SysML Activity Toolbox

SysML Activities

Activity

Define a SysML Block of executable behavior as a UML Activity.

Structured Activity

Define a SysML Block of executable behavior as a UML Structured
Activity.

Action

Declare a unit of execution in an Activity as a UML Action.

Action (call behavior)

Declare a unit of execution that calls another behavior.

Action (accept event)

Declare a unit of execution that accepts an event raised by the system.

Action (accept event timer)

Declare a unit of execution that accepts an event raised by a time epoch.

Action (send signal)

Declare a unit of execution that sends a signal as an event.

Partition

Create an Activity Partition to group execution elements together by the node responsible for their execution.

Control Operator

Control the execution of an Activity.

Parameter

Provide access to input and output objects within the Activity.

Parameter (optional)

Define a parameter whose contents are optional in the Activity's execution.

Parameter (probability)

Tag a parameter with probability of the likelihood of the parameter's use in the Activity.

Object Node

Declare a variable in the Activity, typed by a ValueType, DataType or Block.

Object Node (no buffer)

Declare an ObjectNode in an Activity which discards unconsumed tokens.

Object Node (overwrite)

Declare an ObjectNode in an Activity which overwrites tokens.

Central Buffer Node

Declare an ObjectNode that stores tokens for consumption throughout the Activity.

Decision

Create a branch of control in an Activity based on a decision.

Merge

Merge two or more Activity control branches.

Synch

Establish a rendezvous point for two or more Activity flows, in order to synchronize their execution in the Activity.

Initial

Declare the start of Activity's execution.

Final

Declare the end of an Activity's execution, and the termination of the Activity.

Flow Final

Declare the end of an Activity's execution path without terminating the Activity.

Region

Group a subset of an Activity into a common execution context.

Exception

Declare a node of execution that happens outside the normal flow of execution of an Activity.

Fork/Join

Simultaneously branch / join a set of Control or Object Flows.

SysML Activity  Relationships

Control Flow

Establish a flow of logic between two Activity nodes.

Control Flow (Continuous)

Declare a continuous control flow.

Control Flow (Discrete)

Declare a discrete control flow.

Control Flow (Probability)

Tag a control flow with a probability of the likelihood of the flow's traversal.

Object Flow

Establish a flow of objects (data) between two Activity nodes.

Object Flow (Continuous)

Declare a continuous object flow.

Object Flow (Discrete)

Declare a discrete object flow.

Object Flow (Probability)

Tag an object flow with a probability of the likelihood of the flow's traversal.

Interrupt Flow

Declare a control flow that interrupts flow within a Region.

SysML Activity  Extensions

Enhanced Functional Flow Block Diagrams

Declare an Activity used to contain an Enhanced Functional Flow Block Diagram (EFFBD).

Streaming Activity

Declare an Activity where the flow of tokens passes through its parameters continuously throughout the Activity's execution.

Non-Streaming Activity

Declare an Activity where the flow of tokens passes through its parameters at the start of the Activity's execution.