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SysML Parametrics Toolbox

When you are constructing SysML models, you can populate the SysML Parametric diagrams with constraint blocks, using the icons on the 'SysML Parametrics' pages of the Diagram Toolbox.

The Block that owns the Parametric diagram is automatically represented by a diagram frame enclosing the Parametric diagram elements. You can:

  • Hide the frame by right-clicking on the diagram and selecting the 'Hide Diagram Frame' option (and show it again by selecting the 'Show Diagram Frame' option)
  • Make the frame selectable to move or resize it, by right-clicking on it and selecting the 'Selectable' option
  • Create Ports and Parts on the frame and create connectors between them

If set to non-selectable, the frame will auto-resize to fit the bounds of the diagram, expanding from its default size but not shrinking smaller.

Note that diagrams showing Diagram Frames applied using release 14.0 or later of Enterprise Architect will draw the parent object on the diagram when opened using a release of Enterprise Architect earlier than release 14.0.

SysML Parametric diagram toolbox.


On the Diagram Toolbox, click on Search to display the 'Find Toolbox Item' dialog and specify 'SysML n.n Parametrics' (whichever version you are using).


Design > Diagram > Toolbox

Keyboard Shortcuts


SysML Parametrics Objects




Instantiates a Constraint Block for use in a Parametric diagram.


Defines a SysML property typed by a DataType, ValueType or Block.

SysML Parametrics Extensions



Objective Function

Defines a SysML Constraint Block for use as an objective function to evaluate Measures of Effectiveness (MOEs).

Measure of Effectiveness

Defines a SysML property for use as a Measure of Effectiveness (MOE).

SysML Block Internal




Describes the decomposition of a SysML Block in the context of its whole using instances of reusable SysML Blocks.

Connector Property

Creates an instance of an Association Block.

Distributed Property

Creates a stereotype of Property, to apply a probability distribution to the values of the property.

Flow Property

Creates a single kind of Flow element that can flow to or from a block.

Participant Property

Creates the end of a connector owned by an Association Block.

SysML Block Internal Relationships



See also


Establishes a traceable relationship describing how one element is dependant upon another.

Item Flow

Specifies the items that flow across a connector in an interaction point. Used in the same way as UML Information Flows.

Using Information Flows


Establishes Communication links between parts.


Binding Connector

Establishes a connection between two Parts in a system decomposition. If the Parts are different, the system provides an option to synchronize them.