Design elements - Sequence diagram

The vector stencils library "Sequence diagram" contains 32 SysML symbols. Use it to design your sequence diagrams using ConceptDraw PRO diagramming and vector drawing software. "A sequence diagram shows, as parallel vertical lines (lifelines), different processes or objects that live simultaneously, and, as horizontal arrows, the messages exchanged between them, in the order in which they occur. This allows the specification of simple runtime scenarios in a graphical manner. ... If the lifeline is that of an object, it demonstrates a role. Leaving the instance name blank can represent anonymous and unnamed instances. Messages, written with horizontal arrows with the message name written above them, display interaction. Solid arrow heads represent synchronous calls, open arrow heads represent asynchronous messages, and dashed lines represent reply messages. If a caller sends a synchronous message, it must wait until the message is done, such as invoking a subroutine. If a caller sends an asynchronous message, it can continue processing and doesn’t have to wait for a response. Asynchronous calls are present in multithreaded applications and in message-oriented middleware. Activation boxes, or method-call boxes, are opaque rectangles drawn on top of lifelines to represent that processes are being performed in response to the message (ExecutionSpecifications in UML). Objects calling methods on themselves use messages and add new activation boxes on top of any others to indicate a further level of processing. When an object is destroyed (removed from memory), an X is drawn on top of the lifeline, and the dashed line ceases to be drawn below it (this is not the case in the first example though). It should be the result of a message, either from the object itself, or another. A message sent from outside the diagram can be represented by a message originating from a filled-in circle (found message in UML) or from a border of the sequence diagram (gate in UML)." [Sequence diagram. Wikipedia] The SysML shapes example "Design elements - Sequence diagram" is included in the SysML solution from the Software Development area of ConceptDraw Solution Park.
SysML sequence diagram symbols
SysML sequence diagram symbols, weak sequencing combined fragment, interaction operator seq, time observation, time constraint, synchronous call, message, strict sequencing combined fragment, interaction operator strict, sequence diagram, reply message, parallel combined fragment, interaction operator par, option combined fragment, interaction operator opt, negative combined fragment, interaction operator neg, message, lost message, loop combined fragment, interaction operator loop, lifeline, interaction use, ignore combined fragment, interaction operator ignore, general ordering, found message, execution specification, duration observation, duration constraint, destruction event, critical region combined fragment, interaction operator critical, creation event, coregion, continuation, state invariant, consider combined fragment, interaction operator consider, combined fragment, break combined fragment, interaction operator break, asynchronous signal, message, assertion combined fragment, interaction operator assert, alternative combined fragment, interaction operator alt, alternatives,