43
Table 2.3
#
Name
Symbol
Description
1
Actor
Everything that interact with system for some
purposes
2
Object
Represents classes used in Class Diagram
3
Lifelines
Indicating active sequence
4
Activation
Bars
Indicating when participant is active in
interacting. This symbol is placed on the
lifelines
5
Asynchronous
message
Delivering method from every object. It is
used when the sender waits until the receiver
has finished processing the message, only then
does the caller continue (i.e. a blocking call)
6
Synchronous
message
Delivering method from every object. With an
asynchronous message, the sender does not
wait for the receiver to finish processing the
message, it continues immediately
7
Self-call
Send self-message
8
Return
Answer of message sent by an object
9
Frame
Marking the special area in which looping,
selection, etc., occur
Object
loop
 |