including conditions and loops.

alt Fragment

Used to model alternative sequences in interactions, similar to a switch statement in programming.

loop Fragment

A construct used to indicate that a sequence of events should be repeated under certain conditions.

break Fragment

A simple form of exception handling in sequence diagrams that interrupts the ongoing interactions based on a condition.

par Fragment

A fragment that allows for concurrent interactions without a specific chronological order among different operands.

Found Message

A message sent where the sender is unknown or not relevant.

Lost Message

A message received where the receiver is unknown or not relevant.

Execution Specification

A continuous bar in the sequence diagram that visualizes the period during which an interaction partner executes some behavior.

Message with Duration

A communication in a sequence diagram that expresses that some time elapses between sending and receiving a message.

Destruction Event

Indicates the time at which an interaction partner ceases to exist in a sequence diagram.

Response Message

A message that addresses a synchronous message, indicating feedback or output from a prior request.