General Sequence Diagram Icons
Create a Life Line - A vertical line representing an activity in the model. The activity label displays at the top. Name a Life Line - Names an existing lifeline. Create External Life Line - A dashed vertical line, representing an external activity that may or may not be in the model. Create a Partition Line and Text - A horizontal line, distinguishing between scenarios. Create Simple Message - An arrow from one activity (source) to another (target). Label a Message - A horizontal arrow, representing interaction between activities. A message label consists of an event expression. Create Timing Constraint - A vertical line connecting two messages, representing a timing constraint specification between the two messages. If one of the messages is moved, the timing constraint line is stretched or compressed accordingly. Create Timing Constraint Text - A free text note that is attached to a specific timing constraint. Create Order Insignificant Line - A vertical line connecting two messages, signifying that the designated messages can occur in any order. Create Message Note - A free text note that is associated with a specific timing constraint. By default the note is displayed on the left side of the sequence diagram, horizontally aligned with the timing constraint.The name assigned to a sequence diagram graphic element can be a path name, designating the exact location in the model represented by the sequence diagram element. A path name has the following format:
Chart Name:Activity[ .Activity]*
Create a Reference SD - A thick horizontal, shaded line extending the full width across all lifelines, representing a separate sequence diagram. Execution of activities below the referenced sequenced diagram line continues only after all the activities above the line are completed.